Preparation technology of dye disperse yellow 54#

Abstract

The invention discloses a preparation technology of dye disperse yellow 54#. The preparation technology comprises the steps that a thermal reaction is conducted on 2-methyl-3-hydroxyquinoline or 2-methyl-3-hydroxyquinoline-4-carboxylic acid and phthalic anhydride at the temperature of 200+ / -20 DEG C, after the reaction is completed, materials are put into hot water for dilution while the materials are hot, after dilution is completed, stirring and cooling are conducted to reach the temperature of 80+ / -10 DEG C, the materials are subjected to grinding through a colloid grinder, the pH value of the materials is adjusted to be between 7.5 and 9.0, thermal insulation is conducted at the temperature of 50-100 DEG C for 30 min or above, filtering and washing are conducted, and a target product is obtained. According to the preparation technology of the dye disperse yellow 54#, high-boiling-point solvent trichlorobenzene is not adopted in the reaction system, the phenomena of caking and balling of the product are greatly relieved, the aftertreatment process is easier, the whole technology is greener and more environmentally friendly, the grinding process of the colloid grinder is added for the diluted materials, the phenomena of caking and balling of the product are further significantly relieved, and the purity of the prepared target product reaches up to 98%-99.5%.

Description

technical field [0001] The invention relates to a preparation process of dye disperse yellow, in particular to a preparation process of dye disperse yellow 54#, which belongs to the field of dye preparation. Background technique [0002] Dye Disperse Yellow 54#, also known as Disperse Yellow E3G, is mainly used for polyester fiber dyeing. It is suitable for high temperature and high pressure method, normal temperature dyeing and normal temperature carrier method dyeing or printing. It has good level dyeing performance, high light fastness, and can be dyed single It can also be mixed with blue to dye bright fruit green. There are two main synthetic routes: (1) 2-methyl-3-hydroxyquinoline and phthalic anhydride in the presence of high boiling point solvents such as trichlorobenzene, at 200 ° C Keep it warm for 8 hours. After the reaction, the solvent is evaporated by water vapor or part of the solvent is evaporated by high vacuum, and then the solvent is evaporated by water va...

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Problems solved by technology

[0006] 3. In the steam distillation process, chlorobenzene oil-soluble organic solvents will shrink and condense into balls when in contact with water. Due to the high solubility of products and raw materials in organic solvents, an oil-in-water phenomenon will be formed, although the organic solvent will eventually It is evaporated, but during the shrinkage process, it will cause the material to agglomerate and ball, that is, the small spherical material mixed in the material is common in production, and the spherical material usually contains impurities in the original material