Comprehensive processing method and apparatus for mother solution in production of glucurolactone

Abstract

The invention discloses a method for comprehensively treating and utilizing a mother solution in the production of glucurolactone and a device using the method. The mother solution is sent to a distillation kettle, is heated and is evaporated with a mixed solution of ester, ethanol and acetic acid till the Baume degree of the mother solution is between 40 and 50; the mixed solution is condensed through a condenser and enters a storage tank for standby; the mixed solution is sent to a neutralization and condensation kettle, is added with pure alkali or liquid alkali, is neutralized till the PH value is between 5 and 7 around, is heated and is evaporated with thin ethanol till the Baume degree is between 20 and 40; the mixed solution is cooled, crystallized and dehydrated to obtain sodium acetate; the thin ethanol enters a concentration tower, is concentrated and is supplied to the production of glucurolactone; and the residual mother solution in the distillation kettle is put to a thick mother solution tank and is directly used for producing oxalic acid. The treatment method simplifies a process, saves labor, has low cost, small energy consumption and convenient operation, can fully recycle organisms in the mother solution and can change waste to valuable.

Description

Technical field: [0001] The invention relates to the technical field of industrial waste liquid treatment, and more specifically, provides a comprehensive treatment method of mother liquor in the production of glucurolactone and a device for realizing the method. Background technique: [0002] Glucurolactone is a drug for the treatment of liver diseases in the liver. It can combine with certain poisons in the liver to detoxify and reduce the activity of liver amylase, increase liver glycogen and reduce fat storage. This product also constitutes the body Components of connective tissue. It is used for the adjuvant treatment of acute and chronic hepatitis, cirrhosis, arthritis and rheumatism; it can also be used for food or drug poisoning and detoxification. It is mostly used as food and beverage additives abroad. [0003] The mother liquor of glucurolactone is the waste liquid produced in the production process of glucurolactone. For every ton of glucurolactone produced, about 8 t...

AI Technical Summary

Problems solved by technology

This method requires large investment in treatment facilities and very high operating costs.

Some manufacturers send (sell) the mother liquor to the oxalic acid factory for direct use in the production of oxalic acid, in which acetic acid, ethanol, ethyl acetate, etc. are oxidized into carbon dioxide and water, which not only causes waste, but also consumes a large amount of nitric acid

A patent (publication number CN1752520A) reports that the mother liquor of glucuronide is atomized and burned, and the combustion heat is directly used as a heat source, but its heat utilization value is far lower than that of acetic acid, ethanol, ethyl acetate and starch sugar, etc. the value of

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