Patent application number | Description | Published |
20080207958 | Method For Production Of 1,6-Hexanediol With A Purity In Excess of 99.5% - The present invention provides a process for preparing 1,6-hexanediol by hydrogenating dialkyl adipates, alkyl 6-hydroxycaproates, 1,4-cyclohexanedione and 4-hydroxycyclohexan-1-one as ester mixtures comprising impurities, by
| 08-28-2008 |
20080216390 | Biodiesel Fuel Mixture Containing Polyoxymethylene Dialkyl Ether - A biodiesel fuel mixture having a cetane number of >40, comprising
| 09-11-2008 |
20080221302 | Catalyst and Process for the Polymerization of Cyclic Ethers - The present invention provides a catalyst comprising a mixture of at least one acid-activated sheet silicate with a transition metal oxide of groups 8 and/or 9 of the Periodic Table of the Elements and also a process for preparing polytetrahydrofuran, polytetrahy-drofuran copolymers, diesters or monoesters of these polymers, in which tetrahydrofuran is polymerized in the presence of at least one telogen and/or comonomer over such a catalyst. | 09-11-2008 |
20080221366 | Method for the Hydrogenation of Mass Fluxes Containing Aldehyde - The present application relates to a process for reacting a composition I comprising at least one aldehyde with hydrogen in the presence of a catalyst in at least one main reactor and at least one postreactor, wherein at least 50% of the fresh hydrogen fed to the reaction system is fed into at least one postreactor. In a preferred embodiment, composition I comprises at least one further organic compound. | 09-11-2008 |
20080221371 | 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. | 09-11-2008 |
20080242897 | 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 processing 1,4-butynediol in a dynamic mixing apparatus in an inert gas atmosphere at from 25 to 150° C. at a shear rate in the radial gap between rotor and stator of the mixing apparatus of more than 100 000 sec | 10-02-2008 |
20080275276 | Method for Producing Cyclododecanone - A process for preparing cyclododecanone by reacting cyclododecene with dinitrogen monoxide, comprising in particular steps (I) and (II):
| 11-06-2008 |
20080296145 | Method for Improving the Color Number - The present invention relates to a process for purifying a composition (I) at least comprising cyclododecanone. The process according to the invention for purifying a composition (I) at least comprising cyclododecanone comprises at least step (i)
| 12-04-2008 |
20090134066 | Method for producing alkyl-aromatic compounds by direct alkylation of aromatic hydrocarbons with alkanes - The present invention relates to a process for preparing alkylaromatics by reacting aromatic compounds with C | 05-28-2009 |
20090137849 | METHOD FOR THE SEPARATION OF POLYMERIC BY-PRODUCTS FROM 1,4-BUTYNEDIOL - The present invention relates to processes for making 1,4-butanediol, 1,4-butenediol, or a mixture thereof by processing 1,4-butynediol in a dynamic mixing apparatus in an inert gas atmosphere at from 25 to 150° C. at a shear rate in the radial gap between rotor and stator of the mixing apparatus of more than 100 000 sec | 05-28-2009 |
20090143601 | METHOD FOR PREVENTING FUMARIC ACID DEPOSITS IN THE PRODUCTION OF MALEIC ACID ANHYDRIDE - The present invention provides a process for preventing fumaric acid deposits in the preparation of maleic anhydride, comprising the following steps: | 06-04-2009 |
20090215971 | METHOD FOR THE PRODUCTION OF POLYTETRAHYDROFURANE OR TETRAHYDROFURANE COPOLYMERS - The present invention relates to a process for preparing polytetrahydrofuran or tetrahydrofuran copolymers by polymerization of tetrahydrofuran in the presence of a telogen and/or a comonomer over a fixed bed of an acid catalyst, in which the temperature of the polymerization mixture increases in the direction of flow through the catalyst bed. | 08-27-2009 |
20090281357 | METHOD FOR THE PRODUCTION OF CYCLIC KETONES - The present invention relates to a process for preparing a cyclic ketone having from 7 to 16 carbon atoms, which comprises at least the steps
| 11-12-2009 |
20090314992 | PROCESS FOR WORKING UP SOLVENT-CONTAINING HYDROGENATION PRODUCT MIXTURES - The present invention relates to a process for separating off solvents from solvent-comprising hydrogenation outputs from a catalytic hydrogenation process, which comprise at least one water-soluble hydrogenation product having at least one alcohol, lactone, ether, lactam or amino group in a solvent which is immiscible or not completely miscible with water and has a boiling point below 100° C., wherein water is added to the hydrogenation output, the solvent-comprising phase is separated off and recirculated to the hydrogenation. | 12-24-2009 |
20090318733 | METHOD FOR PURIFYING CYCLIC KETONES - The present invention relates to a process for purifying a composition (I) comprising at least one cyclic ketone having from 7 to 16 carbon atoms, which comprises thermal treatment of the composition (I) with a catalyst comprising at least one transition metal and further purification by means of a process selected from the group consisting of distillation, extraction and crystallization. Furthermore, the present invention relates to a process for preparing cyclododecanone, which comprises such a purification, and the use of at least one catalyst comprising at least one transition metal for purifying a composition (I) comprising at least one cyclic ketone having from 7 to 16 carbon atoms by thermal treatment of the composition (I) with a catalyst comprising at least one transition metal. | 12-24-2009 |
20090326277 | METHOD FOR PURIFYING CYCLIC KETONES - The present invention relates to a process for purifying a composition (I) comprising at least one cyclic ketone having from 7 to 16 carbon atoms, which comprises thermal treatment of the composition (I) with at least one acid and further purification by means of a process selected from the group consisting of distillation, extraction and crystallization, Furthermore, the present invention relates to a process for preparing cyclododecanone, which comprises such a purification, and the use of at least one acid for purifying a composition (I) comprising at least one cyclic ketone having from 7 to 16 carbon atoms by thermal treatment of the composition (I) with the acid. | 12-31-2009 |
20100191018 | PROCESS FOR PREPARING PURE CYCLODODECANONE - The present invention relates to a process for preparing at least one cyclic compound with Z cycles and 7 to 16 carbon atoms with a keto group, at least comprising the stages:
| 07-29-2010 |
20100240864 | METHOD FOR CHANGING THE PREDEFINED MEAN MOLECULAR WEIGHT MN DURING THE CONTINUOUS PRODUCTION OF POLYTETRAHYDROFURANES OR THE COPOLYMERS - The present invention provides a process for changing the given mean molecular weight M | 09-23-2010 |
20110224401 | APPARATUS FOR SEPARATION BY DISTILLATION - The invention relates to an apparatus for separating a liquid substance mixture by distillation, a method for producing a tetrahydrofuran homopolymer and copolymer in which the oligomers in a liquid starting mixture containing oligomers are separated by distillation in such an apparatus, tetrahydrofuran homopolymers and copolymers which can be obtained using said method and have a narrow distribution of the relative molar mass, and the use thereof. | 09-15-2011 |
20110251119 | MIXTURES OF ITACONIC ACID OR ITACONIC ACID DERIVATIVES AND PRIMARY AMINES FOR PRODUCING 1,3- AND 1,4-ALKYL METHYL PYRROLIDONES - The present invention relates to a mixture comprising itaconic acid or an itaconic acid derivative and a primary amine of the formula (I) | 10-13-2011 |
20120245394 | METHOD FOR PRODUCING A SUPPORTED HYDROGENATION CATALYST HAVING INCREASED HYDROGENATION ACTIVITY - In a process for preparing a supported hydrogenation catalyst with increased hydrogenation activity, which comprises a hydrogenating metal and/or an oxide of a hydrogenating metal on an Al | 09-27-2012 |
20130324648 | PROCESS FOR PRODUCING HIGH-PERFORMANCE THERMOPLASTICS WITH IMPROVED INTRINSIC COLOR - The present invention relates to a process for the work-up of polymer solutions comprising N-methyl-2-pyrrolidone and a polymer where the polymer solution is hydrogenated with hydrogen in the presence of a hydrogenation catalyst. | 12-05-2013 |
20140142323 | PROCESS FOR PURIFYING N-ALKYLPYRROLIDONES - Process for purifying N-alkylpyrrolidones which due to a previous use comprise at least one of the impurities of the formula I or II | 05-22-2014 |