Environment friendly polyester polycondensation catalyst and method for preparing polyester by using the same

A polycondensation catalyst, an environmentally friendly technology, applied in the field of polyester, can solve the problems of unsatisfactory catalytic activity and catalytic speed, no report on the preparation method of aluminum catalyst, and yellow hue of titanium catalyst polyester, and achieve excellent catalytic speed and excellent catalytic activity. , the effect of fast catalytic polycondensation

Active Publication Date: 2012-02-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ti-based catalysts were studied earlier, and inorganic titanium (potassium titanium oxalate, potassium fluorotitanate) and organic titanium (n-butyl titanate and isopropyl titanate) were used in the early stage. With the deepening of research, many have been developed in recent years. A variety of titanium series catalysts, such as the C94 of Acordis Company, the titanium catalysts of the brand EcocatB and EcocatT of Zimmer Company, the AC400 of ICI Synetix Company, AC300, AC240, etc., but all fail to solve the proble

Method used

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  • Environment friendly polyester polycondensation catalyst and method for preparing polyester by using the same
  • Environment friendly polyester polycondensation catalyst and method for preparing polyester by using the same
  • Environment friendly polyester polycondensation catalyst and method for preparing polyester by using the same

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1:

[0020] 10 grams of aluminum trichloride was dissolved in 90 grams of ethylene glycol. The solution was heated to 90°C. After stirring at this temperature for 10 minutes, 10 grams of 15% zinc acetate aqueous solution was added. After stirring for 30 minutes at 90°C, Warm up to 110°C, continue to stir for 50 minutes and then cool to room temperature, add 1.6 g of phosphoric acid and stir evenly to prepare an environmentally friendly polyester polycondensation catalyst for use; its structure is as follows:

[0021] Where X is Cl - , M is Zn.

[0022] Add 350 grams of terephthalic acid, 220 grams of ethylene glycol, and 1 gram of the liquid aluminum catalyst prepared by the above method into a 2L reactor, and esterify at 200~250℃ and pressure 0.25MPa (gauge pressure). When the effluent reaches 95% of the theoretical effluent, the esterification is finished, the pressure of the reactor is released to normal pressure, the pressure is gradually reduced and the temperat...

Example Embodiment

[0023] Example 2

[0024] 10 grams of aluminum acetate (one or more of aluminum monoacetate, aluminum diacetate, and aluminum triacetate) is dissolved in 90 grams of ethylene glycol, the solution is heated to 90°C, and stirring is continued at this temperature for 10 minutes before adding 5 G 15% zinc acetate aqueous solution, 3 g sodium acetate 15% solution, 1 g lithium acetate 15% aqueous solution, stirred at 90℃ for 35 minutes, heated to 110℃, continued stirring for 30 minutes, cooled to room temperature, added 2 One gram of trimethyl phosphate is stirred evenly to prepare an environment-friendly polyester polycondensation catalyst for use; its structure is as follows:

[0025]

[0026] Where X is CH 3 COO - , M is Zn, Na, Li.

[0027] Add 350 grams of terephthalic acid, 220 grams of ethylene glycol, and 1 gram of liquid aluminum catalyst prepared by the above method into a 2L reactor, and esterify at 205~250℃ and pressure 0.25MPa (gauge pressure). When the effluent reaches 95% ...

Example Embodiment

[0028] Example 3

[0029] 10 grams of aluminum glycol is dissolved in 90 grams of ethylene glycol. After heating the solution to 90°C, add 5 grams of 15% calcium acetate aqueous solution and 5 grams of cobalt acetate 15% solution. After stirring for 30 minutes at 90°C, the temperature is raised. After reaching 100°C and continuing to stir for 30 minutes, cool to room temperature and add 2.2 grams of phenyl phosphoric acid to prepare an environmentally friendly polyester polycondensation catalyst for use; its structure is as follows:

[0030]

[0031] Where X is HOCH 2 CH 2 O - , M is Ca or Co.

[0032] Add 350 grams of terephthalic acid, 220 grams of ethylene glycol, and 1 gram of the liquid aluminum catalyst prepared by the above method into a 2L reactor, and esterify at 203~255℃ and pressure 0.25MPa (gauge pressure). The esterification is finished when the effluent reaches 95% of the theoretical effluent, the pressure of the reactor is released to normal pressure, and the pressure...

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Abstract

The invention discloses an environment friendly polyester polycondensation catalyst and a method for preparing polyester by using the catalyst. The catalyst has a following structure, wherein, M represents doped metal ions, and X represents anions. The catalyst is prepared by the following steps: dissolving aluminium compound in glycol, adding an aqueous solution doped with metal salt at the temperature of 80-95 DEG C, stirring for 0.5-2 h at the temperature of 80-95 DEG C, then heating to 95-120 DEG C and stirring for 0.5-1 h, and finally adding stabilizing agent, phosphorous compound, and mixing uniformly. The stabilizing agent, phosphorous compound, and the aluminium compound can be separately added in the reaction system. The activity of the liquid aluminium catalyst is equal to that of the antimony catalyst, and the polyester hue of the liquid aluminium catalyst is equal to that of the antimony catalyst.

Description

technical field [0001] The invention belongs to the field of polyester, and in particular relates to an environment-friendly polyester polycondensation catalyst and its preparation method and application. Background technique [0002] Polyester (polyethylene terephthalate, referred to as PET), has excellent chemical and mechanical properties, is one of the most important synthetic fibers, and also has a wide range of applications in the fields of bottles, films and engineering plastics. application. [0003] Since the advent of polyester, research on polyester catalysts has never stopped. At present, there are mainly three series of catalysts in industrial production and research: Sb, Ge and Ti. Due to the good balance between the polymerization speed, polymer performance and polyester thermal degradation stability of Sb-based catalysts, more than 90% of the polymers Esters use Sb-based catalysts. However, since Sb is a heavy metal, it will inevitably cause adverse effect...

Claims

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Application Information

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IPC IPC(8): C08G63/84C08G63/83C08G63/183
Inventor 戴志彬夏峰伟
Owner CHINA PETROLEUM & CHEM CORP
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