US3853930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating lanolin and lanolin derivatives
Assignee: Henkel Corp
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Filing: 1972-02-04
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Granted: 1974-12-10
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Expires: 1992-02-04
Abstract
Abstract Lanolin and lanolin derivatives as normally available at the present time contain traces of one or another of the chlorinated hydrocarbon pesticide compounds commonly used in the treatment of sheep for control of ectoparasites. Herein is disclosed a method for the treatment of lanolin and lanolin derivatives, whereby the chlorinated hydrocarbon pesticide content thereof is substantially reduced. The method herein disclosed involves subjecting lanolin or derivatives thereof to treatment at elevated temperatures, while in the form of a relatively slowly moving whirling or socalled ''''wiped film'''' of relatively minute thickness, while held under vacuum.
Inventors
- 👤 T Richey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:50
CPC Classifications
C; C11; C11B; C11B11/00; C11B11/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
THE METHOD OF REDUCING THE PESTICLE CONTENT OF PESTICIDE-CONTAINING LANOLIN AND LANOLIN DERIVATIVES WHICH COMPRISES CONTINUALLY FEEDING A PESTICIDE-CONTAINING LANOLIN MATERIAL WHOSE CONTENT OF SAID PESTICIDE-CONTAINING LANOLIN MATEPARTS PER MILLION OF SAID FEED MATERIAL, INTO A VERTICALLY DISPOSED JACKETED CHAMBER AND CAUSING THE FEED MATERIAL IN SAID CHAMBER TO FLOW DOWNWARDLY ALONG THE INNER SURFACE OF THE CHAMBER IN THE FORM OF A WIPED FILM OF RELATIVELY MINUTE THICKNESS, WHILE MAINTAINING THE JACKET OF THE CHAMBER AT A TEMPERATURE OF 300* TO 550*C., AND SIMULTANEOUSLY SUBJECTING THE FEED MATERIAL TO THE ACTION OF AN INERT VAPOROUS STRIPPING AGENT WHILE MAINTAINING THE FLOWING FILM UNDER A VACUUM OF BETWEEN TWO AND THIRTY MILLIMETERS MERCURY, ABSOLUTE PRESSURE, SAID MATERIAL HAVING INCORPORATED THEREIN, PRIOR TO THE FEEDING THEREOF TO SAID CHAMBER, A MINOR PROPORTION OF PARAFFINIC HYDROCARBON DILUENT, SAID DILUENT HAVING A BOILING POINT SUCH THAT SAID DILUENT WILL BE REMOVED FROM THE LANOLIN OR LANOLIN DERIVATIVES UNDER THE AFORESAID OPERATING CONDITIONS, THEREBY TO PROMOTE REMOVAL OF SAID PESTICIDE FROM THE LANOLIN OR LANOLIN DERIVATIVE.
Claim 2
Independent Claim
172 words
THE METHOD OF REDUCING THE PESTICLE CONTENT OF PESTICIDE-CONTAINING LANOLIN AND LANOLIN DERIVATIVES WHICH COMPRISES CONTINUALLY FEEDING A PESTICIDE-CONTAINING LANOLIN MATERIAL WHOSE CONTENT OF SAID PESTICIDE-CONTAINING LANOLIN MATEPARTS PER MILLION OF SAID FEED MATERIAL, INTO A VERTICALLY DISPOSED JACKETED CHAMBER AND CAUSING THE FEED MATERIAL IN SAID CHAMBER TO FLOW DOWNWARDLY ALONG THE INNER SURFACE OF THE CHAMBER IN THE FORM OF A WIPED FILM OF RELATIVELY MINUTE THICKNESS, WHILE MAINTAINING THE JACKET OF THE CHAMBER AT A TEMPERATURE OF 300* TO 550*C., AND SIMULTANEOUSLY SUBJECTING THE FEED MATERIAL TO THE ACTION OF AN INERT VAPOROUS STRIPPING AGENT WHILE MAINTAINING THE FLOWING FILM UNDER A VACUUM OF BETWEEN TWO AND THIRTY MILLIMETERS MERCURY, ABSOLUTE PRESSURE, SAID MATERIAL HAVING INCORPORATED THEREIN, PRIOR TO THE FEEDING THEREOF TO SAID CHAMBER, A MINOR PROPORTION OF PARAFFINIC HYDROCARBON DILUENT, SAID DILUENT HAVING A BOILING POINT SUCH THAT SAID DILUENT WILL BE REMOVED FROM THE LANOLIN OR LANOLIN DERIVATIVES UNDER THE AFORESAID OPERATING CONDITIONS, THEREBY TO PROMOTE REMOVAL OF SAID PESTICIDE FROM THE LANOLIN OR LANOLIN DERIVATIVE.
Claim 3
Dependent Claim
40 words
The method as defined in claim 1, wherein the pesticide content of lanolin and lanolin derivatives is thereby reduced from a normal concentration of about seven to 20 parts per million to a concentration substantially below seven parts per million.
Claim 4
Dependent Claim
28 words
The method defined in claim 1, wherein there is affected a removal of at least 20 percent of the pesticide normally present in the lanolin or lanolin derivative.
Claim 5
Dependent Claim
14 words
The method of claim 1, wherein the pesticide is a chlorinated aromatic hydrocarbon compound.
References Cited (Backward Citations)
US3272850A
Cited
US3272851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |