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

Catalyst composition

A composition and catalyst technology, applied in the field of catalyst compositions, can solve the problems of deactivation of titanium-based catalysts, difficult esterification reaction, etc., and achieve the effects of inhibiting side reactions and inhibiting the generation of tetrahydrofuran

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the diesterization polymerization process, in the presence of aromatic dibasic acids, the side reaction of 1,4-butanediol (BDO) to THF is very severe, and THF can easily lead to the deactivation of titanium-based catalysts. , so that the esterification reaction is difficult to carry out effectively

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
  • Catalyst composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0024]According to a preferred embodiment of the present invention, the catalyst composition preferably includes:

[0025] Component a, component a is at least one chemical formula is RE (R 1 ) 3 The compound, wherein, RE RE is selected from lanthanum, cerium, praseodymium, neodymium or scandium, R 1 is selected from halogen, C 3 -C 6 Alkoxy, aryloxy including at least one benzene ring and / or naphthalene ring, acetylacetonate and R 2 COO-group (wherein, R 2 for C 1 -C 20 at least one of the alkyl groups);

[0026] Component b, component b is at least one of titanium alkoxide, antimony acetate, zinc acetate, oxides of zinc, oxides of antimony and oxides of titanium; and

[0027] Component c, component c is selected from dibutyltin oxide, methylphenyltin oxide, tetraethyltin, hexaethyltin oxide, hexacyclohexylditin oxide, di(dodecyl)tin oxide , Triethylhydroxytin, triphenylhydroxytin, triisobutyltin acetate, dibutyltin diacetate, diphenyltin dilaurate, monobutyltin tric...

Embodiment 1

[0035] This example is used to illustrate the catalyst composition provided by the present invention.

[0036] The catalyst used in this example contains 57.8% by weight of lanthanum stearate, 23.2% by weight of tetrabutyl titanate (purchased from Beijing Chemical Reagent Company), and 10.0% by weight of dibutyltin oxide (purchased from Beijing No. ) and 9.0% by weight of triphenylhydroxytin (purchased from Beijing Chemical Reagent Company).

[0037] Add 285.2g of terephthalic acid, 250g of 1,4-butanediol and 1.058g of the above-mentioned catalyst in a 2.5L reactor, stir and heat to reflux under a nitrogen atmosphere, adjust the temperature to 230°C and Reaction at high temperature for about 100 minutes, when the water generated by the reaction is completely evaporated, add 220g of 1,4-butanedioic acid and 200g of 1,4-butanediol, continue heating and stirring to reflux, adjust the temperature to 200°C and react at this temperature for about 100 minutes. When the water generat...

preparation example 1

[0039] The catalyst used in this preparation example contains 57.8% by weight of lanthanum stearate, 23.2% by weight of tetrabutyl titanate (purchased from Beijing Chemical Reagent Company), 10.0% by weight of dibutyltin oxide (purchased from Beijing No. ) and 9.0% by weight of triphenylhydroxytin (purchased from Beijing Chemical Reagent Company).

[0040] Add 285.2g of terephthalic acid, 250g of 1,4-butanediol and 1.058g of the above-mentioned catalyst in a 2.5L reactor, stir and heat to reflux under a nitrogen atmosphere, adjust the temperature to 230°C and React at high temperature for about 100 minutes. When the water generated by the reaction is completely distilled out, adjust the pressure in the reactor to below 200Pa, adjust the temperature to 240°C, and polycondense at this temperature and pressure for 7 hours to obtain a light yellow polymer. . The glass transition temperature of the polyester measured according to a differential scanning calorimeter (DSC) measureme...

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
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention relates to a catalyst composition, which comprises a component a, which is at least one compound with the chemical formula being RE(R1)3, wherein RE is a rare earth element, R1 is at least one of halogen, alkoxy, aryloxy, acetylacetone group and a R2COO- group, and R2 is C1-C30 alkyl; a component b, which is at least one compound or mixture of compounds with the chemical formulas being M(OR3)x1, M2Ox2 and M(-OOCR4)x3, wherein M is titanium, antimony or zinc, x1, x2 and x3 are respectively 2, 3 or 4, R3 is C1-C10 alkyl, and R4 is C1-C30 alkyl; and a component c, which is at leastone organic tin compound. The biodegradable polyester prepared from the catalyst composition has a large molecular weight, and the molecular weight distribution is more concentrated.

Description

technical field [0001] The present invention relates to a catalyst composition. Background technique [0002] At present, thermoplastic aromatic polyesters, which are widely used in industry and daily life, have excellent thermal stability and mechanical properties, are easy to process and low in price. Polyethylene terephthalate (PET), and polybutylene terephthalate (PBT), for example, have been widely used in the manufacture of fibers, films and containers. However, these aromatic polyesters are difficult to degrade after being used and discarded, and no obvious direct degradation of aromatic polyesters such as PET and PBT by microorganisms has been observed so far. In order to combine the excellent properties of aromatic polyesters, since the 1980s, those skilled in the art have devoted themselves to the research of synthesizing aliphatic-aromatic copolyesters, that is, introducing aromatic segments into aliphatic polyesters, which not only ensures the copolyester The p...

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): C08G63/86C08G63/84C08G63/85C08G63/83C08G63/183C08G63/16
Inventor 祝桂香张伟韩翎许宁
Owner CHINA PETROLEUM & CHEM CORP