Synthetic process of azo disperse dye monomer compound
A technology of disperse dyes and synthesis process, which is applied in the direction of azo dyes, monoazo dyes, organic dyes, etc., which can solve the problems of complex production process, low production efficiency, low single-pass conversion rate of reactants, etc., and achieve the goal of overcoming many processes , the effect of improving work efficiency
Inactive Publication Date: 2016-05-18
QINGDAO SHOUTAI AGRI SCI & TECH CO LTD
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Problems solved by technology
In the current synthesis process method of dye monomer compound, the synthesis method is too single, the process flow is not easy to implement, the purity of the finished fuel monomer compound produced is low, the single-pass conversion rate of reactant is low, the production process is complicated, the production efficiency is low and the cost is low. High cost, not suitable for mass production
Method used
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Experimental program
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Effect test
Embodiment
[0011] The synthesis technique of the azo disperse dye monomer compound of the present embodiment comprises the following steps:
[0012] (1) Diazotizing the compound of formula (II) with nitrosyl sulfuric acid under acidic conditions, controlling the temperature at 20°C; in formula (II), X1 and X2 are independently hydrogen or halogen;
[0013] (2) Add water, emulsifier and the compound represented by formula (III) into the coupling reactor, control the temperature at 29°C, stir and beat; in formula (II), R1 is hydrogen or C1-C4 alkanoylamino, R2 , R3 are independently C1-C4 alkyl or substituted alkyl, and the substituents of the substituted alkyl are cyano, C1-C4 alkanoyloxy or benzoyloxy;
[0014] (3) The solution of the diazonium salt prepared in step (1) is evenly added into the coupling reactor from under the liquid, stirred to the end of the reaction, filtered with suction, washed to neutrality, and dried to obtain the azo disperse dye monomer compound.
[0015] The s...
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The invention discloses a synthetic process of an azo disperse dye monomer compound. The synthetic process includes the following steps: 1) performing diazotization to a compound (II) with nitrosyl sulfuric acid with temperature controlled to be 6-20 DEG C; 2) adding water, an emulsifier and a compound (III) into a coupling reactor, and performing stir-pulping at 16-29 DEG C; and 3) adding the diazonium salt from the bottom of the liquid uniformly into the coupling reactor, stirring the mixture until termination of the reaction, and performing suction filtration, washing the product to neutralization, and drying the product to obtain the azo disperse dye monomer compound. In the invention, the synthetic process is improved, wherein addition of large amount of ice or frozen salt water to decrease the temperature is not required any more to achieve demand, in the technical scheme, through heat release during the coupling reaction and dilution on the diazonium salt, the temperature of the coupling reaction gradually reaches 20-45 DEG C, so that the process is greatly reduced in cost on the basis of the equal quality and effect, and also greatly reduces energy consumption of preparing the cooling mediums, such as the ice, frozen salt water and the like.
Description
technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a synthesis process of an azo disperse dye monomer compound. Background technique [0002] The synthesis process of the dye monomer compound at least includes stirring, cooling, beating, emulsifying and other processes. In the current synthesis process method of dye monomer compound, the synthesis method is too single, the process flow is not easy to implement, the purity of the finished fuel monomer compound produced is low, the single-pass conversion rate of reactant is low, the production process is complicated, the production efficiency is low and the cost is low. The cost is high and not suitable for mass production. Contents of the invention [0003] In order to overcome the above-mentioned technical problems existing in the prior art field, the object of the present invention is to provide a synthesis process of azo disperse dye monomer compou...
Claims
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IPC IPC(8): C09B29/00
Inventor 张晶
Owner QINGDAO SHOUTAI AGRI SCI & TECH CO LTD