Process for producing J acid through mother liquor recycling and pressurized alkali fusion

A technology of alkali melting and mother liquor, applied in the preparation of alkali metal sulfite/sulfite, magnesium sulfate, sulfonic acid, etc., can solve the problems of difficult processing and high processing cost, achieve simple operation method, reduce material coking, and have Universal effect

Pending Publication Date: 2021-09-24
SHANDONG CHUANGLAN YAOSHI ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing production process of J-acid is to use Turbine’s acid as raw material, through sulfonation, hydrolysis, and then neutralization, alkali-melting acidification to obtain 1 ton of J-acid, producing more than ten tons of waste sulfuric aci

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 362 parts of 20% fuming sulfuric acid to the sulfonation kettle, add 90 parts of tunic acid at 40°C, keep warm at 35-40°C for 4 hours, then raise the temperature to 105-110°C and keep warm for 8 hours, add 450 parts of water (or amino J acid washing water ), hydrolyzed at 110-120° C. for 3 hours, cooled and filtered to obtain 252 parts of amino acid filter cake and 631 parts of filtrate. Add 200 parts of water to wash the filter cake, 257 parts of washing water, 195 parts of filter cake, 54.8% of amino acid content.

[0037] Add 160 parts of 48% potassium hydroxide to the filter cake to neutralize to pH=8-9, 389 parts of filtrate, add 60 parts of water to the filter cake, and wash with 102 parts of water. 389 parts of filtrate (amino acid content 26.2%), add 118 parts of 48% potassium hydroxide after merging, concentrate to amino acid content 35%. Raise the temperature to 190-195°C, alkali fusion for 4 hours, dilute the alkali fusion material with 450 parts of J pi...

Embodiment 2

[0041] Add 730 parts of 20% fuming sulfuric acid into the sulfonation kettle, add 180 parts of Tuccinic acid (content 96.19%) at 40°C, keep the temperature at 35-40°C for 4 hours, then raise the temperature to 105-110°C for 6 hours, add 850 parts of water Last batch of J pickling water (adding water to make up if insufficient), hydrolyzed for 3 hours at 110-120° C., cooled and filtered to obtain 1252 parts of mother liquor and 345 parts of filter cake (62.3% amino acid content).

[0042] 345 parts of filter cake, add sodium hydroxide to adjust pH=8-9, cool down and filter, wash the filter cake with water, wash with 196 parts of water, concentrate 757 parts of filtrate with 208 parts of 48% sodium hydroxide, and concentrate to obtain amino acid content of 35% Above, heated to 195-205 ℃ for 5 hours, the pressure is 0.45Mpa.

[0043] After the alkali fusion is finished, dilute with 1000 parts of washing water of J acid once, acidify and cool down and filter with amino J acid moth...

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PUM

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Abstract

The invention belongs to the field of J acid preparation, and relates to a process for producing J acid through mother liquor recycling and pressurized alkali fusion; wherein tobias acid is sulfonated and then diluted with water instead of washing water containing sodium sulfate, it is avoided that sodium sulfate is contained in dilute sulfuric acid of amino J acid mother liquor, the amino J acid mother liquor can be used for producing magnesium sulfate, liquid-phase pressurized alkali fusion enables the reaction to be more thorough; and the material coking is avoided, the yield is improved, and the unit consumption of tobias acid is reduced by over 150kg compared with that of the traditional process. The strip liquor obtained by combining and extracting the amino J acid mother liquor is used for producing the water reducing agent, so that the materials are fully utilized.

Description

technical field [0001] The invention belongs to the technical field of J-acid preparation, and in particular relates to a process for producing J-acid by recycling mother liquor and pressurized alkali fusion. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] J acid. The scientific name is 2-amino-5-naphthol-7 sulfonic acid, which is an important dye intermediate and is mainly used to prepare direct Qinglian R, direct light fast blue FRL, direct light fast gray ZBL, direct copper salt blue ZR, direct acid purple , direct peach red, direct copper dyed navy blue, fast blue BZR, direct bay red GB, and reactive scarlet, purple, bright orange X-GN, gray, grass green, red brown a...

Claims

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Application Information

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IPC IPC(8): C07C309/50C07C303/22C07C309/47C07C303/04C01D5/00C01F5/40C04B24/20C04B103/30
CPCC07C303/22C07C303/04C07C309/50C01D5/00C01F5/40C04B24/20C04B2103/302C07C309/47
Inventor 王在军代兴远杨海军任帅昌石艳
Owner SHANDONG CHUANGLAN YAOSHI ENVIRONMENTAL PROTECTION TECH CO LTD
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