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Titanium polyester catalyst for preparing polyester

A titanium-based polyester and catalyst technology, which is applied in the field of titanium-based polyester catalysts, can solve the problems of poor light stability and storage stability, etc.

Active Publication Date: 2011-01-12
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 problem to be solved by the present invention is the problem of poor light stability and storage stability of liquid titanium-based polyester catalysts in the prior art, and a new titanium-based polyester catalyst for preparing polyester is provided

Method used

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  • Titanium polyester catalyst for preparing polyester
  • Titanium polyester catalyst for preparing polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of Catalyst A

[0034] 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.

[0035] Place the dried white powdery substance in a reactor with a stirrer, a condenser and a thermometer, add 50 grams of ethylene glycol, 32 grams of 25% aqueous sodium hydroxide solution (0.2 moles), magnesium acetate tetrahydrate 21.4 gram (0.1 mole), 21 grams (0.1 mole) of citric acid monohydrate, and 14 grams (0.1 mole) of trimethyl phosphate were reacted for 2 hours at a reaction temperature of 150° C. to obtain a nearly colorless homogeneous liquid, which was catalyst A.

[0036] Preparation of polyester ...

Embodiment 2

[0040] Catalyst A was placed under strong sunlight and irradiated continuously for 3 months. No change in the color and appearance of the catalyst was found. The catalytic performance was tested again. The results are shown in Table 1.

Embodiment 3

[0042] Catalyst A was placed in the room without being protected from light for one and a half years, and no change in the color and appearance of the catalyst was found. The catalytic performance was tested again, and the results are shown in Table 1.

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Abstract

The invention relates to a titanium polyester catalyst for preparing polyester, which mainly solves the problems of the low storage stability and easy color changing under illumination of a liquid-state titanium polyester catalyst and the low stability and poor hue of the prepared polyester in the conventional technology. The titanium polyester catalyst for preparing the polyester adopted in the invention comprises a reaction product prepared from the following raw materials at the reaction temperature of between 0 and 200 DEG C for 0.5 to 10 hours: (A) a titanium compound having the following general formula: Ti(OR)4, wherein R is selected from alkyl having 1 to 10 carbon atoms; (B) dihydric alcohol having 2 to 10 carbon atoms; (C) at least one metal compound of IA selected from a periodic table of elements; (D) at least one metal compound selected from IIA, IB, IIB, VIIB and VIII in the periodic table of the elements; (E) at least one aliphatic organic acid selected from organic acids; and (F) at least one phosphate compound selected from a phosphorus compound. The technical scheme solves the problems well and can be used in the industrial production of the polyester.

Description

technical field [0001] The invention relates to a titanium series polyester catalyst used for preparing polyester. Background technique [0002] Polyethylene terephthalate (hereinafter referred to as polyester) is an important industrial raw material. Due to its various excellent properties, it can be widely used in fibers, bottles, films and other materials. It is the largest variety of synthetic fibers. It also has very important uses in engineering plastics and other industrial fields. [0003] Catalyst is an important link in the polyester production process. At present, the polyester catalysts with more industrial production and research are mainly three series of catalysts: antimony, germanium and titanium. Among them, antimony series catalysts are most commonly used in polyester industrial equipment ( including Sb 2 o 3 , SbAc 3 and ethylene glycol antimony, etc.), at present, more than 90% of the polyesters in the world are produced by antimony-based catalysts, a...

Claims

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Application Information

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IPC IPC(8): C08G63/85C08G63/83C08G63/183
Inventor 周文乐熊金根郁剑乙章瑛虹
Owner CHINA PETROLEUM & CHEM CORP
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