Uop Lcc

Mark A Krawczyk

Ivar Martin Dahl

Arne Karlsson

Ara J Alexanian

Jonny Engedahl

Christopher P Nicholas

Kristoffer E Popp

Jennifer F Abrahamian

Duncan E Akporiaye

Maureen L Bricker

R Joe Lawson

Richard E Marinangeli

J W Sachtler

Charles P McGonegal

J W Adriaan Sachtler

Martin Plassen

Ara J Alexianin

Charles P Mcgonegal

A process for olefin metathesis is disclosed. The process involves contacting a feedstock comprising a first olefin and a second olefin having a carbon number at least two greater than that of the first olefin with a catalyst comprising a tungsten component on a refractory oxide support, e.g. silica at metathesis conditions to provide a product olefin having an intermediate carbon number between that of the first and second olefin. The catalyst is characterized in that it is first pretreated with hydrogen followed by treatment with ethylene.

Olefin metathesis process using a treated tungsten oxide catalyst

Acid washing of silica supports, used for supported tungsten catalysts, improves the activity of the resulting catalyst (i.e., its conversion level at a given temperature) for the metathesis of olefins, without compromising its selectivity to the desired conversion product(s). Exemplary catalysts and processes include those for the production of valuable light olefins such as propylene from a hydrocarbon feedstock comprising ethylene and butylene.

Acid washed silica supported catalysts and their use in olefin metathesis

Silica supports having a surface area from about 250 m/g to about 600 m/g and an average pore diameter from about 45 &#x212b; to about 170 &#x212b;, used for supported tungsten catalysts, improves the activity of the resulting catalyst (i.e., its conversion level at a given temperature) for the metathesis of olefins, without compromising its selectivity to the desired conversion product(s). Exemplary catalysts and processes include those for the production of valuable light olefins such as propylene from a hydrocarbon feedstock comprising ethylene and butylene.

Support properties of silica supported catalysts and their use in olefin metathesis

A process vessel containing both an evaporation zone for evaporating a liquid feed and a treatment zone for treating the resulting vapor comprises an injector having an orifice, the orifice being in the evaporation zone, at least one evaporation surface for evaporating feed and generating vapor, the evaporation surface being located in the evaporation zone, wherein the injector orifice and the evaporation surface are positioned to prevent the formation of a drop at the orifice, a treatment zone for treating the vapor and at least one heater associated with at least a portion of the process vessel.

Process vessel with integral evaporator

A process and an assembly for simultaneously evaluating a plurality of catalysts is provided wherein the flow rate of a reactive fluid to each of a plurality of reactors is automatically adjusted based on the measured amount of catalyst sample in each reactor to concurrently obtain a substantially identical fluid space velocity in each of the reactors.

Process and assembly for simultaneously evaluating a plurality of catalysts

An apparatus and a method for rapidly generating a plurality of isolated effluents have been developed. A specific embodiment involves screening a plurality of solids through simultaneously contacting the members of the plurality with a fluid, sampling the resulting fluids, and processing the resulting fluids to, for example, determine changes as compared to the feed fluid or as compared to other resulting fluids.

Elevated pressure apparatus and method for generating a plurality of isolated effluents

A process for evaporating a liquid feed and reacting said feed in the presence of catalyst to make product within a reactor having both an evaporation zone and a reaction zone comprises the steps of providing packing in the evaporation zone, providing catalyst in the reaction zone, introducing the liquid feed to the evaporation zone through an injector having an orifice, where the orifice and the packing define a gap that is sufficiently small to interfere with the formation of a liquid drop at the orifice, vaporizing the liquid feed within the evaporation zone to form a vapor, flowing the vapor to the reaction zone and contacting, at reaction conditions, the vapor with a catalyst to form product.

Process of vaporizing and reacting a liquid feed

A reactor for evaporating liquid feed and reacting said feed in the presence of catalyst to make product comprises a housing having at least one inlet and at least one outlet and encasing an evaporation zone and a reaction zone, an injector passing through the inlet and having an orifice in the evaporation zone for introducing a liquid feed, an insert containing packing for vaporizing the liquid feed where the packing is in the evaporation zone, a receptacle for retaining catalyst in the reaction zone and at least one heater associated with at least a portion of the reactor, wherein the injector orifice and the packing define a gap between the orifice and the packing sufficiently small to interfere with the formation of a drop at the orifice.

Catalytic reactor with integral evaporator

Linear alpha-olefin formation via oligomerization of ethylene using transition metal catalysis leads to a Schultz-Flory distribution of oligomers. At modest temperatures formation of heavy oligomers which are waxy solids only partly soluble in the LAO product mix causes reactor plugging and curtailing the time of continuous runs. Recycling a portion of a lighter oligomeric fraction obviates this problem and permits runs uninterrupted by solids formation.

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Chicago, IL, United States of America

Mark A Krawczyk