Dow Global Technolgoies LLC

Dow Agrosciences LLC

Blue Cube IP LLC

Brian Murdoch

Jason S Fisk

Haifeng Shi

Mrunmayi Kumbhalkar

David A Babb

Ronald B Leng

Matthew Lee Grandbois

Abraham D Schuitman

Wu Chen

Megan E Donaldson

David J Couling

Matthew M Meyer

Lin Zhao

Curtis M Whaley

Polyethers are prepared by polymerizing an alkylene oxide in the presence of a double metal cyanide catalyst complex and certain Mmetal or semi-metal compounds. The double metal cyanide catalyst complex contains 0.5 to 2 weight percent potassium. The ability of this catalyst system to tolerate such high amounts of potassium permits the catalyst preparation procedure to be simplified and less expensive.

Polyether polymerization process

A process for separating a catalyst component from a catalyst-containing slurry by centrifugation including separating the catalyst component from the mother liquor of the catalyst-containing slurry using a stacked disc centrifuge equipped with an auto-discharging functionality. The solids discharge from the stacked disc centrifuge is enhanced by adding a washing solution to the bowl and the solids discharge chute of the stacked disc centrifuge.

Catalyst separation process

A method of preparing benzyl 4-amino-3-chloro-5-fluoro-6-(4-chloro-2-fluoro-3-methoxyphenyl)picolinate (I) from benzyl 4,5-difluoro-6-(4-chloro-2-fluoro-3-methoxyphenyl)picolinate (II) is described. The method includes the use of amination and chlorination process steps to provide the compound of Formula I.

Method of preparing benzyl 4-amino-3-chloro-5-fluoro-6-(4-chloro-2-fluoro-3-methoxyphenyl)picolinate

Processes for the production of chlorinated propenes are provided. The processes proceed through the production of cyclic intermediate that is thereafter readily converted to a desired chloropropane, e.g., via selective pyrolysis. The process may be conducted using starting materials that are readily commercially available and/or that may be reacted safely in standard laboratory equipment so that capital cost savings may be seen. The process does not require the use of catalysts and yet, process conditions less extreme than many conventional processes for the production of chlorinated propenes are suitable, so that raw material and utility cost savings are also possible.

Process for the production of chlorinated propenes

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Midland, MI, United States of America

Brian Murdoch