US3974220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium corrosion inhibitor and petroleum demulsifier
Assignee: Hoechst AG
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Filing: 1973-08-06
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Granted: 1976-08-10
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Expires: 1993-08-06
Abstract
Abstract Compounds of the formula (C2H4O)x-(C3H6O)y-(C2H4O)zH ¦ A(<->) ¦ R1-CH2-N(<+>)---CH2---R2---CH2--- ¦ ¦ ¦ (C2H4O)x-(C3H6O)y-(C2H4O)zH (C2H4O)x-(C3H6O)y-(C2H4O)zH ¦ A(<->) (I) ¦ N(<+>)---CH2-----R3----H ¦ ¦ ¦ (C2H4O)x-(C3H6O)y-(C2H4O)zHn IN WHICH R1 is alkyl, alkenyl, or alkylpheyl, R2 is a bivalent aromatic radical, and R3 is an alkylene, alkenylene, or alkylphenylene radical and A(<->) stands for a halogen atom, are used as demulsifiers and corrosion inhibiting agents in crude oil refining.
Inventors
- 👤 Lorenz Heiss
- 👤 Martin Hille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:20
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
57 words
A compound of the formula ##SPC5## in which x is 1 or 2, y is zero to 8, z is 2 to 10, the sum of x plus z being equal to or greater than y, R 1 and R 3 each are alkyl or alkenyl of 5 to 24 carbons and A.sup.( - ) is halogen.
Claim 2
Dependent Claim
57 words
A compound of the formula ##SPC5## in which x is 1 or 2, y is zero to 8, z is 2 to 10, the sum of x plus z being equal to or greater than y, R 1 and R 3 each are alkyl or alkenyl of 5 to 24 carbons and A.sup.( - ) is halogen.
Claim 3
Dependent Claim
17 words
A compound of claim 1 wherein A.sup.( - ) is Cl.sup.( - ) or Br.sup.( - ).
Claim 4
Dependent Claim
15 words
The compound of the formula ##SPC6## wherein --CH 2 --R 1 means the octadecene-(8)-yl radical.
Claim 5
Dependent Claim
15 words
The compound of the formula ##SPC6## wherein --CH 2 --R 1 means the octadecene-(8)-yl radical.
Claim 6
Dependent Claim
21 words
A compound of the formula ##SPC7## wherein --CH 2 --R 1 means an alkyl radical having 20 to 22 carbon atoms.
Claim 7
Dependent Claim
21 words
A compound of the formula ##SPC7## wherein --CH 2 --R 1 means an alkyl radical having 20 to 22 carbon atoms.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |