Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Production process and production system of dodecylbenzene sulfonic acid

A technology of dodecylbenzenesulfonic acid and dodecylbenzene, applied in the preparation of sulfonic acid, organic chemistry and other directions, can solve the problems of sulfonated product quality impact, production line shutdown, high process air requirements, etc., to shorten the time The effect of the occurrence process, the use of less equipment costs, and the reduction of process energy consumption

Pending Publication Date: 2021-03-23
ZANYU TECH GRP CO LTD +1
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Obtain SO from sulfur burning method 3 The air gas generation process has high requirements on the process air, which requires a large amount of dry air with a dew point below -60°C. If the dew point is too high, it will have a great impact on the quality of subsequent sulfonated products, and in severe cases, the production line will be shut down; At present, there is no report on the process of directly using compressed and cooled air at 4-8°C to generate sulfonated air

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production process and production system of dodecylbenzene sulfonic acid
  • Production process and production system of dodecylbenzene sulfonic acid
  • Production process and production system of dodecylbenzene sulfonic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0037] The present embodiment provides a kind of production technology of dodecylbenzenesulfonic acid, comprising:

[0038] After the external air is removed by the filter, it enters the Roots blower for compression treatment, and the pressure at the outlet of the blower can reach 55KPa; the pressurized hot air then enters the air low-temperature condenser to cool down at about 8°C, and then directly flows from the bottom of the sulfur furnace Enter (for comparison, the cooling gas of a pipeline continues to be carried out according to the original process pipeline), contact with the liquid sulfur transported by the liquid sulfur pump on the upper part of the furnace, ignite and burn, the flow rate of liquid sulfur is 330kg / h, and the sulfur furnace exits SO 2 / air mixed gas temperature at 650°C; high temperature SO 2 / The air mixed gas is cooled to 450°C by the partition air cooler and enters the conversion tower, and the gas temperature at the outlet of the conversion tower ...

Embodiment example 2

[0045] The present embodiment provides a kind of production technology of dodecylbenzenesulfonic acid, comprising:

[0046] After the outside air is removed by the filter, it enters the Roots blower for compression treatment, and the pressure at the outlet of the blower can reach 58KPa; the pressurized hot air then enters the air low-temperature condenser to cool down at about 10°C, and then directly flows from the bottom of the sulfur furnace Enter, contact with the liquid sulfur transported by the liquid sulfur pump in the upper part of the furnace, ignite and burn, the flow rate of liquid sulfur is 350kg / h, and the outlet of the sulfur burning furnace is SO 2 / air mixed gas temperature at 650°C; high temperature SO 2 / The air mixed gas is cooled to 450°C by the partition air cooler and enters the conversion tower, and the gas temperature at the outlet of the conversion tower is 450°C; the SO at the outlet of the conversion tower 3 The / air mixed gas enters the first-stage ...

Embodiment example 3

[0052] The present embodiment provides a kind of production technology of dodecylbenzenesulfonic acid, comprising:

[0053] After the outside air is removed by the filter, it enters the Roots blower for compression treatment, and the pressure at the outlet of the blower can reach 60KPa; the pressurized hot air then enters the air low-temperature condenser to cool down at about 8°C, and then directly flows from the bottom of the sulfur furnace Enter, contact with the liquid sulfur transported by the liquid sulfur pump in the upper part of the furnace, ignite and burn, the flow rate of liquid sulfur is 354kg / h, and the outlet of the sulfur burning furnace is SO 2 / air mixed gas temperature at 650°C; high temperature SO 2 / The air mixed gas is cooled to 450°C by the partition air cooler and enters the conversion tower, and the gas temperature at the outlet of the conversion tower is 450°C; the SO at the outlet of the conversion tower 3 The / air mixed gas enters the first-stage a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a production process and a production system of dodecylbenzene sulfonic acid. The production process comprises the following steps: directly combusting liquid sulfur and cooling air in a sulfur combustion furnace, introducing obtained SO2 / air gas mixture into a conversion tower, continuing to conduct oxidization to obtained SO3 / air gas mixture under the action of a catalyst, carrying out primary cooling deacidification, then performing cooling to an operating temperature again, filtering out a small amount of acid mist through a demister, allowing the treated gas mixture to directly enter a sulfonator for a sulfonation reaction with dodecylbenzene, and aging and hydrolyzing sulfonated acid ester to obtain stable dodecylbenzene sulfonic acid. Compared with a conventional process for allowing air to undergo sulfonation via a sulfur combustion method in the prior art, the production process of the invention has the advantages that process flow is shorter, requirements on the dew point of process air is low, operation is simple and convenient, use cost is low, process energy consumption is low, the application range of the process is wide, and the quality of the product dodecylbenzene sulfonic acid obtained by sulfonating dodecylbenzene is the same as the quality of the product dodecylbenzene sulfonic acid obtained by the original process.

Description

technical field [0001] The invention relates to a production process of dodecylbenzenesulfonic acid, in particular to a process for obtaining suitable gas-concentrated SO by optimizing the sulfur combustion method. 3 / air mixed gas, used in the production process and production system of sulfonated dodecylbenzene. Background technique [0002] In recent years, the proportion of sulfonation reaction process and technology in the field of modern chemical industry has gradually increased. The sulfonation process is widely used in the preparation of dyes, pesticides, pigments and pharmaceutical intermediates, etc., and occupies a very important position in fine chemicals. The introduction of sulfonic acid groups (-SO 3 After H), it gives organic molecules emulsification, foaming, wetting and other surface activities, and is widely used in the field of surfactant preparation; and due to the acidity and hydrolyzability of sulfonic acid groups, sulfonation also gives organic molec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/06C07C309/31
CPCC07C303/06C07C309/31
Inventor 刘炜康史立文葛赞邹欢金华文高余新林雷小英李伏益
Owner ZANYU TECH GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com