Method and device for purifying dicyclopentadiene

Abstract

The invention discloses a method and a device for purifying dicyclopentadiene, and belongs to the technical field of petrochemical engineering. According to the dicyclopentadiene purification device provided by the embodiment of the invention, when dicyclopentadiene is purified, a to-be-purified material is input from the first feeding hole of the decompression rectifying tower, first steam is sprayed from a fourth feeding hole, and the first steam can reduce the partial pressure of dicyclopentadiene in the decompression rectifying tower, so that dicyclopentadiene is separated from heavy components, wherein a first purified material and a second purified material are output from a first discharge port, a first other material and a second other material are output from a second discharge port, the first purified material and the second purified material mainly comprise dicyclopentadiene, and a first other material and a second other material mainly comprise residual components; whereinthe residual components comprise a C6 fraction, cyclopentadiene, other components and a heavy component, and the first purified material is output as a product, so that the separation of dicyclopentadiene and the heavy component is realized, and the yield of dicyclopentadiene is improved.

Description

technical field [0001] The invention relates to the field of petrochemical technology. In particular, it relates to a method and device for purifying dicyclopentadiene. Background technique [0002] Dicyclopentadiene, also known as dicyclopentadiene, is a dimer produced by Diels-Alder reaction of cyclopentadiene. When cyclopentadiene reacts to form dimer dicyclopentadiene, it may also form trimer and tetramer. Among them, cyclopentadiene is mainly derived from ethylene cracking products, and when ethylene is cracked to generate cyclopentadiene, C6 fraction and other components may also be generated. Therefore, when dicyclopentadiene is produced by ethylene, various impurity components will be produced, and dicyclopentadiene needs to be purified before dicyclopentadiene is exported as a product. [0003] The purification device of dicyclopentadiene in the related art mainly includes a vacuum rectification tower and a condensation reflux unit. The vacuum rectification towe...

AI Technical Summary

Problems solved by technology

[0004] However, the dicyclopentadiene in the material to be purified is easy to form an azeotrope with the heavy component in the remaining components, and the azeotrope will be output from the first outlet together with the dicyclopentadiene. Therefore, as the first product output 1. The purified material includes not only dicyclopentadiene, but also the azeotrope of dicyclopentadiene and heavy components, resulting in low yield of dicyclopentadiene and poor quality of output products

Images