Method for synthesizing organic high-sulfur stabilizer from industrial waste sulfur slag

A stabilizer and sulfur slag technology, applied in organic fertilizers, chemical instruments and methods, agriculture, etc., can solve problems such as large reserves that cannot be processed in time, affecting people's lives, and air pollution, and achieve resource utilization of waste resources, High environmental friendliness and low process energy consumption
CN110643368AInactive Publication Date: 2020-01-03长沙工研院环保有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
长沙工研院环保有限公司
Publication Date
2020-01-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for synthesizing an organic high-sulfur stabilizer from industrial waste sulfur slag. The method comprises the following steps: uniformly mixing the sulfur slag with adeodorant, a cosolvent, an alkali metal sulfide, a catalyst and a solvent, stirring and reacting the obtained mixture, and adding a purifying agent to precipitate and remove impurities in order to obtain the organic high-sulfur stabilizer with a high sulfur content and a good stability. The method has the advantages of low raw material cost, mild reaction conditions, and realization of recyclingof the waste sulfur slag. The prepared organic high-sulfur stabilizer is applied to remediation of heavy metal contaminated soil, can efficiently reduce high-valence heavy metals in soil, and particularly has a good stabilization effect on hexavalent chromium reducibility; and compared with common chalcogenide agents such as calcium polysulfide and sodium sulfide in the prior art, the organic high-sulfur stabilizer of the invention has the advantages of great reduction of the dosage of a vulcanizing agent and reduction of the remediation cost of heavy metal contaminated soil under the condition that the same stabilization effect is achieved.
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Description

technical field

[0001] The invention relates to a high-sulfur reagent, in particular to a method for synthesizing an organic high-sulfur stabilizer under mild conditions by using industrial waste sulfur residue and industrial sodium sulfide, and belongs to the technical field of heavy metal-contaminated soil remediation. Background technique

[0002] Ethyl chloride is an intermediate for the synthesis of some organophosphorus pesticides. Since the 20th century, the production process of ethyl chloride is mainly the reaction of phosphorus pentasulfide and absolute ethanol under the catalysis of pyridine to form sulfide, and then chlorinated by chlorine gas to obtain chlorine compounds. Chloride and the sodium sulfide produced by the sulfidation reaction undergo alkaline hydrolysis to remove sulfur. Then wash and refine to get the finished product. This process produces a large amount of waste sulfur residue. Although many pesticide manufacturers have been shut down due to ...

Claims

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