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Titanium series catalyst

A titanium-based catalyst and catalyst technology, applied in the field of titanium-based catalysts, can solve the problems of poor polyester hue and poor solubility, etc.

Active Publication Date: 2008-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical question to be solved by the present invention is that in the prior art, there is a problem that the glycol compound titanium-based catalyst of titanium has poor solubility in ethylene glycol and the obtained polyester hue is not good, and a new one is provided. Titanium catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of Catalyst A

[0031] 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.

[0032] 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.

[0033] Preparation of polyester

[0034] With 500 grams of terephthalic acid and 316 grams of ethylene glycol and catalyst A (based on t...

Embodiment 2

[0037] 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.

[0038] 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.

[0039] Preparation of polyester

[0040] 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

[0043]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.

[0044] 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.

[0045] Preparation of polyester

[0046] 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 present invention is one technological scheme of titanium catalyst of the reaction resultant of titanium compound, diol and metal compound. The titanium catalyst of the present invention is superior to available similar catalyst, which has poor dissolubility in ethylene glycol and poor hue of the prepared polyester. The titanium catalyst is applied in industrial production of polyester.

Description

technical field [0001] The invention relates to 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 a good hue, but is expe...

Claims

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Application Information

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IPC IPC(8): C08G63/85
Inventor 周文乐沈志刚张惠明赵申章瑛虹
Owner CHINA PETROLEUM & CHEM CORP
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