Production technology for recycling potassium chloride from saturated glaserite mother liquor

A production process, the technology of potassium mirabilite, applied in the direction of alkali metal chloride and the like, can solve the problems of difficult separation, complex potassium salt recovery process, etc., and achieve the effects of simple composition, simple process, and simplified precipitation form.

Active Publication Date: 2015-10-28
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, break through the technical shortcomings of the existing potassium salt recovery process complex and difficult separation, and provide a simple process, low energy consum...

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 technology for recycling potassium chloride from saturated glaserite mother liquor
  • Production technology for recycling potassium chloride from saturated glaserite mother liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Mixing with brine: 1000g saturated potassium mirabilite mother liquor (See Table 1 for chemical composition) and 689g salt lake brine (Refer to Table 1 for chemical composition) Mix with halogen at 20℃ and mix well to obtain 1689g of mother liquor with halogen;

[0035] (2) Sun-dried potash salt: Transfer 1689g of the brine-mixing mother liquor obtained in step (1) to the potash-salt field, and naturally evaporate 570g (equivalent to 33.75wt% of the brine-mixing mother liquor) water at 23°C to precipitate potash Solid-liquid separation after salting, to obtain 347 g of potash salt and 772 g of mother liquor A;

[0036] (3) Sun-dried carnallite: transfer 772g mother liquor A obtained in step (2) to carnallite salt field, and naturally evaporate 98g (equivalent to 12.69wt% of mother liquor A) water at 22°C to precipitate carnallite After solid-liquid separation, 216g carnallite and 458g mother liquor B are obtained;

[0037] (4) Extraction of potassium chloride: the 347g ...

Embodiment 2

[0042] (1) Mixing with brine: 1000g saturated potassium mirabilite mother liquor (See Table 2 for chemical composition) and 1177g salt lake brine (Refer to Table 2 for chemical composition) Mix with halogen at 25℃ and mix well to obtain 2177g of mother liquor with halogen;

[0043] (2) Sun-dried potash salt: Transfer 2177g of the brined mother liquor obtained in step (1) to the potash salt field, and evaporate 496g (equivalent to 22.78wt% of the brined mother liquor) of water at 23°C to precipitate potash After the salt is solid-liquid separated, 313g potash salt and 1368g mother liquor A are obtained;

[0044] (3) Sun-dried carnallite: transfer 1368g of mother liquor A obtained in step (2) to carnallite salt field, and naturally evaporate 232g (equivalent to 16.96wt% of mother liquor A) water at 26°C to precipitate carnallite After solid-liquid separation, 400g carnallite and 736g mother liquor B are obtained;

[0045] (4) Extraction of potassium chloride: the 313g of potash salt...

Embodiment 3

[0050] (1) Mixing with brine: 1000g saturated potassium mirabilite mother liquor (See Table 3 for chemical composition) and 917g salt lake brine (See Table 3 for chemical composition). Mix with halogen at 30°C and mix well to obtain 2917g of mother liquor with halogen;

[0051] (2) Sun-dried potash salt: transfer 1917g of the brine-mixing mother liquor obtained in step (1) to the potash-salt field. At 28°C, 562g (equivalent to 29.32wt% of the brine-mixing mother liquor) of water is naturally evaporated to precipitate potash Solid-liquid separation after salting to obtain 340g potash salt and 1015g mother liquor A;

[0052] (3) Sun-dried carnallite: Transfer 1015g of mother liquor A obtained in step (2) to carnallite salt field, and naturally evaporate 242g (equivalent to 23.84wt% of mother liquor A) water at 27℃ to precipitate carnallite After solid-liquid separation, 251g carnallite and 522g mother liquor B are obtained;

[0053] (4) Extraction of potassium chloride: the 340g of ...

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 provides a production technology for recycling potassium chloride from saturated glaserite mother liquor. The production technology comprises the following steps of 1, conducting brine mixing, wherein the saturated glaserite mother liquor and old brine in a salt lake are mixed according to the mass ratio of 1:0.6-1.5, and mother liquor mixed with the brine is obtained; 2, sun-curing sylvine, wherein after 20 wt%-35 wt% of water in the mother liquor mixed with the brine is naturally evaporated, solid-liquor separation is conduced, and then the sylvine and mother liquor A are obtained; 3, sun-curing carnallite, wherein after 10 wt%-30 wt% of water in the mother liquor A is naturally evaporated, solid-liquor separation is conduced, and carnallite and mother liquor B are obtained; 4, extracting potassium chloride, wherein floatation is conducted on the sylvine and the carnallite, and then the potassium chloride product is obtained. By the adoption of the production technology, the recovery rate of K+ in a technological salt field reaches up to 96.61%, the total yield of the K+ of a system reaches up to 91.95%, the purity of the potassium chloride product reaches up to 98.06%, and the potassium chloride product meets the agricultural potassium chloride superior product standard. The production technology is simple, low in energy consumption and cost, avoids co-separation of potassium-containing sulfate minerals, part of old brine in the salt field can be digested, and the environmental-protection problem is effectively relieved.

Description

technical field [0001] The invention relates to a potassium salt recovery process, in particular to a production process for recovering potassium chloride from saturated potassium mirabilite mother liquor. Background technique [0002] Potassium chloride is the main raw material in the conversion of potassium sulfate production, widely exists in solid potassium salt ore, or can be extracted and separated from potassium-containing sea salt lakes. In the production of potassium sulfate by the conversion of Glauber's salt, a large amount of first-stage conversion mother liquor, that is, saturated potassium Glauber's salt mother liquor, whose potassium content is about 40% of the potassium content in the system, will be produced. If it is not properly recycled, it will greatly affect the system. Potassium yield, reducing the production efficiency of enterprises. It is difficult for the mother liquor to obtain relatively pure single potassium salt through a pure evaporation and ...

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): C01D3/06
Inventor 高文远李昱昀汤建良郑贤福
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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