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Preparation for boron modified granular silicon sol

A silica sol, boron modification technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problem of no high-concentration modified particulate silica sol production technology.

Inactive Publication Date: 2005-05-11
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high secrecy of the preparation technology of particulate silica sol used in papermaking in foreign countries, there is little research on modified particulate silica sol for papermaking in China. So far, no domestic manufacturer has mastered the production of high-concentration modified particulate silica sol for papermaking. technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, acidify water glass with strongly acidic cation exchange resin, add boride after alkalization and ripening to modify, ultrafiltration and concentration to prepare boron-modified particulate silica sol:

[0016] a. Set the concentration to 8% (SiO 2 weight content) of water glass, the pump pressure passes through the strongly acidic cation exchange column to obtain the acidic silica sol with a pH value of 1.2;

[0017] b. Add 18% of 8% water glass to alkalize, then heat to 40°C, keep it warm for 30 minutes for aging, and cool to 16°C (normal temperature);

[0018] c. Add 1.25ml / g (as SiO 2 0.1mol / L magnesium borate modification of weight content meter);

[0019] d. Concentrate to 15% by ultrafiltration;

[0020] e. Stir and add stabilizer polyvinyl alcohol in an amount of 0.05%.

[0021] The obtained boron modified particulate silica sol has a specific surface area of ​​839.68m 2 / g, particle size about 3.25nm, S-value (S-value indicates the degree of ...

Embodiment 2

[0023] Embodiment 2, acidify water glass with strongly acidic cation exchange resin, add boride to modify during alkalization, prepare the method for boron modified particle silica sol after ripening, ultrafiltration and concentration:

[0024] a. Set the concentration to 5.5% (SiO 2 weight content) of water glass, the pump pressure passes through the strongly acidic cation exchange column to obtain the acidic silica sol with a pH value of 4.1;

[0025] b. Add 6% of 5.5% water glass for alkalization, while adding 3.2ml / g (as SiO 2 The 1mol / L potassium borate modification of weight content meter);

[0026] c. Heating to 37°C and holding for 30 minutes for curing;

[0027] d. concentrated to 23% by ultrafiltration;

[0028] e. Stir and add stabilizer sodium hexametaphosphate, the dosage is 0.1%.

[0029] The obtained boron modified particulate silica sol has a specific surface area of ​​1052.21m 2 / g, the particle size is about 2.59nm, the S-value is 43.66%, the degree of m...

Embodiment 3

[0031] Embodiment 3, acidify water glass with strongly acidic cation exchange resin, after alkalization, add boride to modify, ripen, ultrafiltration concentrates the method for preparing boron-modified particulate silica sol:

[0032] a. Set the concentration to 7% (SiO 2 weight content) of water glass, the pump pressure passes through the strongly acidic cation exchange column to obtain the acidic silica sol with a pH value of 3.2;

[0033] b. Heat to 50°C, add 0.36ml / g (as SiO 2 The NaOH (1mol / L) alkalization of weight content meter);

[0034] c. Add 2.5ml / g (as SiO 2 0.5mol / L sodium borosilicate) in 0.5mol / L sodium borosilicate, modified and matured at 50°C for 30 minutes;

[0035] d. concentrated to 16% by ultrafiltration;

[0036] e. Stir and add stabilizer sodium polyacrylate, the dosage is 1%.

[0037] The obtained boron modified particulate silica sol has a specific surface area of ​​894.92m 2 / g, particle size about 3.05nm, S-value 12.80%, degree of modificatio...

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Abstract

A production of boron modified particle silica sol is disclosed. It is carried out by acidizing soluble glass by strong acid cation exchange resin, alkalifying, curing, and ultra-filtering concentrating to obtain high specific superficial area particle silica sol. It can be used in various paper pulp, paper maker and paper application with pH between 4-10.

Description

1. Technical field [0001] The invention belongs to the technical field of preparation of chemical auxiliary agents for papermaking in inorganic chemistry. 2. Background technology [0002] In the paper industry, the formation of paper sheets and the quality of water filtration, the effective use of other chemical additives, good retention of fillers and fiber fines, and zero discharge of papermaking wastewater all require efficient retention aids. filter system to achieve. There are many types of existing paper retention and drainage systems, which can generally be divided into single-component, two-component and particulate retention and drainage systems. [0003] With the development of paper machines towards high-speed, large-scale and neutral papermaking, in the production process of paper and paperboard, traditional one-component or two-component retention and drainage systems are used to improve retention and drainage performance. Satisfactory results have not been o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/146
Inventor 马金霞彭毓秀李忠正
Owner NANJING FORESTRY UNIV
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