Process for the production of aliphatic phosphonic acids
US4728466A · kind A · utility
2Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1987 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | May 26, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/3808
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improvement in the process for the manufacture of aliphatic phosphonic acid the improvement comprising maintaining the reaction zone volume at about 80 to 95 percent capacity of reactants and/or products by continuously adding diester of aliphatic phosphonic acid reactant up to about 60 percent of the total reaction time said reactant being added in an amount sufficient such that said reactants and/or products will always be present in said reactor so as to occupy at least 80 percent of the reaction zone volume during said reactant addition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.