Silica gel preparation method and silica gel obtained by method

A technology of silica gel and colloidal particles, which is applied in the field of silica gel and inorganic silica gel, can solve the problems of low production efficiency, easy to damage the fine structure of silica gel, and high cost, and achieve high production efficiency, good adsorption effect, and reduced dosage.

Active Publication Date: 2019-02-01
QINGDAO MAKALL GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a preparation method of silica gel and the silica gel obtained therefrom, which solves the problems in the prior art that the washing process of silica gel easily destroys the microstructure inside the silica gel and the problems of low production efficiency and high cost

Method used

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  • Silica gel preparation method and silica gel obtained by method
  • Silica gel preparation method and silica gel obtained by method

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preparation example Construction

[0019] The preparation method of a kind of silica gel of the present invention comprises the following steps in sequence: glue making, aging, tapping, washing and drying; the washing step uses magnetized water for washing, the washing temperature is 20-80°C, and the washing end point is The conductivity of the colloidal particles is below 0.5mS / cm.

[0020] Preferably, the water washing temperature in the water washing step is 30-70°C.

[0021] Further, the water washing temperature in the water washing step is 45-60°C.

[0022] Specifically, the water washing end point of the water washing process is that the electrical conductivity of the colloidal particles is 0.1-0.5 mS / cm.

[0023] More preferably, the water washing time of the water washing step is 10-40 hours.

[0024] Furthermore, the water washing time in the water washing step is 20-30 hours.

[0025] More specifically, the magnetized water is obtained by magnetizing tap water through a magnetizer, and the frequen...

Embodiment 1

[0030] The preparation method of a kind of silica gel of the present invention comprises the following steps in sequence: rubber making, aging, rubber tapping, washing and drying; raw materials are sulfuric acid (mass concentration is 30%) and natron (mass concentration is 20%), acid The mass ratio of alkali is 1:4. The washing process uses magnetized water for washing. The washing method adopts single washing. The washing temperature is 80°C. It is magnetized by a magnetizing machine. The frequency of the magnetizing machine is 35KHz. After the tap water passes through the magnetizing machine, the temperature rises by 1°C.

Embodiment 2

[0032]The preparation method of a kind of silica gel of the present invention comprises the following steps in sequence: rubber making, aging, rubber tapping, washing and drying; raw materials are sulfuric acid (mass concentration is 30%) and natron (mass concentration is 20%), acid The mass ratio of alkali is 1:4. The washing process uses magnetized water for washing. The washing method adopts serial washing. The washing temperature is 20°C. The frequency of the magnetizing machine is 30KHz, and the temperature of tap water rises by 2°C after passing through the magnetizing machine.

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Abstract

The invention discloses a silica gel preparation method and silica gel obtained by the method, and relates to the technical field of inorganic silica gels. The preparation method sequentially comprises glue preparing, aging, glue cutting, water washing, and drying, wherein washing is performed with magnetized water in the water washing step, the water washing temperature is 20-80 DEG C, and the water washing end point is the rubber particle conductivity of less than 0.5 mS/cm. According to the present invention, the water washing is performed with magnetized water during the preparation of thesilica gel, and the water washing time is shortened to below 40 h so as to save the water washing time of the silica gel and improve the production efficiency of the silica gel; the magnetized waterhas high magnetic property, and can quickly wash out the salt ions in the silica gel so as to reduce the consumption of the magnetized water and reduce the production cost; the silica gel has the specific surface area of 300-800 m<2>/g and the pore volume of 0.4-1.0 mL/g, such that the fine pore channel structure inside the silica gel is protected at a maximum, and the protection of the micro-pores is increased; and the preparation method has good economic benefits, and further has a certain social benefit.

Description

technical field [0001] The invention belongs to the technical field of inorganic silica gel, in particular to a preparation method of silica gel and the silica gel obtained therefrom. Background technique [0002] The production process of inorganic silica gel is usually a certain concentration of sodium silicate and sulfuric acid. After rubber making, aging and rubber tapping, it is soaked and washed with tap water, and then dried to obtain silica gel products. Silica gel is a porous structure material, through the reaction of sodium silicate and sulfuric acid, dehydration condensation to form porous silica, the by-product sodium sulfate remains in the fine pores of silica gel, the purpose of water washing in the production process is to wash out the sodium sulfate in silica gel , form a stable skeleton structure and improve the quality of silica gel. [0003] At present, the water washing of inorganic silica gel is mostly carried out by single washing or serial washing in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/14
CPCC01B33/14C01P2006/12C01P2006/14C01P2006/16C01P2006/40
Inventor 李永兆
Owner QINGDAO MAKALL GROUP CO LTD
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