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HPMA 50% Hydrolyzed polymaleic anhydride is a low-molecular-weight polymer widely used as a scale inhibitor and dispersant in water treatment and industrial systems.
HPMA 50% Hydrolyzed polymaleic anhydride is a polycarboxylic acid type organic compound, which is resistant to high temperature and can chelate calcium, magnesium, iron, etc. in water.
HPMA 50% Hydrolyzed polymaleic anhydride is used as reactive diluent and crosslinking agent in radiation curing system.
CAS Number: 26099-09-2
EC Number: 203-742-5
Molecular Formula: C4H4O4
Molecular Weight: 116.072 g/mol
Synonyms: HPMA, Polymaleic Acid, PolymaleicacidAq, Poly(maleic acid), POLY(MALEIC ACID), MALEIC ACID POLYMER, Maleic Acdi ( homopolymer ), Hydrolysed Polymaleic Anhydride, Hydrolized polymaleic anhydride, Hydrolyzed Polymaleic Anhydride, hydrolyzed polymaleic anhydride, (z)-2-butenedioic acid homopolymer, crease proofing PMA, 2-Butenedioic acid (2Z)-,homopolymer, Maleic acid,polymers, 2-Butenedioic acid (Z)-,homopolymer, Poly(maleic acid), Maleic acid polymer, Belclene 200, Maleic acid homopolymer, DP 3328, Acumer 4200, Aron A 6510, Belclene 710, Nonpol PMA 50W, Belclene 200LA, SH 150, Dequest P 9000, Bel 200 premix, Accent T 1107, Nonpol PWA 50W, 31050-04-1, 1253590-15-6, 1393887-65-4, 1431524-06-9
HPMA 50% Hydrolyzed polymaleic anhydride is a 50% aqueous solution of Poly Maleic Acid.
HPMA 50% Hydrolyzed polymaleic anhydride is a very effective Calcium Carbonate anti-scalant for use in industrial water treatment programs.
HPMA 50% Hydrolyzed polymaleic anhydride affected by oxidizing biocides, is particularly useful in hard water environments, and maintains excellent thermal stability in high temperature applications.
HPMA 50% Hydrolyzed polymaleic anhydride is a low-molecular-weight polymer widely used as a scale inhibitor and dispersant in water treatment and industrial systems.
HPMA 50% Hydrolyzed polymaleic anhydride exhibits excellent chemical and thermal stability, maintaining performance at high temperatures and pH levels.
HPMA 50% Hydrolyzed polymaleic anhydride effectively prevents the formation and deposition of inorganic salts and metal oxides, enhancing system efficiency and longevity.
HPMA 50% Hydrolyzed polymaleic anhydride is a polycarboxylic acid type organic compound, which is resistant to high temperature and can chelate calcium, magnesium, iron, etc. in water.
Good thermal stability, use PH range, wide water hardness, is an excellent scale inhibitor.
HPMA 50% Hydrolyzed polymaleic anhydride, as a low-cost and excellent green water treatment agent, has become an important member of high-efficiency water-soluble scale inhibitor and dispersant.
Especially under harsh environmental conditions such as high temperature, high pH value, high alkalinity, high hardness, etc., hydrolyzed polymaleic anhydride has a significant scale inhibition effect on calcium carbonate, calcium sulfate, etc., which is not general polypropylene acids and other organic copolymerization The dispersant can reach.
At the same time, hydrolyzed polymaleic anhydride has low toxicity, no carcinogenic and teratogenic effects, and is often used as a water treatment agent for circulating cooling water, low-pressure boiler water, and anti-scaling treatment for oilfield water injection, crude oil dehydration and other systems.
Applications of HPMA 50% Hydrolyzed Polymaleic Anhydride:
HPMA 50% Hydrolyzed polymaleic anhydride is mainly used in low-pressure boilers, industrial circulating cooling water systems, oil pipeline, crude oil dehydration and flash seawater desalination and other aspects of the scale inhibitor, and can be used as the main component of advanced cleaning agents, but also can be used as textile rinsing agent, reduces the ash content of textiles.
HPMA 50% Hydrolyzed polymaleic anhydride still has good scale inhibition and dispersion effect on carbonate below 300 ℃, and the scale inhibition time can reach COOH.
Due to the excellent scale inhibition performance and high temperature resistance of it, HPMA 50% Hydrolyzed polymaleic anhydride is widely used in the flash unit of seawater desalination and in the low pressure boiler, steam locomotive, crude oil dehydration, water transfer pipeline and industrial circulating cooling water.
In addition, HPMA 50% Hydrolyzed polymaleic anhydride has a certain corrosion inhibition effect, and the effect of compound with zinc salt is better, which can effectively prevent the corrosion of carbon steel.
HPMA 50% Hydrolyzed polymaleic anhydride is usually (1~15)× 10-6 and organic phosphate compound, for circulating cooling water, oil field water injection, crude oil dehydration treatment and low pressure boiler furnace treatment.
HPMA 50% Hydrolyzed polymaleic anhydride has a good effect of inhibiting scale formation and stripping old scale, and the scale inhibition rate can reach 98%.
HPMA 50% Hydrolyzed polymaleic anhydride is used as reactive diluent and crosslinking agent in radiation curing system.
HPMA 50% Hydrolyzed polymaleic anhydride can also be used as resin crosslinking agent, plastic and rubber modifier.
Water treatment:
As an effective scale inhibitor and dispersant in industrial and cooling water systems
Boiler and RO systems:
HPMA 50% Hydrolyzed polymaleic anhydride prevents calcium carbonate and calcium sulfate scaling
Detergents and cleaning formulations:
HPMA 50% Hydrolyzed polymaleic anhydride acts as a threshold agent and dispersing polymer
Oilfield and process water treatment:
HPMA 50% Hydrolyzed polymaleic anhydride is used to stabilize metal ions and prevent fouling
Water Treatment Industry:
Industrial Circulating Water:
HPMA 50% Hydrolyzed polymaleic anhydride is used for scale and corrosion prevention in circulating cooling water systems in power plants, chemical plants, and other applications.
Boiler Water Treatment:
HPMA 50% Hydrolyzed polymaleic anhydride prevents scaling in low-pressure boilers, extending equipment life.
Seawater Desalination:
HPMA 50% Hydrolyzed polymaleic anhydride inhibits salt scale formation in flash evaporation equipment, improving desalination efficiency.
Petrochemical Industry:
Oilfield Water Injection:
HPMA 50% Hydrolyzed polymaleic anhydride prevents scaling in injection pipes, ensuring oil well production efficiency.
Crude Oil Evaporation:
HPMA 50% Hydrolyzed polymaleic anhydride reduces evaporator scaling and reduces energy consumption.
Oil Pipelines:
HPMA 50% Hydrolyzed polymaleic anhydride inhibits corrosion on pipeline walls, extending service life.
Other Industries:
Cement Additive:
HPMA 50% Hydrolyzed polymaleic anhydride improves cement fluidity and enhances workability.
Detergent:
HPMA 50% Hydrolyzed polymaleic anhydride is used as a water softener to enhance cleaning performance.
Uses of HPMA 50% Hydrolyzed Polymaleic Anhydride:
HPMA 50% Hydrolyzed polymaleic anhydride has high chemical stability and temperature resistance, and has obvious solubility limit effect when pH value is 8.3.
HPMA 50% Hydrolyzed polymaleic anhydride can chelate calcium and magnesium plasma in water and has lattice distortion ability, which can improve the fluidity of sludge.
HPMA 50% Hydrolyzed polymaleic anhydride is especially suitable for scale inhibition in high-temperature water systems such as boiler water.
HPMA 50% Hydrolyzed polymaleic anhydride can be used as oil field water pipeline, circulating cooling water system and flash seawater desalination and other sediment inhibitors, scale inhibitors, etc., can also be used as a basic industrial detergent.
Hydrolyzed polymaleic anhydride cocoa is used for scale inhibition of industrial circulating cooling water, oil field water pipelines and boiler water.
Desalination and scale prevention of seawater by flash evaporation and used as an ingredient in advanced cleaning agents.
The general dosage is 1-5PPM.
HPMA 50% Hydrolyzed polymaleic anhydride can be used for oil field water pipelines, steam locomotive boilers, medium and low pressure boilers, seawater desalination, circulating cooling water, and scale inhibitor and dispersant.
HPMA 50% Hydrolyzed polymaleic anhydride can also be used as a textile cleaning agent.
General dosage 2 × 10-6~10-5.
HPMA 50% Hydrolyzed polymaleic anhydride is used as scale inhibitor and corrosion inhibitor in steam locomotive, industrial boiler water, cold water, and oil field water injection treatment.
HPMA 50% Hydrolyzed polymaleic anhydride is a high-efficiency scale inhibitor, mainly used in low-pressure boilers, industrial circulating cooling water systems, oil field water pipelines, crude oil dehydration, etc.
HPMA 50% Hydrolyzed polymaleic anhydride has high chemical stability and temperature resistance, and has obvious pH value when 8.3.
The solubility limit effect can chelate with calcium and magnesium plasma in water and have lattice distortion ability, which can improve the fluidity of sludge.
HPMA 50% Hydrolyzed polymaleic anhydride is especially suitable for scale inhibition of high warm water systems such as boiler water.
HPMA 50% Hydrolyzed polymaleic anhydride can be used as a sediment inhibitor, scale inhibitor, etc. for oilfield water pipelines, circulating cooling water systems, and flash evaporation seawater desalination.
HPMA 50% Hydrolyzed polymaleic anhydride can also be used as an alkaline industrial cleaner.
HPMA 50% Hydrolyzed polymaleic anhydride is constitute with organic phosphoric acid, zinc salts as excellent corrosion and scale inhibitors, which is widely used in fertilizer plants, power plants, steel mills, oil extraction plants and other industries for cooling circulating water.
HPMA 50% Hydrolyzed polymaleic anhydride can be used alone as a good scale inhibition and dispersion agent, cleaning agent.
Key Features of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Excellent scale inhibition and dispersing performance
Stable under high temperature and alkaline conditions
Compatible with phosphonates and other polymers
Non-toxic, non-corrosive, and biodegradable
Free from phosphorus and heavy metals
Functions of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Scale Inhibition:
Calcium and Magnesium Salt Deposition Inhibition:
By chelating calcium and magnesium ions in water, HPMA 50% Hydrolyzed polymaleic anhydride prevents the formation of scales such as calcium carbonate and calcium phosphate.
High Temperature Tolerance:
Effectively inhibits scale at 300°C for up to 100 hours, making HPMA 50% Hydrolyzed polymaleic anhydride suitable for high-temperature water systems.
Synergistic Effect:
When used in combination with organic phosphonates, HPMA 50% Hydrolyzed polymaleic anhydride achieves a scale inhibition rate of up to 98%, significantly improving water treatment efficiency.
Corrosion Inhibition:
Carbon Steel Protection:
When combined with zinc salts, HPMA 50% Hydrolyzed polymaleic anhydride forms a protective film on metal surfaces, effectively inhibiting corrosion.
Applications:
Suitable for corrosion protection in equipment such as circulating cooling water systems, oilfield water injection, and low-pressure boilers.
Dispersibility:
Disperses suspended particles in water, preventing deposition and maintaining system cleanliness.
Nature of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Soluble in water, chemical stability and high thermal stability, decomposition temperature of 330.
50% of the aqueous solution is light yellow viscous liquid, density is greater than or equal to 1. 2g/cm3,pH value is 1~2.
HPMA 50% Hydrolyzed polymaleic anhydride is a low molecular weight polyelectrolyte, non-toxic, soluble in water, high chemical and thermal stability, decomposition temperature above 330 ℃.
Production of HPMA 50% Hydrolyzed Polymaleic Anhydride:
The polymerization was initiated in the presence of benzoyl peroxide with maleic anhydride as a raw material and toluene as a solvent.
200 parts maleic anhydride, 80 parts water and one part catalyst are added into the kettle.
After heating and reflux, 100 parts of hydrogen peroxide are added dropwise at 100~120 ℃.
After the reaction, heat and reflux for 30 min to obtain a clear and transparent brown-yellow hydrolyzed product.
Using water as solvent and maleic acid rod as monomer in the presence of initiator for polymerization.
Synthesis Method of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Add a certain amount of maleic anhydride and water to a 1000m four-mouth flask equipped with thermometer, stirrer, reflux condenser and constant pressure drop funnel, and raise the temperature to 60 ℃.
After the maleic anhydride is completely dissolved, add an appropriate amount of catalyst and self-made auxiliary AXL, start the stirrer and raise the temperature to the set temperature at the same time, control a certain reaction temperature, and add the initiator within a certain period of time through a constant pressure drop funnel.
After dropping, continue the heat preservation reaction for 2h to obtain hydrolyzed polymaleic anhydride products.
Stability and Reactivity of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Chemical stability:
HPMA 50% is stable under normal handling and storage conditions.
Reactivity:
Reactivity is low under normal conditions.
HPMA 50% Hydrolyzed polymaleic anhydride is acidic and may be corrosive to some metals.
Conditions to avoid:
Avoid contact with incompatible materials.
Avoid improper storage conditions.
Incompatible materials:
Strong alkalis.
Oxidizing agents.
Nitrites.
Sulfites.
Mild steel.
Carbon steel.
Aluminum.
Other reactive metals.
Hazardous decomposition products:
Carbon monoxide.
Carbon dioxide may form during decomposition or fire.
Hazardous polymerization:
Hazardous polymerization is not expected under normal conditions.
Handling and Storage of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Handling:
Avoid contact with eyes.
Skin.
Clothing.
Avoid breathing vapor.
Mist.
Aerosol.
Keep the container closed when not in use.
Use only with adequate ventilation.
Wash hands and exposed skin thoroughly after handling.
Storage:
Store in a cool, dry, well-ventilated area.
Keep the container tightly closed and upright to prevent leakage.
Store away from incompatible substances.
Avoid contact with metals.
Suitable storage/contact materials may include PVC.
Polypropylene.
Polyethylene.
Glass-lined equipment.
Glass-reinforced plastic.
First Aid Measures of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Inhalation:
Move the person to fresh air.
Keep them warm and at rest.
If breathing is difficult or irregular.
Seek medical attention immediately.
Skin contact:
Remove contaminated clothing and shoes.
Wash affected skin with plenty of water and soap for at least 15–20 minutes.
Get medical attention if irritation persists.
Eye contact:
Rinse immediately with plenty of water for several minutes.
Lifting eyelids occasionally.
Remove contact lenses if present and easy to do.
Get medical attention immediately.
Ingestion:
Rinse mouth with water.
Do not induce vomiting.
Never give anything by mouth to an unconscious person.
Seek medical attention immediately.
Firefighting Measures of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Suitable extinguishing media:
Dry chemical.
Carbon dioxide.
Foam.
Water spray.
Fine water mist.
Fire hazards:
HPMA 50% has a low fire hazard.
Thermal decomposition may produce irritating or toxic fumes.
Firefighting instructions:
Use extinguishing media suitable for the surrounding fire.
Cool exposed containers with water spray from a safe distance.
Avoid inhalation of vapors.
Mist.
Combustion products.
Protective equipment:
Firefighters should wear full protective clothing.
Self-contained breathing apparatus.
Accidental Release Measures of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Personal precautions:
Avoid direct contact with the spilled material.
Use suitable PPE.
Ensure adequate ventilation.
Environmental precautions:
Prevent entry into drains.
Surface water.
Soil.
Sewage systems.
Small spills:
Absorb with sand or another non-combustible absorbent material.
Collect the material in a suitable closed container for disposal.
Large spills:
Stop the leak if it can be done safely.
Dike the spill for later disposal.
Keep unnecessary personnel away from the area.
Dispose of waste according to local regulations.
Exposure Controls / Personal Protective of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Engineering controls:
Use local exhaust ventilation or mechanical ventilation.
Especially where mist or aerosol may form.
Provide emergency eyewash and safety shower near the work area.
Respiratory protection:
Use suitable respiratory protection if ventilation is inadequate.
Exposure to mist/aerosol is possible.
Hand protection:
Wear chemical-resistant gloves.
Such as rubber or compatible protective gloves.
Eye protection:
Wear splash-resistant safety goggles.
Chemical safety goggles.
Skin/body protection:
Wear chemical-resistant protective clothing to prevent skin contact.
Hygiene measures:
Do not eat.
Drink.
Smoke while handling.
Wash thoroughly after use.
Wash contaminated clothing before reuse.
Identifiers of HPMA 50% Hydrolyzed Polymaleic Anhydride:
CAS No.: 26099-09-2
Molecular Formula: (C4H4O4)x
InChIKeys: InChIKey=VZCYOOQTPOCHFL-UPHRSURJSA-N
Molecular Weight: 116.072
Exact Mass: 116.011
EC Number: 203-742-5
DSSTox ID: DTXSID6051227
Categories: Polymer
Properties of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Molecular Formula: C4H4O4
Molar Mass: 116.07
Density: 1.18 (48% aq.)
Flash Point: 95 °C
Storage Condition: 2-8°C
appearance: light yellow to tan-red transparent liquid
% solids ≥: 48.0
bromine number mg/g ≤: 80.0
average molecular weight ≥: 450
pH(1% aqueous solution): 2.0-3.0
density (20 ℃)g/cm3 ≥: 1.18
Molecular Weight: 116.07
XLogP3: -0.3
Hydrogen Bond Donor Count: 2
Hydrogen Bond Acceptor Count: 4
Rotatable Bond Count: 2
Exact Mass: 116.01095860
Monoisotopic Mass: 116.01095860
Topological Polar Surface Area: 74.6
Heavy Atom Count: 8
Complexity: 119
Undefined Bond Stereocenter Count: 1
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes
PSA: 74.6
XLogP3: -0.3
Appearance: Maleic acid is a colorless crystalline solid having a faint odor.
Density: 118 (48% aq)
Melting Point: 131°C
Boiling Point: 275° F at 760 mm Hg (decomposes)
Flash Point: 95 °C
Water Solubility: Solubility in water, g/100ml at 25°C: 78
Storage Conditions: 2-8°C
Vapor Pressure: 1.34X10-5 mm Hg at 25 deg C
Vapor Density: 4.0 (Air = 1)
Odor: Faint acidulous odor
Taste: Characteristic repulsive, astringent taste
PKA: 1.83
Specifications of HPMA 50% Hydrolyzed Polymaleic Anhydride:
Appearance: Clear colorless liquid
Assay: ≥97%
Color(APHA): ≤30
Free Acid: ≤0.30%
Moisture: ≤0.30%
Inhibitor Level: 200±20ppm
Appearance: Yellow Transparent Liquid
Solids Content, %: 48 - 52%
pH (1% solution): 2.0 - 3.0
Specific Gravity @ 25°C: 1.18 - 1.24
Free Content (as Maleic Acid), %: 3.5% max
Boiling Point Range, °C: 100 - 102°C
Freezing Point, °C: -5 to - 12°C
