METHOD OF PRODUCTION OF ACETIC ACID (VERSIONS), BUBBLE COLUMN FOR THE METHOD REALIZATION Russian patent published in 2008 - IPC C07C51/12 C07C53/08 B01J8/24 

FIELD: chemical industry; other industries; methods and devices for production of acetic acid.

SUBSTANCE: invention is pertaining to the production process of the acetic acid by carbonylation of methanol by carbon monoxide in the bubble reactor with fluidized heterogeneous catalyst. Carbonylation reaction is conducted at concentration of the solid catalyst of no less than 100 kg/m³ in terms of the volume of the reaction system. Catalyst is formed with the help vinylpyridine resin with the complex of rhodium deposited on it. Partial pressure of the carbon monoxide in the reactor is between 1.0 and 2.5 MPa, at that the degree of exhaustion of carbon monoxide is between 3 and 15 % of the theoretical reaction volume of carbon monoxide and reduced speed of the liquid is in the interval between 0.2 and 1.0 m/s. Promoter is methyl iodide, and acetic acid and methyl acetate are used in the capacity of the dissolvent. Concentration of water in the reactor makes from 2 up to 10 mass %. The bubble cylindrical reactor column used for realization of the method has the ratio its length L to the diameter D of no less than 8 and is equipped with the external line of circulation and the heat exchanger, which is built in the line of circulation. Besides, the bubble column has the holes used for injection of carbon monoxide, which are located at least on two levels, and also has the narrowed section in the lower part of the cylindrical reactor with the inner diameter from 30 up to 70 % from the rest part of the cylindrical reactor. The hole for injection of carbon monoxide is located in the upper part of the narrowed section for fluidization of the solid catalyst, while other hole for injection of carbon monoxide is located near to the coupling of the reactor and the outer line of circulation located on the bottom of the narrow section for separation and fluidization of the solid catalyst in the outer line of circulation. Technical result of the invention is improvement of the technological form of the production process with the increased yield of the end product.

EFFECT: invention ensures improvement of the technological form of the production process with the increased yield of the end product.

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