Chevron U.s.a. Inc.

University of California

Other

Chevron Oronite Company LLC

Dow Global Technolgoies LLC

Alexander E Kuperman

Theodorus Ludovicus Michael Maesen

Theodorus Maesen

Oleg Mironov

Dennis Dykstra

Xiaoying Ouyang

Jinyi Han

Axel Brait

Darren P Fong

Cong-Yan Chen

Bruce Edward Reynolds

Julie Chabot

Horacio Trevino

Joseph V Nguyen

Soy Uckung

Rahul Shankar Bhaduri

Viorel Duma

Stephen Joseph Miller

Huping Luo

Alexander S Katz

Lin Li

Jaime R Lopez

William James Cannella

Shuwu Yang

Alexander Okrut

Ling Jiao

Dennis John O'Rear

Charles R Wilson

Michael Moir

Kaidong Chen

Bo Kou

De Q Vu

Erin Maris

Ibrahim J Uckung

Christopher J Dillon

Curtis Bay Campbell

Ujjal Mukherjee

William L Schinski

Andrew Rainis

Douglas G Naae

Ron Runnebaum

Cedrick Mahieux

Andrew Solovyov

Varut Komalarajun

Namal De Silva

Christopher Paul Dunckley

Igor Busygin

Ibrahim Uckung

Bi-Zeng Zhang

Partha Nandi

Louis Joseph Nordrum

Derek Blackwell

Alex Yoon

Hyunuk Ryu

Darren Fong

Robert G Bowman

George E Hartwell

Bi-Zeng Zhan

Howard W Clark

Zhen Zhou

Shabbir Husain

David Gordon Barton

Zunqing He

Michael Dubrovsky

Donald Kuehne

Ping Wang

Lucy Melinda Bull

Thomas Francis Finger

Modinat Kotun

Theodoras Ludovicus Michael Maesen

Kenneth Kwik

Michael E Moir

Erin P Maris

Douglas Gene Naae

William Lawrence Schinski

Dennis J O'REAR

The present disclosure refers to systems and methods for producing hydrogen among other products. In some embodiments the methods comprise sequentially conducting a cracking step in a fixed bed mode and conducting a flowing step in a fluidized bed mode. Such sequential processes may result in a number of advantages including, for example, regenerating the catalyst during the fluidized bed mode in a manner such that beneficial heat is generated for use in the endothermic cracking step.

Alternating fixed and fluidized bed reactor systems and processes

The present disclosure refers to systems and methods for efficiently converting a C-Calkane such as natural gas to a liquid C-Cproduct and hydrogen. Generally, the process comprises flowing the C-Calkane through a plurality of tubes within a vessel wherein the tubes house a catalyst for converting the C-Calkane to the liquid C-Cproduct and hydrogen. The C-Calkane is heated under suitable conditions to produce the liquid C-Cproduct and hydrogen. Advantageously, the C-Calkane is heated by burning a fuel outside the tubes in fuel burning nozzles configured to transfer heat from the burning through the tubes.

Multi-tube reactor systems and processes for no-oxidative conversion of methane

Bulk catalysts comprised of nickel, molybdenum, tungsten and titanium and methods for synthesizing bulk catalysts are provided. The catalysts are useful for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.

Tetrametallic bulk hydroprocessing catalysts

Multi-metallic bulk catalysts and methods for synthesizing the same are provided. The multi-metallic bulk catalysts contain nickel, molybdenum tungsten, niobium, and optionally, titanium and/or copper. The catalysts are useful for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.

Multi-metallic bulk hydroprocessing catalysts

Multi-metallic bulk catalysts and methods for synthesizing the same are provided. The multi-metallic bulk catalysts contain nickel, molybdenum tungsten, copper, and optionally, titanium and/or niobium. The catalysts are useful for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.

Multi-metallic bulk catalysts and methods for synthesizing the same are provided. The multi-metallic bulk catalysts contain nickel, molybdenum tungsten, yttrium, and optionally, copper, titanium and/or niobium. The catalysts are useful for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.

A layered catalyst reactor system and process for hydrotreatment of hydrocarbon feedstocks. The layered catalyst system reactors comprise vertical bed layers including a demetallization catalyst layer, multiple layers of supported hydrotreating catalyst layer, and multiple alternating layers of supported hydrocracking catalysts and self-supported hydrotreating catalysts. The arrangement of the catalyst layers mitigates the risk of temperature run-aways, with improvements in hydrotreatment performance.

Layered catalyst reactor systems and processes for hydrotreatment of hydrocarbon feedstocks

A catalyst system has been designed that disrupts the sedimentation process. The catalyst system achieves this by saturating key feed components before the feed components are stripped into their incompatible aromatic cores. The efficacy of this disruptive catalyst system is particularly evident in a hydrocracker configuration that runs in two-stage-recycle operation. The catalyst is a self-supported multi-metallic catalyst prepared from a precursor in the hydroxide form, and the catalyst must be toward the top level of the second stage of the two-stage system.

Catalytic remedy for advanced UCO bleed reduction in recycle hydrocracking operations

A process is disclosed for opening naphthenic rings of naphthenic ring-containing compounds. Naphthene ring opening is achieved using a self-supported mixed metal sulfide catalyst comprising nickel sulfide, molybdenum sulfide, tungsten sulfide and an organic complexing agent. The catalyst is characterized as having a composition of metal components, in terms of molar ratios; as follows: 0.25&#x2264;Ni/(Ni+Mo+W)&#x2264;0.80; 0&#x3c;Mo/(Ni+Mo+W)&#x2264;0.25; 0.12&#x2264;W/(Ni+Mo+W)&#x2264;0.50; and 1.5&#x2264;W/Mo&#x2264;3.0.

Naphthene ring opening over self-supported multi-metallic catalysts

A process for treating spent catalyst containing heavy metals, e.g., Group VIB metals and Group VIII metals is provided. In one embodiment after deoiling, the spent catalyst is treated with an ammonia leach solution under conditions sufficient to dissolve the group VIB metal and the Group VIII metal into the leaching solution, forming a leach slurry. After solid-liquid separation to recover a leach solution, chemical precipitation and solids repulping is carried out to obtain an effluent stream containing ammonium sulfate (Amsul), ammonium sulfamate, Group VB, Group VIB and Group VIII metals. Following sulfidation, the Group VIII metal is fully removed and Group VB and Group VI metals are partially removed from the Amsul stream. In the additional steps of oxydrolysis and iron precipitation, an effective amount of ferric ion at a pre-select pH is added to form insoluble complexes with the Group VB and Group VIB metals, which upon liquid-solid separation produces an effluent ammonium sulfate stream containing less than 10 ppm each of the Group VB and Group VIB metals.

Process for separating and recovering metals

Disclosed herein is a process for preparing an isomeric mixture comprising a major amount of a para-branched mono-alkyl-substituted hydroxyaromatic compound. The process involves the steps of: (a) providing an isomeric mixture comprising a major amount of a para-di(alkyl-substituted)aromatic compound; wherein a first alkyl substituent is a Cto Calkyl moiety and a second alkyl substituent is a Cto Cbranched alkyl moiety, wherein n is 0 to 42 and further wherein the second alkyl substituent is at least one carbon atom greater than the first alkyl substituent; (b) subjecting the isomeric mixture comprising a major amount of a para-di(alkyl-substituted)aromatic compound to oxidation conditions in the presence of an oxygen-containing source, thereby converting the first alkyl substituent which is a Cto Calkyl moiety to a hydroperoxide-containing substituted moiety to produce an isomeric mixture comprising a major amount of a para-branched alkyl-substituted, hydroperoxide-containing substituted aromatic compound; and (c) converting the hydroperoxide-containing substituted moiety to a hydroxyl moiety thereby providing an isomeric mixture comprising a major amount of a para-branched mono-alkyl-substituted hydroxyaromatic compound.

Process for preparing a para-branched alkyl-substituted hydroxyaromatic compound

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Orinda, CA, United States of America

Alexander E Kuperman