Liquid phase catalyst for ethylbenzene production

1、Overview

The liquid-phase alkylation of ethylbenzene catalyzed by molecular sieve has the characteristics of low reaction temperature, few side reactions, low energy consumption, and high product purity. Further development of low benzene to olefin ratio liquid-phase alkylation technology approaching stoichiometry to reduce benzene circulation is the trend of low-carbon production of ethylbenzene. A series of energy-saving catalysts for the liquid-phase alkylation of ethylbenzene (EBC) with low benzene to olefin ratio were developed based on ultra-thin layered MWW molecular sieves.

The currently promoted brand of catalyst for liquid-phase alkylation of benzene and ethylene to produce ethylbenzene is the EBC series catalyst. The main features of the product are as follows:

Product EBC series alkylating catalyst EBC series alkyl transfer catalyst

Reaction process conditions

Reaction temperature (℃) 180-230 170-230

Reaction pressure (Mpa) 3.0-4.0 2.8-3.5

Ethylene weight airspeed (h-1) 0.6-1.5

Benzene/ethylene, （mol/mol） 1.6-3.0 

Performance guarantee value

Ethylene conversion rate (%) ≥ 100

Ethyl selectivity (%) ≥ 99.2

Product ethylbenzene purity (%) ≥ 99.9

Xylene content (ppm) ≤ 10

Regeneration cycle, year ≥ 4 ≥ 4

Catalyst lifespan, years ≥ 12 ≥ 12

Conversion rate of diethylbenzene,%  ≥60.0

Ethylbenzene selectivity,%  ≥99.0

2、Promotion application