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Hydrolyzed Polymaleic Anhydride = HMPA
EC / List no.: 607-861-7
CAS no.: 26099-09-2
Hydrolyzed polymaleic anhydride is a phosphorus-free water treatment chemical.
Hydrolyzed polymaleic anhydride forms a chelate with calcium and magnesium ions in water.
And hydrolyzed polymaleic anhydride can cause lattice distortion.
After the anion is adsorbed by the calcium carbonate nucleus, the nucleus can be charged.
Due to the homophobic electrical repelling, tiny grains are dispersed in the aqueous solution.
The precipitate is converted into a loose slag with good fluidity.
This phenomenon has a good effect on peeling off the old scale.
Hydrolyzed polymaleic anhydride (HPMA) is compatible with other low-phosphorus corrosion and scale inhibitors such as ATMP and PBTCA.
The formed composite corrosion and scale inhibitor can be widely used in the treatment of circulating cooling water, boiler water, oil field water injection, industrial water.
Hydrolyzed Polymaleic Anhydride Structural Analysis
Hydrolyzed polymaleic anhydride (HPMA) is the product of partial hydrolysis of polymaleic anhydride.
Hydrolyzed polymaleic anhydride has been determined that about 60% to 70% of the polymaleic anhydride is hydrolyzed to a carboxylic acid. That is not completely hydrolyzed.
Hydrolyzed polymaleic anhydride is shown by the study of the structure-effect relationship of molecular microstructure.
The increase in the degree of hydrolysis is advantageous for Hydrolyzed polymaleic anhydride chemical improvement in scale inhibition performance.
Therefore, a large degree of hydrolysis is ensured as much as possible during synthesis of hydrolyzed polymaleic anhydride.
From hydrolyzed polymaleic anhydride structural analysis, its carboxyl group in the molecule can form compounds with calcium and magnesium ions in water.
And Hydrolyzed polymaleic anhydride can promote lattice distortion and turn the precipitation into a loose slag with good fluidity.
Hydrolysed polymaleic anhydride is the same as a polymer having a hydroxyl group or a sulfonic acid group.
Hydrolyzed polymaleic anhydride can be dissociated into hydrogen ions and acid anions after being dissolved in water. The chain molecules are then negatively charged.
This long-chain negatively charged anion is adsorbed by calcium carbonate nucleus and fine crystal grains.
Then bring Hydrolyzed polymaleic anhydride with a more negative charge.
The crystallites are dispersed into the aqueous solution due to the homophobic electrical repelling.
This prevents the fine grains from coagulating to form larger crystals.
Thus, Hydrolyzed polymaleic anhydride has a dissolution limiting effect.
Hydrolyzed polymaleic anhydride has high scale inhibition performance when used at low doses.
In addition, the carbonyl group of Hydrolyzed polymaleic anhydride has a strong complexation as an electron donor.
This changes the normal morphology of calcium carbonate and calcium phosphate crystals.
And can prevent hydrolyzed polymaleic anhydride from growing into a larger crystal.
Thereby it has the effect of inhibiting scale formation and peeling off the old scale.
Hydrolyzed Polymaleic Anhydride Characteristics
Hydrolyzed polymaleic anhydride chemical is a class of polycarboxylic acid scale inhibitors.
Hydrolyzed polymaleic anhydride can be matched with other corrosion inhibitors and scale inhibitors.
The molecular weight of Hydrolyzed polymaleic anhydride is about 600~1200.
The aqueous solution is brownish yellow or brownish red, viscous, acidic liquid. Hydrolyzed polymaleic anhydride (HPMA) is chemically stable.
Hydrolyzed polymaleic anhydride can be used at temperatures below 350 °C.
Hydrolysed polymaleic anhydride has excellent scale inhibition performance for carbonate and phosphate.
Hydrolyzed polymaleic anhydride has significant solubility effects and significant dispersion effects.
Hydrolyzed polymaleic anhydride can be adapted to water quality at different pH values.
Hydrolyzed polymaleic anhydride chemical is phosphorus-free, non-toxic and environmentally friendly.
Hydrolyzed polymaleic anhydride can be degraded by microorganisms in the natural environment.
The degradation products have no effect on the ecological environment.
Hydrolyzed polymaleic anhydride Scale Inhibition Performance
The hydrolyzed polymaleic anhydride has the following scale inhibition characteristics.
(1) Hydrolyzed polymaleic anhydride is quite effective for calcium carbonate scale.
At the same time, it has both lattice distortion and threshold effect (ie, unidirectional conductivity).
Even if it is scaled, it is relatively loose.
Hydrolyzed polymaleic anhydride is easily washed away by water and not formed into a hard scale.
(2) Hydrolyzed polymaleic anhydride has high-temperature resistance. Decomposition usually occurs above 350 °C. Can be used at high temperatures.
(3) Hydrolyzed polymaleic anhydride has a certain ability to disperse calcium carbonate, calcium phosphate, calcium sulfate and the like.
(4) Hydrolyzed polymaleic anhydride can be compounded with a zinc salt. There is a synergistic effect on corrosion inhibition of carbon steel.
(5) Hydrolyzed polymaleic anhydride is non-toxic. No significant impact on the environment.
The Hydrolyzed polymaleic anhydride chemical corrosion inhibition mechanism is as follows.
The oxygen atom in the polar group (—COOH) and (—OH) in the Hydrolyzed polymaleic anhydride molecule can become the adsorption center.
Hydrolyzed polymaleic anhydride can form a chelate with metal ions in water. Adsorbed on the metal surface. A protective film is formed along the metal surface.
Thereby playing a role in corrosion inhibition.
A single polymaleic anhydride is an excellent scale inhibitor.
The corrosion inhibition performance is poor.
Compared with polyacrylic acid and polymethacrylic acid, Hydrolyzed polymaleic anhydride corrosion inhibition performance is slightly stronger.
C-P bonds and phosphinic acid groups (-PO2H2) are usually introduced to enhance corrosion inhibition performance.
Hydrolyzed Polymaleic Anhydride Synthesis
A 250 mL four-necked flask was charged with a thermometer, a stirrer, a condenser, and a dropping funnel, and a certain amount of maleic anhydride and water was added.
The water is warmed to 55 to 60 °C.
After all the maleic anhydride has been dissolved, an appropriate amount of the catalyst is added. The stirrer was turned on while raising the temperature to the reaction temperature.
The initiator was added dropwise through a dropping funnel over a period of time.
Pay attention to controlling the temperature during the addition of the initiator.
After the completion of the dropwise addition, the reaction was continued for 1 hour to obtain a polymaleic acid product.
Properties:
Hydrolyzed polymaleic anhydride is a low molecular weight polymeride, with average molecular weight 400-800.
No toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330℃.
Poly maleic anhydride has an obvious threshold effect under high temperature (350℃) and high pH(8.3) level, suitable to be used in the alkaline water system or built with agents.
Hydrolyzed polymaleic anhydride has good scale inhibition against carbonate and phosphate scales under temperature 300℃ with effective time as long as 100 hours.
Due to its good scale inhibition and high-temperature tolerance properties, polymaleic acid is widely used in the desalination plant of flash vaporization equipment, low-pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
In addition, hydrolyzed polymaleic anhydride has good corrosion inhibition effect when used together with the zinc salt.
Poly maleic anhydride can also be used as additives for cement.
Specifications:
Item: Index
Appearance: Pale yellow to umber transparent liquid
Solid content, %: 48.0 Min.
Bromine value, mg/g: 80.0 Max.
Average molecular weight: 450 Min.
Density (20℃), g/cm3: 1.18 Min.
pH (1% solution): 2.0-3.0
Usage:
Hydrolyzed poly maleic anhydride is usually used together with organic phosphonate at a dosage of 1-15ppm for circulating cool water system, oilfield fill water, crude oil dewatering, and low-pressure boilers.
Poly maleic anhydride has good scale inhibition (98%) and scales stripping properties.
When used together with zinc salts, it can effectively inhibit carbon steel corrosion.
Used in Oil Fields and Gas Wells
In a closed gas well and a cement mud well, 0.01 to 5.0% by weight of polymaleic anhydride is added as a fluidity improver. Hydrolyzed polymaleic anhydride also acts as a turbulence inducer.
The amount of the auxiliary agent is preferably about 0.1% to 2.0% by dry weight of the cement.
Especially when pumping mud into the required location during the well-sealing operation.
Polymaleic anhydride greatly increases the flow rate and turbulence of the mud.
Its main advantage is able to reduce the pump pressure required at a specific flow rate.
Or get a higher flow rate under a fixed pumping condition.
Used in Daily Chemicals
Polymaleic anhydride or its hydrolyzate may be added to detergents of sodium dodecylbenzene sulfonate.
This can improve the quality of the detergent. Generally, the amount of poly maleic anhydride added is only 2.5%. After the addition, the detergent or soap can prevent the inorganic salt insoluble matter from sinking on the textile when washing the textile.
This is especially effective when washing textiles with hard water.
This not only saves resources but also improves washing efficiency.
Other Uses
Reacts with a diamine to form a powder resin which is excellent in thermal stability.
The heat resistance of this powder resin can reach 400 °C.
Hydrolyzed polymaleic anhydride can be used as a dispersing agent for inorganic pigments to increase the fineness of inorganic pigments.
As a soil conditioner.
Hydrolyzed poly maleic anhydride can improve the alkali field and has a protective effect.
This is because it is a polyelectrolyte and is water-absorptive.
In the emulsion suspension polymerization process, polymaleic anhydride can be used as a particle size modifier for the polymer.
Polymaleic anhydride and amine react to form semi amide. Semiamide can be used as a modifier for oil.
Such as slurry dispersant, viscosity improver, rust inhibitor, flocculant.
Polymaleic anhydride of different molecular weights can also be used as thickeners, dispersants, foam stabilizers, suspending agents, and the like.
Uses
Industry Uses
Corrosion inhibitors and anti-scaling agents
General Manufacturing Information
Industry Processing Sectors
Paper manufacturing
Polymaleic acid is the homopolymer of maleic acid.
Hydrolyzed polymaleic anhydride is very stable in presence of chlorine and other oxidizing biocides.
Hydrolyzed polymaleic anhydride has good scale inhibition and high temperature resistance properties.
Therefore, it can be used in the water desalination plants.
Hydrolyzed polymaleic anhydride is also an excellent calcium carbonate antiscalant upon high temperature and in the high alkaline cooling water systems.
In addition, it can be used in combination with zinc salts as a corrosion inhibitor.
Hydrolyzed polymaleic anhydride can also be used as concrete additive and for crude oil evaporation.
Hydrolyzed polymaleic anhydride can be manufactured through the polymerization of maleic anhydride I an aromatic hydrocarbon upon 60° to 200° C.
Properties:
Hydrolyzed Polymaleic Anhydride is a low molecular weight polymeride, with average molecular weight 400-800.
No toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330℃.
Hydrolyzed Polymaleic Anhydride has obvious threshold effect under high temperature (350℃) and high pH（8.3）level, suitable to be used in alkaline water system or built with agents.
Hydrolyzed polymaleic anhydride has good scale inhibition against carbonate and phosphate scales under temperature 300℃ with effective time as long as 100 hours.
Due to its good scale inhibition and high temperature tolerance properties, Hydrolyzed polymaleic anhydride is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
In addition, Hydrolyzed polymaleic anhydride has good corrosion inhibition effect when used together with zinc salt.
Hydrolyzed Polymaleic Anhydride can also used as additives for cement.
Hydrolyzed Polymaleic Anhydride is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cooling water systems.
In addition, Hydrolyzed Polymaleic Anhydride has good corrosion inhibition effect when used together with zinc salt.
Hydrolyzed polymaleic anhydride can also used as additives for cement and saline soil improver.
Usage:
Hydrolyzed Polymaleic Anhydride is usually used together with organic phosphonate at dosage of 1-15ppm for circulating cool water system, oilfield fill water, crude oil dewatering and low-pressure boilers.
Hydrolyzed Polymaleic Anhydride has good scale inhibition (98%) and scale stripping properties.
When used together with zinc salts, it can effectively inhibit carbon steel corrosion.
Hydrolyzed Polymaleic Anhydride (HPMA)
Good scale inhibition and high temperature tolerance properties.
Used in flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
Properties:
Hydrolyzed Polymaleic Anhydride has good scale inhibition against carbonate and phosphate scales under temperature 300℃ with effective time as long as 100 hours.
Due to its good scale inhibition and high temperature tolerance properties, Hydrolyzed Polymaleic Anhydride is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
In addition, Hydrolyzed Polymaleic Anhydride has good corrosion inhibition effect when used together with zinc salt.
Application:
Flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
Hydrolyzed Polymaleic Anhydride with zinc salt for corrosion inhibition.
Additives for cement.
USAGE:
Hydrolyzed polymaleic anhydride is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
Hydrolyzed polymaleic anhydride is usually used together with organic phosphonate at dosage of 1-15ppm for circulating cool water system oilfield fill water, crude oil dewatering and low-pressure boilers.
Hydrolyzed polymaleic anhydride can also used as additives for cement, cooling water treatment, boilers, evaporators, RO membranes, secondary oil recovery.
Hydrolyzed Polymaleic Anhydride (HPMA), primarily used in desalination plants, is a low molecular weight polymeride, having average molecular weight of around 400-800.
Hydrolyzed polymaleic anhydride possesses various physical as well as chemical properties.
For instance, it has no toxicity, is soluble in water and possesses high thermal and chemical stability and its decomposed temperature is above 330 ?.
Moreover, it shows the threshold effect under high temperatures and pH levels and thus, is suitable to be used in alkaline water systems.
Hydrolyzed polymaleic anhydride is used for various purposes, such as circulation of cool water systems, crude oil dewatering, oilfield fill water and low pressure boilers.
Hydrolyzed polymaleic anhydride can also be utilized as a cement additive.
The manufacturing process of hydrolysed polymaleic anhydride comprises polymerising maleic anhydride in xylene, which acts as a solvent, and utilizing ditertiary butyl peroxide as a polymerisation catalyst to produce liquid products which can be easily separated.
Hydrolyzed polymaleic anhydride is predominantly used in purification plants.
Hydrolyzed polymaleic anhydride is a low molecular weight polymeride.
Hydrolyzed polymaleic anhydride possesses various physical as well as chemical properties.
For instance, it has no toxicity, and is soluble in water.
Hydrolyzed polymaleic anhydride possesses high thermal and chemical stability.
Hydrolyzed polymaleic anhydride is used for various purposes, such as circulation of cool water systems, crude oil dewatering, oilfield fill water, and low pressure boilers.
Hydrolyzed polymaleic anhydride is also used in cement additives. The production process of hydrolyzed polymaleic anhydride encompasses polymerizing maleic anhydride in xylene, which is a solvent.
No toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330 centigrade.
Hydrolyzed polymaleic anhydride has obvious threshold effect under high temperature (350 centigrade) and high pH(8.3)level, suitable to be used in alkaline water system or built with agents.
Hydrolyzed polymaleic anhydride has good scale inhibition against carbonate and phosphate scales under temperature 300 centigrade with effective time as long as 100 hours.
Due to its good scale inhibition and high temperature tolerance properties, Hydrolyzed polymaleic anhydride is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
In addition, Hydrolyzed polymaleic anhydride has good corrosion inhibition effect when used together with zinc salt.
Hydrolyzed polymaleic anhydride can also used as additives for cement.
Specification:
Appearance: Clear to umber transparent liquid
Solid content: 48.0% min
Bromine value: 80.0 mg/g max
Average molecular weight: 450 min
pH(1% solution): 2.0-3.0
Usage:
Hydrolyzed polymaleic anhydride is usually used together with organic phosphonate at dosage of 1-15ppm for circulating cool water system, oilfield fill water, crude oil dewatering and low-pressure boilers.
Hydrolyzed polymaleic anhydride has good scale inhibition (98%) and scale stripping properties.
When used together with zinc salts, it can effectively inhibit carbon steel corrosion.
Our range of Hydrolyzed Polymaleic Anhydride (HPMA) is a low molecular weight polymeride, with average molecular weight 400-800. No toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330.C.
Hydrolyzed polymaleic anhydride has obvious threshold effect under high temperature (350.C) and high pH(8.3)level, suitable to be used in alkaline water system or built with agents.
It has good scale inhibition against carbonate and phosphate scales under temperature 300.C with effective time as long as 100 hours.
Due to its good scale inhibition and high temperature tolerance properties, Hydrolyzed polymaleic anhydride is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
In addition, Hydrolyzed polymaleic anhydride has good corrosion inhibition effect when used together with zinc salt.
Hydrolyzed polymaleic anhydride can also used as additives for cement.
Specification:
items index
Appearance Pale yellow to umber transparent liquid
Solid content % 48.0 min
Bromine value mg/g 80.0 max
Average molecular weight 450 min
pH(1% solution) 2.0-3.0
Density (20.C)g/cm3 1.18 min
Product Introduction
Hydrolysed Polymaleic Anhydride (HPMA)
CAS NO. 26099-09-02
UN NO:3265 CALSS: 8
Molecular Formula: (C4H4O4)n
Hydrolysed Polymaleic Anhydride (HPMA) other names (Z)-2-Butenedioic acid homopolymer; Hydrolyzed polymaleic anhydride; HPMA; PMA; is a low molecular weight polymeride, with average molecular weight 400- 800.
No toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330 degree.
Hydrolyzed polymaleic anhydride has obvious threshold effect under high temperature (350degree) and high pH(8.3) level, suitable to be used in alkaline water system or built with agents.
It has good scale inhibition against carbonate and phosphate scales under temperature 300degree with effective time as long as 100 hours.
Due to its good scale inhibition and high temperature tolerance properties, In addition, Hydrolyzed polymaleic anhydride has good corrosion inhibition effect when used together with zinc salt.
Product application
Hydrolyzed polymaleic anhydride is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
Hydrolyzed polymaleic anhydride is usually used together with organic phosphonate for circulating cool water system oilfield fill water, crude oil dewatering and low-pressure boilers.
Hydrolyzed polymaleic anhydride can also used as additives for cement, cooling water treatment, boilers, evaporators, RO membranes, secondary oil recovery.
IUPAC NAMES:
(2R,3R)-2,3-dimethylbutanedioic acid
2-Butenedioic acid (2Z)-, homopolymer
2‐Butenedioic acid (2Z)‐, homopolymer
ACIDO POLIMALEICO
Hydrolyzed Polymaleic Anhydride
POLY(MALEIC ACID)
Poly(maleic acid)
poly(maleic acid)
Polymaleic Acid
Polymaleic acid
polymaleic acid
SYNONYMS:
Butenedioic acid
26099-09-2
PolymaleicacidAq
2-aButenedioic acid
1,2-Ethenedicarboxylic
POLY(MALEIC ACID)
(z)-2-butenedioic acid homopolymer
poly(maleicacid)(50%aq)
MALEIC ACID POLYMER
hydrolyzed polymaleic anhydride
Hydrolysed Polymaleic Anhydride
PolymaleicacidAq
Maleic Acdi ( homopolymer )
2-Butenedioic acid (2Z)-, homopolymer
(50% AQ)
HPMA
PMA
maleic acid homopolymer
Hydrolized polymaleic anhydride
2-Butenedioicacid(Z)-,homopolymer
Hydroxypropylmethacrylamide
Maleic acid resin
26099-09-02
HoMopolyMer of Maleic Acid(HPMA)
POLYMALEIC ACID (PMA)
Poly(maleic acid) HPMA
48% or 50% Polymaleic acid HPMA
Polymaleic acid ISO 9001：2015 REACH
