Ethane-1,2 - dicarboxy - 1,2-dihydroxy-1,2-diphosphonic acid,lower alkyl esters,alkali metal salts thereof and process for preparing same

Abstract

Abstract COMPOUNDS HAVING THE FORMULA R-OOC-C(-OH)(-P(=O)(-O-R)2)-C(-OH)(-P(=O)(-O-R)2)-COO-R IN WHICH R IS HYDROGEN ALKALI METAL, OR AN ALKYL GROUP HAVING FROM 1 TO ABOUT 6 CARBON ATOMS, AMMONIUM OR ALKANOLAMMONIUM HAVING 1 TO 3 CARBON ATOMS IN EACH ALKANOL GROUP BY A PROCESS WHICH COMPRISES REACTING AN ESTER OF ETHANE-1,2-DICARBOXY-1,2-DIPHOSPHONIC ACID WITH AN ALKALI METAL HYPOHALITE TO FORM AN EPOXIDE COMPOUND HAVING THE FORMULA 2,3-DI(R''-OOC-),2,3-DI(O=P(-O-R'')2-)OXIRANE IN WHICH R'' IS AN ALKYL GROUP HAVING FROM 1 TO ABOUT 6 CARBON ATOMS, AND HYDROLYZING SAID EPOXIDE. THE COMPOUNDS ARE USEFUL AS DETERGENCY BUILDERS, SEQUESTERING AGENTS AND ANTI-CALCULUS AGENTS IN ORAL COMPOSITIONS.

Inventors

• 👤 Denzel Allan Nicholson
• 👤 Darrel Campbell

Bibliographic Details