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Process method for refining industrial sulfur from crude sulfur

A process method and sulfur technology, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve the problems of low sulfur recovery rate, environmental pollution, substandard product quality, etc., and achieve high sulfur recovery rate and broad market prospects. , to achieve the effect of comprehensive utilization of resources

Pending Publication Date: 2019-04-12
四川建志科技有限责任公司
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Problems solved by technology

The invention has the advantages of low energy consumption, simple technological process, easy operation control, economical, safe, and environmental protection, and the recovery rate of sulfur reaches over 90%, which solves the problems of environmental pollution easily caused by the stacking of sulfur paste for a long time and the problems in the purification process. Technical problems in energy consumption, safety, environmental protection, low sulfur recovery rate and substandard product quality, etc., and refined sulfur paste into industrial sulfur, realized the comprehensive utilization of sulfur resources

Method used

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  • Process method for refining industrial sulfur from crude sulfur

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) 100kg of sulfur paste with a sulfur content of 65% is first pretreated to make coarse sulfur powder with a water content of 2% and a particle size of <2mm;

[0027] (2) Put the crude sulfur paste powder prepared in step (1) into the conversion tank, add 140kg of 98% concentrated sulfuric acid, and react for 1.5 hours at a controlled temperature of 125°C with stirring to remove the organic sulfur in the crude sulfur. After removing impurities and a small amount of impurities such as ammonium thiocyanate and ammonium sulfate, conversion slurry is obtained;

[0028] (3) Vacuum filter the conversion slurry in step (2) to obtain 68.8 kg of crude sulfur filter cake and filter mother liquor;

[0029] (4) Add the crude sulfur filter cake in the step (3) into the molten sulfur kettle, add 5kg of calcium carbonate powder, 0.32kg of silica bath soil and 2.8kg of gypsum powder, and heat the crude sulfur to melt into crude liquid sulfur;

[0030] (5) After the crude liquid sulf...

Embodiment 2

[0033] (1) 100kg of sulfur paste with a sulfur content of 95% is first pretreated to make coarse sulfur powder with a water content of 2% and a particle size of <2mm;

[0034] (2) Put the crude sulfur paste powder prepared in step (1) into the conversion tank, add 120kg of 98% concentrated sulfuric acid, and react for 1.2 hours at a controlled temperature of 120°C with stirring to remove the organic sulfur in the crude sulfur. After removing impurities and a small amount of impurities such as ammonium thiocyanate and ammonium sulfate, conversion slurry is obtained;

[0035] (3) Vacuum filter the conversion slurry in step (2) to obtain 96.4 kg of crude sulfur filter cake and filter mother liquor;

[0036] (4) Add the crude sulfur filter cake in the step (3) into the melting sulfur kettle, add 3.5kg of calcium carbonate powder, 0.3kg of silicon bath soil and 3.1kg of gypsum powder, and heat the crude sulfur to melt into crude liquid sulfur;

[0037] (5) After the crude liquid s...

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Abstract

The invention discloses a process method for refining industrial sulfur from crude sulfur, and particularly relates to a new method for preparing industrial sulfur from crude sulfur (including blockyblack sulfur, sulfur paste and waste sulfur slag) which is a byproduct of industries such as coal chemical industry, oil refining, pesticide synthesis and the like. The process method comprises the following steps: carrying out heterogeneous reaction on pretreated crude sulfur under the action of a conversion agent to convert and decompose organic impurities such as coal tar, benzene and the like,thiocyanate and sulfate impurities contained in the crude sulfur; filtering the converted slurry to obtain a filter cake, adding a certain amount of modifier into the filter cake under the heating condition, and melting the filter cake into crude liquid sulfur. And carrying out precise filtration on the crude liquid sulfur to obtain refined liquid sulfur. The refined liquid sulfur is used as a liquid industrial sulfur product and can be cooled and molded to obtain a solid industrial sulfur product; the filtrate filtered by the conversion slurry is regenerated to recover the conversion agent and recycled.

Description

technical field [0001] The invention relates to the technical field of industrialization of renewable resources, in particular to a by-product crude sulfur refining industrial sulfur process. Background technique [0002] my country's sulfur minerals are very poor, and the pure sulfur necessary for industries such as rubber and compound fertilizers mainly depends on imports. From 2015 to 2017, the country imported about 11 million tons of sulfur each year, domestically produced about 5 million tons, and domestic annual demand was about 18 million tons. In my country, many coal chemical plants (including chemical fertilizers, coking, new coal chemical plants, etc.), thermoelectric plants, and non-ferrous smelting plants are all equipped with sulfur recovery plants. The sulfur content is between 50-98%, the impurity content is high, and the impurity composition is complex, so it cannot be directly used in production. It has not been effectively used and disposed of, and it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/027
CPCC01B17/027
Inventor 王国良曾宪金胡伟
Owner 四川建志科技有限责任公司
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