A kind of determination method of yellow brown esterification liquid

Abstract

The invention discloses a method for measuring yellow brown esterification liquid, which comprises: weighing about 0.4 g of a sample into a 400 mL beaker, adding 10 mL glacial acetic acid and 100 mL sodium acetate solution, and then adding 50 mL water to keep the solution temperature at 5 " Below C, add 50 mL of p-nitroaniline diazonium salt droplet, stir at (0-5) °C for 30 min, and perform coupling titration with 2,4-diaminotoluene standard titration solution. When the intersection of the coupling test solution on the medium-speed qualitative filter paper and the diluted p-nitroaniline diazonium salt solution (1:5), the intersection is yellow, and the intersection with the H acid solution is colorless, that is as the end point; record the volume V1 of the 2,4-diaminotoluene standard titration solution consumed. At the same time, do a blank test; after the test, put the beaker into the 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 brown esterification liquid. Background technique [0002] In the dye processing process, the yellow-brown esterification solution 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 brown esterified liquid were measured; due to the strong viscosity of the yellow brown esterified liquid, it was easy to leave residues in the container after the measurement of the yellow brown esterified liquid. Intensity; the production of dyes is continuous. If the container cannot be cleaned in time, the test of the yellow-brown esterification solution cannot be carried out continuously, which in turn affects the production efficiency of dyes and slows down the production progress of the factory. SUMMARY OF THE INVENTION [0003] In ...

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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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