Unlock instant, AI-driven research and patent intelligence for your innovation.

Load catalyst containing ferric bromide and use thereof

A technology of supporting catalysts and ferric bromide, applied in the field of polymer synthesis, can solve problems such as catalyst separation difficulties, achieve good industrialization prospects, high economic and social benefits, and avoid separation difficulties

Inactive Publication Date: 2005-07-06
SHANGHAI JIAOTONG UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing atom transfer radical polymerization (ATRP) catalyst has separation difficulties, and proposes a supported catalyst containing ferric bromide, which can be used to catalyze the controlled free radical polymerization of olefins, and can prepare specified molecular weight, Homopolymers and copolymers with specified chain structure and narrow distribution, and have the characteristics of easy catalyst separation and low residual amount after the reaction

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Wash the sodium-type high specific surface cross-linked polyacrylic acid ion exchange resin with 1-5% lye, then wash it with deionized water until pH=9, dry it in vacuum at 80°C, pulverize it in a ball mill, and then dry it in vacuum Get PAA(Na) powder.

[0023] (2) Mix 1 part of iron tribromide FeBr in molar ratio 3 After dissolving in 10 parts of methanol, add 10 parts of PAA(Na), stir and reflux at 70°C for 3 hours, remove methanol and vacuum dry to obtain PAA-FeBr 3 Crude. The crude product was eluted with methanol until it was colorless, and after vacuum drying, PAA-FeBr 3 .

[0024] (3) get anhydrous ferrous bromide (FeBr 2 ), PAA-FeBr 3 And PAA (Na) powder, molar ratio FeBr 2 : PAA-FeBr 3 : PAA (Na) = 1: 30: 4000 ratio mixing, can form the supported catalyst containing ferric bromide. Among them, the amount of PAA (Na) powder is calculated according to the content of carboxyl groups in the dry weight resin, PAA-FeBr 3 The dosage is calculated accordi...

Embodiment 2

[0027] (1) After washing the high specific surface cross-linked polyacrylic resin with water, passing through an excessive amount of 2% NaOH solution, washing with deionized water until pH = 9, drying in vacuum at 80°C, pulverizing in a ball mill, and drying in vacuum to obtain PAA(Na) powder.

[0028] (2) Mix 1 part of iron tribromide FeBr in molar ratio 3 After dissolving in 10 parts of methanol, add 10 parts of PAA(Na), stir and reflux at 70°C for 3 hours, remove methanol and vacuum dry to obtain PAA-FeBr 3 Crude. The crude product was eluted with methanol until it was colorless, and after vacuum drying, PAA-FeBr 3 .

[0029] (3) Take FeBr 2 , PAA-FeBr 3 And PAA(Na) powder, mixed according to the molar ratio of 1:30:300, can form the supported catalyst containing ferric bromide. Among them, the amount of PAA (Na) powder is calculated according to the content of carboxyl groups in the dry weight resin, PAA-FeBr 3 The dosage is calculated according to the content of Fe...

Embodiment 3

[0032] (1) After washing the high specific surface cross-linked polyacrylic resin with water, passing through an excessive amount of 2% NaOH solution, washing with deionized water until pH = 9, drying in vacuum at 80°C, pulverizing in a ball mill, and drying in vacuum to obtain PAA(Na) powder.

[0033] (2) Mix 1 part of iron tribromide FeBr in molar ratio 3 After dissolving in 10 parts of methanol, add 10 parts of cross-linked acrylic acid ion exchange resin powder, stir and reflux at 70°C for 3 hours, remove methanol and vacuum dry to obtain PAA-FeBr 3 Crude. The crude product was eluted with methanol until it was colorless, and after vacuum drying, PAA-FeBr 3 .

[0034] (3) Take FeBr 2 , PAA-FeBr 3 And PAA (Na) powder, molar ratio FeBr 2 : PAA-FeBr 3 : PAA (Na) = 1: 20: 4000 ratio mixing, can form the supported catalyst containing ferric bromide. Among them, the amount of PAA (Na) powder is calculated according to the content of carboxyl groups in the dry weight resi...

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

PropertyMeasurementUnit
molecular weight distributionaaaaaaaaaa
molecular weight distributionaaaaaaaaaa
molecular weight distributionaaaaaaaaaa
Login to View More

Abstract

A ferric bromide-containing loaded catalyst and its application, using high specific surface cross-linked polyacrylic acid ion exchange resin powder as the catalyst's loaded carrier, and complexing with ferrous bromide and ferric bromide, wherein ferrous bromide Iron is the active component in the catalyst, and iron bromide is the passivation component in the catalyst. The supported catalyst forms a solid-liquid reaction system together with an initiator, a monomer, and a solvent for controlled free radical polymerization. After the reaction, the product can be simply separated, and the catalyst can be recycled after being activated. The ferric bromide-containing supported catalyst of the invention can prepare homopolymers and copolymers with specified molecular weight, specified chain structure and narrow distribution, and has the characteristics of easy catalyst separation and low residual amount after the reaction.

Description

technical field [0001] The invention relates to a supported catalyst containing iron bromide and its application. Homopolymers and copolymers with specified molecular weight, specified chain end structure and narrow distribution can be prepared by using this catalyst. The reaction system only needs simple centrifugal separation The catalyst can be removed. The invention belongs to the technical field of polymer synthesis. technical background [0002] Living polymerization is an important means to achieve molecular design and synthesize polymers with specific structures and properties. Due to the harsh reaction conditions of commonly used living polymerization methods, such as anionic polymerization, cationic polymerization, and group transfer polymerization, there are fewer applicable monomers. In contrast, free radical polymerization has a wide application prospect because it can adapt to a wide range of monomers, the conditions are mild, and the requirements for a small...

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): C08F2/02C08F20/10
Inventor 李忠辉张永明刘燕刚薛敏钊
Owner SHANGHAI JIAOTONG UNIV