E.i. Dupont De Nemours and Company

Fmc Corporation

Fmc Agro Singapore Pte. Ltd.

Rupert Spence

Mark Andrew Harmer

Scott Christopher Jackson

Christian Hoffmann

Edward R Murphy

Stephen Ernest Jacobson

Donald J Dumas

Howard C Ng

Sigridur Soley Kristjansdottir

Aaron Minter

Tuyu Xie

Sarah May Crawford

Venkateswara Rao Surisetty

David C Confer

Robert Louis Stevens

Venkafeswara Rao Surisetty

A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalyst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized. A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above.  wherein Ris C-Calkyl, C-Ccycloalkyl or C-Calkylcycloalkyl.

Process to prepare 3-methyl-2-nitrobenzoic acid by air oxidation

Processes for reducing the color of polytrimethylene ether glycol or copolymers thereof are provided. The processes include polycondensing diols in the presence of an acid catalyst and adding base continuously over a period of the polycondensation reaction. The invention also relates to the polytrimethylene ether glycol thereof produced by these processes.

Polytrimethylene ether glycol or copolymers thereof having improved color and processes for their preparation

This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of the reaction is controlled such that the average temperature during the first half of the reaction is higher than the average temperature during the second half of the reaction.

Preparation of polytrimthylene ether glycol or copolymers thereof

This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof having a number-average molecular weight of at least about 250 g/mole by a polycondensation reaction using at least one acid catalyst.

Preparation of polytrimethylene ether glycol or copolymers thereof

Improved suspensions of transition metal complexes of 2,6-diacylpyridine(bisimines) or 2,6-pyridinedicarboxaldehyde(bisimines), which are useful in catalysts for the polymerization or oligomerization of olefins, are prepared by sonicating a mixture of one or more of these complexes and an inert liquid. The resulting suspensions can be directly used as olefin polymerization or oligomerization catalyst components in oligomerization or polymerization processes. These processes may produce, for example, polyolefins useful for molding resins or films, or linear &#x3b1;-olefins.

Olefin polymerization catalyst

Growing community of inventors

Kingston, Canada

Rupert Spence