Patent application number | Description | Published |
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 |
20100105951 | PROCESS FOR PREPARING DIPHENYLMETHANEDIAMINE - The invention provides a process for preparing diphenylmethanediamine, comprising the steps of
| 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 |
20100189623 | METHOD FOR THE RECOVERY OF MINERAL ACIDS FROM SALINE SOLUTIONS - The invention relates to a process for recovering acids from product streams of organic syntheses, which comprises the steps
| 07-29-2010 |
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 |
20110118510 | METHOD FOR PRODUCING PHENYLALKANE-1-OLS - The present invention relates to a process for preparing phenylalkan-1-ols in three stages, where an ester condensation in the presence of alkali metal or alkaline earth metal alcoholates is carried out in the first stage. | 05-19-2011 |
20110263892 | PROCESS FOR PREPARING AN ISOCYANATE - The present invention relates to a process for preparing an isocyanate, comprising hydrogenating a mixture (Gi) comprising an amine in the presence of a hydrogenation catalyst comprising copper to obtain a mixture (Gii) comprising the amine, and reacting the mixture (Gii) with phosgene to obtain a mixture (Giii) comprising the isocyanate. The present invention further relates to the isocyanate preparable by this process. | 10-27-2011 |
20120010419 | METHOD FOR PRODUCING 1,6-HEXANEDIOL AND CAPROLACTONE - The invention relates to a process for preparing 1,6-hexanediol and caprolactone, preferably with at least 99.5% purity, which are especially virtually free of 1,4-cyclohexanediols, from a carboxylic acid mixture which is obtained as a by-product of the catalytic oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-comprising gases and by water extraction of the reaction mixture, by hydrogenating the carboxylic acid mixture, esterifying and hydrogenating a substream to hexanediol and cyclizing 6-hydroxycaproic ester, the 1,4-cyclohexanediols being removed either in the course of fractionation of the esterification mixture or last from the caprolactone. | 01-12-2012 |
20120022298 | METHOD FOR PRODUCING 1,6-HEXANEDIOL - The invention relates to a process for preparing 1,6-hexanediol, preferably with at least 99.5% purity, which are especially virtually free of 1,4-cyclohexanediols, from a carboxylic acid mixture which is obtained as a by-product of the catalytic oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-comprising gases and by water extraction of the reaction mixture, by hydrogenating the carboxylic acid mixture, esterifying and hydrogenating a substream to hexanediol. | 01-26-2012 |
20120031771 | PROCESS FOR PREPARING REACTIVE ZINC BY ELECTROCHEMICAL REDUCTION - The invention relates to a process for preparing reactive zinc by electrochemical reduction, wherein iron or steel is used as cathode material. | 02-09-2012 |
20120046497 | METHOD FOR PRODUCING COLOR-STABLE MDA AND MDI - The invention relates to a process for preparing methylenediphenyldiamine (MDA) by reacting formaldehyde and aniline in the presence of an acidic catalyst, wherein the oxygen content in the process for preparing MDA is <10 000 ppm, based on all compounds present in the process. | 02-23-2012 |
20120059174 | PROCESS FOR PREPARING EPSILON-CAPROLACTONE AND 1,6-HEXANEDIOL - The invention relates to processes for preparing 1,6-hexanediol and very pure ε-caprolactone from a dicarboxylic acid solution (DCS), comprising the steps of (a) esterification of the DCS with alcohols, (b) partial catalytic hydrogenation of the esters, (c) distillative removal of 1,6-hexanediol and low boilers as the top product, and (d) cyclization of the 6-hydroxycaproic ester present in the bottoms fraction in the presence of a higher-boiling alcohol than caprolactone. | 03-08-2012 |