Process for reduction of content of sulphur compounds and polyaromatic hydrocarbons in distillate fuels

a technology of distillate fuel and polyaromatic hydrocarbon, which is applied in the direction of fuels, metal/metal-oxide/metal-hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of loss of revenue, high cost, and thermodynamic limitation of equilibrium conversion of pah compounds
US20020117425A1Inactive Publication Date: 2002-08-29HALDOR TOPSOE AS
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
HALDOR TOPSOE AS
Publication Date
2002-08-29
Estimated Expiration
Not applicable · inactive patent
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Abstract

A process for reducing content of sulphur compounds and polyaromatic hydrocarbons in a hydrocarbon feed having a boiling range between 120° C. and 450° C., which process comprises in combination contacting the feed and hydrogen over a hydrotreating catalyst and hydrotreating feed at hydrotreating conditions, cooling the effluent consisting of hydrocarbon, polyaromatic hydrocarbons, hydrogen sulphide and hydrogen-rich gas from the hydrotreating reactor, contacting said effluent and hydrogen gas over a hydrotreating catalyst in a post treat reactor at a temperature appropriate to lower the polyaromatic hydrocarbon content.
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Description

[0001] The present invention is directed towards the improvement of distillate fuels. More particularly, the invention relates a process for reducing concentration of sulphur and polyaromatic compounds in those fuels.

[0002] Many countries are in the process of tightening specifications for the sulphur content of diesel fuels. For example, current legislation specifies a maximum sulphur content in diesel in the European Union of 50 wppm from the year 2005, and in California 15 wppm from 2004. Current specifications for low sulphur diesel fuel in many cases also include limits for the maximum content of polyaromatic hydrocarbons, for the maximum density (or specific gravity) and for the minimum cetane number. It is expected that the specification for all three properties will be tightened further in the near future to meet requirements for reduced emissions from diesel engines.DESCRIPTION OF PRIOR ART

[0003] Sulphur can be removed by means of hydrotreating. The diesel fuel is passed ov...

Claims

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