Combined production of alkali by using waste water

A combined alkali and wastewater production technology, applied in chemical instruments and methods, carbonate preparations, alkali metal compounds, etc., can solve the problems of difficult treatment, long process route, low efficiency, etc., to protect the ecological environment, reduce manufacturing costs, The effect of improving efficiency

Inactive Publication Date: 2005-05-11
王禄宏
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of high cost, long and complicated process route and melamine production tail gas in the existing soda production process, especially the difficulty in the treatment of carbonized ammonia water and low benefit of the normal pressure full ammonia catalytic circulation method, and propose a brand-new The method of producing soda ash from melamine wastewater using the atmospheric pressure full ammonia catalytic cycle method shortens the process flow, saves electricity and steam consumption, and greatly reduces production costs

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
  • Combined production of alkali by using waste water
  • Combined production of alkali by using waste water
  • Combined production of alkali by using waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 as Figure 1-5 Shown: the manufacturing process technology of the present invention mainly contains the following steps: 1. Collect the waste carbonized ammonia water produced by normal pressure full ammonia catalytic circulation method melamine in a concentrated manner, and require the index of carbonized ammonia water to meet ammonia content 27.3%-29%, carbon dioxide content 32.3%-35%, the water content is less than 40% (theoretical calculation is based on the actual measurement results of ammonia in the production of carbonized ammonia: ammonia: 27.37%, carbon dioxide 32.26%, water 40.37% This index is because there was no requirement for carbonized ammonia in the past, as long as the melamine device It is allowed for efflux, but now comprehensive utilization must consider the stable and normal operation of downstream devices.

[0021] 2. Prepare standard mother liquor II according to the production of combined alkali

[0022] 3. Pump the mother liquor II ...

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

No PUM Login to view more

Abstract

A combined soda production with waste water is carried out by: 1) totally collecting waste carbureted ammonia water produced by melamine with constant pressure ammonium catalytic circulating method, ammonia content of carbureted ammonia water > 27%, carbon dioxide content > 33%, and water content < 40%; 2) separating dicarbonate to obtain mother liquor, making mother liquor I heat exchange with mother liquor II , and cold crystallizing separating out industrial ammonium chloride; 2) salting out semi-mother liquor II , adding sodium chloride, and salting out crystallizing separating to obtain agricultural ammonium chloride. It achieves low cost and no pollution.

Description

technical field [0001] The invention relates to a new route for alkali production, in particular to a method for joint alkali production using waste water, which belongs to the technical field of chemical manufacturing technology. Background technique [0002] At present, the soda-making process in our country is relatively developed, and the total output ranks first in the world, but the process is very complicated. In summary, there are the following types: one is trona, the other is nepheline soda, the third is mirabilite soda, and the third is ammonia. Soda production by soda method, four-combination method (Hou's soda production method) soda production, and the fifth is gas-changing soda production. The above alkali-making methods except natural ones have relatively high processing costs. Taking the combined alkali method as an example, since its ammonia and carbon dioxide come from a synthetic ammonia plant, the cost of this piece is relatively high, and it needs 2 tim...

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): C01D7/00C01D7/16
CPCY02P20/141
Inventor 王禄宏
Owner 王禄宏
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