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Method for improving use ratio of sulfonating agent

A technology of sulfonating agent and utilization rate, which is applied in the field of improving the utilization rate of sulfonating agent, can solve the problems of low utilization rate of sulfonating agent and high content of inorganic salt, so as to reduce the content, reduce the production of by-products, and reduce the loss of lye The effect of consumption

Active Publication Date: 2013-12-04
SHANDONG DAMING FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low utilization rate of sulfonating agent and high content of inorganic salt in the product, and provide a method for improving the utilization rate of sulfonating agent in the production process of petroleum sulfonate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The 270~510°C distillate in the refinery is mixed with dichloroethane at a ratio of 3:2 (mass ratio), sulfur trioxide is diluted with dichloroethane to a 25% solution, and 300 g of the prepared distillate is gradually added dropwise to the prepared Sulfur trioxide 285g, the acid solution obtained after sulfonation enters the stripping tower from the top, the dry air is preheated to 80° C., and enters the stripping tower from the bottom. The volume ratio of hot air and acid solution is 3:1. Then the acid gas containing sulfur trioxide from the stripping tower enters the bottom of the absorption tower, and the fresh distillate oil prepared by distillate and dichloroethane enters the top of the absorption tower, and the acid gas and the preparation The final distillate oil enters the absorption tower at a volume ratio of 5:1. Get 300g of distillate oil discharged from the bottom of the absorption tower, add dropwise 285g of 25% sulfur trioxide, then make the sulfonated aci...

Embodiment 2

[0016] Distillate oil at 310-520°C in refinery is mixed with dichloroethane at a ratio of 3:2 (mass ratio), sulfur trioxide is diluted with dichloroethane to a 25% solution, 300 g of distillate oil is added dropwise to 295 g of 25% sulfur trioxide , the acid liquid obtained after sulfonation enters the stripping tower from the top, and the dry air is preheated to 50°C and enters the stripping tower from the bottom, and the volume ratio of hot air to acid liquid is 20:1. Then the acid gas containing sulfur trioxide from the stripping tower enters the bottom of the absorption tower, and the fresh distillate oil prepared by distillate and dichloroethane enters the top of the absorption tower, and the acid gas and the preparation The volume ratio of the final distillate is 30:1. Take 300g of distillate oil discharged from the absorption tower, add 266g of 25% sulfonating agent dropwise, and then make the sulfonated acid liquid enter the stripping tower with the above parameters, a...

Embodiment 3

[0019] Distillate oil at 330-450°C in refinery is mixed with dichloroethane at 1:1 (mass ratio), sulfur trioxide is diluted with dichloroethane to a 25% solution, take 300g of distillate oil and gradually add 210g of 25% sulfur trioxide , the acid liquid obtained after sulfonation enters the top of the stripping tower, the dry air is preheated to 65°C and enters the stripping tower from the bottom, and the volume ratio of hot air and acid liquid is 10:1. Then the acid gas containing sulfur trioxide discharged from the stripping tower enters the bottom of the absorption tower, and the fresh distillate oil prepared by distillate and ethylene dichloride enters the top of the absorption tower, and the acid gas and the preparation The volume ratio of the distillate after is 15:1. Take 300g of distillate oil discharged from the absorption tower, add dropwise 200g of 25% sulfonating agent, and then make the sulfonated acid solution enter the stripping tower with the above parameters,...

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Abstract

Provided is a method for improving the use ratio of a sulfonating agent in the production process of petroleum sulfonate. The method for improving the use ratio of the sulfonating agent is characterized by comprising the steps that (1) the dried air is preheated to be at the temperature from 50DEG C to 80DEG C, the air serves as a stripping medium, the air enters a stripping tower through the bottom of the stripping tower, sulfonation is carried out between raw oil and liquid sulfur trioxide in a sulfonation system to form a sulfonation product, the sulfonation product enters the stripping tower through the top of the stripping tower, the air is 3-20 times the volume of the sulfonation product, neutralization is carried out on acid fluid discharged through the bottom of the stripping tower through a solution with 30% sodium hydroxide or 25% ammonium hydroxide, and solvent is removed to obtain a petroleum sulfonate product; (2) acid gas which contains sulfur trioxide and is discharged through the top of the stripping tower enters the bottom of an absorption tower, fresh raw oil enters the absorption tower through the top of the absorption tower, and the acid gas is 5-30 times the volume of the fresh raw oil; (3) distillate oil discharged from the absorption tower enters the sulfonation system again to carry out a reaction with the liquid sulfur trioxide, then, the process of stripping of the sulfonation product in the stripping tower and the process of absorption of the raw oil to stripped gas are carried out in sequence, and normal production of the petroleum sulfonate can be achieved. The method for improving the use ratio of the sulfonating agent effectively solves the problems that the use ratio of the sulfonating agent in the production process of the petroleum sulfonate is low, and inorganic salt in products is high in content.

Description

technical field [0001] The invention relates to a method for increasing the utilization rate of sulfonating agent in the production process of petroleum sulfonate, which can be used in the liquid phase sulfonation production of petroleum sulfonate to improve the utilization rate of sulfonating agent and reduce the generation of by-products. Background technique [0002] In the liquid-phase sulfonation production process of petroleum sulfonate, in order to make more raw material oil (generally a certain fraction of crude oil) participate in the sulfonation reaction and improve the sulfonation conversion rate of the raw material oil, it is generally necessary to use Excess sulfonating agent. The excess sulfonating agent that does not participate in the sulfonation reaction will exist in the product in the form of inorganic salt after neutralization, causing the content of inorganic salt in the product to exceed 10%, while the oil field requires the content of inorganic salt in...

Claims

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Application Information

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IPC IPC(8): C07C309/62C07C303/32
Inventor 杨明常李元新韩月梅崔继峰赵迪杨丙飞
Owner SHANDONG DAMING FINE CHEM CO LTD
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