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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

Inactive Publication Date: 2020-01-03
长沙工研院环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many pesticide manufacturers have been shut down due to environmental protection issues, waste sulfur slag, as an abandoned chemical waste, is still piled up in the factory warehouse due to its huge reserves and cannot be processed in time
The accumulation of a large amount of waste sulfur slag not only occupies a large amount of land, but also seriously pollutes the soil environment. The random stacking of waste sulfur slag and the volatile pungent odor also cause air pollution and seriously affect people's lives.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The waste sulfur slag (available sulfur content is 72%) stockpiled by a pesticide factory in Shandong was taken to prepare an organic high-sulfur stabilizer. The preparation method is as follows:

[0039]Weigh 250g of waste sulfur slag, grind it thoroughly, pass through a 20-mesh sieve, add 30g of calcium hypochlorite, stir well, add 50L of water solvent while stirring, and let it stand for use; then add 20g of ethanol solution and 10g of ethylene glycol After the solution is stirred quickly, after stirring evenly, add 300g of sodium sulfide solid, continue to stir, add 500g of water, use mechanical stirring, the speed is set at 100r / min, add 40L of polysaccharide solution with a concentration of 10g / L during the stirring process, and then continue to stir After observing that the yellow elemental sulfur in the liquid has fully reacted, add 100L of PAM solution with a concentration of 1g / L, stir slowly, and let it stand for one hour. After observing the obvious stratif...

Embodiment 2

[0041] The waste sulfur slag (available sulfur content is 72%) stockpiled by a pesticide factory in Shandong was taken to prepare an organic high-sulfur stabilizer. The preparation method is as follows:

[0042] Weigh 280g of waste sulfur slag, grind it thoroughly, pass through a 20-mesh sieve, add 10g of potassium permanganate, stir well, add 50L of water solvent while stirring, add 20g of diatomite after standing for 10min, and let it stand for use ; Then add 20g of ethylene glycol solution and 10g of propanol solution and stir rapidly, after stirring evenly, add 300g of sodium sulfide solid, continue to stir, add 500g of water, use mechanical stirring, set the speed at 100r / min, add 40L of sodium sulfide during the stirring process Carboxylic acid sugar solution with a concentration of 10g / L, and then continue to stir. After observing that the yellow elemental sulfur in the liquid has fully reacted, add 100L of 80L aluminum sulfate solution with a concentration of 1g / L, sti...

Embodiment 3

[0044] The waste sulfur slag (available sulfur content is 72%) stockpiled by a pesticide factory in Shandong was taken to prepare an organic high-sulfur stabilizer. The preparation method is as follows:

[0045] Weigh 300g of waste sulfur residue, fully grind, pass through a 20-mesh sieve, add 20g of 30% activated sodium persulfate, stir well, add 10g of diatomaceous earth after standing for 10min, add 50L of water solvent while stirring, let stand Stand-by; then add 20g of ethanol solution and 10g of ethylene glycol solution and stir rapidly, after stirring evenly, add 300g of sodium sulfide solid, continue to stir, add 500g of water, use mechanical stirring, the speed is set at 100r / min, add during stirring 20L concentration is 10g / L carboxylate sugar solution and 20L concentration is 10g / L polysaccharide solution, then keep stirring, after observing the yellow elemental sulfur in the liquid reacts fully, add 20L concentration is the PAM solution of 1g / L and 80L concentratio...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K17/02
CPCC09K17/02C09K17/40
Inventor 缪书舟韩宝禄刘卫国史学峰李昌武张海隆邵乐黄新伟
Owner 长沙工研院环保有限公司
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