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

Method for preparing 3-chlorine-2-methyl-1-propylene

A technology of methacrylic and methyl, applied in the field of preparing 3-chloro-2-methyl-1-propene, can solve the problems of low product yield, poor control of reaction time, many side reactions, etc. High, targeted enhancement, small cross-contact time effect

Inactive Publication Date: 2008-05-21
丁凌
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chlorine gasification of 2-methylpropene is an exothermic reaction. The heat of reaction is 108.9KJ / MOL. The existing technical scheme for preparing 3-chloro-2-methyl-1-propene using the above principle has many side reactions, and the reaction time is controlled Not good, resulting in low product yield

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
  • Method for preparing 3-chlorine-2-methyl-1-propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: as figure 1As shown, the present invention ensures enough time to complete the main reaction by adjusting the size of the reaction space, so that the light boiling chlorination side reaction is reduced to the minimum, and the reaction time is short enough (≤0.01s); the heat of reaction is required to be taken away quickly, reducing HCl The contact time with 2-methylpropene, the reaction product and chlorine gas can avoid the occurrence of side reactions of polychlorinated high boilers.

[0041] Such as figure 1 , a chlorination reaction device for preparing 3-chloro-2-methyl-1-propene from chlorine and 2-methylpropene, which includes a reactor A and a reaction system B. The chlorine gas feeding pipe 1 enters the outer pipe 3 through the porous side 2 of the pipe wall, and the outer pipe 3 has a conical nozzle 4 at the end, and the shape of the conical nozzle 4 is cylindrical; the 2-methacrylic feeding pipe 5 passes through the 2-methacrylic pipe 6 The cy...

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 present invention relates to a preparation method of 3-chloro-2-methyl-1-propene, and the above-mentioned technical purpose is solved by the following technical solution: the preparation method of 3-chloro-2-methyl-1-propene, which It is produced by chlorine gas and 2-methyl propylene, and chlorine gas and 2-methyl propylene are cross-contacted in the reactor after spraying out from their respective pipelines. The present invention adopts that two kinds of gases are ejected from the pipeline and cross-contacted in the reactor, so it has good contact, and the amount of substances of the two gases is easy to control, so that the target of the reaction is enhanced, and the cross-contact time of the gases It has the characteristics of short reaction time, small side reactions and high yield.

Description

technical field [0001] The present invention relates to a preparation method of 3-chloro-2-methyl-1-propene, in particular to an industrial method for preparing 3-chloro-2-methyl-1-propene through chlorine gas and 2-methylpropene. Background technique [0002] 3-Chloro-2-methyl-1-propene (C4H7C1). Colorless transparent liquid. The boiling point is 72.2°C, the freezing point is below -80°C, the relative density is 0.9527, the refractive index is 1.4276, and the lightning -10°C (open cup) is slightly soluble in water and can be dissolved in various organic solvents. Toxicity: Oral LD50 for rats is 395mg / kg. [0003] 3-Chloro-2-methyl-1-propene, which is a fine chemical product obtained by reacting chlorine gas and 2-methylpropene as the main raw material and then rectifying the crude product. This product is an important organic intermediate, which can be widely used in the fields of medicine, pesticide, spices, synthetic materials and so on. It is the main raw material fo...

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
IPC IPC(8): C07C17/10C07C21/04B01J19/26
Inventor 丁凌
Owner 丁凌
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