Patent US4839029A successfully refreshed from Google Patents.
US4839029A
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Process for removing arsenic from a petroleum fraction
Assignee: Tonen Chemical Corp
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Filing: 1987-04-22
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Granted: 1989-06-13
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Expires: 2007-04-22
Abstract
Abstract In the present invention, a petroleum fraction containing arsenic is brought into contact with an adsorbent comprising a substrate such as an active carbon, bituminous coal or organic polymeric compound having introduced therein a sulfur element, particularly represented by mercapto moiety, and therefore arsenic in the petroleum fraction can be removed at a high percent removal by means of simple equipment, and, even if highly reactive olefins are contained in the petroleum fraction, these olefins do not polymerize, thus troubles do not occur.
Inventors
- 👤 Shinichi Ichikawa
- 👤 Unkichi Yoshida
- 👤 Yoshihisa Matsushima
- 👤 Hisatake Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:47
CPC Classifications
B; B01; B01D; B01D15/00; B01J; B01J20/00; B01J20/22; B01J20/26; B01J20/30; B01J20/32; B01J20/3231; B01J20/3242; C; C10; C10G; C10G25/00; C10G25/003; G; G06; G06F; G06F40/00; G06F40/10; G06F40/12; G06F40/134
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
61 words
A process for removing arsenic in a petroleum fraction which comprises the step of contacting the petroleum fraction containing arsenic in the form of arsine or an organic arsine compound with an adsorbent comprising a substrate having a sulfur element introduced thereinto, said sulfur element being in the form of mercapto moieties, thioethers, thioaldehydes, thiocarboxylic acids, dithiocarboxylic acids, thioamides or thiocyanates.
Claim 2
Dependent Claim
61 words
A process for removing arsenic in a petroleum fraction which comprises the step of contacting the petroleum fraction containing arsenic in the form of arsine or an organic arsine compound with an adsorbent comprising a substrate having a sulfur element introduced thereinto, said sulfur element being in the form of mercapto moieties, thioethers, thioaldehydes, thiocarboxylic acids, dithiocarboxylic acids, thioamides or thiocyanates.
Claim 3
Dependent Claim
24 words
The process according to claim 1 wherein the substrate of the adsorbent is an active carbon, a bituminous coal, or an organic polymeric compound.
Claim 4
Dependent Claim
18 words
The process according to claim 1 wherein the sulfur element is introduced in the form of mercapto moieties.
Claim 5
Dependent Claim
24 words
The process according to claim 2 wherein the substrate is polystyrene, a styrene-divinylbenzene copolymer, polyvinyl chloride, a phenolic resin, cellulose or a mixture thereof.
Claim 6
Dependent Claim
19 words
A process according to claim 1 wherein the petroleum fraction to be contacted with the adsorbent contains an olefin.
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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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |