EP 0204750 A4 19871202 - REJUVENATION OF A DEACTIVATED CATALYST.

Title (en)

REJUVENATION OF A DEACTIVATED CATALYST.

Title (de)

REAKTIVIERUNG EINES ENTAKTIVIERTEN KATALYSATORS.

Title (fr)

REACTIVATION D'UN CATALYSEUR DESACTIVE.

Publication

EP 0204750 A4 19871202 (EN)

Application

EP 85905984 A 19851107

Priority

US 66948484 A 19841108
US 66948684 A 19841108
US 66948784 A 19841108

Abstract (en)

[origin: WO8602861A1] In one embodiment, a sulfur-contaminated catalyst is rejuvenated by the cyclic process of (1) exposing the catalyst to oxidizing conditions in the presence of oxygen at a temperature of from 200?oC to 450?oC; (2) contacting the oxidized catalyst with at least 10 cc of an aqueous media in the liquid phase per cc of catalyst; wherein the aqueous media is selected from the group consisting of water, an aqueous solution, and a saturated water vapor; and (3) exposing said wet catalyst to reducing conditions in the presence of hydrogen at a temperature of from 200?oC to 700?oC. In another embodiment, the catalyst is contacted with an aqueous solution of a salt of a metal selected from the group consisting of an alkali metal and an alkaline earth metal. In still another embodiment, the catalyst is washed with either a neutral solution or an acidic solution, contacted with an aqueous solution of a salt of a metal selected from the group consisting of an alkali metal and an alkaline earth metal, washed with a neutral solution, and dried.

IPC 1-7

B01J 29/38; B01J 38/06; B01J 38/10; B01J 38/48; B01J 38/60; B01J 38/64

IPC 8 full level

B01J 29/90 (2006.01)

CPC (source: EP KR)

B01J 21/20 (2013.01 - KR); B01J 29/90 (2013.01 - EP)

Citation (search report)

[A] BE 764917 A 19710927 - MOBIL OIL CORP
[A] US 3625865 A 19711207 - KITTRELL JAMES R, et al
[A] US 4139433 A 19790213 - WARD JOHN W
[A] US 4107031 A 19780815 - WARD JOHN W
[A] US 3849293 A 19741119 - WARD J
[A] GB 1377841 A 19741218 - EXXON RESEARCH ENGINEERING CO
[A] US 3943051 A 19760309 - WARD JOHN W
[A] US 3692692 A 19720919 - WARD JOHN W, et al
See references of WO 8602861A1

Designated contracting state (EPC)

DOCDB simple family (publication)

WO 8602861 A1 19860522; AU 5201686 A 19860603; CA 1257245 A 19890711; DE 3590575 T1 19861120; EP 0204750 A1 19861217; EP 0204750 A4 19871202; GB 2176716 A 19870107; GB 8612723 D0 19860702; KR 870700404 A 19871229; NL 8520394 A 19861001

DOCDB simple family (application)

US 8502218 W 19851107; AU 5201686 A 19851107; CA 494758 A 19851107; DE 3590575 T 19851107; EP 85905984 A 19851107; GB 8612723 A 19851107; KR 860700348 A 19860611; NL 8520394 A 19851107