公开(公告)号：US20140260417A1

公开(公告)日：2014-09-18

申请号：US14200395

申请日：2014-03-07

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Karl Lee HERZOG ,  Qi MA ,  Will T. JAMES ,  Attilio J. PRADERIO ,  Jackie CHAN ,  Wesley Roy QUALLS

IPC: F25J1/00

CPC classification number: F25J1/0022 ,  C10L3/101 ,  F25J1/004 ,  F25J1/0052 ,  F25J1/0085 ,  F25J1/0087 ,  F25J1/021 ,  F25J1/0231 ,  F25J1/0237 ,  F25J1/0238 ,  F25J3/0209 ,  F25J3/0233 ,  F25J3/0247 ,  F25J2200/02 ,  F25J2200/78 ,  F25J2205/50 ,  F25J2215/02 ,  F25J2235/60 ,  F25J2245/02 ,  F25J2260/02 ,  F25J2280/02 ,  F25J2280/50

Abstract: Systems and methods for removing heavy hydrocarbons are provided. Methods for liquefying a natural gas stream include: (a) cooling at least a portion of the natural gas stream in an upstream refrigeration cycle of a liquefaction process to produce a cooled natural gas stream; (b) separating via a first distillation column the cooled natural gas stream into a first top fraction and a first bottom fraction, wherein the first fraction does not freeze in a subsequent downstream step of the liquefaction process; (c) separating via a second distillation column the first bottom fraction into a second top fraction and a second bottom fraction, wherein the second top fraction at least a portion of a reflux stream; (d) optionally separating via a third distillation column the second bottom fraction into a third top fraction and a third bottom fraction, wherein the third top fraction forms a portion of the reflux stream; and (e) introducing the reflux stream into the first distillation column.

Abstract translation: 提供了用于除去重质烃的系统和方法。 用于液化天然气流的方法包括：（a）在液化过程的上游制冷循环中冷却至少一部分天然气流以产生冷却的天然气流; （b）通过第一蒸馏塔将冷却的天然气流分离成第一顶部馏分和第一塔底馏分，其中第一馏分在随后的液化过程的下游步骤中不冷冻; （c）通过第二蒸馏塔将第一塔底馏分分离成第二顶部馏分和第二塔底馏分，其中第二顶馏分至少部分回流物流; （d）任选地通过第三蒸馏塔将第二底部馏分分离成第三顶部馏分和第三塔底馏分，其中第三顶馏分形成回流物流的一部分; 和（e）将回流物流引入第一蒸馏塔。

公开(公告)号：US20220364005A1

公开(公告)日：2022-11-17

申请号：US17815178

申请日：2022-07-26

Applicant: ConocoPhillips Company

Inventor： Attilio J. PRADERIO ,  Qi MA ,  Wesley R. QUALLS ,  Will T. JAMES ,  Michael J. CALDERON ,  Paul R. DAVIES

IPC: C10L3/10

Abstract: The invention relates to a system, method and apparatus for processing natural gas in an LNG facility. A natural gas feed is introduced into a heavies removal unit. The heavies removal system includes a heavies removal column and a distillation column. The heavies removal column and the distillation column are connected via a purge/recovery line. One or more components of the natural gas feed is purged from the heavies removal column to the distillation column via the purge/recovery line to obtain a specified concentration or concentration range of heavy components feeding into the distillation column.