Patent US4614593A successfully refreshed from Google Patents.
US4614593A
Expired / Lapsed
US
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Demulsification of oil-in-water emulsions
Assignee: Ethyl Corp
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Filing: 1985-09-12
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Granted: 1986-09-30
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Expires: 2005-09-12
Abstract
Abstract A water-soluble polymer of monoallylamine is used as a demulsifying agent for breaking oil-in-water emulsions. This enables rapid and efficient separation between the aqueous phase and the liquid organic phase by a variety of conventional physical techniques such as settling and decantation, centrifugation, and the like.
Inventors
- 👤 David N. Roark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:11
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
71 words
A process of demulsifying an oil-in-water emulsion which comprises admixing with the emulsion a water-soluble polymer of monoallylamine that causes formation of and separation between an oil phase and an aqueous phase to occur, wherein said emulsion has a pH in the range of about 5 to about 10 and said polymer has a weight average molecular weight of at least 1000 and contains at least 95% by weight of monoallylamine.
Claim 2
Dependent Claim
71 words
A process of demulsifying an oil-in-water emulsion which comprises admixing with the emulsion a water-soluble polymer of monoallylamine that causes formation of and separation between an oil phase and an aqueous phase to occur, wherein said emulsion has a pH in the range of about 5 to about 10 and said polymer has a weight average molecular weight of at least 1000 and contains at least 95% by weight of monoallylamine.
Claim 3
Dependent Claim
17 words
A process of claim 1 in which the water-soluble polymer is an acid salt of said polymer.
Claim 4
Dependent Claim
13 words
A process of claim 1 in which the water-soluble polymer is poly(monoallylammonium chloride).
Claim 5
Dependent Claim
12 words
A process of claim 1 in which the water-soluble polymer is poly(monoallylamine).
Claim 6
Dependent Claim
13 words
A process of claim 1 in which the water-soluble polymer is a homopolymer.
Claim 7
Dependent Claim
13 words
A process of claim 1 in which the water-soluble polymer is a copolymer.
Claim 8
Dependent Claim
14 words
A process of claim 1 in which the water-soluble polymer is a crosslinked polymer.
Claim 9
Dependent Claim
30 words
A process of claim 1 in which the water-soluble polymer is a monoallylamine hydrochloride polymer having a weight average molecular weight in the range of about 5,000 to about 500,000.
Claim 10
Dependent Claim
52 words
A process of claim 1 in which the water-soluble polymer is represented by the formula: ##STR2## where m is a number from zero to about 100,000 and n is a number from zero to about 100,000, the sum of m plus n being in the range of about 10 to about 100,000.
Claim 11
Dependent Claim
14 words
A process of claim 9 in which the water-soluble polymer is a crosslinked polymer.
Claim 12
Dependent Claim
91 words
A process of removing organic matter from an aqueous medium containing emulsified liquid oleagenous matter as the disperse phase which comprises intermixing with the aqueous medium an amount of a water-soluble polymer of monoallylamine that causes demulsification in the aqueous medium, wherein said aqueous medium has a pH in the range of about 5 to about 10 and said polymer has a weight average molecular weight of at least 1000 and contains at least 95% by weight of monoallylamine, and physically separating the resultant aqueous phase and the demulsified organic phase.
Claim 13
Dependent Claim
91 words
A process of removing organic matter from an aqueous medium containing emulsified liquid oleagenous matter as the disperse phase which comprises intermixing with the aqueous medium an amount of a water-soluble polymer of monoallylamine that causes demulsification in the aqueous medium, wherein said aqueous medium has a pH in the range of about 5 to about 10 and said polymer has a weight average molecular weight of at least 1000 and contains at least 95% by weight of monoallylamine, and physically separating the resultant aqueous phase and the demulsified organic phase.
Claim 14
Dependent Claim
17 words
A process of claim 11 in which the water-soluble polymer is an acid salt of said polymer.
Claim 15
Dependent Claim
13 words
A process of claim 11 in which the water-soluble polymer is poly(monoallylammonium chloride).
Claim 16
Dependent Claim
12 words
A process of claim 11 in which the water-soluble polymer is poly(monoallylamine).
Claim 17
Dependent Claim
13 words
A process of claim 11 in which the water-soluble polymer is a homopolymer.
Claim 18
Dependent Claim
13 words
A process of claim 11 in which the water-soluble polymer is a copolymer.
Claim 19
Dependent Claim
14 words
A process of claim 11 in which the water-soluble polymer is a crosslinked polymer.
Claim 20
Dependent Claim
24 words
A process of claim 11 in which the water-soluble polymer is a monoallylamine hydrochloride polymer having a weight average molecular weight of about 60,000.
Claim 21
Dependent Claim
52 words
A process of claim 11 in which the water-soluble polymer is represented by the formula: ##STR3## where m is a number from zero to about 100,000 and n is a number from zero to about 100,000, the sum of m plus n being in the range of about 10 to about 100,000.
Claim 22
Dependent Claim
26 words
A process of claim 19 in which said water-soluble polymer is crosslinked with a crosslinking agent having two or more groups reactable with the amino group.
Claim 23
Dependent Claim
56 words
A process of claim 11 in which the amount of said polymer intermixed with the aqueous medium is within the range of from about 50 to about 2,500 parts per million parts of the aqueous medium, and in which the polymer has a weight average molecular weight in the range of about 1,000 to about 500,000.
Claim 24
Dependent Claim
16 words
A process of claim 21 in which said weight average molecular weight is at least 5,000.
Claim 25
Dependent Claim
22 words
A process of claim 21 in which said weight average molecular weight is in the range of about 10,000 to about 200,000.
Claim 26
Dependent Claim
81 words
A process of breaking an emulsion composed of a discontinuous organic phase and a continuous aqueous phase which process comprises admixing with said emulsion a water-soluble polymer of monoallylamine that causes demulsification and separation of said organic phase from said continuous phase to occur, wherein said emulsion has a pH in the range of about 5 to about 10 and said polymer has a weight average molecular weight of at least 1000 and contains at least 95% by weight of monoallylamine.
Claim 27
Dependent Claim
81 words
A process of breaking an emulsion composed of a discontinuous organic phase and a continuous aqueous phase which process comprises admixing with said emulsion a water-soluble polymer of monoallylamine that causes demulsification and separation of said organic phase from said continuous phase to occur, wherein said emulsion has a pH in the range of about 5 to about 10 and said polymer has a weight average molecular weight of at least 1000 and contains at least 95% by weight of monoallylamine.
Claim 28
Dependent Claim
52 words
A process of claim 24 in which the water-soluble polymer is represented by the formula: ##STR4## where m is a number from zero to about 100,000 and n is a number from zero to about 100,000, the sum of m plus n being in the range of about 10 to about 100,000.
Claim 29
Dependent Claim
26 words
A process of claim 25 in which said water-soluble polymer is crosslinked with a crosslinking agent having two or more groups reactable with the amino group.
Claim 30
Dependent Claim
56 words
A process of claim 24 in which the amount of said polymer intermixed with the aqueous medium is within the range of from about 50 to about 2,500 parts per million parts of the aqueous medium, and in which the polymer has a weight average molecular weight in the range of about 1,000 to about 500,000.
Claim 31
Dependent Claim
16 words
A process of claim 27 in which said weight average molecular weight is at least 5,000.
Claim 32
Dependent Claim
22 words
A process of claim 27 in which said weight average molecular weight is in the range of about 10,000 to about 200,000.
Claim 33
Dependent Claim
14 words
A process of claim 27 in which the water-soluble polymer used is poly(monoallylammonium chloride).
Claim 34
Dependent Claim
85 words
A process for demulsifying an oil-in-water emulsion which comprises admixing with an oil-in-water emulsion having a pH in the range of about 5 to about 10 a water-soluble polymer of monoallylamine having a weight average molecular weight of about 1,000 to about 500,000 and containing at least 95% by weight of monoallylamine, and in an amount that causes, formation of and separation between an oil phase and an aqueous phase to occur, and then effecting a separation between said oil phase and said aqueous phase.
Claim 35
Dependent Claim
85 words
A process for demulsifying an oil-in-water emulsion which comprises admixing with an oil-in-water emulsion having a pH in the range of about 5 to about 10 a water-soluble polymer of monoallylamine having a weight average molecular weight of about 1,000 to about 500,000 and containing at least 95% by weight of monoallylamine, and in an amount that causes, formation of and separation between an oil phase and an aqueous phase to occur, and then effecting a separation between said oil phase and said aqueous phase.
Claim 36
Dependent Claim
31 words
A process of claim 31 in which said amount is within the range of from about 50 to about 2,500 parts per million parts by weight of the emulsion being treated.
Claim 37
Dependent Claim
14 words
A process of claim 31 in which the water-soluble polymer used is a homopolymer.
Claim 38
Dependent Claim
14 words
A process of claim 31 in which the water-soluble polymer used is a copolymer.
Claim 39
Dependent Claim
15 words
A process of claim 31 in which the water-soluble polymer used is a crosslinked polymer.
Claim 40
Dependent Claim
16 words
A process of claim 31 in which said weight average molecular weight is at least 5,000.
Claim 41
Dependent Claim
22 words
A process of claim 31 in which said weight average molecular weight is in the range of about 10,000 to about 200,000.
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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) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |