Patent US4190588A successfully refreshed from Google Patents.
US4190588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a substituted butyrolactone acetic acid
Assignee: Mobil Oil AS
•
Filing: 1975-09-30
•
Granted: 1980-02-26
•
Expires: 1995-09-30
Abstract
Abstract Metal salts and amides of alkyl-lactam acetic acids are prepared by reacting gamma-hydrocarbyl butyrolactone acetic acid compounds derived from alkenylsuccinic anhydrides with metal compounds and amines or amines alone. High molecular weight lactam acid salts and amides and metal complexes and metal carbamates thereof are useful as detergents or dispersants in organic industrial fluids. Another aspect of this invention is a method of preparing lactone acetic acids in yields up to 90% conversion from alkenylsuccinic anhydrides.
Inventors
- 👤 El-Ahmadi I. Heiba
- 👤 Albert L. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:23
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/18; C07D207/22; C07D207/24; C07D207/26; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C08; C08G; C08G73/00; C08G73/06; C08G73/0605; C08G73/0611; C08G73/10; C08G73/1092; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/224; C10L1/18; C10L1/1817; C10L1/188; C10L1/192; C10L1/198; C10L1/221; C10L1/232; C10L1/234; C10L1/238; C10L1/2383; C10L1/2387; C10M; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/10; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
The method of preparing a butyrolactone acetic acid having the structure ##STR16## wherein R is hydrogen or hydrocarbyl of 1 to about 300 carbon atoms, said method comprising the steps of (1) reacting an alkenyl succinic anhydride, wherein the first and second carbon atoms attached to the succinyl group are unbranched, with a mineral acid in the presence of water thereby forming a reaction mixture of said butyrolactone acetic acid and by-product alkenyl succinic diacid, (2) treating said reaction mixture with an inert organic solvent and distilling, thereby withdrawing said solvent, said mineral acid and water from said reaction mixture and converting said by-product alkenyl succinic diacid to anhydride, and (3) subsequently treating the mixture of said butyrolactone acetic acid and alkenyl succinic anhydride with mineral acid in the presence of water thereby increasing the butyrolactone acetic acid content of said mixture.
Claim 2
Independent Claim
142 words
The method of preparing a butyrolactone acetic acid having the structure ##STR16## wherein R is hydrogen or hydrocarbyl of 1 to about 300 carbon atoms, said method comprising the steps of (1) reacting an alkenyl succinic anhydride, wherein the first and second carbon atoms attached to the succinyl group are unbranched, with a mineral acid in the presence of water thereby forming a reaction mixture of said butyrolactone acetic acid and by-product alkenyl succinic diacid, (2) treating said reaction mixture with an inert organic solvent and distilling, thereby withdrawing said solvent, said mineral acid and water from said reaction mixture and converting said by-product alkenyl succinic diacid to anhydride, and (3) subsequently treating the mixture of said butyrolactone acetic acid and alkenyl succinic anhydride with mineral acid in the presence of water thereby increasing the butyrolactone acetic acid content of said mixture.
Claim 3
Dependent Claim
20 words
The method described in claim 1 wherein said mineral acid is hydrochloric acid and said inert organic solvent is toluene.
Claim 4
Dependent Claim
15 words
The method described in claim 1 wherein said alkenyl succinic anhydride is n-hexadecenyl succinic anhydride.
Claim 5
Dependent Claim
25 words
The method described in claim 1 wherein said steps (2) and (3) are repeated, thereby further increasing the butyrolactone acetic acid content of said mixture.
References Cited (Backward Citations)
US3155685A
Cited
US3936472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |