October 31, 2011

CAS databases provide millions of journal article references from more than 10,000 major scientific journals worldwide, patent and patent family references from 61 patent authorities around the world, and other reputable web sources.

The following patent record is from the CAplusSM database.

CAPLUS COPYRIGHT 2011 ACS

Patent Number: US 8003840
Title: Bismuth molybdate-based catalysts, method of preparing thereof and method of preparing 1,3-butadiene using the catalysts
Inventor(s): Oh, Seung Hoon; Lee, Seong Jun; Kim, Tae Jin; Choi, Ahn Seop; Chung, Young Min; Song, In Kyu; Jung, Ji Chul; Kim, Hee Soo
Patent Assignee(s): SK Energy Co., Ltd., S. Korea
Source: PCT Int. Appl., 40 pp. CODEN: PIXXD2
Language: English

Abstract:
This invention relates to a bismuth molybdate catalyst, a preparation method thereof, and a method of preparing 1,3-butadiene using the same, in which 1,3-butadiene can be prepared through oxidative dehydrogenation directly using a C4 mixture including n-butene and n-butane as a reactant in the presence of a mixed-phase bismuth molybdate catalyst including alpha-bismuth molybdate (Bi2Mo3O12) and gamma-bismuth molybdate (Bi2MoO6). According to this invention, the C4 raffinate, containing many impurities, is used as a reactant, without an addnl. n-butane separation process, thus obtaining 1,3-butadiene at high yield. Unlike complicated multicomponent-based metal oxides, the catalyst of the invention has simple constituents and synthesis routes, and can be easily formed through phys. mixing, and thus is very advantageous in assuring reproducibility and can be directly applied to com. processes.

Please note:  Titles for patent records in CAplus are routinely enhanced to better describe the claimed invention. In this example, the title of the U.S. granted patent is Bismuth molybdate-based catalysts, method of preparing thereof and method of preparing 1,3-butadiene using thereof. For the CAplus record, this title was enhanced to read Bismuth molybdate-based catalysts, method of preparing thereof and method of preparing 1,3-butadiene using the catalysts. CAS originally indexed the KR priority publication (KR 2006-35051A ) as the first published record of the invention. The original Korean patent application was assigned to SK Energy Co., Ltd and subsequently reassigned to SK Innovation Co., LTD and SK Global Chemical Co., LTD for the granted U.S. Patent (US 8003840).

View the full-text U.S. patent from USPTO.

 

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