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Purification method of sodium silicate

A purification method, water glass technology, applied in the direction of alkali metal silicate, silicate, etc., can solve the problems of increasing energy consumption, prolonging the process route, and low filtration efficiency, so as to improve purity and transparency, simple operation method, high efficiency effect

Inactive Publication Date: 2013-01-16
福建海能新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This filtration method has a large loss of liquid, and the specific gravity of sodium silicate liquid (high concentration), the filtration efficiency is low, and it cannot be industrialized.
Generally, when the vacuum filtration method is used, the solid sodium silicate is dissolved and diluted into a low-concentration feed liquid, which reduces the viscosity and specific gravity of the feed liquid, and the filtration rate is significantly improved; but for high-concentration varieties, the filtrate must be concentrated. It not only prolongs the process route and increases energy consumption, but also the dilution and concentration process will bring some adverse effects to the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The liquid water glass is removed by a plate and frame filter press to remove coarse particles of impurities to obtain a coarsely separated liquid water glass; the coarsely separated liquid water glass is first passed through a macroporous adsorption resin column, and the outflowing solution passes through the cathode at a flow rate of 20m / h. , cation exchange column, remove impurity ions, obtain high-purity liquid water glass; Wherein macroporous adsorption resin adopts DA201, anion and cation exchange resin are 001×7 type styrene series cation exchange resin and D110 type acrylic series anion exchange resin respectively.

[0023] The main technical indicators of the high-purity liquid water glass obtained through testing are as follows:

[0024] Fe≤30PPM, Ca≤2PPM, Cu≤2PPM, Mg≤3PPM, and other heavy metals are basically eliminated.

Embodiment 2

[0026] The liquid water glass is removed by a plate and frame filter press to remove coarse particles and impurities, and the coarsely separated liquid water glass is obtained; the coarsely separated liquid water glass is first passed through the macroporous adsorption resin column, and the outflowing solution passes through the cathode at a flow rate of 25m / h. , cation exchange column, remove impurity ions, obtain high-purity liquid water glass; wherein macroporous adsorption resin adopts D101, anion and cation exchange resin are respectively 001×7 type styrene series cation exchange resin and D110 type acrylic series anion exchange resin.

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PUM

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Abstract

The invention provides a purification method of sodium silicate. The method comprises the following steps: sending sodium silicate liquid to a plate-and-frame filter press to remove coarse particle impurities and obtain the coarsely separated sodium silicate liquid; filling the coarsely separated sodium silicate liquid in a macroporous adsorption resin column, sending the obtained solution to an anion exchange column and a cation exchange column to remove ion impurities and obtain the high purity sodium silicate liquid, wherein the solution firstly flows through the anion exchange column and secondly flows through the cation exchange column in series. The operation method of the invention is simple and has high efficiency; and the obtained sodium silicate liquid has higher transparency and purity, thus creating a necessary condition for the production of high-quality and high-grade white carbon black.

Description

technical field [0001] The invention provides a method for purifying water glass. Background technique [0002] Sodium silicate, the common name is water glass, and the trade name is sodium silicate. Water glass is an important inorganic chemical raw material. In addition to being used as a detergent and binder component, it is also an important raw material for the manufacture of fine chemical products such as silica gel, molecular sieve, silica sol, and white carbon black. It has a wide range of uses. important role in the national economy. [0003] The appearance of pure water glass is a colorless viscous liquid, containing Fe 2 o 3 、Al 2 o 3 , CaO, MgO and other impurities will be gray, green or even black. In addition, water glass also contains impurity salts, NaCl, Na 2 SO 4 、Na 2 CO 3 Wait. The above-mentioned water glass impurities have obvious adverse effects on the density, viscosity, hardening speed, bonding strength, aging speed, surface tension, l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/32
Inventor 周海波
Owner 福建海能新材料有限公司