Method for continuously manufacturing potassium diformate

Abstract

The invention provides a method for continuously manufacturing potassium diformate. The method is characterized in that carbon dioxide gas serves as a regulating agent, formic acid and potassium hydroxide serve as raw materials, potassium diformate is synthesized in one step, and no gas is emitted in the whole reaction process. In the production process, solid potassium hydroxide is prepared into a solution, a certain quantity of the potassium hydroxide solution is obtained, and the carbon dioxide gas is introduced into the potassium hydroxide solution to prepare a potassium hydroxide and potassium carbonate mixed solution; potassium ions and formic acid with the molar ratio of 1:(2.0-3.0) are added in the mixed solution, and stirring reaction is conducted; in the reaction process, reaction temperature is kept to be 55-75 DEG C; the carbon dioxide gas generated due to reaction of formic acid and the mixed solution is recycled and reacts with a newly introduced potassium hydroxide solution; the product of the primary reaction is taken out, secondary reaction continues, reaction temperature is kept to be 55-75 DEG C, and secondary reaction lasts for 1-2.5 hours. The whole reaction is mild, controllable and free of emission, continuous production is achieved, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for producing potassium diformate, in particular to a synthesis method in which carbon dioxide gas is used as a regulator to make the whole reaction mild and controllable. Background technique [0002] Potassium diformate is a new type of feed additive. As a substitute for antibiotic growth promoters, potassium diformate was approved by the European Union as early as 2001. It is the first non-antibiotic approved by the European Union to replace antibiotic growth promoters. Feed additives. In order to ensure food safety, since 2006, the European Union will completely prohibit the use of auxin antibiotics in feed as feed additives. Potassium diformate is an acidifying agent. Compared with acidifying agents such as formic acid, potassium diformate is convenient to transport, and has low corrosion and irritation. Studies have found that potassium diformate, as a feed additive, can increase the feed intake of livestock an...

AI Technical Summary

Problems solved by technology

[0004] Chinese invention patent CN1844074 introduces the method for preparing potassium diformate with formic acid and potassium oxide as raw materials, but because the source of potassium oxide used in this method is less, the price is high, and potassium oxide cannot be directly stored in the air, resulting in this method High cost and limited industrial application

The U.S. patent of invention US6137005 introduces the method for preparing potassium diformate by the reaction of formic acid and potassium formate. Although the reaction yield of this method is high, the price of potassium formate, the raw material for the reaction, is high, making this method difficult to carry out industrial application.

Chinese patent CN1428325 has introduced the method that solid potassium carbonate reacts with formic acid to synthesize potassium diformate, but the resulting product yield is low, only about 50%

However, the reaction process takes a long time and the process is complicated, and it is necessary to increase the separation steps of the process product methanol, which greatly increases the equipment investment and loss.

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