A low-pressure dimethyldichlorosilane hydrolysis system and process

A dimethyldichlorosilane and process technology, which is applied in the field of low-pressure dimethyldichlorosilane hydrolysis system, can solve the problem of incomplete reaction of dimethyldichlorosilane, complicated setting of purification and washing system, increased investment and operating costs and other problems, to achieve the effect of less impurities, uniform chain length and lower acidity value

Active Publication Date: 2020-08-04
LUXI CHEM GRP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two kinds of dimethyldichlorosilane hydrolysis processes in the domestic industry. One is azeotropic acid hydrolysis. The quality of the hydrolyzate obtained by this process is relatively good, but the energy consumption is large, and the by-product oily waste acid Difficult to handle, this process is basically no longer used in the industry
Another method is saturated acid hydrolysis (often referred to as "concentrated acid hydrolysis"). The inventors of the present disclosure found that due to the relatively high reaction pressure and high acid concentration in this method, there is a dimethyldichlorosilane reaction. Incomplete, high terminal chlorine content, high viscosity of hydrolyzate, high acid value, so that the subsequent purification and washing system is more complicated to set up, and the process is relatively long, which increases investment and operating costs

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
  • A low-pressure dimethyldichlorosilane hydrolysis system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A low-pressure system for the hydrolysis of dimethyldichlorosilane, such as figure 1 As shown, a circulation pump 1, a hydrolysis reactor 2, a desorption tower 3, a condenser 4, a dryer 5, a mist eliminator 6, a separator 7 and a compressor pump 8 are included.

[0050] The hydrolysis reactor 2, the hydrolysis reactor is a tubular structure, a number of mixing blades are installed in the tubular structure, and the tubular structure is filled with fillers. Flower plates are arranged at both ends of the tubular structure, the flower plates are perpendicular to the axis of the tubular structure, and the flower plates are plate-shaped structures with several through holes.

[0051] The hydrochloric acid solution is used as the carrier of the reaction, which is pressurized by the circulation pump 1 and mixed with dimethyldichlorosilane in the pipeline, then enters the hydrolysis reactor 2, and quickly mixes in the hydrolysis reactor 2, and after the hydrolysis reactor 2 ente...

Embodiment 2

[0055] The system of this embodiment is the same as that of Embodiment 1.

[0056] The specific process parameters are:

[0057] The feed rate of dimethylformamide is 1 liter / hour, the circulation rate of hydrochloric acid is 3 liters / hour, and the concentration of hydrochloric acid is 35%. During the test reaction process, the pressure was controlled at about 50KPa, the reaction temperature was controlled at about 45°C, the oil phase of the reaction product stayed in the separator for about 3 minutes, and stood still for 5 minutes after separation. At this time, the loop ratio of the hydrolyzate was measured by laboratory analysis. : 49, the acidity content in the hydrolyzate is 0.5% (saturated acid hydrolysis is generally more than 3%).

Embodiment 3

[0059] The system of this embodiment is the same as that of Embodiment 1.

[0060] The specific process parameters are:

[0061] The feed rate of dimethylformamide is 1 liter / hour, the circulation rate of hydrochloric acid is 5 liters / hour, and the concentration of hydrochloric acid is 33%. During the test reaction, the pressure was controlled at about 30KPa, the reaction temperature was controlled at about 45°C, the oil phase of the reaction product stayed in the separator for about 3 minutes, and stood still for 5 minutes after separation. At this time, the loop ratio of the hydrolyzate was measured by laboratory analysis. : 42, the acidity content in the hydrolyzate is 0.65% (saturated acid hydrolysis is generally more than 3%).

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 provides a system for low-pressure dimethyl dichlorosilane hydrolysis and a process. The system comprises a hydrolysis reactor, a circulation pump, an analysis tower and a separator, wherein the outlet of the hydrolysis reactor is connected with the inlet of the analysis tower; the liquid phase outlet of the analysis tower is connected with the inlet of the separator; the water phaseoutlet of the separator is connected with the inlet of the circulation pump; the outlet of the circulation pump is connected with the inlet of the hydrolysis reactor; the pipeline between the circulation pump and the hydrolysis reactor is connected with a conveying pipeline of dimethyl dichlorosilane; the analysis tower comprises a distribution disc and a film formation component; the distribution disc is arranged at the middle and upper part inside the falling film analysis tower; liquid distribution holes are formed in the distribution disc; the film formation component is arranged below the distribution disc; the film formation component is composed of a plurality groups of 'inverted Y' shaped plates; the separator is of a vertically arranged cylindrical structure; a water phase outletis formed in the bottom of the separator; an oil phase outlet is formed in the top of the separator.

Description

technical field [0001] The disclosure relates to a low-pressure dimethyldichlorosilane hydrolysis system and process. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] At present, there are two kinds of dimethyldichlorosilane hydrolysis processes in the domestic industry. One is azeotropic acid hydrolysis. The quality of the hydrolyzate obtained by this process is relatively good, but the energy consumption is large, and the by-product oily waste acid It is more difficult to handle, and this process method is basically no longer used in the industry. Another method is saturated acid hydrolysis (often referred to as "concentrated acid hydrolysis"). The inventors of the present disclosure have found that due to the relatively high reaction pressure and high acid concentration in this method, there is a dimethyldichlorosilane reaction. Incomplete, h...

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 Patents(China)
IPC IPC(8): C07F7/08
CPCC07F7/0836
Inventor 刘飞肖光王延峰杜景涛谢培建高兴利任慧敏王东东王庄印孙道成牛东芳
Owner LUXI CHEM GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap