| Patent application number | Description | Published |
|---|
| 20090137825 | METHOD OF PRODUCING A CARBOXYLIC ALKYL ESTER - The present invention relates to a novel process for preparing alkyl polycarboxylates from an aqueous solution of an ammonium salt of the polycarboxylic acid by reactive distillation, and to a process for hydrogenating the alkyl carboxylates prepared in this way. | 05-28-2009 |
| 20090187050 | METHOD FOR THE SEPARATION OF POLYMERIC BY-PRODUCTS FROM 1,4-BUTYNEDIOL - The present invention relates to a process for purifying 1,4-butynediol, which comprises compressing 1,4-butynediol to from 50 to 1500 bar, depressurizing it, waiting for phase separation to occur after depressurization and separating off the bottom phase, and a process for the hydrogenation of 1,4-butynediol to 1,4-butenediol and 1,4-butanediol using the purified 1,4-butynediol. | 07-23-2009 |
| 20100016643 | PROCESS FOR PREPARING 1,4-BUTANEDIOL - The present invention provides an integrated process for continuously preparing 1,4-butanediol, which comprises the following stages: | 01-21-2010 |
| 20100044626 | METHOD FOR PRODUCING PYRROLIDONES FROM SUCCINATES FROM FERMENTATION BROTHS - The present invention relates to a process for preparing a compound II or a composition comprising the compound II | 02-25-2010 |
| 20100048922 | PROCESS FOR ONE-STAGE PREPARATION OF 2-METHYLTETRAHYDROFURAN FROM FURFURAL OVER TWO CATALYSTS IN A STRUCTURED BED - The present invention provides a process for preparing 2-methyltetrahydrofuran by one-stage hydrogenation of furfural with a hydrogen-comprising gas in the presence of a structured bed of at least one copper catalyst and at least one catalyst which comprises at least one noble metal from groups 8, 9 and/or 10 of the periodic table of the elements applied on a support material. | 02-25-2010 |
| 20100099895 | PROCESS FOR ONE-STAGE PREPARATION OF 2-METHYLTETRAHYDROFURAN FROM FURFURAL OVER A CATALYST - The present invention provides a process for preparing 2-methyltetrahydrofuran by one-stage hydrogenation of furfural with a hydrogen-comprising gas in the presence of a supported catalyst which comprises at least one noble metal from groups 8, 9 and/or 10 of the periodic table of the elements. | 04-22-2010 |
| 20100101931 | PROCESS FOR PREPARING VERY PURE 1,4-BUTANEDIOL - The present invention provides a process for distillatively purifying crude aqueous 1,4-butanediol ( | 04-29-2010 |
| 20100168445 | PROCESS FOR PREPARING EPSILON-CAPROLACTONE - The present invention provides a process for preparing ε-caprolactone in a purity above 99%, in which 6-hydroxycaproic ester comprising from 0.5 to 40% by weight of adipic diester is cyclized in the gas phase at from 150 to 450° C. in the presence of oxidic catalysts and ε-caprolactone is obtained from the cyclization product by distillation. | 07-01-2010 |
| 20100240913 | PROCESS FOR PREPARING EPSILON-CAPROLACTONE - The present invention provides a process for preparing ε-caprolactone in a purity of more than 99% by cyclizing 6-hydroxycaproic esters in the liquid phase at from 150 to 400° C. and from 1 to 1020 hPa abs., and removing and condensing the compounds which are volatile under cyclization conditions, which comprises thermally treating the remaining bottom product of the cyclization in at least one further reactor, removing and condensing volatile compounds and obtaining ε-caprolactone by distillation from the condensates. | 09-23-2010 |
| 20100286399 | PROCESS FOR THE PREPARATION OF AN N-ALKYL LACTAM WITH IMPROVED COLOUR QUALITY - A process for preparing an N-alkyllactam with improved color quality, wherein from 0.01 to 10% by weight of a C | 11-11-2010 |
| 20100286411 | PROCESS FOR THE PREPARATION OF AN N-ALKYL LACTAM WITH IMPROVED COLOUR QUALITY - A process for preparing an N-alkyllactam with improved color quality, wherein from 0.01 to 10% by weight of a C | 11-11-2010 |
| 20100305339 | METHOD FOR PRODUCING LACTONES FROM DIOLS - The present invention provides a process for preparing lactones from optionally substituted, saturated aliphatic diols having from five to 20 carbon atoms between the two ring-closing hydroxyl groups by catalytic dehydrogenation and cyclization in the liquid phase over at least one catalyst. | 12-02-2010 |
| 20110015429 | PROCESS FOR PREPARING 6-HYDROXYCAPROIC ESTERS - The present application relates to an improved process for preparing 6-hydroxycaproic esters from the by-product mixtures which are obtained in the oxidation of cyclohexane to cyclohexanol and cyclohexanone with oxygen or oxygen-comprising gas mixtures. | 01-20-2011 |
| 20110124905 | PROCESS FOR PREPARING PLASTICS USING 1,6-HEXANEDIOL HAVING AN ALDEHYDE CONTENT OF LESS THAN 500 PPM - The present invention relates to a process for preparing plastics using 1,6-hexanediol having an aldehyde content of less than 500 ppm, a process for preparing 1,6-hexanediol having an aldehyde content of less than 500 ppm and also 1,6-hexanediol having an aldehyde content of less than 500 ppm. | 05-26-2011 |
| 20110124925 | PROCESS FOR PREPARING 1,6-HEXANEDIOL - The invention relates to a process for preparing 1,6-hexanediol, in which a hexanediol having a proportion by weight of nitrogen of less than 5 ppm is obtained, 1,6-hexanediol having a proportion by weight of nitrogen of less than 5 ppm and also the use of this 1,6-hexanediol for preparing polymers. | 05-26-2011 |
| 20110124926 | PROCESS FOR PREPARING DIOLS BY HYDROGENATING A CARBOXYLIC ACID-COMPRISING MIXTURE BY MEANS OF COBALT-COMPRISING CATALYSTS - The present invention relates to a process for preparing diols by hydrogenating a mixture comprising carboxylic acid, carboxylic anhydrides and/or carboxylic esters/lactones by means of a cobalt-comprising catalyst, wherein alkali metal and/or alkaline earth metal ions are added to the hydrogenation feed, excluding alkali metal and/or alkaline earth metal ions of mineral acids. | 05-26-2011 |
