A processing process of a maternal liquid pigmentation during the production of magnesium sulfate

A magnesium sulfate mother liquor and treatment process technology, applied in magnesium sulfate, ion exchange treatment device, ion exchange regeneration and other directions, can solve problems such as solid waste, secondary pollution, unsatisfactory effect, etc., achieve simple process operation, reduce solid waste The amount of production, the effect of pigment removal is good

Active Publication Date: 2022-04-22
安徽皖东树脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After many cycles, the color of the mother liquor has become dark black, which brings some pigment into the product, and it will become heavier and heavier, which seriously affects the sales of the product, resulting in a large backlog of products, which in turn leads to a large backlog of waste acid , so that the resin cannot be produced
Conventional pigment removal methods generally adopt activated carbon method and diatomite method in industry, but the effect is not satisfactory, and a large amount of solid waste will be generated, causing secondary pollution

Method used

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  • A processing process of a maternal liquid pigmentation during the production of magnesium sulfate
  • A processing process of a maternal liquid pigmentation during the production of magnesium sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Resin column preparation: use the wet method to pack the column, put 100g of macroporous adsorption resin WD1200 into the exchange column with a diameter of 2cm and a height of 80cm to obtain a resin column;

[0031] (2) Pigment adsorption: pump 500mL of magnesium sulfate mother liquor into the resin column, and the magnesium sulfate mother liquor passes through the resin column at a flow rate of 5BV / h and collects the eluate. Washing the resin column and collecting the eluent, combining the eluent, and the eluent sleeve is used in the treatment of waste sulfuric acid produced by ion exchange resin processing to prepare industrial grade magnesium sulfate;

[0032] (3) Pigment analysis: 300mL of methanol passes through the resin column at a flow rate of 2BV / h and collects the eluent. The eluent is distilled to recover methanol for the next analysis. The regenerated resin is used to continue to process the next batch of mother liquor.

Embodiment 2

[0034] (1) Resin column preparation: use the wet method to pack the column, put 100g of macroporous adsorption resin WD1200 into the exchange column with a diameter of 2cm and a height of 80cm to obtain a resin column;

[0035] (2) Pigment adsorption: pump 500mL magnesium sulfate mother liquor into the resin column through the pump, the magnesium sulfate mother liquor passes through the resin column according to the flow rate of 4BV / h and collects the eluate, after the magnesium sulfate mother liquor has passed through the resin column completely, wash it with 100mL water Washing the resin column and collecting the eluent, combining the eluent, and the eluent sleeve is used in the treatment of waste sulfuric acid produced by ion exchange resin processing to prepare industrial grade magnesium sulfate;

[0036] (3) Pigment analysis: 300mL of methanol passes through the resin column at a flow rate of 2BV / h and collects the eluent. The eluent is distilled to recover methanol for th...

Embodiment 3

[0038] (1) Resin column preparation: use the wet method to pack the column, put 100g of macroporous adsorption resin WD1200 into the exchange column with a diameter of 2cm and a height of 80cm to obtain a resin column;

[0039] (2) Pigment adsorption: Add 0.2g cocoic acid monoethanolamide to 500mL magnesium sulfate mother liquor, mix well, pump into the resin column, magnesium sulfate mother liquor passes through the resin column according to the flow rate of 4BV / h and collect the eluent , after the mother liquor of magnesium sulfate passes through the resin column, wash the resin column with 100mL water and collect the eluent, combine the eluent, and the eluent is used in the treatment of waste sulfuric acid produced by ion exchange resin processing to prepare industrial grade magnesium sulfate ;

[0040] (3) Pigment analysis: 300mL methanol is passed through the resin column at a flow rate of 2BV / h and the eluate is collected. The eluate is left to stand for 1h and then filt...

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Abstract

The invention discloses a process for treating mother liquid pigment in magnesium sulfate production, relates to the technical field of chemical decolorization, and comprises the following process steps: (1) resin column preparation; (2) pigment adsorption; (3) pigment analysis. The present invention adopts the resin method, first absorbing the organic pigment in the magnesium sulfate mother liquor to the resin, and then decomposing it with a solvent, recovering the solvent, and reusing the resin; not only greatly reducing the amount of solid waste generated, but also simple process operation, the magnesium sulfate mother liquor Excellent depigmentation effect.

Description

Technical field: [0001] The invention relates to the technical field of chemical decolorization, in particular to a process for treating mother liquid pigment in magnesium sulfate production. Background technique: [0002] The waste sulfuric acid produced in the production process of ion exchange resin is a hazardous waste, and generally manufacturers use it to react with magnesium oxide to produce industrial grade magnesium sulfate for disposal. As an important chemical raw material, magnesium sulfate is widely used in many fields, especially in the fields of fertilizer, medicine, papermaking, building materials, etc., but the requirement for the color of magnesium sulfate is still very high. [0003] In the process of producing magnesium sulfate from waste acid, a large amount of pigment will be deposited in the mother liquor, and the mother liquor must be applied repeatedly. After many cycles, the color of the mother liquor has become dark black, which brings some pigmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/40B01D15/08C07C213/06C07C219/08
CPCC01F5/40B01D15/08C07C213/06C07C219/08
Inventor 薛兆能
Owner 安徽皖东树脂科技有限公司
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