Device for rapidly and efficiently reducing content of ammonium chloride in acetamidine hydrochloride mother liquor

Abstract

The invention discloses a device for rapidly and efficiently reducing the content of ammonium chloride in acetamidine hydrochloride mother liquor. The device comprises a tank, inside which multiple overflow filter panels are arranged in a staggered manner from top to bottom. The upper part of the tank is provided with a water inlet, the lower part of the tank is equipped with a water outlet, and the bottom is provided with a drainage port. The water outlet is arranged on the sidewall of the tank and positioned at the opposite side of the opening of the lowest overflow filter panel. By potential difference overflow, multistage settlement and filtering, fine ammonium chloride particles precipitated out of the acetamidine hydrochloride mother liquor are separated rapidly and efficiently. Thus, the content of ammonium chloride in an acetamidine hydrochloride product is effectively reduced. No power source is required, and energy is saved. In addition, the separation is rapid and efficient. Production period of the product can be shortened, corresponding capital investment is reduced, and great social benefit and economic benefit can be generated.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a device capable of rapidly and efficiently reducing the ammonium chloride content in acetamidine hydrochloride mother liquor in the production of acetamidine hydrochloride. Background technique [0002] In the existing production of acetamidine hydrochloride, due to the certain solubility of ammonium chloride in the ammoniated mother liquor, insufficient removal of the dissolved ammonium chloride in the ammoniated mother liquor will cause the ammonium chloride content of the concentrated mother liquor to exceed the industry requirement by 0.5% standard. Utilizing the characteristic that the solubility of ammonium chloride changes greatly with temperature, the ammonium chloride in the mother liquor can be fully separated, but since the ammonium chloride precipitated by cooling is suspended in the mother liquor in the form of very fine particles, it is difficult to use general sed...

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Problems solved by technology

[0002] In the existing production of acetamidine hydrochloride, due to the certain solubility of ammonium chloride in the ammoniated mother liquor, insufficient removal of the dissolved ammonium chloride in the ammoniated mother liquor will cause the ammonium chloride content of the concentrated mother liquor to exceed the industry requirement by 0.5% standard

Utilizing the characteristic that the solubility of ammonium chloride changes greatly with temperature, the ammonium chloride in the mother liquor can be fully separated, but since the ammonium chloride precipitated by cooling is suspended in the mother liquor in the form of very fine particles, it is difficult to use general sedimentation or filtration methods. It takes a long time to settle or invest in more labor for repeated centrifugation, and it also consumes more frozen brine

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