Method for layered silicate modified silica sol

A layered silicate, silica sol technology, applied in the directions of silicate, aluminum silicate, chemical instruments and methods, etc., can solve the problems of high price, large waste liquid, large energy consumption, etc., and achieves low cost, high technology Simple and compatible effect

Active Publication Date: 2017-12-19
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Application Information

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Problems solved by technology

[0008] To sum up, in the prior art, in the modification of silica sol, either need to use expensive organic solvents and alkoxysilanes, or just simple physical mixing, and the modification of metal ions depends on repeated ion exchange column, high energy consumption, and a lot of waste liquid, which is not ideal

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  • Method for layered silicate modified silica sol
  • Method for layered silicate modified silica sol

Examples

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Effect test

Embodiment 1

[0047] Dilute water glass with modulus 3.24 of 3401 from Qingdao Dongyue Soda Soda Factory with deionized water to a solid content of 3%, and pass it through a cation exchange resin to obtain an orthosilicic acid solution. Add 1M sulfuric acid to the solution to adjust its pH to 1. After aging for 72 hours at room temperature, let it pass through the anion exchange resin first, and then immediately pass through the cation exchange resin to obtain an acidic activated orthosilicic acid solution.

[0048] Add 3% water glass to the acidic activated ortho silicic acid solution to adjust its pH to 10 to obtain an alkaline activated ortho silicic acid solution. Take 250ml of alkaline activated orthosilicic acid solution as the base solution, use the constant liquid level method to control the liquid temperature to 85°C, and add acidic activated orthosilicic acid solution dropwise at a rate of 0.6ml / min, after 5 hours And after adding 200ml of acidic activated orthosilicic acid soluti...

Embodiment 2

[0053] Dilute water glass with modulus 3.24 of 3401 from Qingdao Dongyue Soda Soda Factory with deionized water to a solid content of 5%, and pass it through a cation exchange resin to obtain an orthosilicic acid solution. Add 1M hydrochloric acid to the solution to adjust its pH to 2. After aging at room temperature for 48 hours, let it pass through the anion exchange resin first, and then immediately pass through the cation exchange resin to obtain an acidic activated orthosilicic acid solution.

[0054] Add 1M sodium hydroxide solution to the acidic activated orthosilicic acid solution to adjust its pH to 8. Take 250ml of alkaline activated orthosilicic acid solution as the base solution, use the constant liquid level method to control the liquid temperature to 65°C, and add acidic activated orthosilicic acid solution dropwise at a rate of 0.4ml / min, after 8 hours And after adding 200ml of acidic activated orthosilicic acid solution dropwise, light blue opalescence appeared...

Embodiment 3

[0058] Dilute water glass with modulus 3.24 of 3401 from Qingdao Dongyue Soda Soda Factory with deionized water to a solid content of 4%, and pass it through a cation exchange resin to obtain an orthosilicic acid solution. Add 1M nitric acid to the solution to adjust its pH to 2. After aging at room temperature for 48 hours, let it pass through the anion exchange resin first, and then immediately pass through the cation exchange resin to obtain an acidic activated orthosilicic acid solution.

[0059] Add 1M ammonia solution to the acidic activated orthosilicic acid solution to adjust its pH to 10. Take 250ml of alkaline activated orthosilicic acid solution as the base solution, use the constant liquid level method to control the liquid temperature to 70°C, and add acidic activated orthosilicic acid solution to it at a rate of 0.4ml / min, after 6 hours And after adding 150ml of acidic activated orthosilicic acid solution dropwise, light blue opalescence appeared in the bottom li...

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Abstract

The invention provides a method for a layered silicate modified silica sol, wherein a dilute orthosilicic acid solution, an acidic activated orthosilicic acid solution, an alkaline orthosilicic acid solution, an active crystal seed sol, a first-stage growth silica sol and a first-stage growth silica sol / layered silicate suspension are prepared so as to finally obtain the layered silicate modified silica sol. According to the present invention, the cheap water glass is used as the raw material, and all the processes are carried out in the water phase without the organic solvents, such that the production cost is substantially reduced, the working environment is safe and health, and the method has advantages of simple process, low cost, and environment protection.

Description

technical field [0001] The invention relates to a method for modifying layered silicate silica sol, in particular to a method for producing layered silicate modified silica sol by adopting a one-pot method, which belongs to the technical field of chemical industry. Background technique [0002] Silica sol is a colloidal solution in which amorphous silica particles are dispersed in water or an organic solvent. As an important inorganic polymer material, it has a large specific surface area, good dispersion, good adhesion, and good fire resistance and heat insulation. , Good insulation and other excellent characteristics, so it is widely used in machinery manufacturing, petrochemical, special ceramics, textiles, papermaking, coatings, water treatment, catalysts, medicine and electronics industries and other fields. [0003] Although ordinary silica sol has many excellent properties and has been widely used, with the deepening of research and application, silica sol with a sing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/141C01B33/26
CPCC01B33/141C01B33/26C01P2004/04
Inventor 张剑吕毅李洪深赵英民
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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