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Method for preparing titanium series catalyst

A technology of titanium-based catalysts and titanium compounds, applied in the field of preparation of titanium-based catalysts, can solve problems such as poor solubility and poor hue of polyester

Inactive Publication Date: 2008-02-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem that the glycol compound titanium-based catalyst of titanium in the prior art has poor solubility in ethylene glycol and the obtained polyester hue is not good, and a new Preparation method of titanium series catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of Catalyst A

[0029] Add 12.4 grams (0.2 mol) of ethylene glycol in the reactor that stirrer, condenser and thermometer are equipped with, slowly drop into reactor 28.4 grams (0.1 mol) tetraisopropyl titanate, separate out white precipitate, After reacting at 70°C for 2 hours, the product was centrifuged, and the residue was washed with distilled water three times, and the product was vacuum-dried at 70°C. A white powdery substance was obtained.

[0030] The dried white powdery substance is placed in a reactor with a stirrer, a condenser and a thermometer, and 13.2 grams (0.2 moles) of lithium acetate, 28 grams (0.2 moles) of trimethyl phosphate and 200 grams of ethylene glycol are added , react at a reaction temperature of 150° C. for 3 hours until the system becomes a homogeneous liquid, and catalyst A is obtained.

[0031] Preparation of polyester

[0032] With 500 grams of terephthalic acid and 316 grams of ethylene glycol and catalyst A (based on t...

Embodiment 2

[0035] Add 24.8 grams (0.4 moles) of ethylene glycol in the reactor that stirrer, condenser and thermometer are equipped with, slowly drop into reactor 22.8 grams (0.1 moles) of tetraethyl titanate, separate out white precipitate, in After reacting at 70°C for 2 hours, the product was centrifuged, and the residue was washed with distilled water three times, and the product was vacuum-dried at 70°C. A white powdery substance was obtained.

[0036] The dried white powdery substance is placed in a reactor with agitator, condenser and thermometer, and 2.1 grams (0.02 moles) of sodium carbonate, 28 grams (0.2 moles) of trimethyl phosphate and 200 grams of ethylene glycol are added , reacted at a reaction temperature of 150°C for 3 hours until the system became a homogeneous liquid, and catalyst B was obtained.

[0037] Preparation of polyester

[0038] A polyester was prepared in the same manner as in Example 1, using Catalyst B as a catalyst (10 ppm by weight of titanium atoms b...

Embodiment 3

[0041]Add 36.9 grams (0.6 mol) of ethylene glycol in the reactor that stirrer, condenser and thermometer are equipped with, in reactor, slowly drip into tetraisopropyl titanate 28.4 grams (0.1 mol), separate out white precipitate, After reacting at 70°C for 2 hours, the product was centrifuged, and the residue was washed with distilled water three times, and the product was vacuum-dried at 70°C. A white powdery substance was obtained.

[0042] The dried white powdery substance is placed in a reactor with a stirrer, a condenser and a thermometer, and 1.64 grams (0.02 moles) of sodium acetate, 14 grams (0.1 moles) of trimethyl phosphate and 200 grams of ethylene glycol are added , react at a reaction temperature of 150° C. for 3 hours until the system becomes a homogeneous liquid, and catalyst C is obtained.

[0043] Preparation of polyester

[0044] A polyester was prepared in the same manner as in Example 1, using Catalyst C as a catalyst (10 ppm by weight of titanium atoms ...

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PUM

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Abstract

The invention relates to a titanium catalyst, mainly aiming to solve the problems of the diol compound of the titanium as a catalyst in the former technology, which has the problems of the low solubility in the ethylene glycol and the poor polyester color difference. The invention uses the technical proposal with the reaction between the titanium compound and diol and the reaction between the product of the precious reaction and the IA metal compound in the periodic table of elements to produce the titanium catalyst to solve the problems well; the invention can be used in the industrial production of the polyester.

Description

technical field [0001] The invention relates to a preparation method of a titanium series catalyst. Background technique [0002] Polyethylene terephthalate is an important industrial raw material, which can be widely used in fibers, sheets, films and other materials. [0003] The research on polyester catalysts has never stopped since the advent of polyester. At present, the polyester catalysts with more industrial production and research are mainly three series of catalysts: antimony, germanium and titanium. Among them, the most commonly used antimony series catalysts (including Sb 2 o 3 , SbAc 3 and ethylene glycol antimony, etc.), currently 90% of polyester in the world is produced by antimony catalysts. The disadvantages of antimony-based catalysts are: low activity; heavy metal catalysts pollute the environment; polymers are gray. The germanium-based catalyst has good stability, causes fewer side reactions during the reaction process, and produces a polyester with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/85
Inventor 沈志刚周文乐王荣伟陈丽娟赵薇薇
Owner CHINA PETROLEUM & CHEM CORP
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