-
公开(公告)号：US20170129969A1
公开(公告)日：2017-05-11
申请号：US15258226
申请日：2016-09-07
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： David J. Sandell
CPC classification number: C08F6/28 , B01J8/0015 , B01J8/003 , B01J8/24 , B01J2208/00663 , B01J2208/00761 , B01J2208/00769 , B01J2208/00973 , C08F2/01 , C08F6/005 , C08F210/02 , C08F210/16 , C08F210/14 , C08L23/0815 , C08F2/34
Abstract: Disclosed herein are methods and systems for purging a polymer product of volatiles. The methods and systems are particularly useful in the purging of a polyethylene polymer product produced in a fluidized bed reactor.
-
公开(公告)号：US11117980B2
公开(公告)日：2021-09-14
申请号：US16757331
申请日：2018-10-15
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Ryan W. Impelman , Richard J. Stolz , Marc L. DeChellis , David J. Sandell , Gerardo Corona
Abstract: In a gas phase fluidized bed polymerization process for the production of polyolefin polymers, such as polyethylene polymers or polypropylene polymers, loss of ethylene or propylene accompanying inert gas purging is reduced by passing an ethylene- or propylene-containing purge stream through a vent column to contact a hydrocarbon liquid flowing through the vent column contercurrent to the purge stream whereby unreacted ethylene or propylene in the purge stream portion is dissolved in the hydrocarbon liquid to produce an ethylene- or propylene-enriched liquid stream and an ethylene- or propylene-depleted gaseous stream. The ethylene- or propylene-enriched liquid stream is then recycled to the fluidized bed reactor, while at least part of the ethylene- or propylene-depleted gaseous stream is purged.
-
公开(公告)号：US10035864B2
公开(公告)日：2018-07-31
申请号：US15258226
申请日：2016-09-07
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： David J. Sandell
CPC classification number: C08F6/28 , B01J8/0015 , B01J8/003 , B01J8/24 , B01J2208/00663 , B01J2208/00761 , B01J2208/00769 , B01J2208/00973 , C08F2/01 , C08F6/005 , C08F210/02 , C08F210/16 , C08F210/14 , C08L23/0815 , C08F2/34
Abstract: Disclosed herein are methods and systems for purging a polymer product of volatiles. The methods and systems are particularly useful in the purging of a polyethylene polymer product produced in a fluidized bed reactor.
-
公开(公告)号：US11155652B2
公开(公告)日：2021-10-26
申请号：US17084294
申请日：2020-10-29
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Jason R. Fischer , David J. Sandell , Giyarpuram N. Prasad
Abstract: In a process for producing an olefin polymer, an olefin monomer is polymerized to produce a particulate polymer product containing unreacted monomer. The polymer product is contacted with an inert gas to strip hydrocarbon impurities therefrom and produce a stripped polymer product and a gaseous first effluent stream containing inert gas and hydrocarbons. The stripped polymer product is recovered and the first effluent stream is compressed and cooled to condense hydrocarbons contained therein and produce a gaseous second effluent stream. Part of the second effluent stream is contacted with a first membrane separator to produce a first hydrocarbon-enriched permeate stream and a first hydrocarbon-depleted residue stream. The first residue stream is contacted with a second membrane separator to produce a second hydrocarbon-enriched permeate stream and a second hydrocarbon-depleted residue stream. The second permeate stream and an oxidizing agent are supplied to a flameless thermal oxidation unit.
-
公开(公告)号：US20210139618A1
公开(公告)日：2021-05-13
申请号：US17084294
申请日：2020-10-29
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Jason R. Fischer , David J. Sandell , Giyarpuram N. Prasad
Abstract: In a process for producing an olefin polymer, an olefin monomer is polymerized to produce a particulate polymer product containing unreacted monomer. The polymer product is contacted with an inert gas to strip hydrocarbon impurities therefrom and produce a stripped polymer product and a gaseous first effluent stream containing inert gas and hydrocarbons. The stripped polymer product is recovered and the first effluent stream is compressed and cooled to condense hydrocarbons contained therein and produce a gaseous second effluent stream. Part of the second effluent stream is contacted with a first membrane separator to produce a first hydrocarbon-enriched permeate stream and a first hydrocarbon-depleted residue stream. The first residue stream is contacted with a second membrane separator to produce a second hydrocarbon-enriched permeate stream and a second hydrocarbon-depleted residue stream. The second permeate stream and an oxidizing agent are supplied to a flameless thermal oxidation unit.
-
Patent Agency Ranking
公开(公告)号：US20200172638A1
公开(公告)日：2020-06-04
申请号：US16632770
申请日：2018-04-11
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Michael G. Tribo , David J. Sandell
IPC: C08F6/00
Abstract: A method for the removal of unreacted olefin monomer(s) from polyolefin product particles of an olefin polymerization reaction, the method including: contacting the polyolefin product particles with a countercurrent flow of a purge gas in a purge vessel under conditions allowing diffusion of unreacted monomer and other gaseous substances from the polyolefin product particles into the countercurrent flow of the purge gas to produce purged particles; wherein the velocity of the purge gas exceeds 50% of the calculated minimum fluidization velocity of the polyolefin product particles in the purge vessel (Umf), is provided.
-
公开(公告)号：US20180118861A1
公开(公告)日：2018-05-03
申请号：US15566028
申请日：2016-05-06
Applicant: ExxonMobil Chemical Patents INC.
Inventor： David J. Sandell , Marc L. De Chellis , Fred D. Ehrman
CPC classification number: C08F210/16 , C08F2/34 , C08F4/24 , C08F4/52 , C08F2500/12 , C08K5/01 , C08L23/0815 , C08L2314/02 , C08L2314/06 , C08L2314/08 , C08F210/14 , C08F2/002
Abstract: A process including contacting one or more monomers, at least one catalyst system, and a condensing agent including a majority of 2,2-dimethylpropane under polymerizable conditions to produce a polyolefin polymer is provided.
-
公开(公告)号：US11492422B2
公开(公告)日：2022-11-08
申请号：US16952991
申请日：2020-11-19
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Michael D. Lucas , Handel D. Bennett , David T. Lakin , Aaron C. McGinnis , Benjamin J. Ohran , David J. Sandell
IPC: C08F2/34 , C08F2/01 , C08F210/16 , C08F210/06 , C08F210/02
Abstract: A process for producing an olefin polymer employs a gas phase polymerization reactor having a product discharge system comprising first and second pairs of lock hoppers, wherein each pair comprises an upstream lock hopper connected by valve means to the reactor and a downstream lock hopper connected by valve means to the upstream lock hopper and by further valve means to a product recovery system, and wherein a first cross-tie is provided between the upstream lock hoppers of the first and second pairs of lock hoppers and a second cross-tie is provided between the downstream lock hoppers of the first and second pairs of lock hoppers. Operation of the second cross-tie during product removal cycles is controlled in accordance with reactor pressure.
-
公开(公告)号：US11208506B2
公开(公告)日：2021-12-28
申请号：US16632770
申请日：2018-04-11
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Michael G. Tribo , David J. Sandell
IPC: C08F6/00
Abstract: A method for the removal of unreacted olefin monomer(s) from polyolefin product particles of an olefin polymerization reaction, the method including: contacting the polyolefin product particles with a countercurrent flow of a purge gas in a purge vessel under conditions allowing diffusion of unreacted monomer and other gaseous substances from the polyolefin product particles into the countercurrent flow of the purge gas to produce purged particles; wherein the velocity of the purge gas exceeds 50% of the calculated minimum fluidization velocity of the polyolefin product particles in the purge vessel (Umf), is provided.
-
公开(公告)号：US20210079126A1
公开(公告)日：2021-03-18
申请号：US16952991
申请日：2020-11-19
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Michael D. Lucas , Handel D. Bennett , David T. Lakin , Aaron C. McGinnis , Benjamin J. Ohran , David J. Sandell
IPC: C08F2/34 , C08F2/01 , C08F210/02 , C08F210/06 , C08F210/16
Abstract: A process for producing an olefin polymer employs a gas phase polymerization reactor having a product discharge system comprising first and second pairs of lock hoppers, wherein each pair comprises an upstream lock hopper connected by valve means to the reactor and a downstream lock hopper connected by valve means to the upstream lock hopper and by further valve means to a product recovery system, and wherein a first cross-tie is provided between the upstream lock hoppers of the first and second pairs of lock hoppers and a second cross-tie is provided between the downstream lock hoppers of the first and second pairs of lock hoppers. Operation of the second cross-tie during product removal cycles is controlled in accordance with reactor pressure.
-
-
-
-
-
-
-
-
-
Search Results
11
records
(took 0.013 seconds)
