US4600516A
Expired / Lapsed
US
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Sulfonated tributylphenol ethoxylates, their use, and a process for preparing sulfonated alkoxylates
Assignee: Hoechst AG
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Filing: 1984-02-15
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Granted: 1986-07-15
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Expires: 2004-02-15
Abstract
Abstract Sulfonated tributylphenol ethoxylates of the formula ##STR1## where x denotes a number from 2 to 20, and M denotes a cation, their use as surfactants, in particular as auxiliaries in the tertiary production of crude oil, and an improved, general process for preparing sulfonated alkyl and (alkyl)aryl polyalkoxylates by reacting halides of alkyl and (alkyl)aryl polyethoxylates with alkali metal sulfite by carrying out the reaction in the presence of lower alcohols, polyols, monoethylene glycol, polyethylene glycol or alkyl ethers thereof, as solubilizing agents.
Inventors
- 👤 Norbert Wester
- 👤 Klaus Uhl
- 👤 Walter Gulden
- 👤 Gerhart Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:03
CPC Classifications
C; C07; C07C; C07C309/00; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/321; C08G65/326; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A process for preparing sulfonated alkoxylates of the formula R--(O--A).sub.n --SO.sub.3 M in which R denotes C 8 -C 22 -alkyl or phenyl or naphthyl, both of which can be substituted by 1 to 3 C 1 -C 15 -alkyl, A denotes an ethylene or an isopropylene group, n denotes a number from 3 to 30 and M denotes sodium or potassium, which comprises reacting a compound of the formula R--(O--A).sub.n --Hal in which Hal denotes a halogen atom, in aqueous solution with sodium sulfite or potassium sulfite in the presence of monoethylene, diethylene or triethylene glycol.
Claim 2
Dependent Claim
97 words
A process for preparing sulfonated alkoxylates of the formula R--(O--A).sub.n --SO.sub.3 M in which R denotes C 8 -C 22 -alkyl or phenyl or naphthyl, both of which can be substituted by 1 to 3 C 1 -C 15 -alkyl, A denotes an ethylene or an isopropylene group, n denotes a number from 3 to 30 and M denotes sodium or potassium, which comprises reacting a compound of the formula R--(O--A).sub.n --Hal in which Hal denotes a halogen atom, in aqueous solution with sodium sulfite or potassium sulfite in the presence of monoethylene, diethylene or triethylene glycol.
Claim 3
Dependent Claim
65 words
The process as claimed in claim 1, wherein the sulfonated alkoxylates prepared have the formula R--(O--A).sub.n --SO.sub.3 M in which R is C 12 -C 18 -alkyl or phenyl or naphthyl, both of which can be substituted by 1 to 3 C 4 -C 12 -alkyl, A denotes an ethylene group, n denotes a number from 6 to 20, and M denotes sodium or potassium.
Claim 4
Dependent Claim
30 words
The process as claimed in claim 1, wherein the reaction is carried out at a starting pH of 10-11 in the presence of substitution catalysis, such as NaI or KI.
Claim 5
Dependent Claim
36 words
A sulfonated tributylphenol ethoxylate of the formula ##STR33## where x denotes a number from 2 to 20, and M denotes Na + , K + , NH 4 + or the cation of an amine base.
Claim 6
Dependent Claim
36 words
A sulfonated tributylphenol ethoxylate of the formula ##STR33## where x denotes a number from 2 to 20, and M denotes Na + , K + , NH 4 + or the cation of an amine base.
Claim 7
Dependent Claim
18 words
A sulfonated tributylphenol ethoxylate as claimed in claim 4, wherein x is a number from 6 to 20.
Claim 8
Dependent Claim
34 words
A method for increasing oil yield in the tertiary production of crude oil by stimulating the oil well and fracturing the crude oil deposits with a composition comprising a compound according to claim 4.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |