US 6,150,577 AGranted

Method for conversion of waste plastics to lube oil

AssigneeChevron U.S.A. Inc.

InventorsStephen J. Miller, Gerald P. Huffman, Naresh Shah

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Abstract

The invention includes a process of making a lubricating oil composition including: a process for making a high VI lubricating oil composition including the steps of (1) contacting a waste plastics feed including mainly polyethylene in a pyrolysis zone at pyrolysis conditions, whereby at least a portion of the waste plastics feed is cracked, thereby forming a pyrolysis zone effluent including 1-olefins and n-paraffins; (2) passing the pyrolysis zone effluent, including a heavy fraction and a middle fraction, the pyrolysis effluent middle fraction including 1-olefins, to a separations zone; where the pyrolysis effluent heavy fraction portion is separated from the pyrolysis effluent middle fraction; (3) passing the pyrolysis effluent heavy fraction to a hydrogenation zone; and (4) passing at least a portion of the hydrogenation zone effluent to a catalytic isomerization dewaxing zone, where at least a portion of the hydrogenation zone effluent is contacted with a isomerization dewaxing catalyst at isomerization dewaxing conditions thereby forming a high VI lubricating oil composition.

Claims28

Dependent claims

A process for making a high VI lubricating oil composition comprising the steps of:

(a) passing a waste plastics feed comprising polyethylene to a pyrolysis zone, having a sub-atmospheric pressure, whereby at least a portion of said waste plastics feed is cracked, thereby forming a pyrolysis zone effluent comprising 1-olefins and n-paraffins;
(b) passing said pyrolysis zone effluent to a separations zone, thereby separating said pyrolysis zone effluent into at least one heavy fraction and one middle fraction, said middle fraction comprising 1-olefins;
(c) passing at least a portion of said pyrolysis effluent heavy fraction to a catalytic hydrotreating zone wherein at least a portion of said pyrolysis effluent heavy fraction is contacted with a hydrotreating catalyst at hydrotreating conditions, thereby producing a hydrotreated pyrolysis effluent heavy fraction;
(d) passing at least a portion of said hydrotreated pyrolysis effluent heavy fraction to a catalytic isomerization dewaxing zone, wherein at least a portion of said hydrotreated pyrolysis effluent heavy fraction is contacted with an isomerization dewaxing catalyst at isomerization dewaxing conditions, wherein at least a portion of said hydrotreated pyrolysis effluent heavy fraction is converted to a high VI lubricating oil composition;
and
(e) wherein said high VI lubricating oil composition comprises a lube fraction having a kinematic viscosity at 100.degree. C. of at least about 8 cSt.

3 more elements

A process for making a high VI lubricating oil composition comprising the steps of:

(a) passing a waste plastics feed comprising polyethylene to a pyrolysis zone having a temperature of from about 600.degree. C. to about 700.degree. C. and pressure not greater than about 0.75 atm., whereby at least a portion of said waste plastics feed is cracked, thereby forming a pyrolysis zone effluent comprising 1-olefins and n-paraffins;
(b) passing said pyrolysis zone effluent, to a separations zone, thereby separating said pyrolysis zone effluent into at least one heavy fraction and one middle fraction, said middle fraction comprising 1-olefins;
(c) passing at least a portion of said pyrolysis effluent heavy fraction to a catalytic hydrotreating zone wherein at least a portion of said pyrolysis effluent heavy fraction is contacted with a hydrotreating catalyst at hydrotreating conditions, thereby producing a hydrotreated pyrolysis effluent heavy fraction;
(d) passing at least a portion of said hydrotreated pyrolysis effluent heavy fraction to a catalytic isomerization dewaxing zone, wherein at least a portion of said hydrotreated pyrolysis effluent heavy fraction is contacted with an isomerization dewaxing catalyst at isomerization dewaxing conditions, wherein at least a portion of said hydrotreated pyrolysis effluent heavy fraction is converted to a high VI lubricating oil composition;
(e) wherein said high VI lubricating oil composition comprises a lube fraction having a kinematic viscosity at 100.degree. C. of at least about 8 cSt;
and
(f) wherein said high VI lubricating oil composition has a pour point not greater than about 15.degree. F.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/224,554Filed 30 Dec 1998
Granted: 21 Nov 2000
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C10G 1/10
Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal: from…
C10G 1/002
Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal: in…
C10G 1/02
Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal: by…
C10G 65/043
Including only refining steps: at least one step being a change in the structural skeleton