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Method for synthesizing m-pentadiene petroleum resin by thermal polymerization

A technology for petroleum resin and piperylene, which is applied in the field of preparing piperylene petroleum resin, can solve the problems of high labor intensity, three wastes "pollution, influence on resin quality and application, etc., achieve high safety, improve economic benefits, The effect of easy continuous production

Active Publication Date: 2012-12-12
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned catalytic method has a fast reaction rate and mild conditions, and is currently the most widely used production process in industry. Its disadvantage is that the catalyst needs to be removed after the polymerization reaction is completed, but the removal of the catalyst is very critical, and if the removal is not clean, it will seriously affect Resin quality and application
Catalyst removal mainly includes alcohol washing method, water washing method, and liquid ammonia neutralization method. The common disadvantages of these methods are that the "three wastes" are seriously polluted and labor-intensive

Method used

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  • Method for synthesizing m-pentadiene petroleum resin by thermal polymerization
  • Method for synthesizing m-pentadiene petroleum resin by thermal polymerization

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Add piperylene concentrate (see Table 2 for composition), solvent in proportion to the reaction kettle, use N 2 Replace 3 to 4 times, start to heat up, and start stirring. Control the heating rate to 60-90°C / h, control the reaction temperature to 300°C, the pressure to 2.1MPa, and the reaction time to 4h. After the reaction is finished, flash evaporate to obtain the product piperylene petroleum resin, the yield of the resin reaches 80%, the hue (Fe—Co)≤4 and the softening point of 92° C. can be obtained.

[0019] Table 2 Piperylene Concentrate Component Table

[0020]

Embodiment 2

[0022] The experimental process and raw materials are the same as in Example 1, the reaction temperature is changed to 310° C., the pressure is 2.2 MPa, and the reaction time is 5 hours. After the reaction, the non-polymer is flashed off to obtain the product piperylene petroleum resin, the resin yield reaches 83%, the hue (Fe—Co)≤5 and the softening point of 94° C. can be obtained.

Embodiment 3

[0024] The experimental process and raw materials were the same as in Example 1, the reaction temperature was changed to 320° C., the pressure was 2.3 MPa, and the reaction time was 4 hours. After the reaction, the non-polymer is flashed out to obtain the product piperylene petroleum resin, the resin yield reaches 84%, the hue (Fe—Co)≤6 and the softening point of 97° C. can be obtained.

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Abstract

The invention relates to a method for synthesizing m-pentadiene petroleum resin by thermal polymerization. The method comprises the following step of: polymerizing a raw material, namely an m-pentadiene concentrate which is obtained by a C5 separation device and comprises less than or equal to 65 percent by mass of m-pentadiene in a C5 olefin fraction through free radicals to synthesize the m-pentadiene petroleum resin, wherein the thermal polymerization reaction temperature is between 280 DEG C and 400 DEG C, the reaction pressure is between 2.0 MPa and 3.0 MPa, and the reaction time is 2-8hours. A catalyst is not needed during production of the petroleum resin by thermal polymerization, so that the complex post-treatment process of the catalyst is eliminated, environmental pollution caused by the emission of wastewater is avoided, the yield of the resin is high, and continuous production is easy to realize. Compared with a catalytic polymerization method, the method has remarkableadvantages and is the development trend of a petroleum resin production technology.

Description

technical field [0001] The invention relates to a method for thermally polymerizing and synthesizing piperylene petroleum resin, especially prepared from the piperylene concentrate containing 60-70% after removing cyclopentadiene and isoprene from the C5 fraction as raw material Method for piperylene petroleum resins. Background technique [0002] Piperylene petroleum resin is generally prepared by cationic polymerization of piperylene, usually using Lewis acid catalysts such as metal or non-metal halides. Among these Lewis acids, the most widely used is AlCl 3 , because the single-component Lewis acid catalyst itself has certain limitations in the control of the reaction during the polymerization process. At this time, the polymerization reaction is a heterogeneous reaction, which makes the polymerization reaction difficult to control and the product quality is unstable. Therefore, in the reaction system The introduction of a composite catalyst can regulate the polymerizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F240/00
Inventor 周遵石付学红黄英超崔香淑李长途姜丹蕾王刚乔连成宋尚德张姝
Owner PETROCHINA CO LTD
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