Manufacturing method of nitrile and corresponding amine thereof

Abstract

The invention relates to a manufacturing method of nitrile. Compared with the prior art, the manufacturing method has the characteristics of significantly reduced using amount of an ammonia source, low environmental pressure, low energy consumption, low production cost, high purity and yield of a nitrile product and the like, and nitrile with a more complex structure can be obtained. The invention also relates to a method for manufacturing corresponding amine from nitrile.

Description

technical field [0001] The invention relates to a process for the production of nitriles and a process for producing corresponding amines from the nitriles. Background technique [0002] Nitrile compounds are a class of organic compounds containing cyano group (-CN), and are important intermediates in organic synthesis. Due to the high reactivity of the cyano group, the corresponding amine compounds can be prepared through hydrogenation reaction, which is an important raw material for the manufacture of medicines, pesticides, dyes, spices, surfactants, etc., and is widely used in various fields of the national economy . Among them, the alicyclic monohydric nitrile is a very important chemical intermediate, and it and its derivatives have a very wide range of uses, and one of its derivatives, the alicyclic monohydric amine, is widely used in dyes, medicines, and curing agents due to its special properties. and so on have a wide range of applications. [0003] The preparati...

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Problems solved by technology

[0005] But, the inventor of the present invention finds by research, and prior art is when producing nitrile by carboxylic acid ammoniation method, in order to make ammoniation reaction fully carry out, require Ammonia gas is continuously fed into the reaction system as a raw material during the entire ammoniation process of carboxylic acid or within a long reaction time, so the amount of ammonia gas is huge, resulting in the actual amount of ammonia gas far exceeding the amount required for the ammoniation reaction , which may be tens of millions of times the actual reaction requirement, resulting in extremely low ammonia utilization

In addition, due to the extremely low utilization rate of ammonia, the ammonification reaction produces a large amount of waste ammonia water but cannot be recycled. After discharge, it will cause huge pressure on the environment, which is inconsistent with the current green production concept.

Moreover, since the ammoniation reaction of this technology adopts an overall higher reaction temperature (for example, exceeding 300° C.) and an overall longer reaction time, the energy consumption is higher, resulting in higher production costs, and there are also reactions during the reaction process. Severe material loss (for example, the reaction material is entrained out of the reaction system due to continuous feeding of ammonia gas flow) and many side reactions, which make it difficult to effectively improve the quality and yield of nitrile products, etc.

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