Method for preparing m-pentadiene petroleum resin

Abstract

The invention provides a method for preparing an m-pentadiene petroleum resin. Pre-treated SiO2 is taken as a carrier, and AlCl3 is loaded to the SiO2 carrier to form an AlCl3 / SiO2 supported main catalyst; and liquid acid CH4O3 or H3PO4 is taken as a cocatalyst, and high reactivity and high selectivity of a target product are showed in the reaction. In the method, the process of the removal of a catalyst is simplified; meanwhile, the catalyst can be recycled after being filtered and separated, the environmental pollution is reduced, the method has the advantages of environment friendliness and the like, and the continuous production can be realized. The production cost is reduced; the problems that a large amount of wastewater is generated when the catalyst is removed, the post-treatment process is more complicated and the quality of products is low in the conventional process are solved; and the softening point of the obtained m-pentadiene petroleum resin is 95.3 to 103.5 DEG C, the Gardner chroma is 2 to 5, and the yield of the resin is 76.5 to 83.8 percent.

Description

technical field [0001] The invention relates to a preparation method of piperylene petroleum resin. Background technique [0002] C 5 Distillate is a by-product with a large output in the ethylene industry, accounting for 8% to 16% of ethylene output. In 2010, the total amount of cracking in China was nearly 1.5 million tons, and by 2015 it is expected to exceed 2 million tons. [0003] cleavage C 5 After separation, piperylene with a mass fraction of about 65% can be obtained. The main use of piperylene is to make high-grade aliphatic petroleum resin. This kind of resin generally has an average relative molecular mass between 1000 and 3000, and usually has the characteristics of light color, low density and high saturation. It is different from alicyclic C 5 Petroleum resin and C 5 and C 9 fractions of copolymer resins compared to other aliphatic C 5 Petroleum resin has better tackiness, thermal stability and lighter color, and is widely used in adhesives, hot-melt r...

AI Technical Summary

Problems solved by technology

[0005] According to public patents at home and abroad and relevant information reports, now, with the traditional AlCl 3 The process of synthesizing and polymerizing piperylene petroleum resin with a catalytic system is prone to emulsification when the catalyst is removed, and a large amount of waste water is generated, and the post-treatment process is more complicated (references: [1] Yu Tao, Ding Wei, Zhang Rongming. Preparation of light-colored C by complex catalyst 5 Petroleum Resin [J]. Progress in Chemical Industry, 2003, 22(5): 503~505. [2] Xiamei Hu. Application of Composite Catalytic System in the Synthesis of Piperylene Resin [J]. Jinshan Oil Chemical Fiber, 2002(2 ): 11~14. [3] WOJCIK R T.Cationic polymerization of piperylene using as the catalyst system an aluminum halide and an inorganic phosphoric acid: US, 4 098 982 [P]. 1978-07-04. [4] Zhang Chuntao , Xu Bokun. A production process of high-grade piperylene petroleum resin: CN, 101 134 797 [P]. 2008-03-05.)

Images