Production process of propylene
AssigneeMitsubishi Chemical Corporation
InventorsMikio Hayashi, Masashi Yamaguchi, Yumiko Yoshikawa, Takahiko Takewaki, Tohru Setoyama
Life of this patent
Estimating the term…
Abstract
An object of the present invention is to provide a process of producing propylene by contacting ethylene with a catalyst, where propylene is produced with high selectivity. The present invention relates to a production process of propylene, comprising contacting ethylene with a catalyst, wherein the catalyst comprises a zeolite as an active ingredient and an acid content in the outer surface of the zeolite is 5 % or less based on an acid content of the entire zeolite.
Claims9
A process of producing propylene comprising contacting ethylene with a catalyst to form propylene, wherein:
- the catalyst comprises a zeolite as an active ingredient;
- an acid content in the outer surface of the zeolite is 5% or less based on an acid content of the entire zeolite;
- the acid content in the outer surface is measured by allowing a substance, capable of selectively adsorbing on acid sites of the zeolite and incapable of intruding into the inside of a micropore of the zeolite, to adsorb on the zeolite, and quantitatively determining the adsorption amount;
- the acid content of the entire zeolite is measured by allowing a substance, capable of selectively adsorbing on acid sites of the zeolite and intruding also into the inside of the micropore, to adsorb on the zeolite, and quantitatively determining the adsorption amount;
- and said zeolite has a pore size of less than 0.5 nm.
Dependencies are inferred from the claim text.