IP Library › Granted Patent US 7,208,452
Granted Patent B2
US 7,208,452 · App. 10/439,751 · Granted Apr 24, 2007

Process for manufacturing alkylphosphonate monoesters

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Quick Facts
Patent No.
US 7,208,452
App. No.
10/439,751
Granted
Apr 24, 2007
Kind
B2
Abstract

The present invention discloses a process for manufacturing an alkylphosphonate monoester. The process may comprise partially hydrolyzing an alkyl phosphonate diester with an alkaline compound in a first solvent to provide a reaction mixture, wherein the first solvent comprises a mixture of an alcohol and water. The reaction mixture may be diluted with a second solvent to provide an organic phase, wherein the second solvent comprises at least one non-polar organic solvent. The process may comprise acidifying the reaction mixture with an acid, wherein the organic phase includes an alkylphosphonate monoester.

Claims (13)

1. A lubricant comprising an alkyphosphonate monoester manufactured by:

partially hydrolyzing an alkylphosphonate diester with an alkaline compound in a first solvent to provide a reaction mixture, wherein the first solvent comprises a mixture of an alcohol and water;

diluting the reaction mixture with a second solvent to provide an organic phase, wherein the second solvent comprises at least one non-polar organic solvent;

acidifying the reaction mixture with an acid, wherein the organic phase includes an alkylphosphonate monoester.

2. An additive for a power transmission fluid, comprising:

an effective amount of an alkylphosphonate monoester manufactured by a process comprising:

partially hydrolyzing an alkyl phosphonate diester with an alkaline compound in a first solvent to provide a reaction mixture, and wherein the first solvent comprises a mixture of an alcohol and water;

diluting the reaction mixture with a second solvent to provide an organic phase, wherein the second solvent comprises at least one non-polar organic solvent;

acidifying the reaction mixture with an acid, wherein the organic phase includes an alkylphosphonate monoester.

3. A power transmitting fluid comprising a major amount of a base oil and an effective amount of an alkylphosphonate monoester manufactured by a process comprising:

partially hydrolyzing an alkyl phosphonate diester with an alkaline compound in a first solvent to provide a reaction mixture, and wherein the first solvent comprises a mixture of an alcohol and water;

diluting the reaction mixture with a second solvent to provide an organic phase, wherein the second solvent comprises at least one non-polar organic solvent;

acidifying the reaction mixture with an acid, wherein the organic phase includes an alkylphosphonate monoester.