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Petroleum resin hydrogenation process

author£ºadmin Date£º2017/1/6 17:37:21

Petroleum resin hydrogenation process according to the scale of production and product requirements of the different classification. Foreign petroleum resin hydrogenation process technology can be summarized as the following three.
(1) Slurry bed hydrogenation process. This process is usually intermittent, it can be continuous. Okazaki and other proposed direct production of hydrogenated petroleum resin method: the 100% petroleum cracking components of unsaturated hydrocarbons by distillation pretreatment (boron fluoride as catalyst), and cationic polymerization of petroleum resin products; and then added to the silicon Algae for the load 300 ¡æ cyclohexane solvent was added to the obtained crude product. After distilling and filtering, the catalyst was removed, and then 0.35% of antioxidant was added to the reaction mixture. The reaction was carried out under the same conditions as above. 1010, the temperature was slowly raised to 200C, and the solvent was removed (the degree of vacuum was 2.67 kPa). The petroleum resin synthesized by this process has good thermal stability, resistivity and lighter color.

(2) Fixed bed hydrogenation process. This process is 1 or 2 hydrogenation.
EASTMAN company in the United States used two-stage hydrogenation process (the first paragraph hydrogenation pressure of 2.0 ~ 3.5MPa, paragraph 2 hydrogenation pressure of 2.0 ~ 40.0MPa). After hydrogenation, the material is cooled and separated into the storage tank, and then refined by stripping, slicing and packaging. Yokoyama et al. [20] developed a 1-stage hydrogenation process using a medium pressure hydrogenation reactor. Petroleum resin is in the molten state into the trickle bed reactor [pressure 5.0 ~ 15.0MPa, temperature 260 ~ 320 ¡æ (through the outer wall of the reactor heat carrier to control), space velocity 0.1 ~ 2.0h-1] .

(3) Spray hydrogenation process. This law by the Japanese Arakawa Chemical Company development, and in 1985 to achieve industrialization. This process suspends the powdered catalyst on the bubble tray, resulting in a relatively good hydrogenation at low pressure. This process uses a special design to solve the problem of high viscous fluid flow, but there are also some shortcomings (such as high design requirements, equipment investment and difficult to control, etc.), it must be resin hydrogenation and product separation combined.

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