Atlantic Richfield Company

Marvin F Johnson

John A Jaecker

Henry Erickson

E William Breder, Jr

John A Sofranko

C Andrew Jones

John J Leonard

Howard P Withers, Jr

John Mooi

Elmer W Breder, Jr

A class of mixed oxide catalysts comprising Mn-containing oxides, alkali metals or compounds thereof, and at least one member of the group consisting of oxides of Si, oxides of alkaline earth metals, and mixed oxides of Si and at least one alkaline earth metal. In the more preferred embodiments, the third component serves as a carrier for the Mn and alkali metal components. The composition preferably comprises a major amount of the carrier material and minor amounts of the other components. The compositions are useful for hydrocarbon coversion, methane conversion, and oxidative dehydrogenation processes characterized by formation of coproduct water.

Alkali promoted manganese oxide compositions containing silica and/or

An improved method for converting methane to higher hydrocarbon products by contacting at a selected temperature at least one reducible oxide of at least one metal, associated with a hydroxylated magnesia support (that is, magnesia derived from magnesium hydroxide or a magnesium-containing component contacted with hydroxyl-containing material).

Hydroxylated magnesia support

An improved method for converting methane to higher hydrocarbon products by contacting a gas comprising methane with a contact agent at a selected temperature, the agent comprising a reducible metal oxide, a support of at least two oxides, and an alkali metal.

Methane conversion using a silica/magnesia support

An improved method for converting methane to higher hydrocarbon products by contacting a gas comprising methane with a contact agent at a selected temperature, the agent comprising a reducibile metal oxide, a support of at least two oxides, and an alkali metal.

Methane conversion using a magnesia/silica support

A process for reforming naphthene and paraffin-containing hydrocarbon feeds to increase their aromatic content is disclosed which involves the use of a series of reaction zones containing a supported platinum-group metal catalyst and a supported rhenium catalyst, wherein the distribution of catalytically effective platinum-group metal and rhenium among the series of reaction zones is skewed. The ratio of the percent by weight of the supported platinum-group metal in the catalyst in at least one of the earlier reaction zones of the series of reaction zones to that in the catalyst in at least one of the later reaction zones is in the range of about 1.5 to 10, and preferably in the range of about 2 to about 6. The percent by weight of supported rhenium based on the catalyst in the first zone is preferably less than about 10 percent by weight. Broadly, in the skewed distribution of supported platinum-group metal and rhenium, the ratio of the platinum-group metal to rhenium in the earlier zones is greater than about 1.5, and the ratio of platinum-group metal to rhenium in the later zones is less than about 1.

Plural stage reforming with catalysts having a skewed distribution of a

Thermal stability of a halide-promoted, supported noble metal reforming catalyst is improved by employing a modified alumina support whose alumina precursor comprises at least about 75 weight percent boehmite, having an average crystallite diameter no greater than about 60 Angstroms. The thermal stability of the support is improved by the inclusion of a minor amount of silica, preferably added as an alkali-metal silicate to a mull of alumina prior to its extrusion and calcination with subsequent washing to remove the alkali metal.

Stabilized reforming catalyst

Thermal stability of a halide-promoted, supported noble metal reforming catalyst is improved by employing a modified alumina support whose alumina precursor comprises at least about 75 weight percent boehmite, having an average crystallite diameter no greater than about 60 Angstroms. The thermal stability of the support is improved by the inclusion of a minor amount of silica, preferably added as an orthosilicate ester to a mull of alumina prior to its extrusion and calcination.

Thermal stability of a halide-promoted, alumina-supported noble metal reforming catalyst is improved by employing an alumina support precursor which comprises at least about 75 weight percent boehmite, having an average crystallite diameter no greater than about 60 Angstroms.

Thermal stability of a halide-promoted, supported noble metal reforming catalyst is improved by employing a modified alumina support whose alumina precusor comprises at least about 75 weight percent boehmite, having an average crystallite diameter no greater than about 60 Angstroms. The thermal stability of the support is improved by the inclusion of a minor amount of silica, preferably added as a low-sodium colloidal silica dispersion to a mull of alumina prior to its extrusion and calcination.

An improved method for preparing a hydrocarbon hydrotreating catalyst containing a major amount of alumina and a minor amount of at least one Group VIB or Group VIII metal comprising:

Hydrocarbon hydrotreating process

Phosphorous-containing catalyst and method for preparing and using same

An improved method of hydrocarbon hydrotreating is disclosed wherein the activity of a hydrotreating catalyst is determined prior to the catalyst being used to promote hydrocarbon hydrotreating. The catalytic activity of such a catalyst is determined by comparing a parameter involving the relative reflectance of the catalyst relative to the relative reflectance of a standard catalyst having acceptable activity. When it is determined that a given catalyst has catalytic activity at least essentially equal to that of the standard catalyst, the catalyst may be used to promote hydrocarbon hydrotreating thus providing an improved method of hydrocarbon hydrotreating.

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Homewood, IL, United States of America

Marvin F Johnson