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Roger K Lott, Lap Keung Lee: Hydroprocessing method and system for upgrading heavy oil using a colloidal or molecular catalyst. Headwaters Heavy Oil, Workman Nydegger, August 25, 2009: US07578928 (17 worldwide citation)

Methods and systems for hydroprocessing heavy oil feedstocks to form an upgraded material involve the use of a colloidal or molecular catalyst dispersed within a heavy oil feedstock, a hydrocracking reactor, and a hot separator. The colloidal or molecular catalyst promotes hydrocracking and other hy ...


2
Roger K Lott, Lap Keung Lee: Ebullated bed hydroprocessing methods and systems and methods of upgrading an existing ebullated bed system. Headwaters Heavy Oil, Workman Nydegger, November 11, 2008: US07449103 (16 worldwide citation)

An ebullated bed hydroprocessing system, and also a method for upgrading a pre-existing ebullated bed hydroprocessing system, involves introducing a colloidal or molecular catalyst, or a precursor composition capable of forming the colloidal or molecular catalyst, into an ebullated bed reactor. The ...


3
Roger K Lott, Lap Keung Lee, Peter C Quinn: Fixed bed hydroprocessing methods and systems and methods for upgrading an existing fixed bed system. Headwaters Heavy Oil, Workman Nydegger, April 14, 2009: US07517446 (14 worldwide citation)

A fixed bed hydroprocessing system, and also a method for upgrading a pre-existing fixed bed hydroprocessing system, involves preliminarily upgrading a heavy oil feedstock in one or more slurry phase reactors using a colloidal or molecular catalyst and then further hydroprocessing the upgraded feeds ...


4
Roger K Lott, Lap Keung Lee: Ebullated bed hydroprocessing systems. Headwaters Heavy Oil, Workman Nydegger, October 19, 2010: US07815870 (13 worldwide citation)

An ebullated bed hydroprocessing system, and also a method for upgrading a pre-existing ebullated bed hydroprocessing system, involves introducing a colloidal or molecular catalyst, or a precursor composition capable of forming the colloidal or molecular catalyst, into an ebullated bed reactor. The ...


5
Lott Roger K, Lee Lap Keung: Ebullated bed hydroprocessing methods and systems and methods of upgrading an existing ebullated bed system. Headwaters Heavy Oil, February 21, 2007: EP1753846-A2 (13 worldwide citation)

An ebullated bed hydroprocessing system, and also a method for upgrading a pre-existing ebullated bed hydroprocessing system, involves introducing a colloidal or molecular catalyst, or a precursor composition capable of forming the colloidal or molecular catalyst, into an ebullated bed reactor. The ...


6
Bing Zhou, Sukesh Parasher, Jeffrey J Hare, N Stanley Harding, Stephanie E Black, Kenneth R Johnson: Method for reducing NOx during combustion of coal in a burner. Headwaters Heavy Oil, Workman Nydegger, April 15, 2008: US07357903 (10 worldwide citation)

An organically complexed nanocatalyst composition is applied to or mixed with coal prior to or upon introducing the coal into a coal burner in order to catalyze the removal of coal nitrogen from the coal and its conversion into nitrogen gas prior to combustion of the coal. This process leads to redu ...


7
Lott Roger K, Lee Lap Keung: Hydroprocessing method and system for upgrading heavy oil using a colloidal or molecular catalyst. Headwaters Heavy Oil, NYDEGGER Rick D, November 10, 2005: WO/2005/104749 (9 worldwide citation)

Methods and systems for hydroprocessing heavy oil feedstocks to form an upgraded material involve the use of a colloidal or molecular catalyst dispersed within a heavy oil feedstock, a hydrocracking reactor, and a hot separator. The colloidal or molecular catalyst promotes hydrocracking and other hy ...


8
Roger K Lott, Yu Hwa Chang: Systems for increasing catalyst concentration in heavy oil and/or coal resid hydrocracker. Headwaters Heavy Oil, Workman Nydegger, November 13, 2012: US08309041 (6 worldwide citation)

Systems for hydrocracking a heavy oil feedstock employ a colloidally or molecularly dispersed catalyst (e.g., molybdenum sulfide) which provide for concentration of the colloidally dispersed catalyst within the lower quality materials requiring additional hydrocracking. In addition to increased cata ...


9
Lott Roger K: Methods and mixing systems for introducing catalyst precursor into heavy oil feedstock. Headwaters Heavy Oil, Lott Roger K, GUYNN John M, September 20, 2007: WO/2007/106783 (6 worldwide citation)

Methods and systems for mixing a catalyst precursor with a heavy oil feedstock preparatory to hydroprocessing the heavy oil feedstock in a reactor to form an upgraded feedstock. Achieving thorough dispersion of the catalyst precursor facilitates and maximizes the advantages of the colloidal or molec ...


10
Roger K Lott, Lap Keung Lee: Methods for hydrocracking a heavy oil feedstock using an in situ colloidal or molecular catalyst and recycling the colloidal or molecular catalyst. Headwaters Heavy Oil, Workman Nydegger, April 30, 2013: US08431016 (5 worldwide citation)

A hydrocracking system involves introducing a heavy oil feedstock and a colloidal or molecular catalyst, or a precursor composition capable of forming the colloidal or molecular catalyst, into a hydrocracking reactor. The colloidal or molecular catalyst is formed in situ within the heavy oil feedsto ...