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—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-03 17:53
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
47 words
Process for removing arsenic contaminants from petroliferous liquids by contacting said liquid at a temperature of about 20° C. to about 140° C., with a polystyrene-divinylbenzene polymer crosslinked with up to about 20% divinylbenzene and which polymer contains up to about 30% by weight of catechol ligands.
Claim 2
Dependent Claim
47 words
Process for removing arsenic contaminants from petroliferous liquids by contacting said liquid at a temperature of about 20° C. to about 140° C., with a polystyrene-divinylbenzene polymer crosslinked with up to about 20% divinylbenzene and which polymer contains up to about 30% by weight of catechol ligands.
Claim 3
Dependent Claim
19 words
Process according to claim 1 wherein said elevated temperature is in the range of about 35° to 140° C.
Claim 4
Dependent Claim
11 words
Process according to claim 1 wherein the pressure is about atmospheric.
Claim 5
Dependent Claim
16 words
Process according to claim 1 wherein the temperature is in the range of about 60°-80° C.
Claim 6
Dependent Claim
21 words
Process according to claim 1 wherein said catecholated polymer contains about 2 to 10% of catechol ligands anchored to said polymer.
Claim 7
Dependent Claim
12 words
Process according to claim 1 wherein said petroliferous liquid is shale oil.
Claim 8
Dependent Claim
12 words
Process according to claim 1 wherein said petroliferous liquid is heavy petroleum.