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

Method for preparing chlorinated polypropylene by heterogeneous mixed solvent method

A technology of chlorinated polypropylene and mixed solvents, which is applied in the field of industrialized production of chlorinated polypropylene, can solve the problems of reducing the reaction temperature and pressure of the solvent method, and achieve the effects of cost-environmental friendliness, low cost, and reduction of reaction temperature and pressure

Inactive Publication Date: 2008-12-31
BEIJING UNIV OF CHEM TECH
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, chloroform is used to prepare polypropylene particles for reaction and chlorinated polypropylene as a dissolved product, and water is used to absorb the hydrogen chloride of chlorination reaction and can prevent the reaction of chloroform and chlorine gas. This method combines the solvent method and aqueous phase of chlorinated polypropylene. The organic combination of the suspension method not only overcomes the problem of uneven chlorination of the aqueous suspension method, but also greatly reduces the reaction temperature and pressure of the traditional solvent method, and at the same time protects the solvent from being chlorinated by chlorine.

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 chlorinated polypropylene by heterogeneous mixed solvent method
  • Method for preparing chlorinated polypropylene by heterogeneous mixed solvent method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]Put 1200kg (800L) of chloroform, 24kg of isotactic polypropylene and 0.6kg of Span80 into the 2000L enamel reaction kettle A, then, in the stirring state, raise the temperature of the material in the kettle to 100°C, and keep it warm at this temperature for 1 hours to completely dissolve the polypropylene in chloroform. While reactor A was warming up and kept warm, 1200kg (800L) of chloroform and 0.6kg of Span80 were dropped into reactor B, and the room temperature was kept for use. After the material in the reactor A is kept warm, press the chloroform in the reactor B into the reactor A with compressed air. At this time, the temperature of the material in the reactor A will drop to between 50°C and 55°C. The form precipitated from chloroform. Maintain the temperature at 50° C., then put 0.12 kg of azobisisobutyronitrile and 5% 60 kg (60 L) of dilute hydrochloric acid into the reactor and stir for 15 minutes, then feed 16 kg of chlorine into the reactor. After the reac...

Embodiment 2

[0025] Put 960kg (640L) of chloroform and 140kg of isotactic polypropylene into a 2000L enamel reaction kettle A, then, in a stirring state, raise the temperature of the material in the kettle to 115°C, and keep it warm at this temperature for 3 hours to make the poly Propylene was completely dissolved in chloroform. While reactor A was warming up and kept warm, 960 g (640 L) of chloroform was dropped into reactor B, and the room temperature was kept for use. After the material in the reactor A is kept warm, press the chloroform in the reactor B into the reactor A with compressed air. At this time, the temperature of the material in the reactor A will drop to between 55°C and 60°C. The form precipitated from chloroform. Maintain the temperature at 55°C. Then put 0.7kg of azobisisobutyronitrile and 320kg (320L) of water into the reactor and stir for 15 minutes, then feed 156kg of chlorine gas into the reactor for reaction. After the reaction was finished, the unreacted chlori...

Embodiment 3

[0027] Put 1050kg (700L) of chloroform, 210kg of syndiotactic polypropylene and 10.5kg of Span80 into the 2000L enamel reaction kettle A, then, in the stirring state, raise the temperature of the material in the kettle to 130°C, and keep it warm at this temperature for 6 hours to completely dissolve the polypropylene in chloroform. While reactor A was warming up and kept warm, 840kg (560L) of chloroform and 8.4kg of Span80 were dropped into reactor B, and the room temperature was kept for use. After the material in the reactor A is kept warm, use compressed air to quickly press the chloroform in the reactor B into the reactor A. At this time, the temperature of the material in the reactor A will drop to between 65°C and 70°C. The form is precipitated from chloroform. Continue to reduce the temperature to 61.5°C, then add 0.63kg of benzoyl peroxide and 630kg (630L) of water into the reactor and stir for 25 minutes, then feed 420kg of chlorine into the reactor to react. After ...

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

A method for preparing chlorinated polypropylene through heterogeneous component solvent belongs to chemical field of polymer modification. The method includes the following steps: putting polypropylene and Span80 into a reaction kettle which is added with chloroform; blending and heating the mixture to 100-150 DEG C and then thermally insulating for 1-10 hours; wherein the polypropylene is 1-20% the weight of chloroform and the Span80 is 0-1%the weight of chloroform; after thermal insulation, adding chloroform with the same amount and the same concentration as the Span80 into the reaction kettle, after which the temperature will drop to below 70 DEG C and polypropylene particulates will be separated out; adding water and evocating agent into the reaction kettle, blending the mixture to be even and introducing chlorine when the temperature is between 40 DEG C and 61.5 DEG C; after the reaction, blowing out the unreacted chlorine through compressed air or nitrogen gas; post-processing the chloride solution to get chlorinated polypropylene which contains 25-50wt% chlorine. The dissolution liquid of the finished product of the chlorinated polypropylene is clear and bright with no suspension or sediment. The method is simple and is pollution-free and low in cost and solves the problem that chloroform can not replace carbon tetrachloride to heterogeneously produce chlorinated polypropylene under low temperature.

Description

technical field [0001] The invention relates to the field of polymer modification chemical industry, and relates to a new method for industrial production of chlorinated polypropylene. It is characterized by the principle and industrialization method of preparing chlorinated polypropylene under heterogeneous conditions by using polypropylene fine particles prepared from industrial polypropylene pellets and chloroform and chlorine gas as raw materials, and using chloroform and water as mixed solvents. Background technique [0002] Chlorinated polypropylene is a chlorinated high polymer obtained by chlorinating polypropylene, which is mainly used in the production of composite inks, adhesives and anti-corrosion coatings. At present, the industrial production of chlorinated polypropylene adopts the solvent method production process. This method is to dissolve polypropylene in carbon tetrachloride at a temperature of 120 ° C and a pressure of 0.2 MPa, and then dissolve it in the...

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): C08F8/22C08F110/06
Inventor 李春喜陆颖舟孙爱军谭魁龙朱沛
Owner BEIJING UNIV OF CHEM TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com