N-METHYL PYRROLIDONE(NMP), molecular formula :C5H9NO, English：1-Methyl-2-pyrrolidinone, colorless to yellowish transparent liquid, slightly ammonia odor, miscible with water in any proportion, dissolved in ethyl ether, acetone, ester, halogenated hydrocarbon, aromatic hydrocarbons and other organic solvents, Almost all solvents complete Chemicalbook mix, boiling point 204℃, flash point 91℃, hygmoscopic, chemical stability, no corrosion to carbon steel, aluminum, slightly corrosive to copper. It has the advantages of low viscosity, good chemical stability and thermal stability, high polarity, low volatility, and infinite miscibility with water and many organic solvents. This product is a mild drug, the allowable limit concentration in the air is 100PPM.
Properties and stability:
1. Colorless liquid, ammonia flavor, low toxicity of this product. It can be soluble with water, soluble in most organic solvents such as ether and acetone. It can dissolve most organic and inorganic compounds, polar gases, natural and synthetic polymer compounds.
2. Chemical properties: relatively stable in neutral solution. After 8 hours of 4%of sodium hydroxide solution, 50%~ 70%of the hydrolysis occurred. Hydrolysis occurs in concentrates and generates 4-meth aminocyl acid. Due to the reaction of the cymbal base, it can generate ketone or sulfurboline.
3. In the existence of alkaline catalysts, it has the effect of an olefin, and an alkylated reaction occurs in the third place. N-methylporide is weakly alkaline and can generate salt hydrochloride. Formed an integrated with heavy metal salt, such as heating with nickel bromide to 150℃, generating NIBR2(C5H9ON)3, and a melting point of 105℃.
Production method: It is obtained by reaction from γ-butthochroditettes and methylemine. The first step of the reaction is to generate 4-hydroxyl-N-methyl-base amine for γ-butthlor and methylide, and the second step is then dehydrated to generate N-methylpidohone. The two-step reaction can be performed in a row in the tube reactor. The γ-butthole is 1: 1.15, the pressure is about 6MPa, and the temperature is 250 ° C. After the reaction is completed, the finished product is obtained by concentrated and decompression distillation. The income rate is 90%. If the kettle anti-ChemicalBook is produced, the amount of methylmine is 1.5-2.5 times the theoretical amount, and the laboratory preparation is used as an example. Among the 500ml hydropower, 2mol γ-butterotone and 4 Moore liquid are added to be closed and heated closed at 280 ° C for 4h. After cooling, release excessive methamine, distillation, collect 201-202 ° C distillation points, get about 180g of products, and the income shall be about 90%. Raw material consumption (kg/g) γ-butthoboretin 980 methyline (40%) 860.
Operation and storage:
1. Storage method
Store under the dry inert gas, keep the container sealed, and store in a cool and dry place.
2. Operation precautions
Avoid exposure: You need to obtain special guidance before use. Avoid contact with skin and eyes. Avoid inhalation of vapor and smoke. Do not approach the source of the fire. -No smoking. Take measures to prevent static accumulation.
3. Storage precautions
There is a cool place in storage. Keep the container closed and store in a dry and ventilated place. The open container must be carefully sealed and keep the vertical position to prevent leakage. Elimination of inflatable preservation is sensitive to humidity。
PACKAGING:200KG/DRUM
Post time: Mar-27-2023