Dow Agrosciences LLC

Dow Global Technolgoies LLC

Dow Silicones Corporation

Kenneth E Stockman

Gregory T Whiteker

Nakyen Choy

James M Renga

Yuanming Zhu

Edward D Daugs

Erich J Molitor

Ronald R Peterson

Deboleena Chakraborty

Provided is a method of making ethylenediaminetetraacetic acid (EDTA) comprising the steps: Also provided is a composition comprising a diacid/dinitrile compound (DADN) wherein each —R has the structure:

Making ethylenediaminetetraacetic acid

4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 4,6-dibromo-3-hydroxypicolinonitrile in a series of chemical steps selected from bromo substitution, nitrile hydrolysis and halogen reduction that are conducted as a single pot process. 4,6-Dibromo-3-hydroxypicolinonitrile may be prepared from furfural in a series of chemical steps selected from cyano-amination, amine salt formation and bromination-rearrangement.

Processes for the preparation of 4-alkoxy-3-hydroxypicolinic acids

4,6-Dibromo-3-hydroxypicolinonitrile may be prepared from furfural in a series of chemical steps selected from cyano-amination, amine salt formation and bromination-rearrangement. 4-Alkoxy-3-hydroxypicolinic acids may be conveniently prepared from 4,6-dibromo-3-hydroxypicolinonitrile in a series of chemical steps selected from bromo substitution, nitrile hydrolysis and halogen reduction.

Process for the preparation of 4-alkoxy-3-hydroxypicolinic acids

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Midland, MI, United States of America

Kenneth E Stockman