Method for reducing pentadiene petroleum resin color number

A technology for petroleum resin and piperylene, applied in the field of preparing piperylene petroleum resin, can solve the problems of difficult control of polymerization reaction, deepening color number of petroleum resin, unstable product quality, etc., and achieves easy control and stable product quality. , the effect of stable quality

Active Publication Date: 2014-03-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water in raw materials and solvents consumes more catalyst, which increases the amount of catalyst used and reduces the catalytic activity
The polymerization reaction is difficult to control, the product quality is unstable, and it is easy to produce "scum", which reduces the yield of the resin. Color development (as can be seen from the ultraviolet spectrum), deepens the color number of petroleum resin, and degrades the quality

Method used

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  • Method for reducing pentadiene petroleum resin color number

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 30 grams of toluene (containing 0.3 grams of silicon tetrachloride) and 0.5 grams of aluminum trichloride catalyst, and add 100 grams of piperylene concentrate dried with silicon tetrachloride into the reactor. (Containing 1.0 g of silicon tetrachloride). Control the dropping rate, the dropping temperature is less than 20°C, the reaction temperature is 50°C, and the reaction time is 8h. Carry out one time of excessive alkaline washing, three times of water washing, and layering. After removing the catalyst from the upper layer, vacuumize at 210°C to obtain piperylene petroleum resin. The resin yield is 82%, the hue (Fe-Co) is ﹦3, and the softening point is 80°C. Treatment of the three wastes of alkaline water in the lower layer, and water use for primary, secondary and tertiary.

Embodiment 2

[0025] Add 30 grams of silicon tetrachloride dry solvent toluene (containing 0.6 grams of silicon tetrachloride) and 1.0 grams of aluminum trichloride catalyst into the reaction kettle. Add 100 grams of piperylene concentrate (containing 1.0 grams of silicon tetrachloride). G). Control the dropping rate, the dropping temperature is less than 20°C, the reaction temperature is 50°C, and the reaction time is 8h. Carry out one time of excessive alkali washing, three times of water washing, layering of excessive alkaline washing, and layering; the upper layer is vacuumed to remove the toluene solvent, and the piperylene petroleum resin is obtained. The resin yield reaches 86%, and the hue (Fe-Co)<4 , The softening point is 92℃. Treatment of the three wastes of alkaline water in the lower layer, using water in the first, second and third time.

Embodiment 3

[0027] Add 30 grams of toluene (containing 1.5 grams of silicon tetrachloride), 1.5 grams of aluminum trichloride catalyst, and 100 grams of piperylene concentrate (containing 1.0 of silicon tetrachloride) into the reaction kettle. G). Control the dropping speed, and the dropping temperature is less than 20°C. The reaction temperature is 50°C, and the reaction time is 8h. Carry out one time of excessive alkali washing, three times of water washing, and layering; the upper layer is vacuumed to remove the toluene solvent, and the piperylene petroleum resin is obtained. The resin yield reaches 89%, the hue (Fe-Co)≤4, and the softening point is 97°C. . Treatment of the three wastes of alkaline water in the lower layer, with primary, secondary and tertiary water reuse

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Abstract

The invention relates to a method for reducing pentadiene petroleum resin color number. The method is characterized in that C5 olefin fraction obtained by a C5 separation device is used as a raw material, the weight of pentadiene concentrate is 60-75 percent; silicon tetrachloride is used as a drying agent, solvents and aluminum chloride anhydrous serving as a catalyst are added to control the dropwise adding speed, and the dropwise adding temperature is less than 30 DEG C, the reaction temperature is 0-80 DEG C and the reaction time is 0.5-10h, so that pentadiene petroleum is prepared. According to the method, the using amount of the synthetic pentadiene petroleum resin catalyst and the resin color number are successfully reduced, and the problem that the color needs to be deepened when high-grade pentadiene petroleum resin is produced is solved, so that the quality of the pentadiene petroleum resin is stable, the process is controlled, and multi-grade requirement of clients is met, and the economic benefit is improved.

Description

Technical field [0001] The present invention relates to C 5 After the cyclopentadiene and isoprene are removed from the distillate, the 60-75% piperylene concentrate is obtained as the raw material, silicon tetrachloride is used as the desiccant, solvent and catalyst are added, and hydrogen chloride is generated instead of nitrogen. Protection, the method of preparing piperylene petroleum resin. Background technique [0002] In the process of petroleum cracking to produce ethylene, by-product C 5 The fraction accounts for 15%-20%, C 5 The distillate contains diolefins such as isoprene, cyclopentadiene and piperylene. These diolefins are chemically active and their main purpose is to make C 5 Aliphatic petroleum resins, which usually have the characteristics of light color, low density and high saturation, are widely used in adhesives, hot melt road marking paints, coatings, inks, rubber additives and other industries. [0003] Piperylene petroleum resin is generally prepared by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F240/00
Inventor 李正姜丹蕾周遵石付学红周亚婷王芳
Owner PETROCHINA CO LTD
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