Prepn of sulfurless benzene with pyrolytic light benzol

Abstract

The present invention relates to the preparation process of benzene from pyrolytic light benzol. The present invention adopts combined extracting rectification and zeolite molecular sieve adsorption process. Compared with traditional acid pickling process and catalytic hydrorefining process, the process of the present invention has simple technological process, less corrosion to equipment, low cost and high yield and can obtain expensive thiophen product. The present invention is one better process for iron and steel enterprise and coking enterprise to deep processing and utilize side product.

Description

technical field

[0001] The present invention relates to the deep processing and utilization of the by-products produced in the industrial production process of iron and steel enterprises and coking enterprises, in particular, it relates to a method for preparing sulfur-free benzene by using coking light benzene as raw material through extractive distillation and molecular sieve selective adsorption . Background technique

[0002] Coking light benzene is a by-product of iron and steel enterprises and coking enterprises, and it is also a valuable resource for the development of organic and fine chemicals. However, due to its complex composition and high sulfur content, its comprehensive development and utilization are largely restricted, especially in the field of catalysis. For a long time, the deep processing and utilization of this coking by-product has not been greatly developed. my country's coking light benzene accounts for 40-50% of the benzene output. It is an importa...