Dicyclopentadiene hydrogenated petroleum resin and preparation method thereof

Abstract

The invention discloses dicyclopentadiene hydrogenated petroleum resin and a preparation method thereof. The temperature, the material concentration and the material distribution uniformity of the polymerization reaction are controlled by adopting a multi-section continuous polymerization mode, so that the content of impurities such as gel in the obtained petroleum resin polymerization liquid meets the hydrogenation reaction requirements. Besides, after polymerization, an obtained petroleum resin polymerization liquid is enable to pass through a proper catalyst bed layer, trace diolefins in the petroleum resin polymerization liquid is directly polymerized under proper process conditions, poison of petroleum resin hydrogenation is removed, and the obtained petroleum resin can be directly subjected to hydrogenation reaction. According to the dicyclopentadiene hydrogenated petroleum resin and the preparation method thereof provided by the invention, the product quality and the reaction yield can be improved, meanwhile, impurities such as gel are prevented from being generated, the content of impurities such as trace diolefins is reduced, the service life of a subsequent hydrogenationreaction catalyst is prolonged, and the hydrogenation efficiency is improved.

Description

technical field [0001] The invention relates to a dicyclopentadiene hydrogenated petroleum resin and a preparation method thereof, in particular to a method for preparing the hydrogenated petroleum resin by solving the poison problem of petroleum resin hydrogenation by controlling the polymerization process and post-polymerizing post-treatment. Background technique [0002] With the popularization of the concept of environmental protection and the upgrading of end products, the adjustment of the national industrial structure, and the transformation and upgrading of the coating and adhesive industries, the market demand for high-quality petroleum resins, that is, hydrogenated petroleum resins, has increased, and more high-quality petroleum resins have been produced. Quality petroleum resin is imperative. At present, the high-quality petroleum resin in the international market has a chroma of less than 2# and a softening point above 100°C, and is generally obtained by hydrogen...

AI Technical Summary

Problems solved by technology

These existing technologies all have certain effects, but there are obvious deficiencies in production cost, product stability (fluctuating with the resin raw material used for hydrogenation) and practical operations, such as the higher cost of hydrodesulfurization, which is harmful to the gel The treatment effect is not good; the combination process is complicated and the cost is high

In addition, for the polymerization reaction of DCPD, the existing tank and tower reactors are used as production equipment. Not only the oligomer gel is inevitably produced in the polymerization liquid, but also because DCPD cannot be completely converted, a small amount of DCPD remains in the polymerization product. , plus other unsaturated hydrocarbons brought by the bicyclic raw material, they are easy to polymerize and coke during hydrogenation reaction, and the coke 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, these components are separated by rectification and stripping before hydrogenation in the prior art, and the solvent is also separated from it (solvent boiling point is lower than or close to DCPD). This method not only has high energy consumption, but also The cyclic accumulation of unsaturated hydrocarbons has a certain impact on product quality

[0004] This shows that there is no simple and effective method in the prior art to solve the problem of poisons (impurities such as gel, sulfur and diolefins) in the petroleum resin hydrogenation reaction material, and all need to carry out complicated pretreatment to the petroleum resin after polymerization. Can be further hydrogenated

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