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Prepn and application of high-activity titanium catalyst

A titanium-based catalyst, high-activity technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effect of reducing catalytic activity, high activity, and improving quality

Inactive Publication Date: 2003-03-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies and defects of the prior art, the present invention provides a preparation method and application of a high-activity titanium-based catalyst, which can improve the reaction rate of esterification and polycondensation and eliminate antimony-based compounds in the process of catalyzing the synthesis of PET polyester. Existing environmental pollution problems, the polyester prepared by using this catalyst has a good hue and does not contain toxic metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Solution A was prepared by dissolving 10.80 g of titanium(IV) tetraisopropoxide (38 mmol) in 10 g of glycidyl methacrylate and 40 g of absolute ethanol. Mix 6.35g of distilled water and 50g of absolute ethanol to obtain solution B. First add solution A into the reactor, then add solution B once at room temperature to obtain a white precipitate. The white precipitate was suction filtered to remove the solvent, then washed twice with distilled water, and baked at 70°C for 1 hour to obtain organic acrylate-modified TiO 2 precipitation.

[0016] 2200g of terephthalic acid, 1100g of ethylene glycol and 0.11g of the catalyst were polymerized in a 5L stainless steel reactor. The esterification in this process is carried out under normal pressure, and the pressure in the kettle in the final stage of polycondensation should be kept below 80Pa. The obtained polyester has a hue L value of 88.30, a hue b value of 4.31, an intrinsic viscosity of 0.664, and a carboxyl content of 1...

Embodiment 2

[0018] Solution A was prepared by dissolving 10.80 g of titanium(IV) tetraisopropoxide (38 mmol) in 50 g of absolute ethanol. Mix 6.35g of distilled water with 50g of absolute ethanol to make solution B. First add solution A into the reactor, then add solution B once at room temperature to obtain a white precipitate. The white precipitate was suction filtered to remove the solvent, then washed twice with distilled water, and baked at 70°C for 1 hour to obtain TiO 2 precipitation. Dissolve the precipitate in 50g of glycidyl methacrylate, and ultrasonically treat it for 10 minutes to fully absorb the organic matter on the surface of the precipitate, then filter, wash the residue with distilled water, and bake it at 70°C for about 1 hour to obtain the organic acrylate Modified TiO 2 precipitation.

[0019] 2200g of terephthalic acid, 1100g of ethylene glycol and 0.22g of the catalyst were polymerized in a 5L stainless steel reactor. The esterification in this process is carr...

Embodiment 3

[0021] Solution A was prepared by dissolving 10.80 g of titanium(IV) tetraisopropoxide (38 mmol) in 50 g of absolute ethanol. Mix 6.35g of distilled water with 50g of absolute ethanol to make solution B. First add solution A into the reactor, then add solution B once at room temperature to obtain a white precipitate. The white precipitate was suction filtered to remove the solvent, then washed twice with distilled water, and baked at 70°C for 1 hour to obtain TiO 2 precipitation. Dissolve the precipitate in 50g of 10% KH560 ethanol solution, and ultrasonically treat it for 10 minutes to make the organic matters fully adsorbed on the surface of the precipitate, then filter, wash the residue with distilled water, and bake at 70°C for about 1 hour to obtain the organosilane-modified TiO 2 precipitation.

[0022] 2200g of terephthalic acid, 1100g of ethylene glycol and 0.165g of the catalyst were polymerized in a 5L stainless steel reactor. The esterification in this process ...

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Abstract

The present invention relates to polyester catalyst. The high-activity titanium catalyst is prepared through dissolving alcoholate of titanium in organic solvent, hydrolysis to obtain TiO2 deposit, washing and filtering, organically modifying TiO2 by setting the deposit in organic modifier solution to obtain modified TiO2. The catalyst is used in preparing saturated polyester resin with relative molecular weight smaller than 10,000 or thermoplastic polyester and copolyester with relative molecular weight greater than 10,000. The organic modifier modified TiO2 has high activity and no trouble of resulting in yellow polyester.

Description

technical field [0001] The invention relates to a preparation method and application of a catalyst, in particular to a preparation method and application of a highly active titanium series catalyst, belonging to the field of polyester catalysts. Background technique [0002] At present, polyester is widely used as a raw material for fabrics, packaging, industrial yarns and engineering plastics. Since the advent and industrialization, chemists have never stopped researching on various catalysts, but at present, most catalysts used in industrial production and research are mainly three series of compounds of Sb, Ge and Ti. Compounds using Ge, such as germanium dioxide, are expensive, generally US$1,000 / kg, which will significantly increase the manufacturing cost of polyester; compounds using Sb have low catalytic activity and tend to make polyester gray. cause environmental pollution. Ti-based catalysts have extremely high catalytic activity for the polycondensation process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J37/03
Inventor 古宏晨顾宇辉徐宏程存康吴亚妮黄伟蔡利强李元骥
Owner SHANGHAI JIAO TONG UNIV
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