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Titanium polyester catalyst

A titanium-based polyester and catalyst technology, which is applied in the field of titanium-based polyester catalysts, can solve problems such as multiple side reactions, molecular chain breaks, and affecting the viscosity of polyester slices, and achieve a good hue effect

Active Publication Date: 2015-04-29
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 that the titanium-based polyester catalyst prepared from titanate and dihydric alcohol in the prior art causes more side reactions in the preparation of polyester slices, which breaks the molecular chain and affects the production of polyester. The problem of slice viscosity, providing a new titanium-based polyester catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of Catalyst A

[0034] Add 124 grams (0.4 moles) of calcium lactate and 28.4 grams (0.1 moles) of tetraisopropyl titanate into a reactor equipped with a stirrer, a condenser and a thermometer, and drop 12.4 grams (0.4 moles) of ethylene glycol into the reactor. mol), reacted at 70°C for 2 hours, the system was slightly turbid, added 53.2 g (0.2 mol) of tributyl phosphate, and reacted for 1 hour, at this time the system completely changed to a homogeneous clear liquid, and catalyst A was obtained.

[0035] Preparation of polyester

[0036] 500 grams of terephthalic acid and 316 grams of ethylene glycol and catalyst A (based on the amount of polyester produced, the weight of titanium atoms are 5ppm), mixed to form a slurry, added to the polymerization tank, and carried out esterification reaction, The esterification temperature is 230-255°C, the pressure is 0.25MPa, and the water generated by the reaction is discharged through a rectification device. After t...

Embodiment 2

[0040] Preparation of Catalyst B

[0041] Add 74 grams (0.4 moles) of zinc acetate into a reactor equipped with a stirrer, a condenser and a thermometer, then add 28.4 grams (0.1 moles) of tetraisopropyl titanate, and drop 12.4 grams of ethylene glycol into the reactor (0.4 mol), reacted at 70°C for 2 hours, the system was slightly turbid, added 28 g (0.20 mol) of trimethyl phosphate, and reacted for 1 hour, at this time the system completely changed to a homogeneous clear liquid, and catalyst B was obtained.

[0042] Preparation of polyester

[0043] Polyester was prepared by the same method as in Example 1, using Catalyst B as the catalyst (based on the amount of polyester produced) with a titanium atom weight of 5 ppm.

[0044] The test results are shown in Table 1.

[0045]

Embodiment 3

[0047] Preparation of Catalyst C

[0048] Add 103 grams (0.4 moles) of magnesium lactate to a reactor equipped with a stirrer, a condenser and a thermometer, then add 28.4 grams (0.1 moles) of tetraisopropyl titanate, and drop 12.4 grams of ethylene glycol into the reactor (0.4 mol), reacted at 70°C for 2 hours, the system was slightly turbid, added 35 g (0.20 mol) of triethyl phosphate, and reacted for 1 hour, at this time the system completely changed to a homogeneous clear liquid, and catalyst C was obtained.

[0049] Preparation of polyester

[0050] Polyester was prepared by the same method as in Example 1, using Catalyst C as the catalyst (based on the amount of polyester produced) and the weight of titanium atoms was 5 ppm.

[0051] The test results are shown in Table 1.

[0052]

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Abstract

The invention relates to a titanium polyester catalyst. The titanium polyester catalyst is mainly used for solving the problems of secondary reactions such as thermal degradation due to too high activity of the prepared titanium dihydric alcohol compound catalyst and relatively low viscosity of prepared polyester chips in the prior art. The problems are well solved by adopting the technical scheme that a reaction product of a titanium compound, a salt compound of at least one metal selected from Group IIA, VIIB and IIB in a periodic table of elements and at least one phosphate compound is used as a catalyst. The catalyst can be applied in the industrial production of the polyester.

Description

technical field [0001] The invention relates to a titanium series polyester catalyst. Background technique [0002] Polyethylene terephthalate (PET, hereinafter referred to as polyester) is the most produced variety in chemical fiber. Catalysts for polyester synthesis involve almost all main and subgroup elements except halogen elements and inert elements. At present, the polyester catalysts with more industrial application and research are mainly three series of catalysts: antimony, germanium and titanium. [0003] Antimony-based catalysts are currently the most commonly used catalysts. More than 90% of polyesters in the world are made of antimony acetate (SbAc3), antimony trioxide (Sb 2 o 3 ) and ethylene glycol antimony as catalysts. Since antimony is a heavy metal element and has certain toxicity, the preparation and treatment of antimony catalysts in the production process of polyester, the processing of polyester, and the use and recovery of polyester All processes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/85C08G63/16C08G63/183
Inventor 章瑛虹熊金根周文乐郁剑乙
Owner CHINA PETROLEUM & CHEM CORP
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