A kind of preparation method of long carbon chain cyano acid

Abstract

The invention relates to a preparation method of long carbon chain cyano acid, which belongs to the technical field of organic synthesis. First put the dibasic acid and catalyst into the reaction kettle, replace it with nitrogen, heat it to a molten state, start the cooling liquid of the packed tower, and slowly feed ammonia gas; then start the gas circulation pump, and automatically replenish nitrogen during the process, and the reaction time is 1 ~3 hours, and then quantitatively complete the required ammonia gas. The present invention adopts specific equipment, a specific process flow, and sets strict process conditions to prepare cyanoacid products, especially like 8-cyanoctanoic acid and 9-cyano nonanoic acid, which are synthetic nylon 9 and Front intermediate of nylon 10.

Description

technical field

[0001] The invention relates to a preparation method of long carbon chain cyano acid, in particular to the application of 8-cyanoctanoic acid and 9-cyano nonanoic acid in the preparation of single-gauge nylon, which belongs to the technical field of organic synthesis. Background technique

[0002] Polyamide resin is an important variety of polyamide engineering plastics. It has the characteristics of good flexibility, high mechanical strength, low density, acid and alkali corrosion resistance, and excellent electrical insulation properties. Because of its excellent performance, it is widely used in many fields such as automobile industry, medical equipment, electronic appliances, military industry and so on.

[0003] At present, there are many varieties of nylon for production and industrial application, such as double-number nylon 66, nylon 610, nylon 612, nylon 1010, nylon 1012, nylon 1212, etc., single-number nylon 6, nylon 11, nylon 12, etc. And there ar...

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