China Petroleum Chemical Corporation

Shanghai Research Institute of Petrochemical Technology, Sinopec

Zhiyan Zhu

Juntao Liu

Lei Li

Wanmin Wang

Jun Kuai

Siqin Li

Junhua Zhu

The present invention discloses a process for the selective hydrogenation of phenylacetylene in the presence of styrene conducted in a combined bed, which process comprises under hydrogenation reaction conditions, passing a hydrocarbon fraction feedstock containing phenylacetylene and styrene through a combined bed reactor containing a catalyst A and a catalyst B to contact the feedstock with the catalyst A and the catalyst B in turn, wherein the catalyst A is a nickel-based catalyst, the catalyst B is at least one selected from the group consisting of palladium-based catalysts and copper-based catalysts, and a weight ratio of the catalyst A loaded to the catalyst B loaded is from 0.5:1 to 5:1.

Method for selective hydrogenation of phenylacetylene using composite bed in the presence of styrene

Provided are processes for producing an oxalate by coupling of CO in the presence of a nitrite, wherein two or more reaction zones in series are used, and at least a portion of the oxalate as reaction product is separated between the reaction zones, and/or the nitrite is fed stagewise. The processes described herein can effectively enhance the selectivity to the oxalate and the single-pass conversion of the feedstock.

Processes for producing an oxalate by coupling of CO

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Shanghai, China

Zhiyan Zhu