Recovery comprehensive utilization method of disperse red 60 byproduct

Abstract

The invention discloses a recovery method and comprehensive utilization of disperse red 60 by-products, belonging to the comprehensive treatment technical field of the chemical dyes and auxiliaries by-products, which comprises the following process steps: (1) acidification: the condensation mother liquid water obtained by condensation reaction of the 1-amino-2- bromine-4- hydroxyl anthraquinone and the phenol is acidi-regulated to the acid pH value, and sulfate or hydrochloride is added for acidulating; (2) standing stratification: the acidulated mother liquid water is kept still for more than a half hour, upper solution of disperse red sixty with phenol and dissolved in the phenol, and lower solution with potassium bromide and phenol are obtained; (3) separation: the lower solution is put in the potassium bromide catch trough, and then is derived into the potassium bromide extraction boiler; (4) extraction: organic solvent is put into the potassium bromide extraction boiler, after extracting, standing and stratification, the upper layer is phenol which can dissolve in the organic solvent, the lower layer is potassium bromide solution. The recovery method and comprehensive utilization of disperse red 60 by-products has the advantages of reducing production cost and environmental pollution effectively.

Description

technical field [0001] The invention relates to a recovery and comprehensive utilization method of by-products of disperse red 60, which belongs to the technical field of comprehensive treatment of by-products of chemical dyes and chemicals. Background technique [0002] In the current production process of Disperse Red 60, the condensed mother liquor obtained by condensation reaction of 1-amino-4-hydroxyanthraquinone and phenol, which is filtered, contains a large amount of phenol, Disperse Red 60 and potassium bromide. Existing treatment of mother liquor water is to reclaim phenol through vacuum distillation, still contain phenol, disperse red 60, potassium bromide etc. in the distillation residue, product yield is low, phenol consumption is big, vacuum distillation process is complicated, energy consumption is big, The single-step condensation yield is only about 85-88%, the production cost is relatively high, a large amount of hazardous solid waste is generated, and the ...

AI Technical Summary

Problems solved by technology

Existing treatment of mother liquor water is to reclaim phenol through vacuum distillation, still contain phenol, disperse red 60, potassium bromide etc. in the distillation residue, product yield is low, phenol consumption is big, vacuum distillation process is complicated, energy consumption is big, The single-step condensation yield is only about 85-88%, the production cost is relatively high, and a large amount of hazardous solid waste is generated, which causes great environmental pollution.

There is also methanol added after the condensation reaction for separation, and the product quality has improved, but because the condensation reaction itself has not been improved, the yield is still low, the unit consumption of phenol is still high, and the boiling point of methanol is too low and is flammable. Explosive dangerous goods, there are serious safety hazards in the use process, and in the invention patent of CN 101003691A, 1-amino-2-bromo-4-hydroxyanthraquinone is used as a wet product filter cake as a condensation raw material, and solvents and antioxidants are also added , although the problem of drying the hydrolyzate has been solved, the comprehensive recovery and utilization of phenol in mother liquor water, disperse red 60 soluble in phenol, and potassium bromide cannot be solved, and the problem of high unit consumption of phenol and low yield cannot be solved. The status quo of environmental pollution

And the recovery and comprehensive utilization of the by-product potassium bromide in the condensation mother liquor water have not been reported.