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Carr, Bertem
Robert Carr, Bertem GB
| Patent application number | Description | Published |
|---|---|---|
| 20100213126 | PROCESS FOR FRACTIONATING A MIXTURE OF POLYISOCYANATES - Method of fractionating a mixture of polyisocyanates in the liquid phase, optionally in the presence of a suitable solvent or mixture of two or more solvents, by means of a selectively permeable membrane into a permeate stream and a retentate stream of polyisocyanate compositions different to each other and different to the original mixture. | 08-26-2010 |
Robert Carr, Bertem BE
| Patent application number | Description | Published |
|---|---|---|
| 20100174114 | PROCESS FOR THE PREPARATION OF DI- AND POLYAMINES OF THE DIPHENYLMETHANE SERIES - The present invention relates to a process for the preparation of di- and polyamines of the diphenylmethane series, and to the preparation of di- and polyisocyanates of the diphenylmethane series from these di- and polyamines. The di- and polyamines of the diphenylmethane series are prepared by the reaction of aniline and formaldehyde in the presence of hydrochloric acid. In the present invention, the formaldehyde employed is used as an aqueous solution which contains less than 0.001 wt % of metal ions which are divalent and/or more than divalent. | 07-08-2010 |
| 20100185011 | PROCESS FOR PREPARING MIXTURES OF DIPHENYL-METHANE DIISOCYANATES AND POLYPHENYL-POLYMETHYLENE POLYISOCYANATES - The present invention relates to a process for preparing mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates by sequential reaction of benzene to nitrobenzene to aniline to polyphenyl polymethylene polyamines to polyphenyl polymethylene polyisocyanates wherein the benzene used as the starting material contains 500 to 5000 ppm w/w toluene and/or xylenes. | 07-22-2010 |
Robert Henry Carr, Bertem BE
| Patent application number | Description | Published |
|---|---|---|
| 20080249202 | Method for the Production of Polyisocyanates - Process for preparing polyisocyanates involving the removal of a solvent-stream enriched in volatile, aromatic, non-isocyanate-group-containing contaminants from the polyisocyanate production process. | 10-09-2008 |
| 20080312405 | Process for Preparing Diaminodiphenylmethanes - Process for preparing diamino diphenyl methane and poly-(diamino diphenyl methane) comprising reacting aniline with formaldehyde in the presence of hydrogen chloride added in the gaseous form wherein the aniline contains 0.1 to 7 wt %, preferably 2 to 5 wt % of a protic chemical, preferably water. | 12-18-2008 |
| 20100191010 | PROCESS FOR THE SYNTHESIS OF CARBAMATES USING CO2 - Process for the synthesis of non cyclic carbamate derivatives from amine compounds, alcohols and CO | 07-29-2010 |
| 20100204510 | PROCESS FOR PRODUCTION OF DI- AND POLYAMINES OF THE DIPHENYLMETHANE SERIES - Process for the production of di- and poly(diamino diphenyl methane) comprising the steps of | 08-12-2010 |
| 20110045553 | PROCESS FOR CONVERTING TRYPTOPHAN INTO KYNURENINE - A process for converting tryptophan into kynurenine. The conversion of tryptophan into kynurenine is carried out by irradiating a substance comprising tryptophan with electromagnetic radiation comprising waves with wavelength in the range of 10 nanometer to 750 nanometer. | 02-24-2011 |