Method for preparing light-color pentadiene petroleum resin

A technology for petroleum resin and piperylene, which is applied in the field of synthesizing light-colored petroleum resins, can solve the problems of increased product cost, complicated hydrogenation process, dark product color, etc., and achieves stable reaction process, narrow molecular weight distribution, and small color number. Effect

Active Publication Date: 2012-03-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the current technical level, its softening point can be increased to above 100°C, but due to the high temperature in its preparation process, it will inevitably cause the product to have a darker color
Although its color can be improved by hydrogenation and other technological means, the hydrogenation process is very complicated and increases the product cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 130g of piperylene in a reaction vessel, add 130g of toluene at the same time, after stirring evenly, add 2g of trichlorotriethyldialuminum catalyst and stir evenly. Heat to reflux, maintaining stirring and heating. After the temperature of the reaction system rises to 70°C, keep the temperature for 3-9 hours. Heating was then stopped, and after the reaction system had cooled to room temperature, 45 ml of 8% lye was added to terminate the reaction. The reaction mixture was then transferred to a separatory funnel to separate out alkaline water, and then washed with distilled water until neutral. The resin containing the solvent is transferred to a flask, and the solvent is distilled off under reduced pressure at 180-350° C. to obtain the piperylene petroleum resin with low color number. The resin has the following properties:

[0018] Softening point: 90°C

[0019] Color number: 3

[0020] Yield: 60%

Embodiment 2

[0022] Take 130g of piperylene in a reaction vessel, add 140g of p-xylene at the same time, after stirring evenly, add 2g of trichlorotriethyldialuminum catalyst and stir evenly. Heat to reflux, maintaining stirring and heating. After the temperature of the reaction system rises to 80°C, keep the temperature for 3-9 hours. Afterwards, the heating was stopped, and after the reaction system dropped to room temperature, 45 ml of 8% alkaline water was added to terminate the reaction. The reaction mixture was then transferred to a separatory funnel to separate out alkaline water, and then washed with distilled water until neutral. The resin containing the solvent is transferred to a flask, and the solvent is distilled off under reduced pressure at 180-350° C. to obtain the piperylene petroleum resin with low color number. The resin has the following properties:

[0023] Softening point: 95°C

[0024] Color number: 2

[0025] Yield: 83%

Embodiment 3

[0027] Take 130g of piperylene in a reaction vessel, add 140g of o-xylene at the same time, after stirring evenly, add 2g of trichlorotriethyldialuminum catalyst and stir evenly. Heat to reflux, maintaining stirring and heating. After the temperature of the reaction system rises to 80°C, keep the temperature for 3-9 hours. Afterwards, the heating was stopped, and after the reaction system dropped to room temperature, 45 ml of 8% alkaline water was added to terminate the reaction. The reaction mixture was then transferred to a separatory funnel to separate out alkaline water, and then washed with distilled water until neutral. The resin containing the solvent is transferred to a flask, and the solvent is distilled off under reduced pressure at 180-350° C. to obtain the piperylene petroleum resin with low color number. The resin has the following properties:

[0028] Softening point: 92°C

[0029] Color number: 3

[0030] Yield: 93%

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Abstract

The invention relates to a method for preparing light-color pentadiene petroleum resin. The method comprises the following steps of: adding pentadiene serving as a raw material and trichloro triethyl di-aluminum in an amount which is 0.3 to 3 percent of the mass of the pentadiene into a dried and closed reactor, stirring, heating to the temperature of between 30 and 90 DEG C, and performing polymerization reaction for 3 to 9 hours by taking the trichloro triethyl di-aluminum as a catalyst and methylbenzene, dimethylbenzene or tetrahydrofuran as a solvent to obtain viscous liquid; and washing to remove the catalyst by using 3 to 12 mass percent alkaline liquor, washing by using distilled water until the viscous liquid is neutral, and distilling at the temperature of between 180 and 350 DEG C to remove the solvent to obtain the light-color pentadiene petroleum resin, wherein a mass ratio of the pentadiene to the solvent is 1:(1-3). The prepared pentadiene petroleum resin has the advantages of small color number, moderate softening point, narrow molecular weight distribution and the like, and the preparation process is easy to operate.

Description

Technical field: [0001] The invention relates to a method for synthesizing light-colored (color number 2-3) petroleum resin by using toluene, xylene or tetrahydrofuran as a solvent and piperylene as a raw material, which belongs to the field of chemical industry. Background technique: [0002] A large amount of piperylene can be obtained by separation from the by-products of ethylene cracking, and piperylene petroleum resin can be obtained by cationic polymerization, which is widely used in road marking paints and various adhesives. With the current technical level, its softening point can be increased to above 100°C, but due to the high temperature in its preparation process, the product will inevitably have a darker color. Although its color can be improved by means of hydrogenation and other processes, the hydrogenation process is very complicated and increases the cost of the product. Therefore, if the light-colored piperylene petroleum resin can be prepared, it can not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F136/04C08F4/52
Inventor 杨成洁杜新胜潘广勤冯大鹏张春梅毛兵陈秀娣马斌张霖李亮徐惠俭邓廷昌柳彩霞常忠民
Owner PETROCHINA CO LTD
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