Modified m-pentadiene hydrogenated petroleum resin and preparation method thereof

Abstract

The invention discloses modified m-pentadiene hydrogenated petroleum resin and a preparation method thereof. According to the invention, a furan compound is added in the polymerization process of m-pentadiene for modification; the method comprises the following steps: enabling an obtained m-pentadiene modified petroleum resin polymerization liquid to pass through a proper catalyst bed layer, directly polymerizing residual trace diolefins under proper process conditions, adsorbing toxic substances such as sulfur, chlorine and the like, and performing catalytic hydrogenation treatment on the m-pentadiene modified petroleum resin to obtain the m-pentadiene modified hydrogenated petroleum resin. According to the method disclosed by the invention, the high-quality modified m-pentadiene hydrogenated petroleum resin with good compatibility and light color is obtained while the limit requirements of the petroleum resin hydrogenation process on the toxic substance content of the raw materials are met, the service life of the catalyst is prolonged, the stability of the catalyst is improved and the energy consumption and equipment investment are reduced.

Description

technical field [0001] The present invention relates to a modified piperylene hydrogenated petroleum resin and its preparation method, in particular to the modification of piperylene through the polymerization process and the post-treatment of piperylene modified petroleum resin polymer solution by using piperylene as raw material To remove poisons harmful to petroleum resin hydrogenation in reactants, to prepare high-quality modified piperylene hydrogenated petroleum resin with good compatibility and light color and a preparation method thereof. Background technique [0002] With the popularization of the concept of environmental protection and the upgrading of terminal products, the adjustment of the national industrial structure, the transformation and upgrading of the coating and adhesive industries, the market demand for high-quality petroleum resin, that is, hydrogenated petroleum resin, has increased, and more production High quality petroleum resin is imperative. At...

AI Technical Summary

Problems solved by technology

The combined petroleum resin hydrogenation method has obvious deficiencies in terms of production cost, product stability, and actual operation, such as high cost of hydrodesulfurization and dechlorination, and poor treatment effect; the quality of hydrogenation products varies with the quality of raw materials. Fluctuation occurs; the combination process is complicated, the equipment cost is high, etc.

In addition, the current production process of piperylene petroleum resin is a batch or semi-continuous process

Adopt existing technology, in the piperylene modified petroleum resin polymerization liquid, not only unavoidable generation of oligomer colloid, and because piperylene cannot be completely converted, a small amount of piperylene remains in the polymerization product, plus Other unsaturated hydrocarbons contained in the raw material, the above-mentioned substances are easy to polymerize and coke during the hydrogenation reaction

The coke produced by coking covers the surface of the catalyst and deposits in the pores of the catalyst, resulting in a decrease in the activity of the catalyst

In order to solve this type of problem, the measures taken in the prior art are to separate the above-mentioned substances through rectification and stripping before carrying out the resin hydrogenation reaction, and also separate the solvent together with it. The cycle accumulation of the polymer resin makes the branching of the polymer resin more serious, which increases the difficulty of hydrogenation of the subsequent petroleum resin

[0004] It can be seen that there is no simple and effective method in the prior art to remove the poisonous substances harmful to the hydrogenation of petroleum resin in the reactants, and the polymerized petroleum resin needs to be subjected to complicated pretreatment before further hydrogenation reaction can be carried out.

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