Determination method of yellow and brown esterifying liquid

Abstract

The invention discloses a determination method of yellow and brown esterifying liquid. The method comprises: weighing about 0.4 g of a sample, placing in a 400 mL beaker, adding 10 mL of glacial acetic acid and 100 mL of a sodium acetate solution, adding 50 mL of water, maintaining the temperature of the solution below 5 DEG C, adding 50 mL of a paranitroaniline diazonium salt falling liquid, stirring for 30 min at a temperature of 0-5 DEG C, carrying out coupling titration by using a 2, 4-diaminotoluene standard titration solution, when approaching an end point, performing a wetting ring test, and when the intersection of a wetting ring of a coupling test solution on the medium-speed qualitative filter paper and a wetting ring of the diluted p-nitroaniline diazonium salt solution (1: 5) is yellow and the intersection of the wetting ring of the coupling test solution and a wetting ring of an H acid solution is colorless, determining the end point; recording a volume V1 of the consumed 2, 4-diaminotoluene standard titration solution, and simultaneously performing a blank test; and after the test is finished, putting a beaker into an ultrasonic cleaner for cleaning.

Description

technical field [0001] The invention belongs to the technical field of dye material detection, in particular to a method for measuring yellow palm esterification liquid. Background technique [0002] In the dye processing process, the yellow palm esterification liquid is the main raw material of the orange 30 filter cake coupling process, and its performance directly affects the quality and yield of the product. The properties of the palm esterification liquid were measured; due to the strong viscosity of the yellow palm esterification liquid, the yellow palm esterification liquid is easy to leave residue in the container after the measurement, and the container that is not cleaned can not be used continuously, which increases the labor of the post-test work Intensity: The production of dyestuffs is continuous. If the container cannot be cleaned in time, the test of the yellow palm esterification solution cannot be carried out continuously, which affects the production effic...

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Problems solved by technology

[0002] In the dye processing process, the yellow palm esterification liquid is the main raw material of the orange 30 filter cake coupling process, and its performance directly affects the quality and yield of the product. The properties of the palm esterification liquid were measured; due to the strong viscosity of the yellow palm esterification liquid, the yellow palm esterification liquid is easy to leave residue in the container after the measurement, and the container that is not cleaned up cannot continue to be used, which increases the labor of the post-test work Intensity; the production of dyestuffs is continuous. If the container cannot be cleaned in time, the test of the yellow brown esterification solution cannot be carried out continuously, which affects the production efficiency of the dyestuff and slows down the production progress of the factory.

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