Process of used lubricant oil recycling

a technology of used lubricant oil and recycling, which is applied in the direction of cracking process, coking carbonaceous materials, lubricant composition, etc., can solve the problems of serious logistical problems in the refinery process, coking and fouling of the process lines, and the inability to re-refining the used oils to produce base lubricant oil stocks. not a completely satisfactory approach

Inactive Publication Date: 2000-10-24
MOBIL OIL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

In view of the environmental concerns for hazardous liquid waste disposal methods and the scarcity of fuel re...

Problems solved by technology

However, problems with reintroducing used oil to the refinery process are severalfold.
Certain residual materials such as metals and lubricant additives in the lubricating oils present serious logistical problems to the refinery process.
Problems include locating a process step which can accept used lubricating oils without the risks of fouling catalysts, contaminating process streams and causing co...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example

To illustrate the effect of this process on an existing delayed coker unit, a test run is performed on a commercial coker feedstock. The composition of furnace feed samples comprise a normal coker feed injected with a lubricant oil slop which is comparable to a used lubricating oil. The metals content of the lubricating oil slop is shown in Table 2. For comparative purposes, the metals content of a conventional coker feed is also shown in Table 2. The metals content in both is evaluated before the test and during the test. In the test run, the used lubricant is injected without preheat and at a relatively low injection rate of 1.35% by volume of the total feed. The test is conducted under the steady state conditions as set forth in Table 3. The process is fitted with a 6.5 gpm positive displacement pump capable of 150 psig discharge pressure and a local flow meter ranged for 159 B / D. Steam is used to prevent pluggage of the connection and to mix the lubricant into the coker furnace ...

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PUM

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Abstract

A used lubricant oil recycling process is disclosed in which a used lubricating oil is injected to a delayed coker downstream of the coker furnace whereby the used oil is thermally cracked into hydrocarbon fuel products which are low in metal contaminants, sulfur and nitrogen. The used lubricant can be preheated in an independent heater to avoid a quenching effect of the process stream when added in an amount greater than about 3% by volume based on the entire volume of the feed.

Description

FIELD OF THE INVENTIONThe invention relates to a process for reclaiming used lubricating oils and an economical process of producing a full range of refinery liquid and gaseous products from used lubricants. Specifically, the invention relates to converting used lubricating oils into quality hydrocarbon products by injecting the used oil as a feed to a delayed coker downstream of the coker furnace.BACKGROUND OF THE INVENTIONDepletion of the world's petroleum reserves and increased concern for the environment are incentives for refiners to search for methods of reclaiming used lubricating oils.The growing concern for environmental protection has prompted Congressional interest in mandating waste recycling laws. Used lubricating oils are among the wastes of interest. Proposed legislation has been directed towards implementing management standards for used oil recycling. The major focus of certain proposals has been to reintroduce used lubricants to the refinery process. Specific propo...

Claims

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Application Information

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IPC IPC(8): C10G9/00C10B57/04C10B57/00C10M175/00C10G1/00C10B55/00C10M175/02
CPCC10B55/00C10M175/0025C10G9/005C10B57/045C10G9/04
Inventor SPARKS, STEVEN W.TEITMAN, GERALD J.VISCONTINI, SALVATORE T. M.
Owner MOBIL OIL CORP
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