Dizotization reaction device for lemon yellow production

Abstract

The invention relates to the technical field of lemon yellow production, in particular to a diazotization reaction device for lemon yellow production, which comprises a diazotization reaction kettle and is characterized by further comprising a diazotization reaction bin arranged in the diazotization reaction kettle, and a filler opening is formed in the top of the diazotization reaction bin. The diazotization reaction of p-aminobenzene sulfonic acid can be completed through the diazotization reaction kettle, diazonium salt required by subsequent condensation coupling reaction is produced, the lifting material distribution plate capable of moving up and down is arranged in the diazotization reaction kettle, and the lifting material distribution plate retracts into the sealed storage bin during reaction, so that the diazotization reaction kettle is convenient to use. After the reaction is completed, the diazotization reaction bin is pulled by the center connecting column to move upwards and be embedded into the sealing embedding groove, the diazotization reaction bin is evenly divided into two parts, and therefore two parts of diazonium salt can be prepared at a time, then the diazonium salt is evenly divided through the lifting material distribution plate, and compared with traditional processing equipment, the diazotization reaction does not need to be repeatedly conducted twice, and the production efficiency is improved. And the safety and the efficiency of overall processing and production are higher.

Description

technical field [0001] The invention relates to the technical field of tartrazine production, in particular to a diazotization reaction device for tartrazine production. Background technique [0002] Lemon yellow, also known as tartrazine, is mostly used for the coloring of food and beverages, as well as for dyeing wool and silk and making lakes. Lemon yellow is an azo acid dye. The traditional production process is tartaric acid. However, its reaction conversion rate is low and the product purity is not high, so at present, the diazotization reaction is usually carried out by p-aminobenzenesulfonic acid, and then a condensation coupling reaction is carried out with DMAS for production; [0003] Patent application number CN201710043477.1 discloses a method for synthesizing food additive tartrazine, which provides a method for synthesizing food additive tartrazine, which mainly includes the following steps: a diazo process, a coupling process, a filter press process and Comp...

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Problems solved by technology

[0005] In view of this, the object of the present invention is to propose a diazotization reaction device for tartrazine production, to solve the problem of producing tartrazine at present and need to prepare two parts of diazonium salts for subsequent condensation reactions and coupling reactions to use respectively, but carry out The two preparations need to repeat the diazotization reaction twice, the risk is higher, and it is difficult to keep the same amount of material added and the concentration of the output material in the two diazotization reactions, and the uniformity is poor, which leads to the overall inconsistency in the production process. Issues with lower security and quality

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