Patent US2809717A successfully refreshed from Google Patents.
US2809717A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating aromatic hydrocarbons from coal distillation gases
Assignee: Beazer East Inc
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Filing: 1955-11-02
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Granted: 1957-10-15
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Expires: 1975-11-02
Abstract
No abstract record available.
Inventors
- 👤 Schmalenbach Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:26
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/16; C10K1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PROCESS FOR SEPARATING AROMATIC HYDROCARBONS FROM COAL DISTILLATION GASES UNDER PRESSURE, WHICH COMPRISES COMPRISING THE COAL DISTILLATION GASES WHEREBY THE TEMPERATURE OF THE GASES IS ELEVATED, INDIRECTLY COOLING THE GASES OF ELEVATED TEMPERATURE TO NORMAL TEMPERATURE WHEREBY A CONDENSATE CONTAINING LIQUID BENZENE HYDROCARBONS, NAPHTHALENE, SOLVENT NAPTHA, AND WATER SEPARATES FROM THE COOLED GASES, SEPARATING WATER FROM SAID CONDENSATE, SRUBBING THE GASES FROM THE INDIRECT COOLING STEP IN A BENZOL SCRUBBER WITH WASH OILS, WHICH WASH OIL ABSORBS BENZENE HYDROCARBONS FROM SAID GASES, SAID GASES AFTER THE SCRUBBING IN SAID BENZOL SCRUBBER CONTAINING RESIDUAL NAPHTHALENE, AND SCRUBBING THE GASES CONTAINING RESIDUAL NAPHTHALENE FROM THE BENZOL SCRUBBER WITH THE CONDENSATE CONTAINING LIQUID BENZENE HYDROCARBONS, NAPHTHALENE, AND SOLVENT NAPTHA, SEPARATE FROM WATER WHEREBY SAID CONDENSATE DISSOLVES THE RESIDUAL NAPHTHALENE FROM SAID GASES.
Claim 2
Dependent Claim
130 words
A PROCESS FOR SEPARATING AROMATIC HYDROCARBONS FROM COAL DISTILLATION GASES UNDER PRESSURE, WHICH COMPRISES COMPRISING THE COAL DISTILLATION GASES WHEREBY THE TEMPERATURE OF THE GASES IS ELEVATED, INDIRECTLY COOLING THE GASES OF ELEVATED TEMPERATURE TO NORMAL TEMPERATURE WHEREBY A CONDENSATE CONTAINING LIQUID BENZENE HYDROCARBONS, NAPHTHALENE, SOLVENT NAPTHA, AND WATER SEPARATES FROM THE COOLED GASES, SEPARATING WATER FROM SAID CONDENSATE, SRUBBING THE GASES FROM THE INDIRECT COOLING STEP IN A BENZOL SCRUBBER WITH WASH OILS, WHICH WASH OIL ABSORBS BENZENE HYDROCARBONS FROM SAID GASES, SAID GASES AFTER THE SCRUBBING IN SAID BENZOL SCRUBBER CONTAINING RESIDUAL NAPHTHALENE, AND SCRUBBING THE GASES CONTAINING RESIDUAL NAPHTHALENE FROM THE BENZOL SCRUBBER WITH THE CONDENSATE CONTAINING LIQUID BENZENE HYDROCARBONS, NAPHTHALENE, AND SOLVENT NAPTHA, SEPARATE FROM WATER WHEREBY SAID CONDENSATE DISSOLVES THE RESIDUAL NAPHTHALENE FROM SAID GASES.
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) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |