US3337740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating acrylic acid from impurities
Assignee: Deering Milliken Research Corp
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Filing: 1962-02-13
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Granted: 1967-08-22
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Expires: 1982-02-13
Abstract
No abstract record available.
Inventors
- 👤 Michael H Gray
- 👤 Jr Edward C Horton
- 👤 Jr Hay F Sparks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:53
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48; Y; Y10; Y10S; Y10S203/00; Y10S203/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A PROCESS FOR SEPARATING ACRYLIC ACID FROM A SYSTEM INCLUDING A MIXTURE OF ACRYLIC ACID AND IMPURITIES COMPRISING: (A) DISSOLVING AT LEAST A SUBSTANTIAL PROPORTION OF THE ACRYLIC ACID IN AN ORGANIC SOLVENT THEREFOR, SAID SOLVENT BEING CHARACTERIZED BY ITS IMMISCIBILITY IN WATER AND BY A BOILING POINT BETWEEN ABOUT 260* AND ABOUT 350%F.; (B) ADDING WATER TO THE MIXTURE; (C) CO-DISTILLING THE ACRYLIC ACID-SOLVENT-WATER FROM THE MIXTURE; AND (D) SEPARATING THE AQUEOUS ACRYLIC ACID FROM THE CONDENSATE.
Claim 2
Dependent Claim
78 words
A PROCESS FOR SEPARATING ACRYLIC ACID FROM A SYSTEM INCLUDING A MIXTURE OF ACRYLIC ACID AND IMPURITIES COMPRISING: (A) DISSOLVING AT LEAST A SUBSTANTIAL PROPORTION OF THE ACRYLIC ACID IN AN ORGANIC SOLVENT THEREFOR, SAID SOLVENT BEING CHARACTERIZED BY ITS IMMISCIBILITY IN WATER AND BY A BOILING POINT BETWEEN ABOUT 260* AND ABOUT 350%F.; (B) ADDING WATER TO THE MIXTURE; (C) CO-DISTILLING THE ACRYLIC ACID-SOLVENT-WATER FROM THE MIXTURE; AND (D) SEPARATING THE AQUEOUS ACRYLIC ACID FROM THE CONDENSATE.
Claim 3
Dependent Claim
77 words
A PROCESS FOR SEPARATING ACRYLIC ACID FROM A SYSTEM INCLUDING A MIXTURE OF ACRYLIC ACID AND IMPURITIES COMPRISING: (A) DISSOLVING AT LEAST A SUBSTANTIAL PROPORTION OF THE ACRYLIC ACID IN AN ORGANIC SOLVENT THEREFOR, SAID SOLVENT BEING CHARACTERIZED BY ITS IMMISCIBILITY IN WATER AND BY A BOILING POINT BETWEEN ABOUT 260* AND ABOUT 350*F.; (B) CO-DISTILLING THE ACRYLIC ACID-SOLVENT FROM THE MIXTURE; (C) ADDING WATER TO THE CONDENSATE; AND (D) SEPARATING AQUEOUS ACRYLIC ACID FROM THE CONDENSATE.
Claim 4
Dependent Claim
77 words
A PROCESS FOR SEPARATING ACRYLIC ACID FROM A SYSTEM INCLUDING A MIXTURE OF ACRYLIC ACID AND IMPURITIES COMPRISING: (A) DISSOLVING AT LEAST A SUBSTANTIAL PROPORTION OF THE ACRYLIC ACID IN AN ORGANIC SOLVENT THEREFOR, SAID SOLVENT BEING CHARACTERIZED BY ITS IMMISCIBILITY IN WATER AND BY A BOILING POINT BETWEEN ABOUT 260* AND ABOUT 350*F.; (B) CO-DISTILLING THE ACRYLIC ACID-SOLVENT FROM THE MIXTURE; (C) ADDING WATER TO THE CONDENSATE; AND (D) SEPARATING AQUEOUS ACRYLIC ACID FROM THE CONDENSATE.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |