Method for recovering manganese dioxide from milbemycin oxime filter residues

Abstract

The invention discloses a method for recovering manganese dioxide from milbemycin oxime filter residues, which belongs to the technical field of manganese dioxide recovery and sequentially uses ethanol and deionized water to perform top washing on the manganese dioxide filter residues. According to the method, manganese dioxide can be effectively recycled from the filter residues generated in milbemycin oxime production through a manganese dioxide oxidation method, acetone and residual products in the filter residues can be effectively removed, the manganese dioxide is stopped from continuingto react with the products, combustible gas in the filter residues is removed, and potential safety hazards caused by reaction heat release are thoroughly avoided; meanwhile, the obtained manganese dioxide still has certain oxidation activity and can be reutilized after being recycled and treated, the production cost of enterprises is effectively reduced, the used ethyl alcohol and deionized waterare used for top washing, the raw materials are easy to obtain and low in price, the ethyl alcohol and the deionized water are non-toxic, and secondary pollution cannot be caused.

Description

technical field [0001] The invention belongs to the technical field of manganese dioxide recovery, and in particular relates to a method for recovering manganese dioxide from the filter residue produced from milbexime. Background technique [0002] Milbemycin is an oxime derivative of milbemycin A3 and A4, a macrolide anti-endoparasite drug. Milbexime has a broad-spectrum anti-parasitic effect, and has a good killing effect on internal and external parasites, especially nematodes and arthropods. It is usually used to prevent dirofilariasis and control dogs and cats caused by nematodes and hookworms. Diseases and canine whipworm disease, etc. [0003] In the process of preparing milbexime products, it is necessary to use a large amount of active manganese dioxide oxidizing agent to oxidize the intermediate product milbeketone to generate milbexime. In the oxidation process, the solvent is acetone, and heat will be released during the reaction. After the reaction is complete...

AI Technical Summary

Problems solved by technology

The manganese dioxide in the filter residue still has a certain oxidation activity, and some products and acetone liquid remain in the filter residue. The manganese dioxide in the filter residue continues to react with the residual material liquid and undergoes heat release, and it is easy to ignite the acetone gas with the exothermic reaction. Phenomenon, there is a serious safety hazard

At the same time, manganese dioxide is used in a large amount as an oxidant, and the price of manganese dioxide is relatively high

If the manganese dioxide used in the production of milbexime cannot be effectively recovered, it will not only cause potential safety hazards, but also increase the production cost of the enterprise

But the recovery method that is commonly used in manganese dioxide is not suitable for reclaiming manganese dioxide from the filter residue of producing milbexime at present, how to provide a kind of method that is specially used in reclaiming manganese dioxide from the filter residue of producing milbexime, becomes the present Problems to be solved