Technology and Catalyst for Producing Ethylbenzene From Dilute Ethylene

Dilute ethylene comes from the tail gas of refinery andchemical plant, because of the high investment and highcost of refining and separating into pure ethylene, mostenterprises use it as low-grade fuel gas, resulting inserious waste of resources. The added value of ethylene can is greatly increased and the efficient utilization of petroleum resources can be realized by the catalytic reaction to convert ethylene into high-value chemicals directly.

The Shanghai institute has broken through the technical bottlenecks of high-performance impurity-resistant catalytic materials and reaction processes, with high efficiency. energy saving and low consumption pretreatment and separation, and large-scale equipment, successfully developed the SEB series of dilute ethylene to ethylbenzenecatalyst and developed the internationally leading complete set of technology of high-efficiency conversion of dilute ethylene to ethylbenzene (SGEB).

The technology has won one second prize of NationalTechnological invention and one second prize of national scientific and technological progress. China Patent Gold Award 1, China Patent Silver Award 1, China Patent Excellence Award 2: Sinopec has 1 second prize for technological invention and 3 first prizes for scientific andtechnological progress.

SGEB dilute ethylene to ethylbenzene technology using benzene and dilute ethylene as raw materials, through the gas phase alkylation method to synthesize ethylbenzene, its technical characteristics are as follows:

◆ Energy saving and consumption reduction: Innovative selective pretreatment and efficient reaction separation process, greatly improve resource utilization, integrated innovation of energy-saving and large-scale technology;

◆ Good process flexibility: can adapt to a variety of dilute ethylene raw materials (FCC, DCC, MTP device tail gas or crude ethane cracking gas, etc.), increase production of high-end products;

◆ High product quality: low xylene content in ethylbenzene products, high purity of ethylbenzene;

◆ High operating flexibility: the catalyst has a wide range of raw material concentration adaptability and resistance to process volatility.

At present, the brand of dilute ethylene to ethylbenzene catalyst is SEB series catalyst, the main product features are as follows:

11 sets of complete technology for efficient conversion of ethylene to ethylbenzene have been licensed. Following the completion of 300,000 tons/year ethylene to ethylbenzene plant in CNOOC Ningbo Daxie Petrochemical 2016, a larger 400,000 tons/year ethylene to ethylbenzene plant will be built successively in Sinopec Maoming Petrochemical and Anging Petrochemical in 2022. SEB series dilute ethylene to ethylbenzene catalyst has been widely used in 15 sets of equipment such as CNOOC China Chemical and private enterprises. Petro China

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