Double decomposition precipitation transformation production method of potassium citrate

Abstract

The invention discloses a double decomposition precipitation conversion production method of potassium citrate, which is characterized by comprising the following steps: (1) citric acid filtrate is prepared; (2) calcium carbonate is added into the citric acid filtrate for conducting neutralization reaction so as to prepare solid calcium citrate; (3) the impurities are removed by washing; (4) double decomposition reaction is carried out on the washed calcium citrate and potassium carbonate, and then calcium carbonate and potassium citrate solution is generated; (5) by filtering separation, the calcium carbonate solid and the potassium citrate solution are obtained, later the calcium carbonate is returned to the step 2 for re-use; (6) decolorization is conducted; and (7) the potassium citrate solid is prepared. The invention only uses two types of raw materials of pharmaceutical-grade powdered activated carbon and food-grade potassium carbonate, thereby greatly reducing the type of raw materials, and simultaneously produces no solid and gas waste, and significantly simplifies the production process of the potassium citrate, lowers the production cost and improves the economic benefit.

Description

technical field [0001] The invention relates to a method for producing potassium citrate, in particular to a method for producing potassium citrate by double decomposition precipitation conversion. Background technique [0002] Potassium citrate is a translucent crystal or white powder, which can be used as buffer, chelating agent, stabilizer, antioxidant, emulsifier, flavoring agent in the food industry, and can be used as an anticoagulant, hypoglycemic agent in the pharmaceutical industry The treatment of potassium disease and alkaline urine is also widely used in construction, chemical industry, washing and other industries. In recent years, its demand has been increasing at an annual rate of 5%-7%. The traditional potassium citrate production process generally adopts the calcium salt method. The process is: 1. Preparation of citric acid fermentation filtrate: crushing corn, liquefying sugar, adding Aspergillus niger and fermenting in a fermenter under forced ventilation....

AI Technical Summary

Problems solved by technology

Its shortcoming is: in this process, every ton of potassium citrate finished product needs to consume 1.0 tons of calcium carbonate, 0.98 tons of concentration is 98% sulfuric acid, 0.2 tons of concentration is 30% hydrochloric acid and 0.3 tons of concentration is 30% % liquid sodium hydroxide, meanwhile, will produce 1.8 tons of calcium sulfate waste, about 20 tons of exchange column acid-base waste water and a large amount of sulfur dioxide gas in the production process, this calcium sulfate crystal becomes dilute paste, is difficult to utilize, has nowhere to store, Seriously restricts the development of citric acid and its salt industry; at the same time, the sulfur dioxide produced by the acid hydrolysis reaction cannot be collected, and the operating conditions of the workers are extremely harsh, which will also cause a large degree of pollution to the atmosphere, resulting in a substantial increase in production costs and reducing the production cost of enterprises. economic benefits

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