Process for mfg. water resisting type large pore spherical silica gel

A technology of spherical silica gel and a manufacturing method, applied in the field of silica gel manufacturing, can solve the problems of cracking, uneven pore size distribution, unstable skeleton structure of macroporous silica gel, etc., achieve stable pore size distribution, shorten production cycle, and improve non-explosion in contact with water. rate effect

Active Publication Date: 2007-09-19
李永兆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a method for manufacturing water-resistant macroporous spherical silica gel, which can solve the problems of unstable macroporous silica gel skeleton structure, uneven pore size distribution, and bursting when encountering water.

Method used

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  • Process for mfg. water resisting type large pore spherical silica gel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The manufacturing method process of the macroporous spherical silica gel of the present invention is as follows:

[0015] 1. Sodium silicate reacts with dilute sulfuric acid to prepare gel balls;

[0016] 2. Aging treatment process: 2 hours at 25°C;

[0017] 3. Steaming treatment process: steam pressure: 0.1MPa, steaming time 8 hours;

[0018] 4. Drying treatment process: the drying temperature is 120℃, and the time is 10 hours;

[0019] 5. The burning treatment process is: burning temperature is 500℃, burning time is 100min;

[0020] 6. Acid bubble treatment process: use 1-4% sulfuric acid for acid bubble treatment, and the acid bubble time is 2 hours;

[0021] 7. Washing treatment process: wash with water at 55°C until the pH value is 5-7.5;

[0022] 8. Drying treatment process: the drying temperature is 120°C and the time is 10 hours.

Embodiment 2

[0024] The manufacturing method process of the macroporous spherical silica gel of the present invention is as follows:

[0025] 1. Sodium silicate reacts with dilute sulfuric acid to prepare gel balls;

[0026] 2. Aging treatment process: 30℃ for 8 hours;

[0027] 3. Steam treatment process: steam pressure: 0.3MPa, steaming time 6 hours;

[0028] 4. Drying treatment process: the drying temperature is 200℃, and the time is 40 hours;

[0029] 5. The burning treatment process is: burning temperature is 600℃, burning time is 80min;

[0030] 6. Acid bubble treatment process: use 1-4% sulfuric acid for acid bubble treatment, and the acid bubble time is 8 hours;

[0031] 7. Washing treatment process: wash with water at 40-45°C until the pH value is 5-7.5;

[0032] 8. Drying treatment process: the drying temperature is 200°C and the time is 50 hours.

Embodiment 3

[0034] The manufacturing method process of the macroporous spherical silica gel of the present invention is as follows:

[0035] 1. Sodium silicate reacts with dilute sulfuric acid to prepare gel balls;

[0036] 2. Aging treatment process: 27℃ for 5 hours;

[0037] 3. Steaming treatment process: steam pressure: 0.4MPa, steaming time 8 hours;

[0038] 4. Drying treatment process: the drying temperature is 150℃, and the time is 30 hours;

[0039] 5. The burning treatment process is: burning temperature is 700℃, burning time is 80min;

[0040] 6. Acid bubble treatment process: use 1-4% sulfuric acid for acid bubble treatment, and the acid bubble time is 5 hours;

[0041] 7. Washing treatment process: wash with 45-50 ℃ water until the pH value is 5-7.5;

[0042] 8. Drying treatment process: the drying temperature is 150°C and the time is 30 hours.

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Abstract

A process for preparing the water-proof macro-reticular spherical silicon gel includes such steps as reaction between sodium silicate and diluted sulfuric acid to obtain gel balls, ageing, steaming, baking, burning, immersing in acid, water washing and baking.

Description

technical field [0001] The invention relates to a method for manufacturing silica gel, in particular to a method for manufacturing macroporous spherical silica gel. Background technique [0002] Among the existing silica gel products, there is a kind of macroporous spherical silica gel. The manufacturing method is as follows: gel particles are prepared by reacting sodium silicate solution and dilute sulfuric acid solution in reaction equipment, and the gel particles are then aged → acid foam →Washing →Drying process to make large-pore spherical silica gel products. There is another manufacturing method, the gel particles are processed by acid foaming→water washing→aging→secondary acid foaming→drying process to make macroporous spherical silica gel products. [0003] The common feature of the above-mentioned processes is to carry out acid soaking, washing with water first, and then drying. After actual inspection, it is found that there are some deficiencies in this process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/143
Inventor 李永兆
Owner 李永兆
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