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Method for co-producing sodium pyrosulfate and sulfuryl chloride

A sodium pyrosulfate and sulfuryl chloride technology, applied in sulfuryl chloride, chemical instruments and methods, alkali metal sulfite/sulfite, etc., can solve high energy consumption, negative corporate benefits, and insufficient value of sodium chloride Cost requirements and other issues, to achieve high quality, reduce environmental hazards, and good economic benefits

Pending Publication Date: 2019-12-06
SHANDONG WEIFANG RAINBOW CHEM
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  • Claims
  • Application Information

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Problems solved by technology

At present, the technologies for treating organic matter in the by-product sodium chloride include pyrolysis, rotary furnace incineration, graded critical carbonization and other high-temperature treatment methods. These methods consume a lot of energy, and the value of the produced sodium chloride is not enough to meet the cost requirements. , bring negative benefits to the enterprise

Method used

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  • Method for co-producing sodium pyrosulfate and sulfuryl chloride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Take 35.78g of by-product sodium chloride and place it in a four-necked flask, heat it to 420°C in advance, and then slowly introduce sulfur trioxide gas into the four-necked flask. As the reaction progresses, the material first appears to stick to the wall , then this phenomenon disappeared, the surface of the material began to expand, and a small amount of yellow-green gas was released; the reaction was carried out for about 40 minutes, and a large amount of yellow-green gas began to be released uniformly; after the reaction was completed, a total of 178 minutes was carried out, and there was almost no yellow-green gas in the tail gas. 66.86 g of liquid product was obtained, and the material became solid after cooling. The yield was 98.33% based on sodium pyrosulfate, and the content of sodium pyrosulfate was 98.85% as detected by HPLC. According to the material balance calculation, the ratio of the moles of sulfur trioxide fed to the moles of sodium chloride added ...

Embodiment 2

[0029] 1. Take 31.97g of by-product sodium chloride and place it in a four-necked flask, heat it to 500°C in advance, and then slowly introduce sulfur trioxide gas into the four-necked flask. As the reaction progresses, the material first appears to stick to the wall , and then this phenomenon disappeared, the surface of the material began to expand, and a small amount of yellow-green gas was released; the reaction was carried out for about 32 minutes, and a large amount of yellow-green gas began to be released uniformly; after the reaction was completed, a total of 145 minutes was carried out, and there was almost no yellow-green gas in the tail gas. 59.89 g of liquid product was obtained, and the material became solid after cooling. The yield was 98.85% based on sodium pyrosulfate, and the content of sodium pyrosulfate was 99.12% as detected by HPLC. According to the material balance calculation, the ratio of the moles of sulfur trioxide fed to the moles of sodium chloride ad...

Embodiment 3

[0033] 1. Get 44.63g of by-product sodium chloride and place it in a four-necked flask, heat it to 585°C in advance, then slowly feed sulfur trioxide gas with a volume concentration of 90% in the four-necked flask, and as the reaction proceeds, the material The phenomenon of sticking to the wall first appeared, and then this phenomenon disappeared, and the surface of the material began to expand, accompanied by a small amount of yellow-green gas released; the reaction was carried out for about 25 minutes, and a large amount of yellow-green gas began to be released uniformly; the reaction was completed for 122 minutes, and the tail gas was almost no longer emitted. Yellow-green gas was emitted, and a total of 83.73 g of liquid products were obtained. After cooling, the material became solid. The yield was 99.17% based on sodium pyrosulfate. The content of sodium pyrosulfate was 99.28% as detected by HPLC. According to the material balance calculation, the ratio of the moles of s...

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Abstract

The invention discloses a method for coproducing sodium pyrosulfate and sulfuryl chloride. The method comprises the following steps: reacting the industrial byproduct sodium chloride with sulfur trioxide-containing gas at a high temperature to prepare sodium pyrosulfate, carrying out condensation reflux treatment on generated tail gas to recover sulfur trioxide, and introducing the tail gas into asulfuryl chloride synthesis device to synthesize sulfuryl chloride. The method is not reported at home and abroad, and is a pioneering technology; and the method prepares the high-content sodium pyrosulfate, overcomes the problems of accumulation and high treatment cost of the byproduct sodium chloride at present, converts the low-value byproduct sodium chloride into a high-value product which can be directly used for downstream production, and truly realizes the comprehensive utilization of resources.

Description

technical field [0001] The invention relates to a method for co-producing sodium pyrosulfate and sulfuryl chloride, in particular to a method for preparing sodium pyrosulfate and sulfuryl chloride by using by-product sodium chloride and sulfur trioxide as raw materials, and belongs to the technical field of waste resource utilization. Background technique [0002] Sodium pyrosulfate is widely used as a sewage purifier, analytical reagent, fruit and vegetable preservative, and melting agent for ores. As a sewage purifying agent, sodium pyrosulfate can act in combination with hydrogen peroxide, and has a good effect on degrading organic matter in sewage under the catalysis of ultraviolet light; with the gradual increase in the utilization of ore mining, the use of sodium pyrosulfate has greatly increased . [0003] At present, the production method of sodium pyrosulfate is mainly prepared by pyrolysis of sodium bisulfate at high temperature. This method not only consumes high...

Claims

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Application Information

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IPC IPC(8): C01B17/45C01D5/00
CPCC01B17/4592C01D5/00
Inventor 孙国庆侯永生梁倩李盼盼杨海龙葛岩牟红海
Owner SHANDONG WEIFANG RAINBOW CHEM
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