Patent SG-11201807624R-A (SG)
Title: Claus unit treatment of shutdown tail gas
Inventor: DEBROCK MATT
IPC: C01B17/04
Filed: 2017-03-06
Abstract: WO 17 / 165 106 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2017/165106 Al 28 September 2017 (28.09.2017) WIPO I PCT (51) International Patent Classification: C01B 17/04 (2006.01) BOlD 53/86 (2006.01) BOlD 53/52 (2006.01) BOlD 53/96 (2006.01) (21) International Application Number: PCT/US2017/020889 (22) International Filing Date: 6 March 2017 (06.03.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/312,166 23 March 2016 (23.03.2016) US (71) Applicant: EXXONMOBIL RESEARCH AND ENGIN- EERING COMPANY [US/US]; 1545 Route 22 East, P.O.Box 900, Annandale, NJ 08801-0900 (US). (72) Inventors: DEBROCK, Matt, E.; 2267 Austin St., Hous- ton, TX 77002 (US). GISLAIN, Jon, F.; 24125 Walnut Circle, Plainfield, IL 60585 (US). RICHARD, Megan, M.; 959 Chamboard Lane, Houston, TX 77018 (US). CORLEY, John, D.; 28254 Kinnikinick Road, Evergreen, CO 80439 (US). COLWELL, James, F.; 2207 South Tumberry Ave, Zachary, LA 70791 (US). (74) Agents: WARD, Andere, T. et al.; Exxonmobil Research And Engineering Company, 1545 Route 22 East, P.O.Box 900, Annandale, NJ 08801-0900 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: as to applicant's entitlement to apply for and be granted a patent (Rule 4.1700) as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17(iii)) Published: with international search report (Art. 21(3)) (54) Title: CLAUS UNIT TREATMENT OF SHUTDOWN TAIL GAS FIG 2 (57) : The process for configuring or reconfiguring a sulfur removal plant having a plurality of Claus units that is greater than the number of downstream tail gas treating units (TGTUs) is disclosed. The process allows for the regeneration of one of the Claus units without shutting down any of the downstream TGTUs or the other Claus units. Specifically, the regeneration tail gas can be diverted to the reaction furnace of an in-service Claus unit, thereby allowing excess oxygen to be used to regenerate the Claus unit more efficiently, and without exceeding environmental SO emission requirements. 2 11111111111111011101010111110101111101110111111111111101011011111111111111110111111