A kind of method utilizing synthetic triacetone amine process by-product to prepare acetone

Abstract

The invention belongs to the technical field of preparation of acetone and particularly discloses a method of preparing acetone from byproducts of a triacetonamine synthetic process. According to themain technical scheme, the byproducts of the triacetonamine synthetic process are introduced into a high tank; a catalyst and water are added into a reactor; the reactor is started to allow stirring,and the reactor is heated to 60-100 DEG C; the high tank dropwise adds the products into the reactor; a condenser is started to provide cooling water, and regenerated acetone is collected from a storage tank; after the reaction ends, the regenerated acetone is directly added into a main triacetonamine production line as a synthetic material; after water is supplemented to the reactor, next acetoneregeneration is entered. The method of preparing acetone from byproducts of the triacetonamine synthetic process has the advantages that byproduct utilization value is improved and by the full process, triacetonamine can be synthesized from acetone under higher yield.

Description

technical field [0001] The invention belongs to the technical field of preparation of acetone, and in particular relates to a method for preparing acetone by using a by-product in the process of synthesizing triacetone amine. Background technique [0002] The chemical name of triacetonamine is 2,2,6,6-tetramethylpiperidone, which is an important hindered amine light stabilizer intermediate and pharmaceutical intermediate, especially in the field of hindered amine light stabilizer, triacetonamine It is the only parent nucleus of the hindered amine light stabilizer piperidine derivatives, and is an important raw material for the synthesis of tetramethylpiperidinol, tetramethylpiperidinamine and polymerization inhibitor 702. [0003] The industrialized production of triacetone amine uses acetone and ammonia as raw materials and is synthesized under the action of an acidic catalyst. The synthesis of triacetone amine produces compounds including mesityl oxide, diacetone alcohol,...

AI Technical Summary

Problems solved by technology

These by-products will be separated in the crude triacetone amine refining process, and recycled to the next batch to be mixed with acetone and used as raw materials for the production of triacetone amine; The optimization conditions are different, especially there is a big difference between acetone and acetone dimer, and between acetone and acetone trimer, so that the synthesis process conditions cannot meet the conditions of acetone to triacetone amine, dimer to triacetone amine and trimer to the optimal process condition of triacetone amine, and under the maximum yield technology that satisfies the acetone to triacetone amine operational route, can directly affect dimer and trimer to the reaction conversion of triacetone amine Yield, resulting in reduced utilization of dimer and trimer components in the mixed feedstock (series of by-products)

[0004] In addition, because the process cannot match the optimal yield conditions of different reaction starting materials at the same time, the above-mentioned by-products will often be used as fuel oil, directly causing environmental pollution and other social problems

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