US2901407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen chloride purification
Assignee: Scientific Design LLC
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Filing: 1957-07-31
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Granted: 1959-08-25
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Expires: 1977-07-31
Abstract
No abstract record available.
Inventors
- 👤 Colton John White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:03
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN A CYCLIC PROCESS FOR THE PURIFICATION OF A CONTAMINATED AQUEOUS HYDROCHLORIC ACID SOLUTION, THE STEPS OF: PASSING SAID AQUEOUS SOLUTION INTO A FIRST SEPARATION ZONE, REMOVING FROM SAID SEPARATION ZONE AS SEPARATE STREAMS HYDROGEN CHLORIDE CONTAINING SAID CONTAMINANTS AND AN AQUEOUS HYDROCHLORIC ACID EFFLUENT MORE CONCENTRATED WITH RESPECT TO HYDROGEN CHLORIDE THAN SAID ORIGINAL CONTAMINATED AQUEOUS HYDROCHLORIC ACID SOLUTION, PASSING SAID EFFLUENT INTO A SECOND SEPARTATION ZONE MAINTAINED AT A PRESSURE HIGHER THAN THAT MAINTAINED IN SAID FIRST SEPARATION ZONE, REMOVING FROM SAID SECOND SEPARATION ZONE AS SEPARATE STREAMS AN AQUEOUS HYDROCHLORIC ACID SOLUTION OF AZEOTROPIC CONCENTRATION AND A VAPOR EFFLUENT OF HYDROGEN CHLORIDE AND WATER, INTRODUCING A PORTION OF SAID VAPOR EFFLUENT INTO SAID FIRST SEPARATION ZONE SUFFICIENT TO EFFECT SAID SEPARATION IN SAID FIRST ZONE, SEPARATING THE REMAINING PORTION OF SAID VAPOR EFFLUENT INTO ANHYDROUS HYDROGEN CHLORIDE AND AQUEOUS HYDROCHLORIC ACID SOLUTION.
Claim 2
Dependent Claim
145 words
IN A CYCLIC PROCESS FOR THE PURIFICATION OF A CONTAMINATED AQUEOUS HYDROCHLORIC ACID SOLUTION, THE STEPS OF: PASSING SAID AQUEOUS SOLUTION INTO A FIRST SEPARATION ZONE, REMOVING FROM SAID SEPARATION ZONE AS SEPARATE STREAMS HYDROGEN CHLORIDE CONTAINING SAID CONTAMINANTS AND AN AQUEOUS HYDROCHLORIC ACID EFFLUENT MORE CONCENTRATED WITH RESPECT TO HYDROGEN CHLORIDE THAN SAID ORIGINAL CONTAMINATED AQUEOUS HYDROCHLORIC ACID SOLUTION, PASSING SAID EFFLUENT INTO A SECOND SEPARTATION ZONE MAINTAINED AT A PRESSURE HIGHER THAN THAT MAINTAINED IN SAID FIRST SEPARATION ZONE, REMOVING FROM SAID SECOND SEPARATION ZONE AS SEPARATE STREAMS AN AQUEOUS HYDROCHLORIC ACID SOLUTION OF AZEOTROPIC CONCENTRATION AND A VAPOR EFFLUENT OF HYDROGEN CHLORIDE AND WATER, INTRODUCING A PORTION OF SAID VAPOR EFFLUENT INTO SAID FIRST SEPARATION ZONE SUFFICIENT TO EFFECT SAID SEPARATION IN SAID FIRST ZONE, SEPARATING THE REMAINING PORTION OF SAID VAPOR EFFLUENT INTO ANHYDROUS HYDROGEN CHLORIDE AND AQUEOUS HYDROCHLORIC ACID SOLUTION.
References Cited (Backward Citations)
US2366361A
Cited
US2730194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |