Abstract
The possibility of obtaining cyclopentanone by pyrolysis of calcium adipate at different temperatures was considered. The pyrolysis proceeded with the formation of cyclopentanone and cyclopentene. The use of metal salts and metal oxide catalysts for the dehydrogenation of lower alkanes makes it possible to increase the yields of the target products. The best results were achieved in the presence of a «K-16u» catalyst.
Highlights
In the period of development of the chemical and petrochemical industry, the main tasks are deep conversion, maximum use of feedstocks, and waste disposal
We study the thermal decomposition of adipic acid salts in the presence of metal oxides
The difference between the retention times of pure substances and the obtained samples is due to the presence of impurities in the technical products
Summary
In the period of development of the chemical and petrochemical industry, the main tasks are deep conversion, maximum use of feedstocks, and waste disposal. Water-acid effluents are formed in the process of obtaining caprolactam after isolation of the target product by washing the reaction mixture with water. Incineration is used for the disposal of these effluents They contain large amounts of oxygencontaining by-products. The possibility of obtaining cyclopentanone from byproducts of caprolactam production by pyrolysis of calcium salts of adipic acid was shown. We study the thermal decomposition of adipic acid salts in the presence of metal oxides. The raw material is adipic acid, isolated from the water-acid effluent of the caprolactam production. This work is aimed at improving the method for cyclopentanone production on the basis of water-acid effluents, studying the dependence of the yield of cyclopentanone on the process conditions, and investigating the possibility of using metal oxides as process catalysts
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