Method for preparing conducting paint from waste glass in silver plating industry

A conductive coating and silver-plated glass technology, applied in the fields of environmental protection, material science, and chemistry, can solve the problems of secondary environmental pollution, impact on the ecological environment, and large energy consumption in the purification process, achieving high industrial added value and reducing primary pollution , prevent the effect of secondary pollution

Active Publication Date: 2010-02-24
东莞市惠德丽实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, due to the use of a large amount of strong acid solutions such as high-concentration nitric acid, and even the use of "aqua regia" with strong corrosive effects, it has caused more serious secondary environmental pollution and corroded equipment.
[0004] The silver chloride salt obtained by the above process needs to be decomposed and purified at a high temperature of 1000-1100°C to obtain silver with a purity of more than 99.9%, and the purification process consumes a lot of energy
[0005] The discharge of "three wastes" produced by chemical recovery of silver will seriously affect the ecological environment, induce geological disasters, cause changes in groundwater level and water quality, and even cause the accumulation of harmful components such as heavy metals, which will eventually threaten the human living environment
Chemical recovery of silver causes more serious environmental pollution, high energy consumption, corrosion of equipment, and low industrial profits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The main film-forming substance preparation method of epoxy-acrylic resin: add E-44 epoxy resin, and acetone or cyclohexanone into the disperser. The mass ratio of resin: acetone or cyclohexanone is 1:0.1-2.5, and diluted to obtain a mixed solution of epoxy resin and acetone. Add the solid acrylic resin with hydroxyl or carboxyl groups on the group according to the ratio of epoxy resin: solid acrylic resin mass ratio of 1: 1 to 10, start the disperser, the rotating speed is 2000 to 8000 rpm, and disperse and mix evenly at high speed to obtain Epoxy-acrylic resin is the main film-forming substance.

[0029] Add the main film-forming substance of the prepared epoxy-acrylic resin into a high-speed disperser, add acetone or cyclohexanone, and the consumption of acetone or cyclohexanone is 5-20% (mass percentage) of the above-mentioned initial consumption. Start the high-speed disperser to mix evenly, then add polyacrylic acid sodium salt dispersion aid with a mass percenta...

Embodiment 2

[0031] Synthesis of main film-forming substances of acrylic resin: add 2 to 10 parts by mass of isopropanol and 2 to 10 parts of butanediol monomethyl ether in the reaction kettle; add methyl methacrylate, ethyl methacrylate, methyl 1 to 6 parts of mixed monomers of butyl acrylate, acrylic acid and styrene, the mass ratio of each substance in the above mixed monomers is 1:0.5:0.3:0.1:1; then add 0.3 to 1.5 parts of the total mass of the mixed monomers % azobisisobutylcyanide initiator and 0.01-2.0% dodecyl mercaptan chain transfer agent, start stirring and mix evenly, raise the temperature to 40-85°C, react for 4-8 hours, and cool naturally after the reaction is completed The temperature is lowered to 30-40° C., and the material is discharged to obtain the main film-forming substance of the acrylic resin.

[0032] The main film-forming substance of the acrylic resin is added to a high-speed disperser, and 1 to 5% (mass percentage) of the main film-forming substance is added as...

Embodiment 3

[0034]Synthesis of the main film-forming substances of the water-based acrylic emulsion: add 2 to 10 parts (mass parts) of deionized water in the reaction kettle, add methyl methacrylate, ethyl methacrylate, butyl methacrylate, acrylic acid and benzene 2-10 parts of mixed monomers such as ethylene, the mass ratio is 1:0.5:0.3:0.1:1; add 1-5% dodecylsulfonate and 0.1-1% OP-10 of the total mass of mixed monomers Surfactant, add 0.3-1.5% azobisisobutylcyanide initiator and 0.01-2.0% dodecyl mercaptan chain transfer agent of the total mass of mixed monomers, start stirring and mixing evenly, and gradually raise the temperature to 40- React at 85°C for 3-8 hours, and cool down to 30-40°C after the reaction to obtain the main film-forming substance of the acrylic resin emulsion with a solid content of 40-50%, which is discharged.

[0035] Add 1 to 5% of the total mass of the emulsion to the acrylic acid emulsion, and a polyacrylic acid sodium salt dispersing aid aqueous solution wit...

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Abstract

The invention relates to the fields of chemistry, environmental protection and material science, in particular to a method for preparing a conducting paint by cleaning and recycling waste glass in silver plating industry. The method comprises the following two steps: the recycling and the surface treatment of waste glass in silver plating industry, and the preparation of the conducting paint. Therecycling and the treatment of the waste glass in silver plating industry are realized in such a way that: using the glass discarded by factories in silver plating industry as the main raw material; after recycling, washing and pulverizing according to classifications, wetting with a surfactant, and meanwhile, coupling with a coupling agent. The preparation of the conducting paint is realized in such a way that: adding the main film forming material into a high-speed dispersion machine; adding a solvent, a dispersion assistant and the like; adding silver-plating glass powder; adding metal andnonmetal filling materials, a defoamer, a thixotropic agent, a thickening agent and other assistants, evenly dispersing and mixing, and filtering to obtain the conducting paint. The method reduces theprimary environmental pollution caused by waste glass in silver plating industry, prevents the more serious secondary environmental pollution caused by acid liquor in the process of recycling silverby a chemical method, and has the advantages of no corrosion on equipment and low energy consumption.

Description

technical field [0001] The invention relates to the fields of chemistry, environmental protection and material science, in particular to a method for preparing conductive paint based on cleaning and recycling waste glass in the silver-plating industry. technical background [0002] In the fields of manufacturing industries such as glass mirror making, thermos bottle production, architectural glass and Christmas stationery, a layer of metallic silver is usually plated on the glass surface by electroless plating, which is the so-called silver-coated glass. During the production and use of silver-coated glass, a large amount of silver-containing industrial waste glass will be produced. About 20,000-30,000 tons of silver-containing industrial waste glass are produced by related industries every year. On the one hand, these industrial solid wastes have attracted much attention because of the precious metal silver, and on the other hand, the loss of heavy metal silver has caused ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/14C09D133/12C09D125/14C09D7/12C09D5/24
Inventor 巫辉李月常韩凤志余劲罗全郭丽萍
Owner 东莞市惠德丽实业有限公司
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