US4215067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of zinc salts of dihydrocarbyldithiophosphoric acids
Assignee: Ethyl Corp
•
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 05:02
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)
US2837549A
Cited
US3168497A
Cited
US3086939A
Cited
US3290347A
Cited
US3361668A
Cited
US3471540A
Cited
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 |