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:
Apr. 22, 2014
Filed:
Oct. 18, 2011
Alexander E. Kuperman, Orinda, CA (US);
Theodorus Maesen, Moraga, CA (US);
Dennis Dykstra, Pinole, CA (US);
Ping Wang, Richmond, CA (US);
Soy Uckung, Richmond, CA (US);
Alexander E. Kuperman, Orinda, CA (US);
Theodorus Maesen, Moraga, CA (US);
Dennis Dykstra, Pinole, CA (US);
Ping Wang, Richmond, CA (US);
Soy Uckung, Richmond, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
In a process for forming a bulk hydroprocessing catalyst by sulfiding a catalyst precursor made in a co-precipitation reaction, up to 60% of the metal precursor feeds end up in the supernatant. The metals can be recovered via any of chemical precipitation, ion exchange, electro-coagulation, and combinations thereof to generate an effluent stream containing less than 50 mole % of metal ions in at least one of the metal residuals, and for at least one of the metal residuals recovered as a metal precursor feed for use in the co-precipitation reaction. In one embodiment, the resin functions as an anion exchange resin with an acidic supernatant to recover Group VIB metal residuals, and a cation exchange resin with a basic supernatant to recover Promoter metal residuals. An effluent stream from the process to waste treatment contains less than 50 ppm metals.