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CAS NUMBER: 67627-18-3
MOLECULAR FORMULA: C16H7K3N2O11S3
MOLECULAR WEIGHT: 616.72
Potassium methylate is used in fine and heavy-tonnage organic synthesis as an alkaline catalyst, in particular in transesterification reactions.
Solid potassium methylate and its solution in methanol is produced with a weight content of 30-33%.
Recent years have seen a steady increase in the production of biodiesel, for which alkali metal methylate is a catalyst.
The use of alcoholate instead of hydroxide allows for a 10% increase in biodiesel output.
Potassium methylate consumption per tonne of biodiesel is 18kg.
Potassium methylate is a white to yellowish, hygroscopic, odorless crystalline powder which reacts violently with water forming potassium hydroxide and methanol.
The aqueous solutions obtained are highly basic and have a corrosive effect.
Potassium methylate is classified as an inflammable solid with a spontaneous ignition temperature of 70 °C.
The human toxicity and ecotoxicity evaluation of potassium methoxide is based on the properties of the decomposition products potassium hydroxide and methanol during hydrolysis in the aqueous medium.
Potassium methylate is the alkoxide of methanol with the counterion potassium and is used as a strong base and as a catalyst for transesterification, in particular for the production of biodiesel.
The preparation of potassium methoxide can be achieved on the laboratory scale by the (strongly exothermic) reaction of metallic potassium and methanol upon the release of equimolar amounts of hydrogen.
The reaction of metal hydrides (potassium hydride) with methanol forming potassium methoxide is also possible but less important.
The exothermic reaction of potassium hydroxide with methanol leads in an equilibrium reaction to potassium methanolate and water (avoiding formation of highly inflammable hydrogen gas).
In a continuous process the formed water must be removed permanently.
The complete removal of the water is critical for the reaction conversion, due to the pronounced hygroscopy of potassium hydroxide, which contains about 10% of water.
The significantly higher dissolution rate of potassium hydroxide in methanol compared to sodium hydroxide is advantageous.
On a large scale, potassium methoxide is produced by decomposing potassium amalgam with methanol, which is produced by the chloralkali-electrolysis of potassium chloride by the amalgam process.
Impurities of the resulting potassium methoxide in methanol with metallic mercury can be eliminated by ultrafiltration.
Solid potassium methoxide is obtained by distilling off the methanol.
Because of their simpler production and better handling for chemical purposes solutions of potassium methanolate are preferably used, which were continuously withdrawn from the amalgam process.
The displacement of the amalgam process by the ecologically and economically superior membrane process for the preparation of the mass chemicals sodium hydroxide and potassium hydroxide will make this standard production process for the production of alkali metal alkoxides in future useless.
Potassium methylate synthesis is conducted in a continuous process in a closed circuit with methanol recirculation.
Water formed in the chemical reaction and introduced as an impurity with the initial potassium hydroxide source, is removed from the distillation column cube and is treated as waste.
The technology differs from existing ones because the initial raw material is solid potassium hydroxide and methanol, taken in a quantity required to obtain the desired product and the only waste product is water.
The alkoxide potassium methylate is a clear, colorless liquid.
Potassium methylate 32% solution (dissolved in methanol, KM 32) is a catalyst in transesterification of specific oils and fats.
Almost all oils and fats can be transesterified using potassium catalysts (e.g. for biodiesel production).
As a result, the potassium methylate catalyst is used wherever price dictates alternative, cheaper raw products such as animal fats or used cooking oils (frying fat) be used in place of pure vegetable oils.
Potassium methylate is used as a condensation agent, a catalyst for the production of methyl formate, a strong alkaline catalyst for dimethylformamide, and can also be used as a pharmaceutical raw material.
Potassium methoxide is the alkoxide of methanol with the counterion potassium and is used as a strong base and as a catalyst for transesterification, in particular for the production of biodiesel.
The preparation of potassium methoxide can be achieved on the laboratory scale by the (strongly exothermic) reaction of metallic potassium and methanol upon the release of equimolar amounts of hydrogen.
The reaction of metal hydrides (potassium hydride) with methanol forming potassium methoxide is also possible but less important.
The exothermic reaction of potassium hydroxide with methanol leads in an equilibrium reaction to potassium methanolate and water (avoiding formation of highly inflammable hydrogen gas).
In a continuous process the formed water must be removed permanently.
The complete removal of the water is critical for the reaction conversion, due to the pronounced hygroscopy of potassium hydroxide, which contains about 10% of water.
The significantly higher dissolution rate of potassium hydroxide in methanol compared to sodium hydroxide is advantageous.
On a large scale, potassium methoxide is produced by decomposing potassium amalgam with methanol, which is produced by the chloralkali-electrolysis of potassium chloride by the amalgam process.
Impurities of the resulting potassium methoxide in methanol with metallic mercury can be eliminated by ultrafiltration.
Solid potassium methoxide is obtained by distilling off the methanol.
Because of their simpler production and better handling for chemical purposes solutions of potassium methanolate ( 25 to 32% by weight) are preferably used, which were continuously withdrawn from the amalgam process.
The displacement of the amalgam process by the ecologically and economically superior membrane process for the preparation of the mass chemicals sodium hydroxide and potassium hydroxide will make this standard production process for the production of alkali metal alkoxides in future useless.
Potassium methylate is a white to yellowish, hygroscopic, odorless crystalline powder which reacts violently with water forming potassium hydroxide and methanol.
The aqueous solutions obtained are highly basic and have a corrosive effect.
The substance is classified as an inflammable solid with a spontaneous ignition temperature of 70 °C.
The human toxicity and ecotoxicity evaluation of potassium methoxide is based on the properties of the decomposition products potassium hydroxide and methanol during hydrolysis in the aqueous medium.
The carbonylation of methanol with carbon monoxide to methyl formate (methyl methanoate) is catalyzed by strong bases, such as potassium methoxide.
The main application of potassium methoxide is use as basic transesterification catalyst in biodiesel synthesis (as a 25-32% methanolic solution).
Triglycerides of vegetable and animal origin are reacted with methanol in the presence of alkali metal methanolates to form the corresponding fatty methyl esters.
Potassium methylate allows a facilitated formation of fatty soaps in comparison to the (lower-priced) sodium methoxide (here potassium salts of the fatty acids from the triglycerides) and higher yields are obtained with potassium methoxide.
The optimum conditions for biodiesel production from canola oil are reported as being 1.59% by weight of potassium methoxide, a reaction temperature of 50 °C and a methanol/oil ratio of 4.5: 1.
The biodiesel yield is 95.8% with a fatty acid content of 0.75% by weight.
Potassium methylate is a very reactive solid and is handled in solution in most cases.
The solid is very hygroscopic and decomposes quickly.
Potassium methylate is only stable under exclusion of air and moisture.
Reacts violently with fire extinguishing agents such as water.
The potassium methoxide is a novel high-efficiency organic and fine chemical catalyst, can be used as a shrinkage agent and a catalyst, and is used for preparing products such as methyl formate, dimethylformamide, dimethyl carbonate and the like; can also be used as intermediate of medicine and pesticide for preparing vitamin B1Medicaments and pesticides such as vitamin A, sulfadiazine and the like; can also be used as catalyst for treating edible fat and edible oil; can also be used as analytical reagent, etcHas wide application.
At present, two process methods exist for producing potassium methoxide products; one is a 'metallic potassium method', which has the serious disadvantages of poor safety, easy explosion and the like in production, and has higher production cost due to the factors of expensive metallic potassium, difficult transportation, difficult storage and the like, and the method tends to be eliminated gradually.
The other is to react methanol with potassium hydroxide to produce potassium methoxide.
Potassium methylate is prepared by reacting potassium hydroxide with methanol in the presence of oxide as a dehydrating agent and a surfactant abroad.
The method has the defects of long flow, more equipment, troublesome operation and the like, and waste residues are also generated in the production.
Enterprises try to produce potassium methoxide by using potassium hydroxide in China, and the problem of methanol dehydration can be solved only by operating expensive methanol dehydration equipment, so that the production cost is greatly increased, and the enterprises do not put into production.
Therefore, the domestic required potassium methoxide products mainly depend on import or only can use sodium methoxide with poor effect as a substitute.
Potassium methylate, also referred to as potassium methanolate or potassium methylate, is potassium salt of methanol.
Akin to white crystalline odorless salt, it tends to react with water and is available in different concentrations.
Potassium methylate is usually stored and transported as a solution of 25% to 35% potassium methylate in methanol or ethanol.
Potassium methylate finds application as an intermediate and catalyst for agricultural and pharmaceutical syntheses.
Potassium methylate is also widely used in trans-esterification of organic fats, namely vegetable oil or animal fats into biodiesel and glycerol.
Further, Potassium methylate is used in the production of detergents and glycerol.
Potassium methylate plays the role of a catalyst for polymerization and isomerization reactions as well.
A report by Transparency Market Research furnishes crucial information on the global market for potassium methoxide by examining its historical and current data and the current competitive dynamics.
Potassium methylate presents a qualitative analysis of the growth drivers and restraints affecting the trajectory of the market and also attempts to gauge its future prospects.
Potassium methylate solution in methanol has been used as a base to synthesize imines via aerobic oxidative coupling of benzylic alcohols and amines in the presence of gold nanoparticles supported on titanium dioxide catalyst.
Potassium methylate is the alkoxide of methanol with the counterion potassium and is used as a strong base and as a catalyst for transesterification, in particular for the production of biodiesel.
Potassium methylate is a white to yellowish, hygroscopic, odorless crystalline powder which reacts violently with water forming potassium hydroxide and methanol.
The aqueous solutions obtained are highly basic and have a corrosive effect.
The substance is classified as an inflammable solid with a spontaneous ignition temperature of 70 °C.
The human toxicity and ecotoxicity evaluation of potassium methoxide is based on the properties of the decomposition products potassium hydroxide and methanol during hydrolysis in the aqueous medium.
USES:
The carbonylation of methanol with carbon monoxide to methyl formate (methyl methanoate) is catalyzed by strong bases, such as potassium methoxide.
The main application of potassium methoxide is use as basic transesterification catalyst in biodiesel synthesis (as a 25-32% methanolic solution).
Triglycerides of vegetable and animal origin are reacted with methanol in the presence of alkali metal methanolates to form the corresponding fatty methyl esters.
Potassium methylate allows a facilitated formation of fatty soaps in comparison to the (lower-priced) sodium methoxide (here potassium salts of the fatty acids from the triglycerides) and higher yields are obtained with potassium methoxide.
The optimum conditions for biodiesel production from canola oil are reported as being 1.59% by weight of potassium methoxide, a reaction temperature of 50 °C and a methanol/oil ratio of.
The biodiesel yield is 95.8% with a fatty acid content of 0.75% by weight.
APPLICATION:
-in colorimetric method of measurement of atmospheric ozone
-for measuring residual aqueous ozone by gas diffusion flow injection analysis.
-to determine O3 concentration in water.
PROPERTIES:
-Quality Level: 100
-assay: >60% (HPLC)
-form: crystals or chunks
-solubility: water: 0.1%
-λmax: 600 nm
-storage temp.: room temp
-SMILES string: [K+].[K+].[K+].[O-]S(=O)(=O)c1ccc2NC(C(=O)c2c1)=C3Nc4c(cc(cc4S([O-])(=O)=O)S([O-])(=O)=O)C3=O
-InChI: 1S/C16H10N2O11S3.3K/c19-15-8-3-6(30(21,22)23)1-2-10(8)17-13(15)14-16(20)9-4-7(31(24,25)26)5-11(12(9)18-14)32(27,28)29;;;/h1-5,17-18H,(H,21,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b14-13+;;;
-InChI key: XOSMXDUITYWYGR-VPOCKCTCSA-K
PHYSICAL AND CHEMICAL INFORMATION:
-Boiling point: 93.5 °C (1013 hPa)
-Density: 0.99 g/cm3 (20 °C)
-Explosion limit: 5.5 - 36.5 %(V) Methanol
-Flash point: 29.7 °C
-Ignition temperature: 415 °C DIN 51794
-Melting Point: <-20 °C
-pH value: 11 (H₂O)
-Vapor pressure: 36 hPa (20 °C)
STORAGE:
Fireproof.
Separated from strong oxidants, acids, metals and food and feedstuffs.
Dry.
Cool.
Well closed.
Store in an area having corrosion resistant concrete floor.
Store in an area without drain or sewer access.
SYNONYM:
Potassium methylate
potassium;methanolate
UNII-45MYQ0GWGB
45MYQ0GWGB
MFCD00012416
Methanol, potassium salt (1:1)
KOMe
MeOK
EINECS 212-736-1
KOCH3
Potassium methylate, 90+%
PotassiummethoxideClotrimazole
DTXSID1029627
Potassium methylate-dimethyl sulfoxide
AKOS015840107
Potassium methylate, 5% w/v in methanol
FT-0689057
J-524014
Q15424799
