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Preparation method of special resin for decolorizing magnesium sulfate mother liquor

A technology of magnesium sulfate mother liquor and resin, applied in separation methods, chemical instruments and methods, solid adsorbent liquid separation, etc., can solve problems such as unsatisfactory effect, inability to produce resin, product backlog, etc., and avoid waste residue generation. Large, excellent decolorization effect, the effect of reducing decolorization cost

Active Publication Date: 2020-04-17
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Ingredients: The oil phase consists of 10g styrene, 25g divinylbenzene, 5g N-methylolacrylamide, 50g porogen cyclohexane, 0.5g initiator BPO, and the water phase consists of 5g dispersant polyethylene Alcohol, 300g distilled water;

[0028] (2) Polymerization reaction: add the water phase to the reaction vessel, heat up to 65°C and keep stirring for 15 minutes, then add the oil phase, continue to heat up to 80°C and keep stirring for 5 hours. After the reaction, naturally cool down to 35°C and filter out the microspheres ;

[0029] (3) Post-treatment: Rinse the microspheres with 500 mL of acetone to remove impurities and residual porogen, then wash with 500 mL of water to remove the acetone, and drain the water naturally at 25°C to obtain a macroporous adsorption resin.

Embodiment 2

[0031] The amount of N-methylolacrylamide in Example 1 was modified to 7g, and the rest of the operations were the same as in Example 1.

[0032] (1) Ingredients: The oil phase is composed of 10g styrene, 25g divinylbenzene, 7g N-methylolacrylamide, 50g porogen cyclohexane, 0.5g initiator BPO, and the water phase is composed of 5g dispersant polyethylene Alcohol, 300g distilled water;

[0033] (2) Polymerization reaction: add the water phase to the reaction vessel, heat up to 65°C and keep stirring for 15 minutes, then add the oil phase, continue to heat up to 80°C and keep stirring for 5 hours. After the reaction, naturally cool down to 35°C and filter out the microspheres ;

[0034] (3) Post-treatment: Rinse the microspheres with 500 mL of acetone to remove impurities and residual porogen, then wash with 500 mL of water to remove the acetone, and drain the water naturally at 25°C to obtain a macroporous adsorption resin.

Embodiment 3

[0036] The styrene in the embodiment 1 is replaced by an equivalent amount of cinnamic acid, and all the other operations are the same as in the embodiment 1.

[0037] (1) Ingredients: The oil phase is composed of 10g cinnamic acid, 25g divinylbenzene, 5g N-methylolacrylamide, 50g porogen cyclohexane, 0.5g initiator BPO, and the water phase is composed of 5g dispersant polyethylene Alcohol, 300g distilled water;

[0038] (2) Polymerization reaction: add the water phase to the reaction vessel, heat up to 65°C and keep stirring for 15 minutes, then add the oil phase, continue to heat up to 80°C and keep stirring for 5 hours. After the reaction, naturally cool down to 35°C and filter out the microspheres ;

[0039] (3) Post-treatment: Rinse the microspheres with 500 mL of acetone to remove impurities and residual porogen, then wash with 500 mL of water to remove the acetone, and drain the water naturally at 25°C to obtain a macroporous adsorption resin.

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PUM

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Abstract

The invention discloses a preparation method of a special resin for decolorizing a magnesium sulfate mother liquor, and relates to the technical field of decolorizing resin processing. The preparationmethod comprises the following preparation steps: (1) burdening; (2) a polymerization reaction; and (3) post-treatment. N-hydroxymethyl acrylamide is used as a cross-linking agent to introduce an amido group into a resin structure, so compared with macroporous adsorption resin prepared without adding N-hydroxymethyl acrylamide as a cross-linking agent, the prepared macroporous adsorption resin has the following advantages: a more excellent decolorization effect can be achieved on the magnesium sulfate mother liquor, pigments in the magnesium sulfate mother liquor can be efficiently removed, the resin can be recycled after being desorbed, and the decolorizing cost of the magnesium sulfate mother liquor is greatly reduced.

Description

Technical field: [0001] The invention relates to the technical field of decolorization resin processing, in particular to a preparation method of a special resin for magnesium sulfate mother liquor decolorization. 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, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/36C08F212/08C08F220/58C08F220/04C08J9/26B01J20/26B01J20/28B01J20/30B01D15/00
CPCC08F212/36C08J9/26B01J20/261B01J20/28021B01D15/00C08F212/08C08F220/58C08F220/04
Inventor 薛兆能
Owner 安徽皖东树脂科技有限公司
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