A kind of preparation method of silica gel and silica gel obtained therefrom

A technology of silica gel and colloidal particles, applied in the directions of silica and silica, can solve the problems of low production efficiency, easy damage to the microstructure of silica gel, and high cost, and achieve the effect of high production efficiency, good adsorption effect, and reduced dosage.

Active Publication Date: 2021-10-01
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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  • A kind of preparation method of silica gel and silica gel obtained therefrom
  • A kind of preparation method of silica gel and silica gel obtained therefrom

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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 preparation method of silica gel and the silica gel obtained therefrom, and relates to the technical field of inorganic silica gel. The present invention includes the following processes in sequence: rubber making, aging, tapping, washing and drying; the washing process uses magnetized water for washing, the washing temperature is 20-80°C, and the end point of washing is that the conductivity of the rubber particles is below 0.5mS / cm. The invention adopts magnetized water washing in the preparation process of silica gel, and the washing time is shortened to less than 40 hours, which saves the washing time of silica gel and improves the production efficiency of silica gel; magnetized water has high magnetism, and quickly washes out the salt ions in silica gel, thereby reducing the The amount of magnetized water reduces the production cost; the specific surface area of ​​silica gel is 300‑800m 2 / g, the pore volume is 0.4‑1.0mL / g, which protects the fine pore structure inside the silica gel to the greatest extent and increases the proportion of micropores; the silica gel preparation method of the present invention not only has good economic benefits, but also has certain social benefits .

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 Patents(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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