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US4451631A
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Agent and method for deoiling sand and rock masses
Assignee: Sanofi Aventis Deutschland GmbH
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Filing: 1982-09-23
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Granted: 1984-05-29
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Expires: 2002-09-23
Abstract
Abstract Sand or rock masses containing mineral oil are deoiled with a deoiling agent containing an aqueous solution of a water-soluble copolymer which is a random distribution of 5 to 60% of weight of units of the formula ##STR1## 2 to 40% by weight of units of the formula ##STR2## and 38 to 93% by weight of units of the formula ##STR3## and partial hydrolysates thereof, wherein when R 1 is hydrogen, R 2 is hydrogen, methyl or ethyl, Y is --CO--NH--C(CH 3 ) 2 --CH 2 -- or a direct bond, and X.sup.⊕ is a cation; when R 1 and R 2 are identical or different, each is hydrogen, methyl, ethyl or, together are trimethylene, Y is --CO--NH--C(CH 3 ) 2 --CH 2 -- and X.sup.⊕ is cation.
Inventors
- 👤 Friedrich Engelhardt
- 👤 Hermann Schmitz
- 👤 Walter Gulden
- 👤 Jorg Hax
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:24
CPC Classifications
C; C10; C10G; C10G1/00; C08; C08F; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C08F220/56; C08F220/58; C08F220/585; C08F226/00; C08F226/02; C09; C09K; C09K8/00; C09K8/58; C09K8/588; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
Clay-free agent for deoiling sand or rock masses containing mineral oil which comprises an aqueous solution of 20 to 5,000 ppm of a water-soluble copolymer consisting essentially of a random distribution of 5 to 60% by weight of units of the formula ##STR35## 2to 40% by weight of units of the formula ##STR36## and 38 to 93% by weight of units of the formula ##STR37## and hydrolysates thereof wherein R 1 and R 2 are identical or different and each is hydrogen, methyl, ethyl, or together are trimethylene; Y is --CO--NH--C(CH 3 ) 2 --CH 2 -- or a direct bond; and X.sup.⊕ is a cation.
Claim 2
Dependent Claim
106 words
Clay-free agent for deoiling sand or rock masses containing mineral oil which comprises an aqueous solution of 20 to 5,000 ppm of a water-soluble copolymer consisting essentially of a random distribution of 5 to 60% by weight of units of the formula ##STR35## 2to 40% by weight of units of the formula ##STR36## and 38 to 93% by weight of units of the formula ##STR37## and hydrolysates thereof wherein R 1 and R 2 are identical or different and each is hydrogen, methyl, ethyl, or together are trimethylene; Y is --CO--NH--C(CH 3 ) 2 --CH 2 -- or a direct bond; and X.sup.⊕ is a cation.
Claim 3
Dependent Claim
54 words
The agent according to claim 1 wherein said water-soluble copolymer consists essentially of a random distribution of 5 to 50% by weight of units of the formula ##STR38## 2to 20% by weight of units of the formula ##STR39## and 45 to 90% by weight of units of the formula ##STR40## and partial hydrolysates thereof.
Claim 4
Dependent Claim
30 words
The agent according to claim 1 or claim 2 wherein said water-soluble copolymer has up to 60% of the units of the formula ##STR41## as hydrolysates of the formula ##STR42##
Claim 5
Dependent Claim
25 words
The agent according to claim 3 wherein said water-soluble copolymer contains a total of 20 to 60% by weight of units of the formula ##STR43##
Claim 6
Dependent Claim
35 words
The agent according to claim 1 wherein said copolymer contains borate anions in an amount of 2.5 to 35% by weight, calculated as H 3 BO 3 and relative to the weight of the copolymer.
Claim 7
Dependent Claim
116 words
In the process for deoiling sand or rock masses containing mineral oil by contacting said masses with an aqueous deoiling agent, the improvement comprises said deoiling agent containing an aqueous solution of a water-soluble copolymer consisting essentially of a random distribution of 5 to 60% by weight of units of the formula ##STR44## 2to 40% by weight of units of the formula ##STR45## and 38 to 93% by weight of units of the formula ##STR46## and hydrolysates thereof wherein R 1 and R 2 are identical or different and each is hydrogen, methyl, ethyl, or together are trimethylene; Y is --CO--NH--C(CH 3 ) 2 --CH 2 -- or a direct bond; and X.sup.⊕ is a cation.
Claim 8
Dependent Claim
116 words
In the process for deoiling sand or rock masses containing mineral oil by contacting said masses with an aqueous deoiling agent, the improvement comprises said deoiling agent containing an aqueous solution of a water-soluble copolymer consisting essentially of a random distribution of 5 to 60% by weight of units of the formula ##STR44## 2to 40% by weight of units of the formula ##STR45## and 38 to 93% by weight of units of the formula ##STR46## and hydrolysates thereof wherein R 1 and R 2 are identical or different and each is hydrogen, methyl, ethyl, or together are trimethylene; Y is --CO--NH--C(CH 3 ) 2 --CH 2 -- or a direct bond; and X.sup.⊕ is a cation.
Claim 9
Dependent Claim
54 words
The process according to claim 6 wherein said water-soluble copolymer consists essentially of a random distribution of 5 to 50% by weight of units of the formula ##STR47## 2to 20% by weight of units of the formula ##STR48## and 45 to 90% by weight of units of the formula ##STR49## and partial hydrolysates thereof.
Claim 10
Dependent Claim
30 words
The process according to claim 7 or claim 6 wherein said water-soluble copolymer has up to 60% of the units of the formula ##STR50## as hydrolysates of the formula ##STR51##
Claim 11
Dependent Claim
19 words
The process according to claim 7 wherein the sand and rock masses which are deoiled occur in petroleum deposits.
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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |