Presulfiding OCR catalyst replacement batches

Inactive Publication Date: 2005-01-13
CHEVROU USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

FIG. 3 shows the improved desulfurization performance

Problems solved by technology

Frequent shutdowns to remove metal fouled catalyst is a major expens

Method used

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  • Presulfiding OCR catalyst replacement batches
  • Presulfiding OCR catalyst replacement batches
  • Presulfiding OCR catalyst replacement batches

Examples

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examples

The catalytic particulates comprised an alumina porous carrier material or alumina inorganic support. Deposited on and / or in the alumina porous carrier material was an oxidic hydrotreating catalyst component consisting of NiO and / or MoO3. The Mo was present on and / or in the alumina porous carrier material in an amount of about 3% by wt., based on the combined weight of the alumina porous carrier material and the oxidic hydrotreating catalyst component(s). The Ni was present on and / or in the alumina porous carrier material in an amount of about 1% by wt., based on the combined weight of the alumina porous carrier material and the oxidic hydrotreating catalyst component(s). The surface area of the catalytic particulates was about 120 sq. meters per gram.

The plurality of catalytic particulates were generally spherical with a mean diameter having a value ranging from about 6 Tyler mesh to about 8 Tyler mesh and an aspect ratio of about 1. The mean crush strength of the catalytic part...

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Abstract

Catalyst particles are presulfided in a pretreatment zone separate from a hydroconversion reaction zone. The presulfided catalyst is then added to a moving bed of catalyst in the hydroconversion reaction zone at reaction pressure, so that the reactor is not shut down to replace catalyst. The presulfiding process is particularly beneficial for use in moving bed reactors for heavy oil conversion.

Description

BACKGROUND OF THE INVENTION The present invention relates to a method for extending the catalytic life of catalyst used in hydroprocessing of a hydrocarbon feed stream. More particularly, the present invention provides for a method for presulfiding hydroprocessing catalyst in order to improve operability, reduce catalyst fouling rate, and extend the catalytic life of a catalyst bed employed in a hydroconversion reaction zone during hydroprocessing. The present invention more particularly provides for a method for presulfiding hydroprocessing catalyst ex-situ before transferring presulfided hydroprocessing catalyst into a hydroprocessing reactor system. The method is intended to improve the operability and reduce catalyst fouling rate, and to extend the catalytic life of a generally “packed catalyst bed” in the hydroprocessing reactor system that is preferably capable of onstream catalyst replacement. The methods of the present invention may also be advantageously practiced in hydro...

Claims

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Application Information

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IPC IPC(8): C10G45/04
CPCC10G45/04
Inventor LEUNG, PAK C.EARLS, DAVID E.REYNOLDS, BRUCE E.JOHNSON, DAVID R.BACHTEL, ROBERT W.TRIMBLE, HAROLD J.
Owner CHEVROU USA INC
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