Patent US4517114A successfully refreshed from Google Patents.
US4517114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibitors against corrosion caused by CO2 and H2 S in water-in-oil emulsions
Assignee: BASF SE
•
Filing: 1983-08-26
•
Granted: 1985-05-14
•
Expires: 2003-08-26
Abstract
Abstract The subject invention relates to compositions which inhibit the corrosion caused by CO 2 and H 2 S in the transport and storage of crude oils, which are generally water-in-oil, in particular salt-water-in-oil emulsions. The corrosion inhibitors are mixtures of certain imidazoline or tetrahydropyrimidine derivatives, precursors thereof, or their complexes with sulfur and certain maleinamidic acids.
Inventors
- 👤 Knut Oppenlaender
- 👤 Karl Stork
- 👤 Klaus Barthold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:14
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/54; C10; C10M; C10M133/00; C10M133/02; C10M133/16; C10M133/38; C10M133/40; C10M133/44; C10M133/46; C10M137/00; C10M137/02; C10M137/04; C10M137/08; C10M141/00; C10M141/10; C10M173/00; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C10M2201/00; C10M2201/02; C10M2215/00; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/12; C10M2215/122; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/043; C10N; C10N2030/00; C10N2030/12; C10N2050/00; C10N2050/01; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
An inhibitor against corrosion caused by CO 2 and H 2 S in water-in-oil emulsions comprising a mixture of (A) a compound selected from the group consisting of (i) a compound or salt thereof having the formula ##STR13## (ii) a precursor of (i) having the formula ##STR14## in which R 1 =C 6 to C 22 alkyl or alkenyl; X=--OH, --NH 2 or ##STR15## R 2 =C 4 to C 18 alkyl, n=2 or 3; and (B) a maleinamidic acid having the formula ##STR16## in which R 3 is a saturated or unsaturated C 8 to C 22 alkyl, wherein the ratio of A:B is from 1:4 to 4:1.
Claim 2
Dependent Claim
109 words
An inhibitor against corrosion caused by CO 2 and H 2 S in water-in-oil emulsions comprising a mixture of (A) a compound selected from the group consisting of (i) a compound or salt thereof having the formula ##STR13## (ii) a precursor of (i) having the formula ##STR14## in which R 1 =C 6 to C 22 alkyl or alkenyl; X=--OH, --NH 2 or ##STR15## R 2 =C 4 to C 18 alkyl, n=2 or 3; and (B) a maleinamidic acid having the formula ##STR16## in which R 3 is a saturated or unsaturated C 8 to C 22 alkyl, wherein the ratio of A:B is from 1:4 to 4:1.
Claim 3
Dependent Claim
32 words
The inhibitor of claim 1 wherein component A is selected from the group consisting of ##STR17## wherein n is 2 or 3, as well as the corresponding C 17 H 35 analogues.
Claim 4
Dependent Claim
14 words
The inhibitor of claim 2 wherein component B is the monoisotridecylamide of maleic acid.
Claim 5
Dependent Claim
26 words
The inhibitors of claim 1 where component A is reacted with elementary sulfur at 100° C. to 200° C. in a ratio of 100:1 to 2:1.
References Cited (Backward Citations)
CA628235A
Cited
US2944969A
Cited
GB896375A
Cited
US3674804A
Cited
US3687847A
Cited
US3891470A
Cited
US4101441A
Cited
GB2010237A
Cited
US4436639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |