Patent US3998725A successfully refreshed from Google Patents.
US3998725A
Expired / Lapsed
US
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Method of removing alkyl lead compounds from liquid hydrocarbon fuels
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1975-04-30
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Granted: 1976-12-21
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Expires: 1995-04-30
Abstract
Abstract A method for separating organometallic compounds from liquid hydrocarbons containing the same wherein the liquid hydrocarbon is contacted with a contact material comprising: an adsorbent selected from the group consisting of alumina, silica-alumina and silica gel; cupric chloride impregnated on the adsorbent; and water. The presence of water in the contact material is essential to good separation performance. The contact material may also comprise an amine which may be present either as a reaction product or a complex.
Inventors
- 👤 Abraham A. Zimmerman
- 👤 George S. Musser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:38
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/003
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
96 words
A method for separating an organolead compound from liquid hydrocarbons comprising the steps of: contacting a liquid hydrocarbon containing an organolead compound dissolved therein with a contact material, said contact material comprising between about 5 and about 20 wt. % CuCl 2 , between about 3 and 155 wt. % water and between about 65 and about 92 wt. % adsorbent, said adsorbent being selected from the group consisting of silica gel, alumina and silica-alumina, and said CuCl 2 being impregnated on said adsorbent and recovering a liquid hydrocarbon having a reduced dissolved lead content therein.
Claim 2
Independent Claim
96 words
A method for separating an organolead compound from liquid hydrocarbons comprising the steps of: contacting a liquid hydrocarbon containing an organolead compound dissolved therein with a contact material, said contact material comprising between about 5 and about 20 wt. % CuCl 2 , between about 3 and 155 wt. % water and between about 65 and about 92 wt. % adsorbent, said adsorbent being selected from the group consisting of silica gel, alumina and silica-alumina, and said CuCl 2 being impregnated on said adsorbent and recovering a liquid hydrocarbon having a reduced dissolved lead content therein.
Claim 3
Dependent Claim
43 words
The method of claim 1 wherein the adsorbent is a silica gel having a total pore volume within the range of about 0.7 to about 1.5 ml/g; and a surface area within the range of about 100 to about 800 m 2 /g.
Claim 4
Dependent Claim
37 words
The method of claim 1 wherein the contact material comprises between about 8 and 15 wt. % CuCl 2 , between about 7 and 12 wt. % water and between about 73 and 85 wt. % adsorbent.
Claim 5
Dependent Claim
42 words
The method of claim 3 wherein the adsorbent is silica gel having a total pore volume within the range from about 0.9 to about 1.3 cc/g and a surface area within the range from about 300 to about 600 m 2 /g.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein the contacting is accomplished at a temperature between about 40° and about 120° F.
Claim 7
Dependent Claim
28 words
The method of claim 5 wherein the contacting is accomplished in a fixed bed and continued for a period of time between about 0.5 and about 5 minutes.
Claim 8
Dependent Claim
16 words
The method of claim 6 wherein the liquid hydrocarbon contains less than about 0.5 g. Pb/gallon.
Claim 9
Dependent Claim
14 words
The method of claim 7 wherein said organolead compound is a tetraalkyl lead compound.
Claim 10
Independent Claim
103 words
A method for separating an organolead compound from liquid hydrocarbons comprising the steps of: contacting a liquid hydrocarbon containing an organolead compound dissolved therein with a contact material, said contact material comprising between about 5 and 20 wt. % CuCl 2 , between about 0.1 and 5.0 wt. % amine, between about 2 15 wt. % H 2 O and between about 60 and 92.9 wt. % absorbent, said adsorbent being selected from the group consisting of silica gel, alumina and silica-alumina, and said CuCl 2 being impregnated on said adsorbent, and recovering a liquid hydrocarbon having a reduced dissolved lead content therein.
Claim 11
Independent Claim
103 words
A method for separating an organolead compound from liquid hydrocarbons comprising the steps of: contacting a liquid hydrocarbon containing an organolead compound dissolved therein with a contact material, said contact material comprising between about 5 and 20 wt. % CuCl 2 , between about 0.1 and 5.0 wt. % amine, between about 2 15 wt. % H 2 O and between about 60 and 92.9 wt. % absorbent, said adsorbent being selected from the group consisting of silica gel, alumina and silica-alumina, and said CuCl 2 being impregnated on said adsorbent, and recovering a liquid hydrocarbon having a reduced dissolved lead content therein.
Claim 12
Dependent Claim
46 words
The method of claim 9 wherein said contact material comprises between about 8 and 13 wt. % cupric chloride, between about 0.5 and 3.5 wt. % amine, between about 3 and 10 wt. % H 2 O and between about 73.5 and 88.5 wt. % adsorbent.
Claim 13
Dependent Claim
22 words
The method of claim 9 wherein the molar ratio of amine to cupric chloride is within the range from 0.1:1 and 1:1.
Claim 14
Dependent Claim
22 words
The method of claim 10 wherein the molar ratio of amine to cupric chloride is within the range from 0.1:1 to 0.5:1.
Claim 15
Dependent Claim
20 words
The method of claim 12 wherein the amine is a primary mono amine having 2 to 8 carbon atoms therein.
Claim 16
Dependent Claim
11 words
The method of claim 9 wherein the adsorbent is silica gel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |