Patent SG-11201906790R-A (SG)
Title: Pre-cooling of natural gas by high pressure compression and expansion
Inventor: PIERRE FRITZ
IPC: F25J1/00
Filed: 2018-01-15
Abstract: 1 N N 1-1 00 1-1 O N C (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 16 August 2018 (16.08.2018) WIP0 1 PCT omit °nolo olo Ho mom!! °nom mil (10) International Publication Number WO 2018/147973 Al (51) International Patent Classification: F25J 1/00 (2006.01) F25J 1/02 (2006.01) (21) International Application Number: PCT/US2018/013701 (22) International Filing Date: 15 January 2018 (15.01.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/458,127 13 February 2017 (13.02.2017) US (71) Applicant (for all designated States except US): EXXONMOBIL UPSTREAM RESEARCH COMPA- NY [US/US]; (EMHC-E2-4A-296), 22777 Springwoods Village Parkway, Spring, TX 77389 (US). (72) Inventor; and (71) Applicant US only): PIERRE, Fritz, Jr. [US/US]; 18011 Bayou Mead Trail, Humble, TX 77346 (US). (74) Agent: JENSEN, Nathan, 0. et al.; Exxonmobil Upstream Research Company, (emhc-e2-4a-296), 22777 Spring- woods Village Parkway, Spring, TX 77389 (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, JO, 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, (54) Title: PRE-COOLING OF NATURAL GAS BY HIGH PRESSURE COMPRESSION AND EXPANSION 800 --„ 1 / 4 802 812 820 FIG. 8 (57) : A method of producing liquefied natural gas (LNG) is disclosed. A natural gas is compressed in at least two serially arranged compressors to a pressure of at least 2,000 psia and cooled to form a cooled compressed natural gas stream. The cooled compressed natural gas stream is additionally cooled to a temperature below an ambient temperature to form an additionally cooled compressed natural gas stream, which is expanded in at least one work producing natural gas expander to a pressure that is less than 3,000 psia and no greater than the pressure to which the at least two serially arranged compressors compress the natural gas stream, to thereby form a chilled natural gas stream. The chilled natural gas stream is liquefied by indirect heat exchange with a refrigerant to form liquefied natural gas and a warm refrigerant. The cooled compressed natural gas stream is additionally cooled using the warm refrigerant. [Continued on next page] WO 2018/147973 Al MIDEDIMOMOIDEIREEMOMMHOMMOHIIMOVOIMIE 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 4.17(H)) 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)) before the expiration of the time limit for amending the claims and to be republished in the event of receipt of amendments (Rule 48.2(h))