Robert J Strack

7138047, Nov 21, 2006

Jul 3, 2002

10/188461

Richard C. Stell - Houston TX, US
Arthur R. DiNicolantonio - Seabrook TX, US
James Mitchell Frye - Pebble Bay, SG
David B. Spicer - Houston TX, US
James N. McCoy - Houston TX, US
Robert David Strack - Houston TX, US

ExxonMobil Chemical Patents Inc. - Houston TX

C10G 9/36

208130, 208125, 208128, 208132, 208652, 208 48 R

A process for feeding or cracking heavy hydrocarbon feedstock containing non-volatile hydrocarbons comprising: heating the heavy hydrocarbon feedstock, mixing the heavy hydrocarbon feedstock with a fluid and/or a primary dilution steam stream to form a mixture, flashing the mixture to form a vapor phase and a liquid phase, and varying the amount of the fluid and/or the primary dilution steam stream mixed with the heavy hydrocarbon feedstock in accordance with at least one selected operating parameter of the process, such as the temperature of the flash stream before entering the flash drum.

7312371, Dec 25, 2007

May 21, 2004

10/851730

Richard C. Stell - Houston TX, US
Robert D. Strack - Houston TX, US
James M. Frye - Houston TX, US
Alok Srivastava - Houston TX, US
Subramanian Annamalai - Singapore, SG
James N. McCoy - Houston TX, US

ExxonMobil Chemical Patents Inc. - Houston TX

C10G 9/14
C07C 4/04

585652, 585648, 585650, 208132

A process for cracking a heavy hydrocarbon feedstock containing non-volatile components and/or coke precursors, wherein a stripping agent is added to the feedstock to form an enhanced hydrocarbon blend which is thereafter separated into a vapor phase and a liquid phase by flashing in a flash/separation vessel, separating and cracking the vapor phase, and recovering cracked product. The stripping agent increases vaporization of the volatile fraction of the heavy hydrocarbon increasing the maximum feedrate capacity of the furnace.

7465388, Dec 16, 2008

Jul 8, 2005

11/178158

Robert David Strack - Houston TX, US
John R. Messinger - Kingwood TX, US

ExxonMobil Chemical Patents Inc. - Houston TX

C10G 9/36

208130, 585648, 585650, 585652

A method is disclosed for treating the effluent from a hydrocarbon pyrolysis process unit to recover heat and remove tar therefrom. The method comprises passing the gaseous effluent to at least one primary heat exchanger, thereby cooling the gaseous effluent and generating high pressure steam. Thereafter, the gaseous effluent is passed through at least one secondary heat exchanger having a heat exchange surface maintained at a temperature such that part of the gaseous effluent condenses to form in situ a liquid coating on said surface, thereby further cooling the remainder of the gaseous effluent to a temperature at which tar, formed by the pyrolysis process, condenses. The condensed tar is then removed from the gaseous effluent in at least one knock-out drum.

7560019, Jul 14, 2009

Dec 5, 2006

11/633823

James N. McCoy - Houston TX, US
Walter F. Filupeit - Houston TX, US
Barrington M. Hammond - Houston TX, US
David J. Duhon - Kingwood TX, US
Mark A. Rooney - Humble TX, US
Robert A. Strack - Houston TX, US
John R. Messinger - Kingwood TX, US

ExxonMobil Chemical Patents Inc. - Houston TX

C10G 55/04
B01J 8/04

208 69, 208106, 208125, 208130, 422189

In a system for thermal cracking gaseous feedstocks, the system including a gas cracker for producing an effluent comprising olefins, at least one transfer line exchanger for the recovery of process energy from the effluent and a water quench tower system, a process for extending the range of system feedstocks to include liquid feedstocks that yield tar is provided. The process includes the steps of injecting a first quench fluid downstream of the at least one transfer line exchanger to quench the process effluent comprising olefins, separating in a separation vessel a cracked product and a first byproduct stream comprising tar from the quenched effluent, directing the separated cracked product to the water quench tower system and quenching the separated cracked product with a second quench fluid to produce a cracked gas effluent for recovery and a second byproduct stream comprising tar. An apparatus for cracking a liquid hydrocarbon feedstock that yield tar is also provided.

7578929, Aug 25, 2009

Jul 17, 2006

11/487780

Richard C. Stell - Houston TX, US
Arthur R. Dinicolantonio - Seabrook TX, US
James Mitchell Frye - Pebble Bay, SG
David B. Spicer - Houston TX, US
James N. McCoy - Houston TX, US
Robert David Strack - Houston TX, US

Exxonmoil Chemical Patents Inc. - Houston TX

C10G 9/36

208130, 208 48 R, 208106, 208125, 208128, 208132, 208652, 585648, 585649, 585650, 585652

A process for feeding or cracking heavy hydrocarbon feedstock containing non-volatile hydrocarbons comprising: heating the heavy hydrocarbon feedstock, mixing the heavy hydrocarbon feedstock with a fluid and/or a primary dilution steam stream to form a mixture, flashing the mixture to form a vapor phase and a liquid phase, and varying the amount of the fluid and/or the primary dilution steam stream mixed with the heavy hydrocarbon feedstock in accordance with at least one selected operating parameter of the process, such as the temperature of the flash stream before entering the flash drum.

7582201, Sep 1, 2009

Dec 5, 2006

11/633975

James N. McCoy - Houston TX, US
Barrington M. Hammond - Houston TX, US
David J. Duhon - Kingwood TX, US
Mark A. Rooney - Humble TX, US
Robert D. Strack - Houston TX, US
John R. Messinger - Kingwood TX, US

ExxonMobil Chemical Patents Inc. - Houston TX

C10C 1/19
C10G 55/02
F28D 21/00

208 44, 208 69, 208106, 208125, 208130, 422189, 422207

In a system for thermal cracking gaseous feedstocks, the system including a gas cracker for producing an effluent comprising olefins, at least one transfer line exchanger for the recovery of process energy from the effluent and a water quench tower system, a process for extending the range of system feedstocks to include liquid feedstocks that yield tar is provided. The process includes the steps of injecting a first quench fluid downstream of a primary transfer line exchanger to quench the process effluent comprising olefins, separating in a first separation vessel a cracked product and a first byproduct stream comprising tar from the quenched effluent, directing the separated cracked product to a water quench tower system and quenching the separated cracked product with a second quench fluid to produce a cracked gas effluent for recovery and a second byproduct stream comprising tar. An apparatus for carrying out such process is also provided.

7674366, Mar 9, 2010

Jul 8, 2005

11/177125

Robert David Strack - Houston TX, US
John R. Messinger - Kingwood TX, US

ExxonMobil Chemical Patents Inc. - Houston TX

C10G 9/16
C10G 9/18
B01J 10/00

208 48Q, 208102, 208103, 208106, 422129

A method is disclosed for treating the effluent from a hydrocarbon pyrolysis unit without employing a primary fractionator. The method comprises cooling the gaseous effluent, e. g. , by direct quench and/or at least one primary heat exchanger, thereby generating high pressure steam, and then cooling the gaseous effluent to a temperature at which tar, formed by reactions among constituents of the effluent, condenses. The resulting mixed gaseous and liquid effluent is passed through a quench oil knock-out drum, to separate quench oil from the gaseous effluent which is then cooled to condense a liquid effluent comprising pyrolysis gasoline and water condensed from steam, which fractions are separated in a distillate drum. The cooled gaseous effluent is directed to a recovery train, to recover light olefins. The pyrolysis gasoline-containing fraction passes to a tailing tower which provides an overhead stream rich in pyrolysis gasoline and a bottoms stream rich in gas oil.

7718049, May 18, 2010

Jul 8, 2005

11/177076

Robert David Strack - Houston TX, US
Richard C. Stell - Houston TX, US
John R. Messinger - Kingwood TX, US
Dane C. Grenoble - Houston TX, US
John E. Asplin - Singapore, SG

Exxonmobil Chemical Patents Inc. - Houston TX

C10G 9/16
C10G 9/18
B01J 10/00

208 48Q, 208100, 208106, 422129

A method is disclosed for treating gaseous effluent from a hydrocarbon pyrolysis unit to provide steam cracked tar of reduced asphaltene and toluene insolubles content. The method is suitable for preparing reduced viscosity tar useful as a fuel blending stock, or feedstock for producing carbon black, while reducing or eliminating the need for externally sourced lighter aromatics additives to meet viscosity specifications. The method comprises drawing steam cracked tar from a separation vessel, e. g. , a primary fractionator or tar knock-out drum, cooling the tar, and returning it to the separation vessel to effect lower overall tar temperatures within the separation vessel, in order to reduce viscosity increasing condensation reactions. An apparatus for carrying out the method is also provided.