Method for producing C* petroleum resin with chlorine alumine acid ion liquid catalyzed polymerization

Abstract

The present invention provides a method for preparing C5 petroleum resin by catalyzed polymerization of chloroaluminate ionic liquid. The method is to add the C5 fraction into a dry airtight or inert gas-protected reactor, raise the temperature to 90-120°C, and add the C5 fraction under stirring. Chloroaluminate ionic liquid with a mass of 0.8-3.0% is polymerized at 120-150°C for 6-10 hours to obtain a viscous liquid; cool the viscous liquid at room temperature to solidify the viscous liquid into a brittle solid and crush it into an ultra-fine powder below 400 meshes, then soaked in 0.5% NaOH solution for 20-24 hours, then washed with distilled water until neutral, filtered to remove most of the water, and vacuum-dried at 80°C and 150°C for 3 hours respectively to obtain Light colored C5 petroleum resin. The invention overcomes the phenomenon that the use of solid AlCl3 as a catalyst easily causes sudden polymerization and kettle overflow, the reaction process is mild, the reaction is easy to control, and the obtained C5 petroleum resin product has stable performance and light color.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and relates to a kind of chloroaluminate ionic liquid catalytic polymerization to prepare light-colored C 5 Petroleum resin method. Background technique [0002] C 5 Petroleum resin is cracked C by-product of ethylene plant 5 Distillation is the resin obtained after separation and polymerization of raw materials. due to C 5 The composition of fractions is complex, and it changes with the changes of cracking raw materials, cracking depth, cracking equipment and other factors. The composition of different sampling times also varies greatly, which makes the quality control of petroleum resins quite difficult. How to effectively control the softening point and reduce the hue of petroleum resin products during polymerization and post-treatment is the key to stabilizing and improving product quality. Currently C 5 Petroleum resin production mostly uses pure anhydrous AlCl 3 or BF 3 The die...

AI Technical Summary

Problems solved by technology

Currently C 5 Petroleum resin production mostly uses pure anhydrous AlCl 3 or BF 3 The diethyl ether complex is a catalyst. Because the activity of the catalyst is too high, the cationic catalytic polymerization reaction is an exothermic reaction. If the heat of reaction cannot be removed in time, the reaction temperature will be too high, which will not only increase the volatilization loss of the reaction material, reduce the polymerization yield, but also make the The increase of the reaction rate will deepen the hue of the petroleum resin product and affect the quality of the product; at the same time, a large amount of gel will be generated, which will reduce the yield and softening point of the resin, and the hue will also be dark

[0003] Use solid AlCl 3 As a catalyst, there are many problems in production: 1. The polymerization time is too long, about 10 to 12 hours; 2. It is easy to cause sudden polymerization and overflow; 3. The consumption of catalyst is large; 4. The moisture content of raw materials Need to adjust with batch