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Cleaning of oil- contaminated granular solids, in particular spent catalysts

An oil pollution, solid technology, applied in solid solvent extraction, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as corrosion, and achieve low operating cost and low risk. Effect

Inactive Publication Date: 2008-04-23
LINDE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfur and nitrogen, typical components on spent catalysts, are converted to sulfuric acid, nitrogen oxides / nitrous acid respectively during incineration, which can cause corrosion problems

Method used

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  • Cleaning of oil- contaminated granular solids, in particular spent catalysts

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Embodiment Construction

[0038] The method according to the invention is preferably used for treating oil-contaminated catalyst particles, for example catalyst particles having an average diameter of about 5 mm. Spent catalysts are contaminated with oils, hydrocarbons, and other substances that are often pyrophoric. In addition, some toxic products bind on the catalyst surface and require proper disposal.

[0039] Catalyst particles are packed into metal baskets, which are then wrapped in plastic film. The filling process involves a certain ignition hazard because the catalyst material is contaminated with oil and other highly flammable substances. However, in refineries or petrochemical plants equipped with appropriate fire suppression means, the catalyst particles are loaded into metal baskets.

[0040] The encapsulated catalyst particles are then transferred to a carbon dioxide scrubbing facility. During transfer, the plastic film isolates the flammable catalyst material from any air, so there i...

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Abstract

The invention relates to a method for treating of oil contaminated, metal-containing solids, in particulat spent catalysts. Said solids are cleaned with a dense phase gas and then metal is recovered from said cleaned solids.

Description

technical field [0001] The present invention relates to a method for treating oil-contaminated metal-containing solids comprising a washing step to remove said oil from said solids and a metal regeneration step to regenerate metal from said washed solids. Background technique [0002] In the oil and petrochemical industries, a large number of heterogeneous catalysts are used. Metal salts are usually precipitated on solid supports and the resulting products are used to facilitate or accelerate chemical reactions. As an example, silver oxide precipitated on a solid ceramic such as alumina or silica catalyzes the partial oxidation of ethylene to ethylene oxide. Another example is that metals and metal compounds, such as nickel, vanadium, lanthanum, niobium, iron, etc., for example in the presence of hydrogen, facilitate the cracking of high molecular weight hydrocarbons to more desirable low molecular weight fractions such as gasoline, diesel, etc. . In yet another example, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B7/00C22B11/00B01J23/90B01D11/02
CPCC22B1/005C22B7/009C22B11/048Y02P10/122Y02P10/20
Inventor J·卡特豪泽H·李恩曼D·吕特哈特A·马库松
Owner LINDE AG
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