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Process for crystals of heavy sodium carbonate

A heavy soda ash and crystal technology, which is applied in the direction of alkali metal carbonate to change the crystallization water content, etc., can solve the problem that the grain size and whiteness of heavy soda ash crystals cannot be fundamentally improved, and achieve the optimization of crystal grain size and whiteness, The effect of improving the qualified rate of particle size

Inactive Publication Date: 2013-11-06
SICHUAN HEBANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is mainly aimed at the transformation of the crystallizer, and cannot fundamentally improve the particle size and whiteness of heavy soda ash crystals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A process for producing liquid-phase hydration crystals of heavy soda ash using light soda ash as raw material, characterized in that: adding MgCl to the heavy ash mother liquor 2 , CaCl 2 Additives formulated with surfactants.

[0040] MgCl of the present invention 2 The concentration of the CaCl is 28mg / l; the CaCl 2 The concentration of the surfactant is 63mg / l; the concentration of the surfactant is 20mg / l, and the surfactant is dodecylamine.

[0041] The present invention adds MgCl in heavy ash mother liquor 2 , CaCl 2 , the weight proportion of tensio-active agent is:

[0042] Heavy ash mother liquor 100kg

[0043] MgCl 2 3.0kg

[0044] CaCl 2 6.5kg

[0045] Surfactant 2.0kg

[0046] The heavy ash mother liquor of the present invention refers to the saturated solution of sodium carbonate, and its main index is

[0047] Na 2 CO 3 300mg / l

[0048] NaCl 40 mg / l

[0049] Concrete steps of the present invention are as follows:...

Embodiment 2

[0055] For the same reason, as the above specific steps

[0056] A process for producing liquid-phase hydration crystals of heavy soda ash with light soda ash as raw material, adding MgCl to the heavy ash mother liquor 2 , CaCl 2 Additives formulated with surfactants. The MgCl 2 The concentration is 32mg / l; the CaCl 2 The concentration of the surfactant is 68mg / l; the concentration of the surfactant is 20mg / l, and the surfactant is dodecylamine.

[0057] The present invention adds MgCl in heavy ash mother liquor 2 , CaCl 2 , the weight proportion of tensio-active agent is:

[0058] Heavy ash mother liquor 100kg

[0059] MgCl 2 3.0kg

[0060] CaCl 2 6.5kg

[0061] Surfactant 2.0kg

[0062] The heavy ash mother liquor of the present invention refers to the saturated solution of sodium carbonate, and its main index is

[0063] Na 2 CO 3 330mg / l

[0064] NaCl 70 mg / l.

Embodiment 3

[0066] For the same reason, as the above specific steps

[0067] A process for producing liquid-phase hydration crystals of heavy soda ash with light soda ash as raw material, adding MgCl to the heavy ash mother liquor 2 , CaCl 2 Additives formulated with surfactants. The MgCl 2 The concentration is 30mg / l; the CaCl 2 The concentration of the surfactant is 65 mg / l; the concentration of the surfactant is 20 mg / l, and the surfactant includes dodecylamine.

[0068] The present invention adds MgCl in heavy ash mother liquor 2 , CaCl 2 , the weight proportion of tensio-active agent is:

[0069] Heavy ash mother liquor 100kg

[0070] MgCl 2 3.0kg

[0071] CaCl 2 6.5kg

[0072] Surfactant 2.0kg

[0073] The present invention refers to the saturated solution of sodium carbonate when adding the heavy ash mother liquor of the present invention, and its main index is Na 2 CO 3 310 mg / l; NaCl 65 mg / l.

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Abstract

The invention discloses a process for producing liquid phase hydration crystals of heavy sodium carbonate with light sodium carbonate as a raw material. According to the invention, an additive prepared from MgCl2, CaCl2 and a surfactant is added into mother liquor of heavy ash so as to affect granularity and whiteness of the crystals of heavy sodium carbonate, thereby improving the granularity qualified rate and whiteness of a product of heavy sodium carbonate.

Description

technical field [0001] The invention relates to a liquid-phase hydration method for producing heavy soda ash by using light soda ash as a raw material, in particular to a liquid-phase hydration process for producing heavy soda ash crystals by using light soda ash as a raw material. Background technique [0002] The liquid-phase hydration method of producing heavy soda ash with light soda ash as raw material has the advantages of continuous production, good stability, and is suitable for large-scale production. However, the main factors affecting the quality of heavy soda ash produced by liquid phase hydration are mother liquor temperature, hydration temperature, hydration time, light soda ash temperature, and calcination temperature. The particle size and whiteness of heavy soda ash are the main quality indicators of heavy soda ash products. How to improve the qualified rate of particle size of heavy soda ash products and increase whiteness is an important issue. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D7/35
Inventor 李涛
Owner SICHUAN HEBANG