Production method for coproducing sodium carbonate and ammonium chloride from sodium chloride

A technology of combined preparation and production methods, applied in the directions of ammonium chloride, ammonium halide, carbonate preparations, etc., can solve the problems of high raw water purification requirements, many device components, and high assembly requirements, reducing circulating materials and improving economic benefits. , good quality effect

Pending Publication Date: 2021-07-20
CHANGZHOU UNIV
View PDF9 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can realize the utilization ratio of sodium sulfate>85%, but owing to having used promotor, has introduced other ions except sulfate ion, makes the impurity increase in the product that obtains
[0008] Chinese patent CN110304640A has announced a kind of method utilizing sodium chloride and ammonium bicarbonate to prepare sodium bicarbonate and ammonium chloride, and this method has realized the production yield of sodium bicarbonate promotion 10%-15%, but because utilize , there are many parts in the device, and the assembly requirements are high; when the degree of dissociation of water in the electrodialysis equipment increases, polarization scaling and neutral disturbance are prone to occur; electrodialysis water treatment has high requirements for raw water purification, and precision filtration equipment is required

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production method for coproducing sodium carbonate and ammonium chloride from sodium chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method of preparing sodium carbonate with ammonium chloride, including the following steps:

[0027] (1) The high-salt wastewater is evaporated to evaporate, and the aqueous solution of sodium chloride is formed by high pure water ultrasound, wherein the NaCl mass concentration is 30%, and the ammonia gas is continuously passed in the ammonia tower. Absorption, where the molar ratio of ammonia gas and NaCl is 1: 1, the ammonia reaction temperature is 30 ° C, the ammonia time is 0.5 h, the reaction pressure is 0.1 MPa, and the absorption solution is converted to aproductive high salt wastewater.

[0028] (2) Put the ammonification high salt wastewater in step (1) from the pump into the tube, continuously introducing carbon dioxide gas to the carbonization tower, wherein carbon dioxide and NaCl molar ratio of 1.: 1, The carbonized reaction temperature was 20 ° C, the carbonization time was 0.5 h, and the reaction pressure was 0.1 MPa;

[0029] (3) A carbonate salt was forme...

Embodiment 2

[0032] A method of preparing sodium carbonate with ammonium chloride, including the following steps:

[0033] (1) The high-salt wastewater is evaporated to evaporate, and the aqueous solution of sodium chloride is formed into a supersaturated state in a high-pure water ultrasound, wherein the NaCl mass concentration is 40%, and the ammonia gas is continuously passed in the ammonia tower. Absorption, where the molar ratio of ammonia gas and NaCl is 1.5: 1, the ammonia reaction temperature is 40 ° C, the ammonia time is 1 h, the reaction pressure is 0.3 MPa, and the absorption solution is converted to aproductive high salt wastewater.

[0034] (2) Put the ammonium high salt wastewater in step (1) from the pump into the tube, continuously introducing carbon dioxide gas to the carbonization tower, wherein the carbon dioxide and NaCl ratio of 1.3: 1, carbonization The reaction temperature was 35 ° C, the carbonization time was 1 h, and the reaction pressure was 0.3 MPa;

[0035] (3) A ...

Embodiment 3

[0039] A method of preparing sodium carbonate with ammonium chloride, including the following steps:

[0040] (1) The high-salt wastewater is evaporated to evaporate, and the aqueous solution of sodium chloride is formed by high pure water ultrasound, wherein the NaCl mass concentration is 50%, and the ammonia gas is continuously passed into the ammonia. Absorption, where the molar ratio of ammonia gas and NaCl is 2: 1, the ammonia reaction temperature is 50 ° C, the ammonia is 1 h, the reaction pressure is 0.5 MPa, and the absorption solution is converted to ammonium hydrosal water.

[0041](2) The ammonium high salt wastewater in step (1) is flowed into the tower by the pump, and the carbon dioxide gas is continuously introduced into the carbonization tower, wherein the carbon dioxide and NaCl molar ratio are 1.5: 1, carbonization. The reaction temperature was 45 ° C, the carbonization time was 1 h, and the reaction pressure was 0.5 MPa;

[0042] (3) A carbonate salt was formed ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
purityaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of secondary utilization of sodium carbonate and resources, and particularly provides a production method for coproducing sodium carbonate and ammonium chloride from sodium chloride, which comprises the following steps: sequentially carrying out ammonification treatment, carbonization treatment and crystallization on a sodium chloride aqueous solution in a supersaturated state to obtain a sodium bicarbonate crude product and an ammonium chloride crude product; and carrying out washing, recrystallization and other post-treatments to obtain sodium carbonate and ammonium chloride. According to the method, the conversion per pass of sodium chloride is increased by 80% or above, the total conversion rate of sodium chloride exceeds 95%, the total conversion rate of ammonia reaches 98% or above, the yield of sodium carbonate is larger than 90%, and the yield of ammonium chloride is larger than 90%, so that circulating materials are reduced by 80% or above, energy consumption is greatly reduced, economic benefits are improved, and the method is environmentally friendly. Another advantage of the method is that the sodium carbonate and the ammonium chloride are good in quality and high in purity.

Description

Technical field [0001] The present invention belongs to the secondary utilization of sodium carbonate and the resource, in particular, a method of producing sodium carbonate and ammonium chloride in combination with sodium chloride. Background technique [0002] With the rapid development of the chemical industry, high-salt wastewater emissions with sodium chloride is getting bigger and larger, the greater the harm to the ecological environment. The conventional treatment method is to evapoctize high salt wastewater and concentrated salt in the wastewater. [0003] Sodium bicarbonate as an important chemical raw material, widely used in pharmaceutical, food, rubber, plastic and other industries. The production process of sodium bicarbonate is mainly: sodium carbonate, carbon dioxide is a pure alkaline carbonization method; with a natural base as a raw material extraction method; sodium bicarbonate and sodium hydrogencarbonate and carbon dioxide or ammonium carbon dioxide or ammon...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01D7/16C01C1/16
CPCC01D7/16C01C1/164C01P2006/80Y02P20/141
Inventor 朱新园吴浩卢潇顾豪施琴刘铭雨王午阳张跃裴孟陈烯刘建武
Owner CHANGZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap