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Process for preparing acetamides compounds

An amine compound and compound technology, applied in the field of producing acetamide compounds, can solve the problems of high cost of raw materials, affecting product market competitiveness, increasing product cost of acetamide compounds, etc., and achieving the effect of reducing production costs

Inactive Publication Date: 2005-09-07
浙江交通科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual production of this method, due to the high cost of raw materials, the cost of the acetamide compound product produced increases accordingly, thereby affecting the market competitiveness of this type of product

Method used

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  • Process for preparing acetamides compounds
  • Process for preparing acetamides compounds
  • Process for preparing acetamides compounds

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] With the mixture 1 of 1.1 tons of methyl acetate and methyl alcohol (methyl acetate 80%, methyl alcohol 20%) and 0.53 tons of amine compound (dimethylamine) 2 are raw materials, reaction temperature 150-170 ℃ and pressure 0.35-0.45Mpa, Add 0.125 tons of sodium methoxide methanol solution catalyst 3, enter the mixer 4, and mix thoroughly to form a uniform liquid mixture. Then enter the heater 16, heat it to about 120°C and then send it to the reactor 5 to react to generate dimethylacetamide and methanol, and the reacted mixture (dimethylacetamide, methanol, methyl acetate, sodium methoxide and catalyst residue) Enter the filter 14, filter and remove the catalyst residue 15. Filtrate enters evaporator 6, and the top of evaporator 6 obtains acetamide compound (dimethylacetamide), methyl acetate and methanol, and amine compound (dimethylamine) 7, and the bottom of evaporator 6 obtains catalyst and some High boilers 17, return to mixer 4. Acetamide compound (dimethylacetam...

example 2

[0026] Use 1.47 tons of methyl acetate and methanol mixture 1 (methyl acetate 60%, methanol 40%) and 0.53 tons of amine compound (dimethylamine) 2 as raw materials, the following steps are the same as Example 1, and finally obtain 1 ton of dimethyl Acetamide product, and 1 ton of methanol product.

example 3

[0028] Using 0.98 tons of methyl acetate and methanol mixture 1 (methyl acetate 90%, methanol 10%) and 0.53 tons of amine compound (dimethylamine) 2 as raw materials, the following steps are the same as Example 1, and finally 1 ton of dimethyl Acetamide product, and 0.53 tons of methanol product.

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Abstract

The invention discloses a process for preparing acetamides compounds which comprises, using amines compounds of acetogenin as raw material, mixing under a predetermined temperature and pressure, carrying out amidation and separating, wherein the mixture of methyl acetate and methyl alcohol is employed for replacing acetic acid derivative to react with the amines compounds.

Description

technical field [0001] The invention belongs to a production method of a chemical product, in particular to a method for preparing such as dimethylacetamide {CH 3 CON(CH 3 ) 2} and other acetamide compounds. Background technique [0002] N-N-dimethylacetamide (N, N-Dimethylacetamide) is one of the acetamide compounds. It is a colorless transparent liquid, which can be mixed with water, alcohol, ether and other organic solvents. It is a polar solvent with molecular formula: CH 3 CON(CH 3 ) 2 , [0003] structural formula [0004] [0005] It has the characteristics of high boiling point and flash point, good thermal and chemical stability, and low toxicity, and is very superior as a solvent. It is mainly used as reaction solvent for drug synthesis, solvent for synthetic fiber spinning and synthetic resin, solvent for photosensitive chemical coloring agent, etc. [0006] Before the present invention was made, there were mainly three methods for synthesizing acetami...

Claims

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Application Information

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IPC IPC(8): C07C231/10C07C233/05
Inventor 周强王成习戴广林黄素英
Owner 浙江交通科技股份有限公司