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Differential p-xylene preparation method

A para-xylene and differential technology, applied in the field of differential para-xylene preparation, can solve the problems of single xylene product and shortened service life, and achieve long interaction time, good deep integration and good anti-aging effect. Effect

Inactive Publication Date: 2018-09-04
ZHEJIANG MODERN TEXTILE IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the product of p-xylene has always been single and almost unchanged
[0004] In addition, these synthetic materials, which are closely related to people's life or production, are being used outdoors more and more. They need to withstand the erosion of various environmental factors such as sunlight, wind and rain, and air, and their service life is greatly reduced. shorten

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation method of differentiated p-xylene, comprising the steps of:

[0044] (1) the silver phosphate of 17 parts by weight, the bismuth vanadate of 18 parts, the rutile type titanium dioxide of 5 parts and the white carbon black of 3 parts and the concentration of 80 parts are 4wt% fluorosulfonic acid solution mixing , moved to a hydrothermal reactor, stirred continuously at 130°C and 0.3MPa pressure for 5h, then cooled naturally under stirring, ground with a liquid-phase high-energy ball mill at 45°C for 3.5h, filtered, and then heated at 515°C Calcined at ℃ for 5.5h, fully washed with deionized water, dried in vacuum at 90℃, ground for 5h with a ball mill, and sieved through 250 mesh to obtain a special anti-aging agent;

[0045] (2) P-xylene is added successively with p-xylene weight as 10% acetic acid, 2.5% o-xylene, 1.0% ethylamine co-solvent and 2.5% special anti-oxidant prepared by (1) under continuous stirring. Aging agent, then add 4% potassium hydrogen...

Embodiment 2

[0049] A preparation method of differentiated p-xylene, comprising the steps of:

[0050] (1) 15 parts by weight of silver phosphate, 20 parts of bismuth vanadate, 3 parts of rutile titanium dioxide and 4 parts of white carbon black are mixed with 70 parts of fluorosulfonic acid solution with a concentration of 4wt% , moved to a hydrothermal reactor, continuously stirred and reacted at 140°C and 0.2MPa pressure for 6h, then cooled naturally under stirring, ground with a liquid phase high-energy ball mill at 55°C for 3h, filtered, and then heated at 500°C Calcined for 6 hours, fully washed with deionized water, dried in vacuum at 80°C, ground for 6 hours with a ball mill, and sieved through 200 mesh to obtain a special anti-aging agent;

[0051] (2) P-xylene is added successively with p-xylene weight as 11% acetic acid, 1% o-xylene, 1.2% ethylamine co-solvent and 2% special anti-oxidant prepared by (1) under continuous stirring. Aging agent, then add 5% potassium hydrogen phos...

Embodiment 3

[0055] A preparation method of differentiated p-xylene, comprising the steps of:

[0056] (1) 20 parts by weight of silver phosphate, 15 parts of bismuth vanadate, 6 parts of rutile titanium dioxide and 2 parts of white carbon black are mixed with 90 parts of fluorosulfonic acid solution , moved to a hydrothermal reactor, continuously stirred and reacted at 110°C and 0.4MPa pressure for 4h, then cooled naturally under stirring, ground with a liquid phase high-energy ball mill at 35°C for 4h, filtered, and then heated at 530°C Calcined at low temperature for 5 hours, fully washed with deionized water, dried in vacuum at 95°C, ground for 4 hours with a ball mill, and sieved through 300 mesh to obtain a special anti-aging agent;

[0057] (2) P-xylene is added successively with p-xylene weight as 9% acetic acid, 4% o-xylene, 0.8% ethylamine co-solvent and 3% special anti-oxidant prepared by (1) under continuous stirring. Aging agent, then add 3% potassium hydrogen phosphate dispe...

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Abstract

The invention relates to a differential p-xylene preparation method. The method comprises the following steps: 1) mixing silver phosphate, bismuth vanadate, rutile titanium dioxide, white carbon blackand a fluosulfonic acid aqueous solution for a hydro-thermal reaction, and performing the steps of grinding, filtering, calcining, washing and drying on a mixture to obtain a special anti-aging agent; 2) employing p-xylene, acetic acid, o-xylene, acetamide and the special anti-aging agent obtained in the step 1); and 3) adding differential p-xylene mother liquor obtained in the step 2) in p-xylene in a spray form to prepare the differential p-xylene. The anti-aging function of a subsequent product prepared by the differential p-xylene can be obviously increased.

Description

technical field [0001] The invention belongs to the technical field of developing new varieties of p-xylene, and in particular relates to a preparation method of differentiated p-xylene. Background technique [0002] Dimethylbenzene is a colorless transparent liquid; it is a product in which two hydrogens on the benzene ring are replaced by methyl groups, and there are three isomers of ortho, meta and para. Of the three xylene isomers, para-xylene has the largest commercial market. Para-xylene (para-xylene), which can be abbreviated as "PX", is a derivative of benzene, an important chemical raw material, a colorless liquid, and becomes a flaky or columnar crystal at low temperature, insoluble in water, soluble in ethanol, ether, Benzene, acetone, flammable. P-xylene is a basic organic raw material, of which about 80% is used for the preparation of terephthalic acid and synthetic materials. These synthetic materials are widely used in various aspects of the national econom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08K13/06C08K3/22C08K3/36C08K3/32C08K3/24D01F6/92D01F1/10
CPCC08G63/183C08K3/22C08K3/24C08K3/32C08K3/36C08K13/06C08K2003/2241C08K2003/321D01F1/10D01F6/92
Inventor 陶仁中凌荣根韩文娟范艳苹胡克勤胡超杨晓静
Owner ZHEJIANG MODERN TEXTILE IND RES INST
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