US4552854A
Expired / Lapsed
US
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Removal of arsenic compounds from spent catecholated polymer
Assignee: United States Department of Energy
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Filing: 1985-02-08
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Granted: 1985-11-12
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Expires: 2005-02-08
Abstract
Abstract Described is a process for removing arsenic from petroliferous derived liquids by contacting said liquid at an elevated temperature with a divinylbenzene-crosslinked polystyrene having catechol ligands anchored thereon. Also, described is a process for regenerating spent catecholated polystyrene by removal of the arsenic bound to it from contacting petroliferous liquid as described above and involves: a. treating said spent catecholated polystyrene, at a temperature in the range of about 20 DEG to 100 DEG C. with an aqueous solution of at least one carbonate and/or bicarbonate of ammonium, alkali and alkaline earth metals, said solution having a pH between about 8 and 10 and, b. separating the solids and liquids from each other. Preferably the regeneration treatment is in two steps wherein step (a) is carried out with an aqueous alcoholic carbonate solution containing lower alkyl alcohol, and, steps (a) and (b) are repeated using a bicarbonate.
Inventors
- 👤 Richard H. Fish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:14
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/003; Y; Y10; Y10S; Y10S502/00; Y10S502/514; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
Process of removal of arsenic compounds which are bound to catechol ligands anchored to a polystyrene-divinylbenzene polymer thereby forming spent polymer comprising: (a) treating said arsenic-bound-to catecholated polymer with an aqueous solution of at least one carbonate or bicarbonate selected from the group consisting of ammonium, alkali and alkaline earth metals at a temperature in the range of about 20° to 100° C., at substantially atmospheric pressure; and, (b) separating the solids and liquids from each other.
Claim 2
Dependent Claim
77 words
Process of removal of arsenic compounds which are bound to catechol ligands anchored to a polystyrene-divinylbenzene polymer thereby forming spent polymer comprising: (a) treating said arsenic-bound-to catecholated polymer with an aqueous solution of at least one carbonate or bicarbonate selected from the group consisting of ammonium, alkali and alkaline earth metals at a temperature in the range of about 20° to 100° C., at substantially atmospheric pressure; and, (b) separating the solids and liquids from each other.
Claim 3
Dependent Claim
86 words
Process according to claim 1 wherein said aqueous alkaline solution in step (a) is a carbonate and includes at least one lower alkyl alcohol; and, said process also includes the additional following steps: (c) treating the solids with an aqueous solution containing at least one lower alkyl alcohol and at least one bicarbonate selected from the group consisting of ammonium, alkali and alkaline earth metal bicarbonates at a temperature in the range of about 20° to 100° C.; and, (d) separating the solids from the liquids.
Claim 4
Dependent Claim
18 words
Process according to claim 2 wherein in steps (a) and (c) said carbonate is of an alkali metal.
Claim 5
Dependent Claim
16 words
Process according to claim 2 wherein in steps (a) and (c) said carbonate is sodium carbonate.
Claim 6
Dependent Claim
26 words
Process according to claim 2 wherein the alcohol in said solution of steps (a) and (c) is at least one selected from methanol, ethanol, and propanol.
Claim 7
Dependent Claim
20 words
Process according to claim 2 wherein in step (a) the pH is in the range of about 8 to 10.
Claim 8
Dependent Claim
20 words
Process according to claim 2 wherein in step (c) the pH is in the range of about 8 to 9.
Claim 9
Dependent Claim
35 words
Process according to claim 2 wherein in step (a) the pH is in the range of about 8 to 10 and in step (c) the pH is in the range of about 8 to 9.
Claim 10
Dependent Claim
21 words
Process according to claim 2 wherein the temperature in (a) and (c) are both in the range of about 45°-65° C.
Claim 11
Dependent Claim
157 words
Process of removal of arsenic compounds which are bound to catechol ligands anchored to a polystyrene-divinyl-benzene polymer thereby forming spent polymer comprising: (a) treating said arsenic-bound to catecholated polymer with an aqueous solution of at least one lower alkyl alcohol and at least one carbonate selected from the group consisting of ammonium, alkali and alkaline earth metals having a pH in the range of about 8 to 10 at a temperature in the range of about 45° to 80° C., at substantially atmospheric pressure; (b) separating the solids and liquids from each other; (c) treating the solids with an aqueous solution containing at least one lower alkyl alcohol and at least one bicarbonate selectd from the group consisting of ammonium, alkali and alkaline earth metal bicarbonates having a pH in the range of about 8 to 9 at a temperature in the range of about 45° to 65° C.; and, (d) separating the solids from the liquids.
Claim 12
Dependent Claim
157 words
Process of removal of arsenic compounds which are bound to catechol ligands anchored to a polystyrene-divinyl-benzene polymer thereby forming spent polymer comprising: (a) treating said arsenic-bound to catecholated polymer with an aqueous solution of at least one lower alkyl alcohol and at least one carbonate selected from the group consisting of ammonium, alkali and alkaline earth metals having a pH in the range of about 8 to 10 at a temperature in the range of about 45° to 80° C., at substantially atmospheric pressure; (b) separating the solids and liquids from each other; (c) treating the solids with an aqueous solution containing at least one lower alkyl alcohol and at least one bicarbonate selectd from the group consisting of ammonium, alkali and alkaline earth metal bicarbonates having a pH in the range of about 8 to 9 at a temperature in the range of about 45° to 65° C.; and, (d) separating the solids from the liquids.
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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) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |