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Layered Spherical Catalysts with High Accessibility Index

A catalyst and outer layer technology, applied in the field of hydrocarbon conversion, can solve problems such as difficult control of uniformity

Inactive Publication Date: 2011-12-14
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Uniformity is said to be difficult to control for smaller diameter balls (less than 1 / 8")

Method used

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  • Layered Spherical Catalysts with High Accessibility Index
  • Layered Spherical Catalysts with High Accessibility Index
  • Layered Spherical Catalysts with High Accessibility Index

Examples

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Embodiment Construction

[0014] Ethylene and propylene, light olefins with 2 or 3 carbon atoms per molecule, respectively, are important chemicals used in the production of other useful materials such as polyethylene and polypropylene. Polyethylene and polypropylene are the two most commonly used plastics found today, with a wide range of uses as materials for manufacturing and packaging. Other uses of ethylene and propylene include the production of vinyl chloride, ethylene oxide, ethylbenzene and alcohols. Steam cracking or pyrolysis of hydrocarbons produces mostly ethylene and some propylene. Ethylene is produced by several means such as steam cracking of hydrocarbons, catalytic cracking of hydrocarbons, or olefin cracking of larger olefin feedstocks. However, the ethylene used in polyethylene production needs to be substantially pure. The process for producing ethylene produces a product stream having a substantial amount of acetylene, which may be as high as 2-3% by volume of the ethylene / ethan...

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Abstract

A method and catalyst for the selective hydrogenation of acetylene to ethylene are provided. The catalyst comprises a layered structure in which the catalyst has an inner core and an outer layer with active material. The catalyst also includes a metal deposited on the outer layer, and the catalyst is formed such that the catalyst has an accessibility index of 3-500.

Description

field of invention [0001] The present invention relates to layered catalyst compositions, processes for preparing the compositions and hydrocarbon conversion processes using the compositions. The layered composition comprises an inner core and an outer layer bonded to the inner core and comprising an inorganic oxide. Background of the invention [0002] Palladium-based catalysts are used in a large number of hydrocarbon conversion processes. In many applications, accelerators and modifiers are also used. One such method of hydrocarbon conversion is the dehydrogenation of hydrocarbons, especially alkanes such as isobutane, to convert isobutane to isobutene. For example US 3,878,131 (and related US 3,632,503 and US 3,755,481) discloses a catalyst comprising platinum metal, a tin oxide component and a germanium oxide component. All components are uniformly dispersed throughout the alumina support. US 3,761,531 (and related US 3,682,838) discloses a platinum group component ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J35/08C07C5/09C07C11/04
CPCC07C2523/89B01J23/8926C07C2523/62C07C2523/66B01J23/58B01J35/008B01J23/50B01J37/0221B01J35/002B01J23/52B01J35/023B01J37/0242C07C5/09B01J23/622Y02P20/52C07C11/04B01J23/72B01J35/08
Inventor G·J·加吉达B·K·戈罗维A·内伊兹M·G·赖利J·J·塞内塔E·M·霍尔莫格林
Owner UOP LLC