Exxon Research and Engineering Company

Exxon Chemical Products Inc.

Albert E Schweizer

Robert J Wittenbrink

Ian A Cody

William John Murphy

Daniel Francis Ryan

James J Schorfheide

Michael F McDonald, Jr

Russell J Koveal

Janet Renee Clark

William G DePierri

A high VI and low pour point lubricant base stock is made by hydroisomerizing a high purity, waxy, paraffinic Fischer-Tropsch synthesized hydrocarbon fraction having an initial boiling point in the range of 650-750&deg; F., followed by catalytically dewaxing the hydroisomerate using a dewaxing catalyst comprising a catalytic platinum component and an H-mordenite component. The hydrocarbon fraction is preferably synthesized by a slurry Fischer-Tropsch using a catalyst containing a catalytic cobalt component. This combination of the process, high purity, waxy paraffinic feed and the Pt/H-mordenite dewaxing catalyst, produce a relatively high yield of premium lubricant base stock.

Isoparaffinic base stocks by dewaxing fischer-tropsch wax hydroisomerate over Pt/H-mordenite

An improved catalyst for the production of lube oil blending components, and lube oils, from waxy, paraffinic feeds, a process for producing such catalyst, and a process utilizing this catalyst in the production of lubes. The catalyst is a unitized mixed powder pellet catalyst constituted of a dehydrogenation component, or components, suitably a catalytically active Group VIB, VIIB, or VIII metal, or metals, an isomerization component, suitably an amorphous acidic solid support, and a small pore molecular sieve dewaxing component. The dewaxing component is characterized as a small pore molecular sieve wherein the pore windows are formed by 8 oxide atoms which form the limiting edge of the pore window, each of the oxide atoms constituting one of the four oxide atoms of a tetrahedrally coordinated cluster around a silicon or aluminum framework ion, or atom, each oxide ion is coordinated to two framework ions in these structures, and the pore size of the sieve ranges between about 6.3 .ANG. and 2.3 .ANG.. In preparation of the catalysts, the isomerization component, or the dewaxing component, or both, may provide the dehydrogenation function due to the presence of a catalytic metal, or metals, deposited thereon, in which case the components are powdered, the powders mixed together, compressed and formed into solids catalyst shapes comprised of these components. Alternatively, the dehydrogenation function can be added to preformed solids shapes made from powdered dewaxing and isomerization components.

Processes an catalyst for upgrading waxy, paraffinic feeds

A process for reducing the loss of monomers from a polymerization recycle stream comprising steam treating a molecular sieve used to dry the recycle stream to remove acidic sites within the sieve. The steam treatment is conducted at a temperature of between 150.degree. C. and 300.degree. C. for 2 to 24 hours.

Deactivation of drier material for olefin reactions

Disclosed is a method for starting up a cyclic or semi-cyclic reforming reactor after catalyst regeneration. The method mitigates disruptions to the reforming unit after catalyst regeneration, such as excessive light gas make and a decrease in recycle hydrogen purity.

Cyclic reforming catalyst regeneration

Disclosed is a process for catalytically reforming a gasoline boiling range hydrocarbonaceous feedstock in the presence of hydrogen in a reforming unit comprised of a plurality of serially connected reactors wherein one or more of the reactors contains a noble metal-containing zeolite catalyst selected from alkaline faujasites and L-type zeolite which zeolites are prepared by a: (a) treating the alkaline faujasite or L-type zeolite with one or both of Pt(acetylacetonate).sub.2 or Pd(acetylacetonate).sub.2 for an effective amount of time; and (b) calcining the so treated zeolite at a temperature from about 250.degree. C. to about 600.degree. C. for an effective amount of time.

Catalytic reforming process using noble metal alkaline zeolites

Disclosed is a method for isomerizing paraffinic hydrocarbons which comprises contacting the paraffinic hydrocarbon with a noble-metal containing zeolite catalyst under isomerization conditions. The noble-metal catalyst are prepared by treating a zeolite selected from the acidic zeolites, LZ-210 type zeolites, and mordenite, with a noble-metal compound selected from Pt(acetylacetonate).sub.2 and Pd(acetylacetonate).sub.2.

Isomerization using noble metal acidic zeolites

Disclosed is a method for preparing noble-metal containing zeolite materials suitable for isomerization reactions. The catalysts are prepared by contacting an zeolite selected from the acidic faujasite, LZ-210 type zeolites and mordenite with an effective amount of a noble metal compound selected from Pt(acetylacetonate).sub.2 or Pd(acetylacetonate).sub.2 then calcining at a temperature from about 250.degree. C. to 600.degree. for an effective amount of time.

Noble metal acidic zeolites for isomerization

Disclosed is a process for preparing noble metal-containing zeolites suitable for use in catalytic reforming which process comprises: (a) treating an alkaline faujasites or L-type zeolites with Pt(acetylacetonate).sub.2 or Pd(acetylacetonate).sub.2 for an effective amount of time to form a substantially homogeneous mixture and to incorporate Pt and/or Pd into the pore regions of the zeolite, but not to disperse it throughout the entire zeolite; and (b) calcining the mixture at a temperature from about 250.degree. C. to about 600.degree. C. for an effective amount of time.

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Baton Rouge, LA, United States of America

Albert E Schweizer