Patent US4159241A successfully refreshed from Google Patents.
US4159241A
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Process for removing arsenic and/or antimony from oil shale distillate or coal oil
Assignee: GEA Group AG
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Filing: 1977-09-26
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Granted: 1979-06-26
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Expires: 1997-09-26
Abstract
Abstract An improvement in a process of removing arsenic and/or antimony from their chemical compounds in a substantially organic liquid by treating the latter with hydrogen under a superatmospheric pressure and at an elevated temperature, the improvement residing in applying this process to the liquid distillate of oil shale or coal or one derived from the gasification of coal, said liquid containing oil shale dust or coal dust whereby elementary arsenic and/or antimony is deposited on said oil shale dust or said coal dust and said oil shale dust or said coal dust containing elementary arsenic and/or antimony is removed therefrom.
Inventors
- 👤 Thomas Simo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:24
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; C10G45/00; C10G45/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A process for removing a metal selected from the group consisting of arsenic, antimony and mixtures thereof from an oil shale distillate containing shale dust or a coal oil distillate containing coal dust which consists essentially of contacting said oil shale distillate or said coal oil distillate with hydrogen under a pressure of 60 to 160 bars at a temperature of 300° to 500° C. and at a residence time of about 15 minutes and rapidly cooling the so-treated distillate whereby elementary arsenic, antimony or mixture thereof is deposited on said oil shale dust or said coal dust and said oil shale dust or said coal dust containing elementary arsenic, antimony or mixture thereof is removed therefrom, the residual arsenic content of the oil phase remaining being less than 1 ppm and such oil phase being obtained without any carbon loss.
Claim 2
Dependent Claim
141 words
A process for removing a metal selected from the group consisting of arsenic, antimony and mixtures thereof from an oil shale distillate containing shale dust or a coal oil distillate containing coal dust which consists essentially of contacting said oil shale distillate or said coal oil distillate with hydrogen under a pressure of 60 to 160 bars at a temperature of 300° to 500° C. and at a residence time of about 15 minutes and rapidly cooling the so-treated distillate whereby elementary arsenic, antimony or mixture thereof is deposited on said oil shale dust or said coal dust and said oil shale dust or said coal dust containing elementary arsenic, antimony or mixture thereof is removed therefrom, the residual arsenic content of the oil phase remaining being less than 1 ppm and such oil phase being obtained without any carbon loss.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein the substantially organic liquid which is treated contains arsenic.
Claim 4
Dependent Claim
16 words
A process according to claim 1 wherein the substantially organic liquid which is treated contains antimony.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-25 | 1982-12-25 | 1983-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-25 | 1986-12-25 | 1987-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-25 | 1990-12-25 | 1991-06-26 | $7700.00 | Window Closed / Lapsed |