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Degassing process for producing sodium hexadecyl sulfonate

A technology for a mixture of sodium cetyl sulfonate and alkylsulfonyl chloride, which is applied in the preparation of sulfonate, products, and organic compounds, and can solve the problem of high impurity content of sodium cetyl sulfonate, cetane Low purity of sulfonyl chloride, complex degassing process and other problems, to achieve the effect of great application value, high yield and convenient cutting

Active Publication Date: 2021-03-09
安徽海顺化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the degassing process of cetylsulfonyl chloride is complicated and incomplete, resulting in low purity of cetylsulfonyl chloride, high impurity content and low yield in the finished product of sodium cetylsulfonate, And the existence of unreacted chlorine gas, sulfur dioxide and by-product hydrogen chloride gas in the liquid will cause environmental pollution, and in severe cases, endanger human health

Method used

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  • Degassing process for producing sodium hexadecyl sulfonate
  • Degassing process for producing sodium hexadecyl sulfonate
  • Degassing process for producing sodium hexadecyl sulfonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A degassing process for producing sodium cetyl sulfonate, comprising the following steps:

[0031] The first step is to add heavy oil into the reaction kettle, and under the light of ultraviolet light, pass the mixed gas of chlorine gas and sulfur dioxide into the reaction kettle according to the volume ratio of 1:2, control the temperature in the reaction kettle to 31 ℃, and the rotation speed to 100r / min Under the conditions, react for 3h to obtain a mixture of alkylsulfonyl chlorides;

[0032] In the second step, the alkylsulfonyl chloride mixture is dropped into the degasser from the feed pipe 21, and the chlorine, sulfur dioxide and by-product hydrogen chloride gas in the alkylsulfonyl chloride mixture are removed through the degasser to obtain the impurity-removed alkylsulfonyl chloride liquid, and discharge the degasser through discharge pipe 25 to obtain purified alkylsulfonyl chloride;

[0033] The third step is to add the purified alkylsulfonyl chloride into th...

Embodiment 2

[0036] A degassing process for producing sodium cetyl sulfonate, comprising the following steps:

[0037] The first step is to add heavy oil into the reaction kettle, and under the light of ultraviolet light, pass the mixed gas of chlorine gas and sulfur dioxide into the reaction kettle according to the volume ratio of 1:2, control the temperature in the reaction kettle to 33 ℃, and the rotation speed to 150r / min Under the condition, react 4h, obtain alkylsulfonyl chloride mixture;

[0038] In the second step, the alkylsulfonyl chloride mixture is dropped into the degasser from the feed pipe 21, and the chlorine, sulfur dioxide and by-product hydrogen chloride gas in the alkylsulfonyl chloride mixture are removed through the degasser to obtain the impurity-removed alkylsulfonyl chloride liquid, and discharge the degasser through discharge pipe 25 to obtain purified alkylsulfonyl chloride;

[0039] The third step is to add the purified alkylsulfonyl chloride into the reaction ...

Embodiment 3

[0042] A degassing process for producing sodium cetyl sulfonate, comprising the following steps:

[0043] The first step is to add heavy oil into the reaction kettle, and under the light of ultraviolet light, pass the mixed gas of chlorine gas and sulfur dioxide into the reaction kettle according to the volume ratio of 1:2, control the temperature in the reaction kettle to 35 ℃, and the rotation speed to 200r / min Under the following conditions, react for 5h to obtain a mixture of alkylsulfonyl chlorides;

[0044] In the second step, the alkylsulfonyl chloride mixture is dropped into the degasser from the feed pipe 21, and the chlorine, sulfur dioxide and by-product hydrogen chloride gas in the alkylsulfonyl chloride mixture are removed through the degasser to obtain the impurity-removed alkylsulfonyl chloride liquid, and discharge the degasser through discharge pipe 25 to obtain purified alkylsulfonyl chloride;

[0045] The third step is to add the purified alkylsulfonyl chlo...

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Abstract

The invention discloses a degassing process for producing sodium hexadecyl sulfonate, which comprises the following steps: 1, adding heavy oil into a reaction kettle, and introducing chlorine and sulfur dioxide mixed gas into the reaction kettle to obtain an alkyl sulfonyl chloride mixture; 2, feeding the alkyl sulfonyl chloride mixture into a degassing device through a feeding pipe to obtain purified alkyl sulfonyl chloride; 3, adding the purified alkyl sulfonyl chloride into a reaction tank filled with a sodium hydroxide solution, and reacting for 1-2h to obtain a mixed solution A; and 4, purifying and separating the mixed solution A to obtain the sodium hexadecyl sulfonate. According to the invention, chlorine, sulfur dioxide and hydrogen chloride gas in the alkyl sulfonyl chloride mixture are removed by a method of combining mechanical stirring and hot gas extraction, and the degassing device has the characteristics of heat preservation, convenience in blanking, safety in use and the like, and is simple in degassing process. The product has high purity and high yield, and has great application value in the process of industrial production of sodium hexadecyl sulfonate.

Description

technical field [0001] The invention belongs to the technical field of sodium cetyl sulfonate production, and in particular relates to a degassing process for producing sodium cetyl sulfonate. Background technique [0002] Sodium cetyl sulfonate is an anionic surfactant with good water solubility. It has good wetting, emulsifying, dispersing, foaming and decontamination capabilities in hard water. It has good biodegradability and is less irritating to the human body. It is used in Industrial detergent and civil liquid detergent, cleaning agent for textile industry, dyeing auxiliaries, flotation agent for beneficiation. [0003] Sodium cetyl sulfonate is a watery white turbid liquid with a density of 1.055g / cm at 20°C 3 , viscosity 0.02Pa.s, flash point greater than 100 ° C, in the industrial production process, heavy oil is generally sulfonylated under the conditions of sulfur dioxide and chlorine gas to obtain hexadecylsulfonyl chloride, and hexadecylsulfonyl chloride is r...

Claims

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Application Information

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IPC IPC(8): C07C303/10C07C303/44C07C309/80C07C303/32C07C309/04
CPCC07C303/10C07C303/44C07C303/32C07C309/80C07C309/04Y02P20/141
Inventor 孙涛涛韦耀景京吴金斌吴文娟
Owner 安徽海顺化工有限公司
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