The traditional process of producing Disodium Succinate from succinic acid mainly uses water as the medium. Firstly, the solid succinic acid is reacted with sodium hydroxide or sodium carbonate in an aqueous solution, and then filtered, concentrated, and spray-dried to obtain sodium succinate. Another method for producing sodium succinate is to carry out neutralization reaction with succinic acid and sodium hydroxide or sodium carbonate in aqueous solution, vacuum concentration, cooling crystallization, and the method of filtering and drying.
The above-mentioned process mainly has the following defects: (1) waste water and waste residues are produced in the production process; (2) a large amount of energy is required in the product drying process; (3) the yield is low and the production cost is high; (4) the investment is large and takes up The plant area is large.
Provide a kind of method that utilizes solid succinic acid, sodium hydroxide and/or sodium carbonate as main raw material to synthesize sodium succinate below, and this method can overcome the defect that exists in the above-mentioned traditional technology.
The technical scheme of the present invention is a method for synthesizing Disodium Succinate, which uses succinic acid and sodium hydroxide and/or sodium carbonate as raw materials, and is characterized in that: all reactants are in a solid state, mixed and ground for chemical reaction in a solid state to generate Solid product, the reaction does not require heating, and does not produce “three wastes”.
The present invention utilizes the technological process of solid phase reaction to synthesize Disodium Succinate as follows:
A method for the synthesis of sodium succinate by solid-phase reaction is characterized in that: utilize succinic acid and solid base as raw material, put all succinic acid into solid-phase reactor and grind for 10～180 minutes, according to reactor or reactant The amount is different, and the solid alkali is added in 2 to 6 times for grinding, and the solid alkali and the succinic acid directly undergo a chemical reaction, and the temperature is controlled to be 50 ° C ~ 70 ° C, and the pressure is controlled to be 0.005Mpa ~ 0. IMpa; The solid base is sodium carbonate or sodium hydroxide.