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US3893913A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of removing organometallic compounds from liquid hydrocarbons

Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1974-04-08
•
Granted: 1975-07-08
•
Expires: 1994-04-08
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Abstract

Abstract Organometallic compounds are separated from liquid hydrocarbons containing the same by contacting the liquid hydrocarbon with an activated charcoal having cupric chloride impregnated thereon. The contacting may be accomplished at any combination of temperature and pressure at which the hydrocarbon will remain liquid and at which all components used in the process will remain stable. The contacting may be accomplished in essentially any suitable fashion; however, contacting in a fixed bed of the activated charcoal is, generally, most convenient and effective. Impregnation of the activated charcoal is accomplished by contacting a suitable activated charcoal with a solution of the cupric chloride and thereafter at least partially drying the resulting mixture such that the solvent remaining therein is internally adsorbed in the activated charcoal pores. Generally, the presence of water in the impregnated activated carbon adsorbent will improve separation performance. This method of separation is particularly suited to the separation of organo lead compounds from gasoline.

Inventors

  • 👤 Abraham A Zimmerman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 10:31
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/003; C10G29/00; C10G29/02; C10G29/06; C10G29/12; C10G53/00; C10G53/02; C10G53/08

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 48 words
A METHOD FOR SEPARATING AN ORGANO LEAD COMPOUND FROM LIQUID HYDROCARBONS COMPRISING THE STEPS OF CONTACTING A LIQUID HYDROCARBON CONTAINING AN ORGANO LEAD COMPOUND DISSOLVED THEREIN WITH A SUBSTANTIALLY AMORPHOUS ACTIVATED CARBON IMPREGNATED WITH CUPRIC CHLORIDE AND RECOVERING A LIQUID HYDROCARBON HAVING A REDUCED DISSOLVED LEAD CONTENT THEREIN.
Claim 2
Independent Claim 48 words
A METHOD FOR SEPARATING AN ORGANO LEAD COMPOUND FROM LIQUID HYDROCARBONS COMPRISING THE STEPS OF CONTACTING A LIQUID HYDROCARBON CONTAINING AN ORGANO LEAD COMPOUND DISSOLVED THEREIN WITH A SUBSTANTIALLY AMORPHOUS ACTIVATED CARBON IMPREGNATED WITH CUPRIC CHLORIDE AND RECOVERING A LIQUID HYDROCARBON HAVING A REDUCED DISSOLVED LEAD CONTENT THEREIN.
Claim 3
Dependent Claim 62 words
The method of claim 1 wherein the activated carbon is impregnated with a solution of hydrous cupric chloride and the same comprises between about 5 and about 20 wt. % CuCl2, between about 0 and about 10 wt. % lower molecular weight alcohol, between about 2 and 30 wt. % water, and between about 50 and about 93 wt. % activated carbon.
Claim 4
Dependent Claim 24 words
The method of claim 2 wherein the activated carbon has an oxygen content within the range of about 3 to about 25 wt. %.
Claim 5
Dependent Claim 51 words
The method of claim 2 wherein the impregnated activated carbon comprises between about 8 and about 15 wt. % CuCl2, between about 0 and about 5 wt. % lower molecular weight alcohol, between about 5 and 20 wt. % water, and between about 65 and about 87 wt. % activated carbon.
Claim 6
Dependent Claim 66 words
The method of claim 4 wherein said activated carbon contains less than about 5 wt. % carbon having a crystalline structure; has an oxygen content within the range of about 10 to about 20 wt. %; has a total pore volume within the range of about 0.8 to about 1.2 ml/g; and exhibits a surface area within the range of about 500 to about 1000 m2/g.
Claim 7
Dependent Claim 19 words
The method of claim 2 wherein the contacting is accomplished at a temperature between about 30* and about 120*F.
Claim 8
Dependent Claim 28 words
The method of claim 6 wherein the contacting is accomplished in a fixed bed and continued for a period of time between about 1 and about 5 minutes.
Claim 9
Dependent Claim 16 words
The method of claim 7 wherein the liquid hydrocarbon contains less than about 0.5 g. Pb/gallon.
Claim 10
Dependent Claim 15 words
The method of claim 2 wherein said organo lead compound is a tetraalkyl lead compound.
Claim 11
Dependent Claim 16 words
The method of claim 9 wherein the liquid hydrocarbon contains less than about 0.5 g. Pb/gallon.
Claim 12
Dependent Claim 16 words
The method of claim 9 wherein the liquid hydrocarbon contains less than about 0.3 g. Pb/gallon.
Claim 13
Dependent Claim 16 words
The method of claim 7 wherein the liquid hydrocarbon contains less than about 0.3 g. Pb/gallon.

References Cited (Backward Citations)

US1769794A Cited
US1814410A Cited
US1988114A Cited
US2392846A Cited
US2884369A Cited
US3793185A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-07-07 1979-01-06 1979-07-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-07-07 1983-01-06 1983-07-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-07-07 1987-01-06 1987-07-08 $7700.00 Window Closed / Lapsed

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