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A process for sulfonating mixtures of long-chain olefins and alkanes with sulfur trioxide gas

A technology for sulfonating long-chain olefins and alkane mixtures, applied in chemical/physical processes, organic chemistry, sulfonic acid preparation, etc., can solve problems such as long time, poor safety, and high energy consumption, and achieve simple methods and short processes Effect

Active Publication Date: 2021-01-29
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has two disadvantages: first, alkanes must be dehydrated and dried before they can be recycled; second, the separation process is too complicated
[0006] The existing patents and documents have not yet proposed the influence of alkanes on the process conditions and sulfonation tail gas during the sulfonation of mixtures of alkanes and olefins. Direct sulfonation of mixtures of alkanes and olefins on the currently industrialized sulfur trioxide sulfonation device not only affects product quality, but also Poor security, exhaust emissions are not up to standard
In addition, the existing process for preparing alkenyl sulfonate takes a long time, consumes a lot of water, and consumes a lot of energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: The C14-18 internal olefin / alkane mixture (olefin content 10% (w / w)) from the dehydrogenation of normal paraffins enters the sulfonation reactor from the upper part of the membrane sulfonator, and the feed temperature is 15 ° C. The amount of material is 40Kg / tube, and the sulfur trioxide / air mixed gas from the oleum stripping method also enters the sulfonation reactor from the upper part of the membrane sulfonator, and the SO 3 The gas concentration is 3% (V / V), olefin and SO 3 The molar ratio is 1:1.0, and the cooling water temperature of the sulfonator jacket is 15°C. The two flow down, and the sulfonation reaction occurs. The reaction product leaves from the lower part of the membrane sulfonator and enters the gas-liquid separator to be divided into a liquid phase and a gas phase. The gas phase is the sulfonated tail gas, and the liquid phase is the sulfonation of alkanes and olefins. mixture of products. The sulfonated tail gas is evacuated after cyclo...

Embodiment 2

[0034] The C18-28α-olefin / alkane mixture (olefin content 40% (w / w)) obtained from the rectification of Fischer-Tropsch synthetic oil enters the sulfonation reaction tube from the upper part of the membrane sulfonator, the feed temperature is 35°C, and the feed amount The sulfur trioxide / air mixture from the sulfur combustion method also enters the sulfonation reaction tube from the upper part of the membrane sulfonator, and the SO 3 The gas concentration is 7% (V / V), olefin and SO 3 The molar ratio is 1:1.2, and the cooling water temperature of the jacket of the sulfonator is 65°C. The two flow down, and the sulfonation reaction occurs. The reaction product leaves from the lower part of the membrane sulfonator and enters the gas-liquid separator to be divided into a liquid phase and a gas phase. The gas phase is the sulfonated tail gas, and the liquid phase is the sulfonation of alkanes and olefins. mixture of products. The sulfonated tail gas is evacuated after cyclone sepa...

Embodiment 3

[0036] The C15-C18α-olefin / alkane mixture (olefin content 60% (w / w)) obtained by the rectification of Fischer-Tropsch synthetic oil enters the sulfonation reactor from the upper part of the membrane sulfonator, the feed temperature is 25°C, and the feed amount The sulfur trioxide / air mixture from the sulfur combustion method also enters the sulfonation reactor from the upper part of the membrane sulfonator, and the SO 3 The gas concentration is 5.8% (V / V), olefin and SO 3The molar ratio is 1:1.15, and the cooling water temperature of the jacket of the sulfonator is 45°C. The two flow down, and the sulfonation reaction occurs. The reaction product leaves from the lower part of the membrane sulfonator and enters the gas-liquid separator to be divided into a liquid phase and a gas phase. The gas phase is the sulfonated tail gas, and the liquid phase is the sulfonation of alkanes and olefins. mixture of products. The sulfonated tail gas is evacuated after cyclone separation, con...

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PUM

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Abstract

A process for sulfonating long-chain alkenes and alkane mixtures with sulfur trioxide gas is to sulfonate the mixture of long-chain alkenes and alkanes with the mixed gas of sulfur trioxide and air. Sulfonic acid, sultone and alkane mixture, and then use molecular distillation to separate sultone and alkane mixture to obtain alkane and sultone, and then neutralize and hydrolyze to obtain alkenyl sulfonate and hydroxyalkyl Sulfonate. The invention has the advantages of low energy consumption, safety and environmental protection, and high product quality.

Description

technical field [0001] The invention relates to a process for preparing anion surfactant by carrying out sulfonation reaction of long-chain olefin / alkane mixture and sulfur trioxide gas. Background technique [0002] Olefin sulfonates are produced from long chain olefins via SO 3 Anionic surfactants produced after sulfonation, neutralization, and hydrolysis are divided into alpha olefin sulfonate (Alpha olefin sulfonate, AOS for short), internal olefin sulfonate (Internal olefin sulfonate) according to the position of the double bond in the olefin. , referred to as IOS). C14~18 AOS is mainly used in daily chemical products such as liquid detergent, washing powder, tableware detergent, etc. C2024 AOS and IOS with different alkyl chains are mainly used in oil displacing agents for tertiary oil recovery and industrial cleaning agents, etc. At present, the raw material α-olefin used in the preparation of AOS in China is mainly imported from abroad, almost all of which are prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C303/06C07C309/20B01F17/00C09K23/00
CPCC07C303/02C07C303/06C09K23/00
Inventor 刘晓臣霍月青鞠洪斌李全红韩亚明郭朝华牛金平
Owner CHINA RES INST OF DAILY CHEM IND