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Method for extracting sulfur in sulfur-contained slag by chlorohydrocarbon organic solvent

A technology of organic solvents and chlorinated hydrocarbons, applied in solid solvent extraction, chemical instruments and methods, inorganic chemistry, etc., to achieve good dissolution effect, easy operation and maintenance, and quick results

Inactive Publication Date: 2010-01-06
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few research reports on new extractants, and some non-CS 2 The extractant has the same effect as CS 2 Solvents vary widely

Method used

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  • Method for extracting sulfur in sulfur-contained slag by chlorohydrocarbon organic solvent
  • Method for extracting sulfur in sulfur-contained slag by chlorohydrocarbon organic solvent

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Embodiment approach

[0038] A method for extracting sulfur from sulfur-containing waste residue using chlorinated hydrocarbon organic solvents. It uses sulfur-bearing paste type sulfur-containing waste residue as raw material to obtain sulfur products through centrifugal separation, extraction reaction, solution filtration, cooling and crystallization, and solid-liquid separation. Proceed as follows:

[0039] (I) Select sulfur-containing waste residue for centrifugal separation, remove waste water, grind raw materials, and reserve;

[0040] (II) Metering the above-mentioned sulfur-containing grinding material into the extraction reactor;

[0041] (III) Press solvent m again 1 : Sulfur-containing abrasive m 2 = 5~20:1 mass ratio adding solvent to boiling point 121.2℃, density 1.6226g / cm 3 Tetrachloroethylene or adding solvent has a boiling point of 86.7℃ and a density of 1.4649g / cm 3 At the same time, 1%-16% of the total mass of the sulfur-containing waste residue is added as an adsorbent for the extracti...

Embodiment 1

[0062] Put 54g of sulfur-containing grinding material into the reactor with a capacity of 1 liter. 1 : Sulfur-containing abrasive m 2 =20:1 mass ratio, the boiling point of the added solvent is 121.2℃, and the density is 1.6226g / cm 3 At the same time, add 6.48g of activated carbon with 12% of the total mass of sulfur-containing waste residue on a dry basis. Stir at 110°C and react for 30 minutes. The solution is insulated and filtered, cooled and crystallized, and solid-liquid separated. The net weight of sulfur product is 39.80g. According to the sulfur content in the dry basis, the sulfur recovery rate is 96.52%.

Embodiment 2

[0064] Put 54g of sulfur-containing grinding material into the reactor with a capacity of 1 liter. 1 : Sulfur-containing abrasive m 2 =16:1 mass ratio, the boiling point of the added solvent is 121.2℃, and the density is 1.6226g / cm 3 At the same time, add 4.32g of activated carbon with 8% of the total mass of sulfur-containing waste residue on a dry basis. Stir at 100°C and react for 25min. The solution is heated and filtered, cooled and crystallized, and solid-liquid separated. The net weight of sulfur product is 34.25g. According to the sulfur content in the dry basis, the sulfur recovery rate is 83.05%.

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Abstract

The invention relates to a method for extracting sulfur in sulfur-contained slag by chlorohydrocarbon organic solvent. The method adopts the technical scheme that raw sulfur cream sulfur-contained slag is used as a raw material to carry out centrifugal separation, extraction reaction, solution filtration, cooling crystallization and solid-liquid separation to obtain a sulfur product; a great deal of raw sulfur cream sulfur-contained slag produced when gas produced by an iron and steel coking enterprise is purified and desulphurized is used as the raw material; after being ground, the raw material carries out extraction reaction with the organic solvent; the solution carries out heat preservation filtration, the cooling crystallization and the solid-liquid separation to obtain a sulfur product, and the low-price and poison solvent for recovering sulfur is developed. The invention overcomes the defects of resource consumption, corresponding environmental pollution, and the like caused by not adopting an effective processing measure on the sulfur-contained slag in the prior HPF method gas desulphurizing technology and is widely applied to process and recycle the sulfur-contained slag produced in the coking desulphurization process in iron and steel smelting industries.

Description

Technical field [0001] The invention relates to a method for extracting sulfur from sulfur-containing waste residues by using chlorinated hydrocarbon organic solvents. Background technique [0002] In order to adapt to the in-depth energy-saving and emission-reduction policies and increasingly strict environmental protection requirements, more desulfurization devices have been adopted, especially the technical measures for sulfur recovery in the oil and natural gas industry. [0003] Many domestic iron and steel enterprises have adopted wet catalytic oxidation ammonia desulfurization HPF purification process (①Shi Qiuying, Lin Xianxi, Zhu Yangyong. Production practice of HPF gas desulfurization device[J]. Fuel and Chemical Industry, 2004, 35( 6): 29~32; ②Li Fazhu, Tian Wenxiang, Wang Ruizhong. Discussion on continuous sulfur melting with HPF desulfurization method[J]. Fuel and Chemical Industry, 2005, 36(5): 52~53), but sulfur melting generally does not operate normally As a resul...

Claims

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Application Information

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IPC IPC(8): C01B17/033B01D11/02
Inventor 石顺存康玉佳邓春凤喻娟娟海全胜黄念东令玉林时振栓
Owner HUNAN UNIV OF SCI & TECH
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