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Extraction agent for preparing potassium nitrate with nitric acid-potassium chloride extraction method

A technology of potassium chloride and extractant, which is applied in the field of extractant for preparing potassium nitrate by nitric acid-potassium chloride extraction method, can solve the problems of increasing the loss of raw material nitric acid and increasing the difficulty of stripping process, and achieves high selectivity and saving Loss, the effect of improving the purity

Inactive Publication Date: 2018-03-27
安徽胜达化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the extractants currently used are isoamyl alcohol. Although isoamyl alcohol can remove hydrochloric acid from the reaction system, it also has an extraction effect on nitric acid, which increases the loss of raw material nitric acid and increases the difficulty of the stripping process. And the by-product hydrochloric acid is often mixed with nitric acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The invention provides an extractant for preparing potassium nitrate, the extractant includes isoamyl alcohol, n-butanol, trioctyl tertiary amine, and n-octanol, and the volume ratio thereof is 1:0.24:6.1:2.06.

Embodiment 2

[0017] The invention provides an extractant for preparing potassium nitrate, the extractant includes isoamyl alcohol, n-butanol, trioctyl tertiary amine, and n-octanol, and the volume ratio thereof is 1:0.28:5.7:1.94.

Embodiment 3

[0019] The invention provides an extractant for preparing potassium nitrate, the extractant includes isoamyl alcohol, n-butanol, trioctyl tertiary amine, and n-octanol, and the volume ratio thereof is 1:0.25:6.4:1.87.

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PUM

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Abstract

The invention discloses an extraction agent for preparing potassium nitrate with a nitric acid-potassium chloride extraction method. The extraction agent is prepared from isoamyl alcohol, n-butyl alcohol, tri-n-octylaminetri-octyl tertiary amine, n-caprylic alcohol according to a volume ratio of 1 to (0.1 to 0.5) to (3 to 10) to (1.3 to 3). The extractant provided by the invention has a good extraction effect and high selectivity for hydrochloric acid in a nitric acid-potassium chloride reaction system, the hydrochloric acid can be extracted without while not extracting nitric acid, the nitricacid serving as a raw material is saved, the purity of the nitric acid serving as a by-product is improved; the nitric acid prepared by back extraction can be directly taken as a product for selling.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to an extractant used for preparing potassium nitrate by a nitric acid-potassium chloride extraction method. Background technique [0002] Potassium nitrate is one of the important chemical raw materials, widely used in various fields such as national defense, military industry, industry, agriculture, food additives, medicine, feed additives, optical glass and electronics industry. [0003] The nitric acid-potassium chloride extraction method uses potassium chloride and nitric acid as raw materials, and reacts at a low temperature of 5-10°C in the presence of an extractant to generate potassium nitrate and hydrochloric acid. The method uses an extractant to separate the hydrochloric acid in the reaction system, so that the reaction is relatively complete, and the generated potassium nitrate is continuously crystallized. Most of the extractants currently used are isoamyl a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D9/18C01D9/04C01B7/07
CPCC01B7/0737C01D9/04C01D9/18
Inventor 常先进谭帅
Owner 安徽胜达化工科技有限公司