The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2018
Filed:
Apr. 11, 2017
Dow Technology Investments Llc, Midland, MI (US);
Hirokazu Shibata, Bergen op Zoom, NL;
Arun Basrur, Pune, IN;
Srikant Gopal, Yerwada Pune, IN;
Mark McAdon, Midland, MI (US);
Albert Cheng-Yu Liu, Charleston, WV (US);
Liping Zhang, Lake Jackson, TX (US);
Ernest R. Frank, Lake Jackson, TX (US);
Dow Technology Investments LLC, Midland, MI (US);
Abstract
Methods of preparing a second high-efficiency, rhenium-promoted silver catalyst for producing alkylene oxide from an alkylene based on a first catalyst are disclosed and described. In accordance with the disclosed methods, the first and second catalysts include at least one promoter that includes a rhenium promoter. The target catalyst concentrations of one or more promoters of the at least one promoter on the second catalyst are determined based on the values of a catalyst reference property for the two catalysts and the concentration of the one or more promoters of the at least one promoter on the first catalyst. Suitable catalyst reference properties include carrier specific surface area and silver specific surface area. Reaction systems utilizing the first and second catalysts are also described.