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Extraction solution, application and method for preparing active light calcium carbonate and co-producing high-purity magnesium hydroxide and/or magnesium carbonate

An active light, magnesium hydroxide technology, used in magnesium hydroxide, chemical instruments and methods, calcium carbonate/strontium/barium, etc.

Active Publication Date: 2020-10-23
厦门市汇创源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can obtain Mg(OH) through a simple extraction process 2 , but for the obtained Mg(OH) 2 Purification and subsequent processing not mentioned

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] (1) Take 150g of isooctyl alcohol, 80g of dodecylamine, and 65g of propionic acid, mix them uniformly, and prepare an extraction solution.

[0090] (2) Get 50g dolomite (the main components are 59wt% calcium oxide and 39wt% magnesium oxide), 500g water and 153g pyrrolidine propionate are mixed and reacted at 110°C, the gas phase obtains pyrrolidine vapor, the liquid-solid phase is filtered, and the filtrate obtains Calcium propionate aqueous solution, in which the calcium dissolution rate is 95.5%, and the filter cake is Mg(OH) 2 solid.

[0091] (3) Add the extraction solution prepared in step 1) to the Mg(OH) obtained in step 2) 2 In the solid, control the propionic acid and Mg(OH) in the extraction solution 2 The molar ratio of the solution is 2:1. After the reaction is complete at 60°C, the phases are separated at rest, and the aqueous phase is filtered to obtain an aqueous solution of magnesium propionate. The filter residue is insoluble and discarded. The extract...

Embodiment 2

[0095] (1) Take 70g of 4-heptanone, 160g of isooctylamine, and 75g of acetic acid, mix them uniformly, and prepare an extraction solution.

[0096] (2) Get 63g dolomite (the main components are 59wt% calcium oxide and 39wt% magnesium oxide), 500g water and 184g diethylamine acetate are mixed and reacted at 80°C, the gas phase obtains diethylamine vapor, the liquid-solid phase is filtered, and the filtrate Obtain calcium acetate aqueous solution, wherein calcium dissolution rate is 99.2%, filter cake is Mg(OH) 2 solid.

[0097] (3) Add the extraction solution prepared in step 1) to the Mg(OH) obtained in step 2) 2 In the solid, control the acetic acid and Mg(OH) in the extraction solution 2 The molar ratio is 2.1:1, and the reaction temperature is 90°C. After static phase separation, the aqueous phase is filtered to obtain an aqueous solution of magnesium acetate. The filter residue is insoluble and discarded. The extraction rate of magnesium is 98.5%. The oily phase obtaine...

Embodiment 3

[0101] (1) Take 270g of butyl acrylate, 15g of di-n-propylamine, and 15g of formic acid, mix them uniformly, and prepare an extraction solution.

[0102] (2) Get 18g dolomite (the main components are 59wt% calcium oxide and 39wt% magnesium oxide), 108g water and 54g formate piperidine salt are mixed and reacted at 130°C, the gas phase obtains piperidine vapor, the liquid-solid phase is filtered, and the filtrate obtains formic acid Calcium aqueous solution, the dissolution rate of calcium is 99.5%, and the filter cake is Mg(OH) 2 solid.

[0103] (3) Add the extraction solution prepared in step 1) to the Mg(OH) obtained in step 2) 2 In the solid, control formic acid and Mg(OH) in the extraction solution 2 The molar ratio is 1.9:1, and the reaction temperature is 100°C. After static phase separation, the aqueous phase is filtered to obtain an aqueous solution of magnesium formate. The filter residue is insoluble and discarded. The extraction rate of magnesium is 99.1%. The oi...

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Abstract

The invention relates to an extraction solution, application and a method for preparing active light calcium carbonate and co-producing high-purity magnesium hydroxide and / or magnesium carbonate. Theextraction solution comprises an organic extraction solvent, organic amine and carboxylic acid; the organic extraction solvent is insoluble in water and can dissolve the organic amine, the carboxylicacid and carboxylic acid amine salt, and the organic amine reacts with the carboxylic acid to obtain the carboxylic acid amine salt; the organic amine and the carboxylic acid amine salt are easily dissolved in the organic extraction solvent; and magnesium carboxylate obtained by reaction of the carboxylic acid and magnesium hydroxide is easily dissolved in water. According to the invention, an extraction and reverse extraction principle is utilized, selective extraction and separation of calcium and magnesium in dolomite ash are successfully realized, ammonia / amine obtained through calcium extraction is used as a precipitant of magnesium and an oil phase obtained through magnesium extraction is used as a reverse extraction solution of calcium by ingeniously utilizing the alkalinity difference of Mg(OH)2, Ca(OH)2 and the extraction solution, the production cost is reduced through cross recycling of the extraction solution and the reverse extraction solution, and meanwhile, a calcium-magnesium product with a high additional value is obtained.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and specifically relates to an extraction solution, application and a method for preparing active light calcium carbonate and co-producing high-purity magnesium hydroxide and / or magnesium carbonate. Background technique [0002] Magnesium hydroxide is one of the important varieties of magnesium compound industrial products. It is weakly alkaline, has strong buffer performance and chemical adsorption performance, and has attracted more and more attention. It has a wide range of applications in environmental protection, ceramic materials, medicine and other fields. Due to its high decomposition temperature, good thermal stability, non-toxic, non-toxic and smoke-suppressing properties, it has developed rapidly in the field of inorganic flame retardants in recent years. [0003] In the early stage of industry, brine or brine ore was often used as raw material to react with alkali substan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C01F5/24C01F5/20C01F5/14
CPCC01F11/183C01F5/24C01F5/20C01F5/14C01F11/005C01P2006/80C01P2004/62C01P2004/61
Inventor 钟劲光钟俊
Owner 厦门市汇创源科技有限公司
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