Patent · US Active

Altering the crystal size distribution of N-(phosphonomethyl) iminodiacetic acid for improved filtration and product quality

US7705178B2 · kind B2 · utility

0Cited by

24References

66Claims

0Family size

Assignee

Monsanto Technology LLC · US

Inventors

Sunder Rangachari · Ballwin, US
Todd Friedman · Imperial, US
Sherrol L. Baysdon · Chesterfield, US
David Z. Becher · Chesterfield, US

Key dates

Filing date	Apr 25, 2006
Grant date	Apr 27, 2010
Priority date	—
Expiry date	Jul 1, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F9/3813
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Improved processes for preparing and crystallizing N-(phosphonomethyl)iminodiacetic acid are provided. The processes include adding N-(phosphonomethyl)iminodiacetic acid seed crystals to N-(phosphonomethyl)iminodiacetic acid reaction solutions. Provided are beds of crystallized N-(phosphonomethyl)iminodiacetic acid having improved permeability and filtration rate and reduced impurities.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.