Patent US4215067A successfully refreshed from Google Patents.
US4215067A
Expired / Lapsed
US
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Process for the preparation of zinc salts of dihydrocarbyldithiophosphoric acids
Assignee: Ethyl Corp
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Filing: 1978-12-29
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Granted: 1980-07-29
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Expires: 1998-12-29
Abstract
Abstract Processes for the manufacture of substantially haze free zinc salts of dihydrocarbyldithiophosphoric acid comprising the addition of an effective amount of a surface active agent or surfactant at or prior to the neutralization of a dihydrocarbyldithiophosphoric acid by zinc oxide that reduces the Electrophoretic mobility (EM) of an untreated colloidal zinc oxide particle by about 25%. Generally the mobility of the treated colloidal zinc compound particle is reduced to less than about 1.0 ×10 -3 microns/sec. per volt/cm.
Inventors
- 👤 Cecil G. Brannen
- 👤 Nicolas C. Petrellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:29
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
28 words
A process for the production of substantially haze-free zinc dihydrocarbyl dithiophosphate comprising reacting a dihydrocarbyl dithiophosphoric acid and zinc oxide in the presence of a surface active agent.
Claim 2
Dependent Claim
28 words
A process for the production of substantially haze-free zinc dihydrocarbyl dithiophosphate comprising reacting a dihydrocarbyl dithiophosphoric acid and zinc oxide in the presence of a surface active agent.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein the surface active agent is added prior to the reaction of the dihydrocarbyl dithiophosphoric acid with the zinc oxide.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein the surface active agent comprises formaldehyde/octyl phenoxy poly(ethoxy) ethanol resin and an ethylene glycol ester of polyethoxy ethanol.
Claim 5
Dependent Claim
26 words
The process of claim 1 wherein the surface active agent is used at a concentration reducing the Electrophoretic mobility of the zinc compound particle by 25%.
Claim 6
Dependent Claim
27 words
The process of claim 1 wherein the surface active agent is used at a concentration reducing the Electrophoretic mobility to less than 1.0×10 -3 microns/sec. per volt/cm.
Claim 7
Dependent Claim
31 words
The process of claim 1 wherein the surface active agent is used at a concentration of about 1 to 3000 parts of surface active agent per million parts of reaction mixture.
Claim 8
Dependent Claim
31 words
The process of claim 1 wherein the surface active agent is used at a concentration of about 50 to 2500 parts of surface active agent per million parts of reaction mixture.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein the surface active agent is non-ionic.
Claim 10
Dependent Claim
12 words
The process of claim 1 wherein the surface active agent is anionic.
Claim 11
Dependent Claim
12 words
The process of claim 1 wherein the surface active agent is cationic.
Claim 12
Dependent Claim
62 words
A process for the production of substantially haze-free zinc dihydrocarbyl dithiophosphate which comprises reacting a dihydrocarbyl dithiophosphoric acid with an approximately stoichiometric amount of zinc oxide in the presence of about 50-2,500 parts of a surface active agent per million parts of the reaction mixture at a temperature of about 30°-250° C., stripping water of neutralization, and recovering the zinc dihydrocarbyl dithiophosphate.
Claim 13
Dependent Claim
62 words
A process for the production of substantially haze-free zinc dihydrocarbyl dithiophosphate which comprises reacting a dihydrocarbyl dithiophosphoric acid with an approximately stoichiometric amount of zinc oxide in the presence of about 50-2,500 parts of a surface active agent per million parts of the reaction mixture at a temperature of about 30°-250° C., stripping water of neutralization, and recovering the zinc dihydrocarbyl dithiophosphate.
Claim 14
Dependent Claim
28 words
The process of claims 1 and 11 wherein the surface active agent is selected from the group consisting of an alkyl phenoxy poly(ethoxy) ethanol and dialkyl sodium sulfosuccinate.
References Cited (Backward Citations)
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Cited
US3168497A
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US3086939A
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US3290347A
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US3361668A
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US3471540A
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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) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |