Method for synthesizing sodium diacetate crystal in one step

Abstract

The invention relates to a method for synthesizing a preservative and antistaling agent, and in particular relates to a method for synthesizing a sodium diacetate crystal in one step. The following raw materials are adopted in percent by weight: 70.4-72.4% of glacial acetic acid, 10.8-12.0% of ionic membrane method caustic soda flake and 16.5-18.6% of anhydrous sodium carbonate. The synthesis steps are as follows: (1) mixing the ionic membrane method caustic soda flake with the anhydrous sodium carbonate, slowly adding the glacial acetic acid and then naturally heating, controlling total reaction time to be 30-50 minutes, and controlling maximum reaction temperature to be 65-85 DEG C; and (2) cooling the temperature below 50-60 DEG C after the reaction is completed, and discharging. By applying the method provided by the invention, solid-liquid separation equipment, drying equipment and a reaction heating device are eliminated, a sodium diacetate crystal one-step synthesis method is realized, process is simple and safe, energy is saved, production cost can be greatly reduced, yield of the product reaches up to more than 97%, product quality is easy to control, and the standard of FAO / WHO (Food and Agriculture Organization / World Health Organization) is met.

Description

technical field

[0001] The present invention relates to a kind of synthetic method of antiseptic, antistaling agent, in particular to a kind of synthetic method of sodium diacetate crystal. Background technique

[0002] Sodium diacetate has been widely used in food, feed, and fruit preservation and preservation at home and abroad. It has been approved by the US Food and Drug Administration FDA and registered as a food additive. As early as 1977, the Food and Agriculture Organization of the United Nations (FAO) and the World Health Organization (WHO) officially approved the use of sodium diacetate preservatives in food and feed. my country has also approved the production and use of this product, and it has been included in the national standard "Classification and Code of Food Additives" in 1990. The classification code of sodium diacetate is: 017, 013". It has been used as food additive and feed additive abroad for more than 50 years. It is a safe, reliable, efficient and ...

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