Method for preparing sulfoxide chloride from industrial chloride salt

A technology of thionyl chloride and chloride salt, applied in chemical instruments and methods, alkali metal sulfite/sulfite, inorganic chemistry, etc., can solve the large gap between supply and demand, the production capacity of thionyl chloride cannot be satisfied, etc. problems, to achieve the effect of facilitating circulation and transportation, realizing circular economy and large industrial value

Inactive Publication Date: 2018-12-07
SHANDONG RUNBO BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the market information of thionyl chloride, the current production capacity of thionyl chlorid...

Method used

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  • Method for preparing sulfoxide chloride from industrial chloride salt

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Experimental program
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Effect test

Embodiment 1

[0046] Get multi-effect sodium chloride (containing 0.12 organic matter) 18.43g in reaction unit, make its temperature maintain on 105 ℃ with oil bath unit, then slowly add 99.9% sulfur trioxide in reaction unit, the addition rate of sulfur trioxide is with The temperature rise of the material in the reaction device is not obvious. The average adding rate of sulfur trioxide in the laboratory is 0.5g / min. Stir the reaction. When the sulfur trioxide is added, the qualified intermediate material can be obtained. Intermediate material sodium chlorosulfonate 43.58g. According to the mass balance calculation, the added sulfur trioxide mass is 25.17g.

[0047] Then heat the obtained intermediate material to 300°C for cracking reaction, add 16.20g of sulfur dichloride to the mixed gas produced in the cracking process, enter the thionyl chloride synthesis device (activated carbon catalysis, reaction temperature 200°C), and the reaction is completed Get the sulfur oxychloride that reac...

Embodiment 2

[0050] Get multi-effect sodium chloride (containing 0.97% organic matter) 18.71g in reaction unit, make its temperature maintain on 150 ℃ with oil bath unit, then slowly add 50.6% sulfur trioxide in reaction unit, the rate of addition of sulfur trioxide Subject to the insignificant temperature rise of the material in the reaction device, the average adding rate of sulfur trioxide in the laboratory is 1.1g / min, and the reaction is stirred. When the sulfur trioxide is added, the qualified intermediate material can be obtained, and the liquid state can be obtained by weighing. The intermediate material sodium chlorosulfonate 43.87g. The mass of sulfur trioxide added according to material balance calculation is 25.34g.

[0051] Then the obtained intermediate material is heated up to 300°C for cracking reaction, the mixed gas produced in the cracking process is added with 16.32g of sulfur dichloride, and enters the thionyl chloride synthesis device (activated carbon catalysis, reac...

Embodiment 3

[0054] Get multi-effect sodium chloride (containing 2.1% organic matter) 18.87g in reaction unit, make its temperature maintain on 180 ℃ with oil bath unit, then slowly add 80% sulfur trioxide in reaction unit, the rate of addition of sulfur trioxide Subject to the insignificant temperature rise of the material in the reaction device, the average adding rate of sulfur trioxide in the laboratory is 0.87g / min, and the reaction is stirred. When the sulfur trioxide is added, the qualified intermediate material can be obtained, and the liquid state can be obtained by weighing. The intermediate material sodium chlorosulfonate 43.75g. According to the material balance calculation, the added sulfur trioxide mass is 25.26g.

[0055] Then the obtained intermediate material is heated up to 300°C for cracking reaction, and 16.26g of sulfur dichloride is added to the mixed gas produced in the cracking process, and enters the thionyl chloride synthesis device (activated carbon catalysis, re...

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Abstract

The invention provides a method for preparing sulfoxide chloride from industrial chloride salt, wherein the method includes the following steps: S1) carrying out a reaction of the industrial chloridesalt with sulfur trioxide at the temperature of 80-200 DEG C to obtain chlorosulfonate; S2) carrying out high temperature cracking of the chlorosulfonate at the temperature of 300-900 DEG C to obtainsulfate, chlorine gas and sulfur dioxide; and S3) mixing the chlorine gas and sulfur dioxide obtained in the S2) with sulfur dichloride, and carrying out a reaction under the catalytic action of activated carbon to obtain sulfoxide chloride. The sulfur trioxide is used as a strong oxidant at high temperature, the residence time of materials is prolonged, waste salt is converted into chlorosulfonate, and organic matters in the waste salt are oxidized to remove in the reaction process; then high temperature cracking is carried out, while chlorine gas and sulfur dioxide with equal moles are obtained, trace organic matters which are not oxidized by sulfur trioxide can be subjected to oxidative decomposition by high temperature again, the organic matters are treated more thoroughly, and sulfoxide chloride can be prepared by adding equimolar sulfur dichloride.

Description

technical field [0001] The invention relates to the technical field of chemical waste post-treatment, in particular to a method for preparing thionyl chloride from industrial chloride salts. Background technique [0002] At present, most chemical enterprises will produce high-salt wastewater in the production process. Through a series of treatments, by-product industrial chloride salts containing a small amount of organic matter can be obtained. This part of the salt is difficult to be effectively treated and utilized, and can only be treated as hazardous waste. Not only has no economic value, but also consumes relatively high processing costs, which cost about 3000-5000 yuan / ton. At present, the main means of disposing of hazardous waste is landfill. If it is accidentally leaked, it will cause secondary pollution. [0003] At present, only a small number of chemical companies can further refine this part of the salt to increase the salt content, but the products obtained b...

Claims

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Application Information

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IPC IPC(8): C01B17/45C01D5/00
CPCC01B17/4584C01D5/00
Inventor 孙国庆侯永生李盼盼牟红海胡义山
Owner SHANDONG RUNBO BIOTECH CO LTD
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