Delayed coking process for producing free-flowing coke using a substantially metals-free additive
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C10G-009/14
C10G-009/00
출원번호
US-0846033
(2004-05-14)
등록번호
US-7306713
(2007-12-11)
발명자
/ 주소
Siskin,Michael
Gorbaty,Martin L.
Eppig,Christopher P.
Ferrughelli,David T.
Kelemen,Simon R.
Brown,Leo D.
출원인 / 주소
ExxonMobil Research and Engineering Company
인용정보
피인용 횟수 :
3인용 특허 :
29
초록▼
A delayed coking process for making substantially free-flowing shot coke. A coker feedstock, such as a vacuum residuum, is treated with an additive, such as a elemental sulfur, high surface area substantially metals-free solids, process fines, a mineral acid anhydride and the like. The treated feeds
A delayed coking process for making substantially free-flowing shot coke. A coker feedstock, such as a vacuum residuum, is treated with an additive, such as a elemental sulfur, high surface area substantially metals-free solids, process fines, a mineral acid anhydride and the like. The treated feedstock is then heated to coking temperatures and passed to a coker drum for a time sufficient to allow volatiles to evolve and to produce a substantially free-flowing shot coke.
대표청구항▼
The invention claimed is: 1. A delayed coking process comprising: a) heating a petroleum resid, which is essentially a solid at room temperature, in a first heating zone, to a temperature below coking temperatures wherein it is converted to a pumpable liquid; b) conducting said heated resid to a se
The invention claimed is: 1. A delayed coking process comprising: a) heating a petroleum resid, which is essentially a solid at room temperature, in a first heating zone, to a temperature below coking temperatures wherein it is converted to a pumpable liquid; b) conducting said heated resid to a second heating zone wherein it is heated to an effective coking temperature; c) conducting said heated resid from said second heating zone to a coking zone operating at a temperature between about 410째 C. and 475째 C. wherein vapor products are collected overhead and coke is formed; d) introducing into said resid at least one substantially metals-free additive that is effective for the formation of substantially free-flowing shot coke, wherein said substantially metals additive is introduced into said resid at a point upstream of said second heating zone, upstream of said coking zone, or both; and e) removing a substantially free-flowing shot coke from the coking zone where said free-flowing shot coke comprises substantially discrete micro-domains having an average size ranging from about 0.5 to about 10 μm. 2. The process of claim 1 wherein the substantially metals-free additive is one or more of elemental sulfur, high surface area substantially metals-free solids, peroxides and salts of inorganic oxides, such as fumed silica, and mineral acids such as sulfuric acid and nitric acid. 3. The process of claim 2 wherein the substantially metals-free additive is elemental sulfur. 4. The process of claim 2 where the high surface area material is selected from the group consisting of elemental sulfur, high surface area substantially metals-free solids, such as rice hulls, sugars, cellulose, ground coals, and ground auto tires. 5. The process of claim 2 where the substantially metals-free additive is selected from the group consisting of sulfuric acid, sulfuric and/or nitric acid anhydrides, and mixtures thereof. 6. The process of claim 1 further comprising adding caustic to the resid feed. 7. The process of claim 1 further comprising conducting at least one volatile product away from the coking zone. 8. A delayed coking process comprising: a) contacting a vacuum resid with an effective amount of at least one metals-free additive at a temperature from about 70째 C. to about 270째 C. for a time sufficient to disperse the additive substantially uniformly into the feed, which additive is one that favors the formation of shot coke; b) heating the treated resid to a temperature effective for coking said feed; c) charging said heated and treated resid to a coking zone at a pressure from about 15 to 80 psig at a temperature between about 410째 C. and 475째 C. for a time sufficient to form a hot coke bed; d) quenching at least a portion of the hot coke bed with water; and e) removing a substantially free-flowing shot coke from the coking zone where said free-flowing shot coke comprises substantially discrete micro-domains having an average size ranging from about 0.5 to about 10 μm. 9. The process of claim 8 wherein the temperature of step a.) ranges from about 100째 C. to about 325째 C. 10. The process of claim 8 wherein the metals-free additive is added to the vacuum resid prior to the coking zone. 11. The process of claim 8 wherein an aqueous caustic is added to the resid prior to said coking zone. 12. The process of claim 8 wherein the coking zone is in a coker drum. 13. The process of claim 8 further comprising collecting volatile components overhead in the coking zone. 14. The process of claim 8 wherein the metals-free additive is one or more of elemental sulfur, high surface area substantially metals-free solids, peroxides and salts of inorganic oxides, such as fumed silica and mineral acids such as sulfuric acid, and nitric acid.
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이 특허에 인용된 특허 (29)
Wiehe Irwin A. ; Varadaraj Ramesh ; Jermansen Torris G. ; Kennedy Raymond J. ; Brons Cornelius H., Branched alkyl-aromatic sulfonic acid dispersants for solublizing asphaltenes in petroleum oils.
Heck Roland H. (Pennington NJ) Reischman Tom (Lambertville NJ) Teitman Gerald J. (Vienna VA) Viscontini Salvatore T. M. (Northampton PA), Delayed coking with refinery caustic.
Morshedi Abdol M. (Houston TX) Cutler Charles R. (Houston TX) Fitzpatrick Thomas J. (Katy TX) Skrovanek Thomas A. (Houston TX), Dynamic process control.
Howell Jerald A. (Bartlesville OK) Tabler Donald C. (Bartlesville OK) Haskell Donald M. (Bartlesville OK), Hydrovisbreaking process for hydrocarbon containing feed streams.
Antalffy Leslie Peter ; Benoit Robert ; Bryant Gerald ; Knowles Michael B. ; Malek David W. ; Martin Samuel Allen, Low headroom coke drum deheading device.
Hraban Thomas L. (Ponca City OK) Seyler Paul E. (Ponca City OK) Dixon Todd W. (Lake Charles LA), Process for upgrading the flash zone gas oil stream from a delayed coker.
Varadaraj, Ramesh; Siskin, Michael; Brown, Leo D.; Brons, Cornelius H., Method to alter coke morphology using metal salts of aromatic sulfonic acids and/or polysulfonic acids.
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