Patent US2917538A successfully refreshed from Google Patents.
US2917538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of acrylic acid esters
Assignee: Dow Chemical Co
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Filing: 1957-12-19
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Granted: 1959-12-15
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Expires: 1977-12-19
Abstract
No abstract record available.
Inventors
- 👤 Robert L Carlyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:23
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54; C07C67/00; C07C67/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS COMPRISING: (A) INTRODUCING INTO A REACTION ZONE AN ACRYLIC ACID, AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF MONOHYDRIC ALIPHATIC PRIMARY AND SECONDARY ALCOHOLS HAVING FROM 5 TO 18 CARBON ATOMS, INCLUSIVE, AN ACID ESTERIFICATION CATALYST AND A POLYMERIZATION INHIBITOR, WHILE (B) SIMULTANEOUSLY INTRODUCING INTO SAID REACTION ZONE IN A COUNTERCURRENT MANNER A VAPORIZED INERT DILUENT HAVING A BOILING POINT BETWEEN ABOUT 80* AND ABOUT 135* C. AND WHICH FORMS AN AZEOTROPE WITH WATER, (C) MAINTAINING THE REACTION ZONE AT A TEMPERATURE OF BETWEEN ABOUT 80* AND ABOUT 135*C. THEREBY TO CAUSE A REACTION TO OCCUR BETWEEN SAID ACID AND SAID ALCOHOL; (D) CONTINUOUSLY WITHDRAWING FROM SAID REACTION ZONE AS FORMED THE DILUENT-WATER AZEOTROPE, AND (E) SIMULTANEOUSLY CONTINUOUSLY WITHDRAWING FROM SAID REACTION ZONE AS FORMED THE APPROPRIATE ESTER IN THE LIQUID FORM.
Claim 2
Dependent Claim
134 words
A PROCESS COMPRISING: (A) INTRODUCING INTO A REACTION ZONE AN ACRYLIC ACID, AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF MONOHYDRIC ALIPHATIC PRIMARY AND SECONDARY ALCOHOLS HAVING FROM 5 TO 18 CARBON ATOMS, INCLUSIVE, AN ACID ESTERIFICATION CATALYST AND A POLYMERIZATION INHIBITOR, WHILE (B) SIMULTANEOUSLY INTRODUCING INTO SAID REACTION ZONE IN A COUNTERCURRENT MANNER A VAPORIZED INERT DILUENT HAVING A BOILING POINT BETWEEN ABOUT 80* AND ABOUT 135* C. AND WHICH FORMS AN AZEOTROPE WITH WATER, (C) MAINTAINING THE REACTION ZONE AT A TEMPERATURE OF BETWEEN ABOUT 80* AND ABOUT 135*C. THEREBY TO CAUSE A REACTION TO OCCUR BETWEEN SAID ACID AND SAID ALCOHOL; (D) CONTINUOUSLY WITHDRAWING FROM SAID REACTION ZONE AS FORMED THE DILUENT-WATER AZEOTROPE, AND (E) SIMULTANEOUSLY CONTINUOUSLY WITHDRAWING FROM SAID REACTION ZONE AS FORMED THE APPROPRIATE ESTER IN THE LIQUID FORM.
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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |