A catalytic composition for the conversion of hydrocarbons comprising a combination of a refractory inorganic oxide support with 0.01 to 5 mass% on an elemental basis of a Group IVA(IUPAC 14) metal component, 0.01 to 2 mass % on an elemental basis of a platinum metal component, and 0.05 mass % on an elemental basis ...

A system for transporting particulate material uses a combination of non-mechanical valves and pneumatic and gravity transport to reduce breakage of particulate material. This system is particularly useful for the conveyance of catalyst particles where a lift conduit raises the particles from a low elevation to a re...

A process for the production of light olefins from a hydrocarbon gas feedstream, comprising methane and/or ethane, which comprises: a) passing said feedstream in combination with a water stream to a syngas production zone at a syngas temperature of 700 to 1100°C and a syngas pressure of 2 to 75 Mpa to produce a sy...

In using calcium-exchanged forms of zeolite X as selective adsorbents for nitrogen in PSA air separation process, it has been discovered that, particularly under certain temperature and pressure conditions, superior performance is not, as is generally believed, obtained when the calcium content is at a maximum, but ...

The effective utilization of available stripping medium in an FCC process is hcreased by using a cyclonic separation method and apparatus to discharge particulate solids and gaseous fluids into a separation vessel from a discharge opening of a central conduit and to withdraw separated gaseous fluids from the separat...

A novel catalyst and the use thereof in a hydrocarbon conversion process is disclosed. The catalyst comprises a refractory inorganic oxide, platinum-group metal, Group IVA(IUPAC 14) metal, and europium in a specified ratio. Utilization of this catalyst in the conversion of hydrocarbons, especially in reforming, resu...

Trace quantities of polynuclear aromatic compounds are removed from the vapor effluent of a hydrocarbon dehydrogenation zone containing normally gaseous olefinic hydrocarbons, trace mononuclear aromatic, compounds and trace polynuclear aromatic compounds by cooling the vapor effluent to condense at least a portion t...

A process is disclosed for the shut-down of a membrane separation zone comprising a non-permeate side and a permeate side and processing a feed stream comprising a non-permeable component, a less-readily permeable, condensible component, and a readily permeable component. When the feed stream is not passed to the me...

A naphtha feedstock is catalytically reformed in a combination sequence comprising a continuous-reforming zone, consisting essentially of a moving-bed catalytic reforming zone with continuous regeneration of catalyst particles, followed by a zeolitic-reforming zone containing a catalyst comprising a platinum-group m...

Light olefins are produced from a hydrocarbon gas stream by a combination of steam reforming, oxygenate production, and oxygenate conversion to olefm wherein a crude methanol stream - produced in the production of oxygenates and comprising methanol, light ends, and heavier alcohols - is passed directly to the oxygen...

A system for transporting particulate material uses a combination of non-mechanical valves and pneumatic and gravity transport to reduce breakage of particulate material. This system is particularly useful for the conveyance of catalyst particles where a lift conduit raises the particles from a low elevation to a re...

Light olefins are produced from an oxygenate feedstream by ontacting the oxygenate feedstream in the presence of a methane diluent in a reaction zone containing a metal aluminium phosphate molecular sieve (ELAPO) catalyst at conditions selective for the conversion of at least a portion of the feedstock into light ol...

Contaminant metal ions are removed from a liquid stream by a process involving contacting at adsorption conditions the liquid stream with a novel crystalline molecular sieve which has a crystal structure which is an intergrowth of the pharmacosiderite and sitinakite structures. The molecular sieve has an emp...