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Ethylene glycol antimony acetate and its preparation method

A technology of ethylene glycol antimony acetate and antimony trioxide, which is applied in the preparation of carboxylates, chemical instruments and methods, antimony compounds, etc., can solve the problems of low product quality and production efficiency, difficult to meet production requirements, etc. Improve production efficiency, reduce dosage, easy to disperse

Inactive Publication Date: 2003-02-05
YONGXIN CHEM IND TIANJIN DEV AREA
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the polycondensation catalyst used by most polyester (PET) manufacturers at home and abroad is antimony trioxide or antimony acetate (code S-21), both of which are mono-based antimony salts, that is, antimony with a single functional group Salt, when they catalyze the polycondensation reaction, the product quality and production efficiency are low. With the continuous changes in the market of PET and its downstream products, it is difficult for them to meet the production requirements

Method used

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with embodiment:

[0010] 1. Add 235g of toluene, 55g of acetic anhydride, and 50g of antimony trioxide into the flask, stir, heat and reflux at 110°C for 3 hours, and filter it into another reaction flask under nitrogen protection, and wait to cool to 70°C , slowly add 21g of ethylene glycol under stirring, react for 1.5 hours, cool to 20°C, crystals are precipitated, separate the crystals, and dry at 25°C under nitrogen protection to obtain 80g of the finished product.

[0011] Elemental analysis data: composed of C, H, O and Sb (%):

[0012] Calculated value Measured value

[0013] C: 19.93 16.4~19.8

[0014] H: 2.91 2.8~2.9

[0015] O: 26.58 26~26.7

[0016] Sb: 50.58 49~50.5

[0017] 2. Add 380Kg of toluene, 90Kg of acetic anhydride, and 80Kg of antimony trioxide into the reactor, stir, heat and reflux at 120°C for 3.5 hours, and filter it into anoth...

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PUM

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Abstract

The present invention discloses an antimony-containing organic compound glycol antimony acetate and its preparation method. Its molecular formula is Sb2(CH3COO)2(OCH2CH2O)2, and its preparation method includes the following steps: adding solvent toluene or xylene, acetic anhydride and antimony trioxide in a reactor with reflux device, stirring heating, reflux reaction, under the protection of nitrogen gas filtering reactant and feeding it into another reactor, after the reactant is cooled, progresively adding glycol under the condition of stirring, reaction, cooling to separate out crystat; filtering crystal, drying under the protection of nitrogen gas to obtain white crystal glycol antimony acetate which can be used as catalyst for polyester polycondensation reaction, and its catalytic activity is high.

Description

technical field [0001] The invention relates to an antimony-containing organic compound and its preparation method, in particular to an acetate and its preparation method. technical background [0002] At present, the polycondensation catalyst used by most polyester (PET) manufacturers at home and abroad is antimony trioxide or antimony acetate (code S-21), both of which are mono-based antimony salts, that is, antimony with a single functional group Salt, when they catalyze the polycondensation reaction, the product quality and production efficiency are low. With the continuous changes in the market of PET and its downstream products, they have been difficult to meet the production requirements. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a kind of when polyester polycondensation reaction, make catalytic activity high, reduce ...

Claims

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Application Information

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IPC IPC(8): C01G30/00C07C51/41C07C53/10C07C59/245
Inventor 许世纯刘鸿逵
Owner YONGXIN CHEM IND TIANJIN DEV AREA
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