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:
Aug. 16, 2016
Filed:
Mar. 01, 2011
Yuying Shu, Ellicott City, MD (US);
Richard F. Wormsbecher, Dayton, MD (US);
Wu-cheng Cheng, Ellicott City, MD (US);
Michael D Wallace, Glenelg, MD (US);
Yuying Shu, Ellicott City, MD (US);
Richard F. Wormsbecher, Dayton, MD (US);
Wu-Cheng Cheng, Ellicott City, MD (US);
Michael D Wallace, Glenelg, MD (US);
W. R. Grace & Co.-Conn., Columbia, MD (US);
Abstract
This invention relates to a process of preparing an improved catalyst comprising a clay derived zeolite. In particular, the invention comprises combining an yttrium compound with a zeolite produced by treating clay with a silica source and under alkaline conditions. The clay derived zeolite can be further combined with conventional matrix and/or binder precursors to form particulates suitable for use as catalysts in fluid catalytic cracking (FCC). Alternatively, the clay that is treated with the silica source and alkaline conditions can be in particulate form having sizes suitable for use in FCC, and the zeolite is produced in situ within the particulate. Yttrium compound is then combined with the zeolite in the particulate, e.g., via impregnation. It has been shown that the addition of the yttrium compound improves zeolite surface area retention, and zeolite stability in catalysts comprising clay derived zeolites.