Method for preparing agricultural ammonium sulphate and calcined soda for industry with salt cake ammonia soda process

A technology of ammonium sulfate and ammonia-alkali method, applied in chemical instruments and methods, ammonia compounds, carbonate preparations, etc., can solve the problems of high energy consumption, waste water discharge, etc., achieve improved utilization rate, simple process, and broaden production channels Effect

Inactive Publication Date: 2008-12-10
GANSU JINSHI CHEM
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The early methods of making alkali from Glauber's salt all had the disadvantages of high energy consumption, discha...

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
  • Method for preparing agricultural ammonium sulphate and calcined soda for industry with salt cake ammonia soda process
  • Method for preparing agricultural ammonium sulphate and calcined soda for industry with salt cake ammonia soda process
  • Method for preparing agricultural ammonium sulphate and calcined soda for industry with salt cake ammonia soda process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A. Ammonia water carbonization process: configure the finished ammonia water with a concentration of 25% as a 100g / L solution and add it to the carbonization tower, and feed in a concentration of 25% CO 2 Gas carbonization for 2.5 hours, detection of NH 3 6.9%, CO 2 6.7%.

[0030] B. Nitrate dissolving process: Dissolve 100Kg of Glauber’s salt with a mass content of 85% in 300L of carbonized ammonia solution, filter and precipitate, wash with 50L of hot water, and the washing liquid composition is NH 3 12.5g / L, CO 2 14.6g / L and Na 2 SO 4 36g / L, the water content in the washed solids is 26%, the weight is 17.56Kg, and the clear liquid contains Na 2 SO 4 22.2%, the serum volume is 305L, the main component is Na 2 SO 4 260g / L, NH 3 83g / L, CO 2 92g / L, (NH 4 ) 2 SO 4 5.6g / L. After adding frozen salt, the solution is adjusted to a saturated solution of Glauber's salt, and its composition is: NH 3 83g / L, CO 2 110g / L and Na 2 SO 4 320g / L, (NH 4 ) 2 SO 4 8g / ...

Embodiment 2

[0057] A. Ammonia water carbonization process: configure the finished ammonia water with a concentration of 25% as a 105g / L solution and add it to the carbonization tower, and feed in a concentration of 35% CO 2 Gas carbonization for 6 hours, detection of NH 3 7.0%, CO 2 6.8%.

[0058] B. Nitrate-dissolving process: 100Kg of Glauber's salt with a mass content of 95% is dissolved in 300L of aqueous solution of ammonia carbonate, filtered and precipitated, washed with 50L of hot water, and after adding frozen salt, the solution is prepared as a saturated solution of Glauber's salt.

[0059] The detergent composition is NH 3 12.8g / L, CO 2 14.9g / L and Na 2 SO 4 39g / L, 26% water in the washed solids, 17.25Kg in weight, and Na in the supernatant 2 SO 4 22.7%, the serum volume is 305L, the main component is Na 2 SO 4 286g / L, NH 3 85g / L, CO 2 93g / L, (NH 4 ) 2 SO 4 5.9g / L. After adding frozen salt, the solution is adjusted to a saturated solution of Glauber's salt, and i...

Embodiment 3

[0082] Embodiment 3: repeat embodiment 1, have following difference,

[0083] A. Ammonia water carbonization process: directly dissolve ammonium bicarbonate to obtain NH 3 6.9~7.0% and CO 2 6.7-6.8% solution;

[0084] B. Nitrate dissolving process: directly dissolving Glauber's salt with a mass percent content of 85% in ammonium bicarbonate solution.

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

The invention discloses a method for producing an agricultural ammonia sulfate and a commercially pure soda by a glauber salt ammonia-soda process realizing CO2 emission reduction and no waste water emission. The method comprises the following steps: A) carbonization procedure of ammonia water, B) dissolution procedure of glauber salt, C) carbonization procedure, D) soda drying procedure, E) freezing and purification procedure, and F) evaporation and crystallization procedure of ammonia sulfate; a finished product is obtained by dehydration and drying, the filtrate obtained from the evaporation and crystallization is evaporated to a co-saturation point, the co-saturated filtrate is mixed with a mother liquor obtained by separation of sodium bicarbonate in step C and the mixture is frozen, and then the procedures are recycled. The method is characterized in that glauber salt is dissolved in a carbonized ammonia solution or ammonium bicarbonate solution and carbonated by CO2 gas to form and separate out the dense soda NaHCO3 crystal, the crystal is filtered and dried to obtain the standard soda; the mother liquor is mixed with the co-saturated solution obtained from the evaporation of the ammonium sulfate, the mixture is frozen to separate sodium sulfate from the ammonium bicarbonate precipitate, and the ammonium sulfate is obtained by evaporation, crystallization and drying. The method has the advantages of simple process, environmental protection, no pollution, the complete recycle of the mother liquor and no discharge of waste water.

Description

technical field [0001] The invention relates to a method for producing agricultural ammonium sulfate and industrial soda ash using Glauber's salt or chromium-containing Glauber's salt as raw materials. Background technique [0002] There are generally three processes for the production of agricultural ammonium sulfate: [0003] 1. Production of sulfur slag [0004] The sulfur slag for sulfur production contains 15-30% ammonium sulfate. After leaching, it is neutralized with lime, and the clear liquid that removes the calcium sulfate slag is further evaporated and concentrated, crystallized and dried to obtain the ammonium sulfate product. The process consumes about 4-5 tons of sulfur slag for every 1 ton of ammonium sulfate produced. Due to the lack of sulfur production resources in my country, sulfur mainly depends on imports, so the sulfur slag that can be used to produce ammonium sulfate is even more scarce, and large-scale production cannot be realized. [0005] 2. Pr...

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
IPC IPC(8): C01C1/244C01D7/12
Inventor 韩登仑张忠元何喜善宋春林毛学芹吴平何佩林
Owner GANSU JINSHI CHEM
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