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Green and environment-friendly chromium-removing ceramic water reducing agent

A ceramic water reducer, a green and environmentally friendly technology, applied in the field of ceramic production additives, can solve the problems of hexavalent chromium pollution, no hexavalent chromium removal improvement, etc., and achieve the effects of reducing potential hazards, good synergy, and simple operation

Active Publication Date: 2022-04-12
湖南省博鼎建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water reducer of the above-mentioned patents mainly optimizes the fluidity, and does not improve the removal of hexavalent chromium in the ceramic mortar at the same time, and pollution caused by hexavalent chromium may occur in practical applications

Method used

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  • Green and environment-friendly chromium-removing ceramic water reducing agent
  • Green and environment-friendly chromium-removing ceramic water reducing agent
  • Green and environment-friendly chromium-removing ceramic water reducing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A green and environment-friendly chromium-removing ceramic water-reducer, the raw materials and proportions are: 500g of polycarboxylate mother liquor, 100g of triethanolamine, 100g of sodium carboxymethylcellulose, and 20g of graphene.

[0033]The preparation method of described polycarboxylic acid mother liquor is: at 50 ℃, with 15g poly(ethylene glycol) methyl ether methacrylate, 5g sodium allyl sulfonate, 0.4g ammonium persulfate, in rotating speed 350r Dissolve in 150g water at 1 / min to obtain mixed system I; then add 10g acrylic acid, 0.15g mercaptoacetic acid, and 1g tri(ethylene glycol) divinyl ether to mixed system I, stir at 50°C at 350r / min , After 4 hours of polymerization reaction, cool naturally at 25°C to obtain a mixed system II; adjust the pH of the mixed system II to 7.5 with 30% aqueous sodium hydroxide solution and water to obtain a polycarboxylate mother liquor.

Embodiment 2

[0035] A green and environment-friendly chromium-removing ceramic water-reducer, the raw materials and proportions are: 500g of polycarboxylate mother liquor, 100g of triethanolamine, 100g of sodium carboxymethylcellulose, and 20g of sodium alginate.

[0036] The preparation method of described polycarboxylic acid mother liquor is: at 50 ℃, with 15g poly(ethylene glycol) methyl ether methacrylate, 5g sodium allyl sulfonate, 0.4g ammonium persulfate, in rotating speed 350r Dissolve in 150g water at 1 / min to obtain mixed system I; then add 10g acrylic acid, 0.15g mercaptoacetic acid, and 1g tri(ethylene glycol) divinyl ether to mixed system I, stir at 50°C at 350r / min , After 4 hours of polymerization reaction, cool naturally at 25°C to obtain a mixed system II; adjust the pH of the mixed system II to 7.5 with 30% aqueous sodium hydroxide solution and water to obtain a polycarboxylate mother liquor.

Embodiment 3

[0038] A green and environment-friendly chromium-removing ceramic water-reducer, its raw materials and proportions are: 500g of polycarboxylate mother liquor, 100g of triethanolamine, 100g of sodium carboxymethylcellulose, 4g of graphene, and 16g of sodium alginate.

[0039] The preparation method of described polycarboxylic acid mother liquor is: at 50 ℃, with 15g poly(ethylene glycol) methyl ether methacrylate, 5g sodium allyl sulfonate, 0.4g ammonium persulfate, in rotating speed 350r Dissolve in 150g water at 1 / min to obtain mixed system I; then add 10g acrylic acid, 0.15g mercaptoacetic acid, and 1g tri(ethylene glycol) divinyl ether to mixed system I, stir at 50°C at 350r / min , After 4 hours of polymerization reaction, cool naturally at 25°C to obtain a mixed system II; adjust the pH of the mixed system II to 7.5 with 30% aqueous sodium hydroxide solution and water to obtain a polycarboxylate mother liquor.

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Abstract

The invention discloses a green and environment-friendly chromium-removing ceramic water reducer which comprises the following raw materials in parts by weight: 40-50 parts of polycarboxylate mother liquor, 5-10 parts of a grinding aid, 5-10 parts of a plasticizer and 1-5 parts of a reinforcing agent. According to the invention, free radical polymerization is carried out in an aqueous solution environment at a relatively low temperature to prepare a polycarboxylate mother solution, and then modified sodium alginate is added to prepare the green and environment-friendly chromium-removing ceramic water reducer. The water reducing agent is reasonable in component compatibility, a good synergistic effect is generated, the water reducing rate, grinding aiding performance and plasticity of ceramic mortar are effectively improved, meanwhile, the modified sodium alginate can convert polluting hexavalent chromium into trivalent chromium through adsorption and reduction, and therefore potential hazards of hexavalent chromium in the ceramic mortar are reduced.

Description

technical field [0001] The invention belongs to the technical field of ceramic production aids, and in particular relates to a green and environment-friendly chromium-removing ceramic water reducer. Background technique [0002] The processing of ceramic mortar will introduce raw materials such as binders and other additives or pigments. The above-mentioned raw materials often contain heavy metal chromium elements; among them, hexavalent chromium elements are harmful to the environment and biology, and hexavalent chromium elements are easily absorbed by the human body. And it can invade the human body through digestion, respiratory tract, skin and mucous membranes, and there will be a risk of cancer in severe cases. [0003] Patent CN 106916250 A discloses a preparation method of a reinforced N-methylolacrylamide copolymer ceramic water reducer, which greatly increases the repeating unit "methylolamide" in the N-methylolacrylamide copolymer The capillary force between the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/632C04B35/634C04B35/636C04B35/63C08F290/06C08F228/02C08F220/06C08F216/14C08B37/04
Inventor 罗伍平
Owner 湖南省博鼎建材有限公司
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