US3909445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reducing foam in water containing systems
Assignee: Mobil Oil AS
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Filing: 1972-09-21
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Granted: 1975-09-30
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Expires: 1992-09-21
Abstract
Abstract The invention provides a method for reducing foam in water containing systems by using a low-molecular weight polyethylene dispersed in a vehicle containing, for example, a mineral oil or fatty material and an emulsifier. The dispersion of polyethylene is produced by heating the polyethylene in a vehicle, such as mineral oil, to dissolve said polyethylene in said vehicle, and cooling the resulting solution to at least 60*C. such that the cooling rate is never less than 4*C. per minute nor more than about 20*C. per minute.
Inventors
- 👤 Franz J M Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:05
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/16; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
153 words
IN A METHOD FOR DEFORMING A SYSTEM CONSISTING ESSENTIALLY OF WATER AND AN EMULSUFIABLE NATURAL OF SYNTHETIC OIL, A WAX, A GLUE OR A DETERGENT, THE IMPROVEMENT WHEREBY THERE IS ADDED TO SAID SYSTEM A POLYETHYLENE HAVING A MOLECULAR WEIGHT OFF FROM SBOUT 500 TO ABOUT 25,000, SAID POLYETHYLENE HAVING BEEN DISSOLVED BY HEATING IN A VEHICLE SELECTED FROM THE GROUP CONSISTING OF TETRAISOBUTYLENE, MINERAL OILS, FATTY OILS, FATTY ACIDS, EMULSIFIERS SELECTED FROM THE GROUP CONSISTING OF SODIUM PETROL SULFONATE, CH3-(CH2) 11.13-(OCH2-CH2)5OH, C9H19-C6H4-(OCH2-CH2)5OH AND MIXTURES THEREOF AND THE RESULTING SOLUTION COOLED TO AT LEAST 60*C SUCH THATT THE COOLING RATE IS NEVER LESS THAN ABOUT 4*C PER MINUTEE NOR MORE THAN ABOUT 20*C PER MINUTE, THE RESULTING DISPERSION OF POLYETHYLENE AND VEHICLE CONTANING FROM ABOUT 0.5 TO ABOUT 15% OF POLYETHYLENE AND BEING ADDED TO SAID SYSTEM IN SUFFICIENT AMOUNT TO PROVIDE FROM ABOUT 0.0002 TO ABOUT 0.1% BY WEIGHT OF POLYETHYLENE THEREIN.
Claim 2
Dependent Claim
153 words
IN A METHOD FOR DEFORMING A SYSTEM CONSISTING ESSENTIALLY OF WATER AND AN EMULSUFIABLE NATURAL OF SYNTHETIC OIL, A WAX, A GLUE OR A DETERGENT, THE IMPROVEMENT WHEREBY THERE IS ADDED TO SAID SYSTEM A POLYETHYLENE HAVING A MOLECULAR WEIGHT OFF FROM SBOUT 500 TO ABOUT 25,000, SAID POLYETHYLENE HAVING BEEN DISSOLVED BY HEATING IN A VEHICLE SELECTED FROM THE GROUP CONSISTING OF TETRAISOBUTYLENE, MINERAL OILS, FATTY OILS, FATTY ACIDS, EMULSIFIERS SELECTED FROM THE GROUP CONSISTING OF SODIUM PETROL SULFONATE, CH3-(CH2) 11.13-(OCH2-CH2)5OH, C9H19-C6H4-(OCH2-CH2)5OH AND MIXTURES THEREOF AND THE RESULTING SOLUTION COOLED TO AT LEAST 60*C SUCH THATT THE COOLING RATE IS NEVER LESS THAN ABOUT 4*C PER MINUTEE NOR MORE THAN ABOUT 20*C PER MINUTE, THE RESULTING DISPERSION OF POLYETHYLENE AND VEHICLE CONTANING FROM ABOUT 0.5 TO ABOUT 15% OF POLYETHYLENE AND BEING ADDED TO SAID SYSTEM IN SUFFICIENT AMOUNT TO PROVIDE FROM ABOUT 0.0002 TO ABOUT 0.1% BY WEIGHT OF POLYETHYLENE THEREIN.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the vehicle is a mineral oil.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the vehicle is a fatty material.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the vehicle is an emulsifier alone or in admixture with mineral oil or fatty material.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein the temperature is from about 90*C to about 150*C.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein the temperature is from about 90*C to about 120*C.
Claim 8
Dependent Claim
17 words
The method of claim 1 wherein the rate of cooling is not less than 8*C per minute.
Claim 9
Dependent Claim
13 words
The method of claim 1 wherein the system is an aqueous emulsion system.
Claim 10
Dependent Claim
11 words
The method of claim 1 wherein the vehicle is rapeseed oil.
Claim 11
Dependent Claim
11 words
The method of claim 1 wherein the vehicle is butyl stearate.
Claim 12
Dependent Claim
11 words
The method of claim 1 wherein the vehicle is tall oil.
Claim 13
Dependent Claim
10 words
The method of claim 1 wherein the vehicle is tetraisobutylene.
Claim 14
Dependent Claim
14 words
The method of claim 1 wherein the polyethylene has a molecular weight of 2,000.
Claim 15
Dependent Claim
11 words
The method of claim 4 wherein the emulsifier is an alkylethoxylate.
Claim 16
Dependent Claim
25 words
The method of claim 14 wherein the alkylethoxylate has from about 12 to about 14 carbon atoms in the alkyl portion and about 5 ethoxyls.
Claim 17
Dependent Claim
30 words
The method of claim 1 wherein the vehicle comprises a mixture of mineral oil and an alkylethoxylate emulsifier, and wherein the polyethylene has an average molecular weight of 2, 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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |