Raw materials for synthesizing glycine and method for improving glycine synthesis process

Abstract

The invention provides raw materials for synthesizing glycine and a method for improving glycine synthesis process. In the method, the glycine is synthesized by using industrial products of solid ammonium chloroacetate and ammonium bicarbonate as raw materials, water as a solvent and urotropine as a catalyst. The method has the advantages of lower reaction temperature, a few side reaction, a few impurities in the products of glycine, high quality and over 90 percent synthesis rate; and the method also has the advantages of cyclic utilization of mother liquor, less consumption of the catalyst, easy operation, high safety, low corrosiveness and little pollution.

Description

technical field [0001] The invention relates to an improved method of glycine synthesis raw material and process, which belongs to the field of chemical industry. Background technique [0002] The traditional synthesis of glycine is to use chloroacetic acid and liquid ammonia to carry out ammonolysis reaction in the presence of urotropine. However, this method has high reaction temperature, long time, many side reactions, and low yield; the accumulation of a large amount of impurities in the mother liquor makes it difficult to recycle the mother liquor, resulting in waste of resources; it also causes serious pollution to the environment; while the product quality is also very poor , if the refined production cost is higher. Chinese patent CN1136035A is exactly a traditional glycine synthesis process, and the product yield is only 80%, which means that one-fifth of the resources will be wasted. The preparation method of glycine disclosed in Chinese patent CN1410417A is a me...

AI Technical Summary

Problems solved by technology

However, this method has high reaction temperature, long time, many side reactions, and low yield; the accumulation of a large amount of impurities in the mother liquor makes it difficult to recycle the mother liquor, resulting in waste of resources; it also causes serious pollution to the environment; while the product quality is also very poor , if the refined production cost is higher

Chinese patent CN1136035A is a traditional glycine synthesis process, and the product yield is only 80%, which means that one-fifth of the resources must be wasted

The introduction of alcohol solvent will bring the trouble of alcohol recovery, and methanol evaporation loss is also very large (about 20-30%), and also causes environmental pollution, and the flammability and toxicity of methanol also cause safety hazards to production