Patent application number | Description | Published |
20080207949 | Method For The Production Of N,N-Dimethylacetamide (Dmac) - A process for preparing N,N-dimethylacetamide (DMAC) by continuously reacting methyl acetate (MeOAc) with dimethylamine (DMA) in the presence of a basic catalyst, wherein MeOAc is used in the form of a methanolic solution which is obtained as a by-product in the preparation of polyTHF by transesterifying polyTHF diacetate with methanol. | 08-28-2008 |
20100130781 | METHOD FOR THE PRODUCTION OF N,N-DIMETHYLACETAMIDE (DMAC) - A process for preparing N,N-dimethylacetamide (DMAC) by continuously reacting methyl acetate (MeOAc) with dimethylamine (DMA) in the presence of a basic catalyst, wherein MeOAc is used in the form of a methanolic solution and the continuous distillative workup is effected in such a way that methanol and any other low boilers are initially removed overhead in a column A and the bottom effluent of column A is fed to a column B in which DMAC is removed via a side draw a purity of ≧99.7% by weight. | 05-27-2010 |
20110021789 | PROCESS FOR SEPARATING OFF FUMARIC ACID AND OTHER MINOR COMPONENTS DURING THE PRODUCTION OF MALEIC ANHYDRIDE - A process for decreasing fumaric acid deposits in the preparation of maleic anhydride by heterogeneously catalyzed oxidation of a hydrocarbon with molecular oxygen, in which the maleic anhydride is absorbed from the crude product mixture in an absorbent in an absorption column and desorbed again in a desorption column, the entirety or a portion of the absorbent depleted in maleic anhydride, for controlled precipitation of fumaric acid, being cooled and/or concentrated by evaporating a portion of the absorbent to such an extent that the difference between the concentration of fumaric acid in the recycle stream at the outlet of the desorption column under the conditions existing there and the equilibrium concentration of fumaric acid according to the solubility curve after the cooling and/or evaporation of a portion of the absorbent is greater than or equal to 250 ppm by weight, and the fumaric acid precipitated as a solid is removed completely or partly from the absorbent recycling system and the fumaric acid-depleted absorbent is recycled completely or partly to the absorption column. | 01-27-2011 |
20110082316 | METHOD FOR THE PRODUCTION OF N,N-DIMETHYLACETAMIDE (DMAC) - A process for preparing N,N-dimethylacetamide (DMAC) by continuously reacting methyl acetate (MeOAc) with dimethylamine (DMA) in the presence of a basic catalyst, wherein MeOAc is used in the form of a methanolic solution which is obtained as a byproduct in the preparation of polyTHF by transesterifying polyTHF diacetate with methanol. | 04-07-2011 |
20110118365 | PROCESS FOR THE SELECTIVE PREPARATION OF LIGHT OLEFINS - Process for preparing olefins, which comprises the following steps:
| 05-19-2011 |
20110245517 | PROCESS FOR PREPARING TETRAHYDROFURAN - The present invention relates to a process for preparing tetrahydrofuran by absorption of C | 10-06-2011 |
20120157737 | REACTOR FOR CARRYING OUT AN AUTOTHERMAL GAS-PHASE DEHYDROGENATION - A reactor includes an essentially horizontal cylinder for carrying out an autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream using an oxygen-comprising gas stream to give a reaction gas mixture over a heterogeneous catalyst configured as monolith. The interior of the reactor is divided by a detachable, cylindrical or prismatic housing, which is arranged in the longitudinal direction of the reactor and is gastight in the circumferential direction, into an inner region having one or more catalytically active zones, each having a packing composed of monoliths stacked on top of one another, next to one another and behind one another and before each catalytically active zone in each case a mixing zone having solid internals are provided and into an outer region, which is supplied with an inert gas, arranged coaxially to the inner region. A heat exchanger is connected to the housing at one end of the reactor. | 06-21-2012 |
20120226087 | PROCESS FOR WORKUP OF A STREAM COMPRISING BUTENE AND/OR BUTADIENE - The invention relates to a process for workup of a stream ( | 09-06-2012 |
20130131416 | PROCESS FOR PREPARING OLIGOMERS OF BUTENE - Process for preparing oligomers by continuous oligomerization of butenes, wherein
| 05-23-2013 |
20140005455 | PROCESS FOR THE CONVERSION OF OXYGENATES TO OLEFINS | 01-02-2014 |
20140005456 | CATALYST COATING AND PROCESS FOR THE CONVERSION OF OXYGENATES TO OLEFINS | 01-02-2014 |
20140171709 | REACTOR FOR CARRYING OUT AN AUTOTHERMAL GAS-PHASE DEHYDROGENATION - A reactor for gas-phase dehydrogenation of a hydrocarbon-comprising stream with an oxygen-comprising stream over a monolithic heterogeneous catalyst. Catalytically active zone(s) comprising monoliths packed next to one another and/or above one another and a mixing zone having fixed internals upstream of each catalytically active zone. Feed line(s) for the hydrocarbon-comprising gas stream to be dehydrogenated at the lower end of the reactor. Independently regulable feed line(s), which supply distributor(s), for the oxygen-comprising gas stream into each of the mixing zones and discharge line(s) for the reaction gas mixture of the autothermal gas-phase dehydrogenation at the upper end of the reactor. The interior wall of the reactor is provided with insulation. The catalytically active zone(s) is accessible from the outside of the reactor via manhole(s). The catalytically active zone(s), mixing zone, independently regulable feed line(s), and distributor(s), may be designed as one component which can individually be mounted and removed. | 06-19-2014 |
20140200379 | Process for the Oxidative Dehydrogenation of N-Butenes to Butadiene - The invention relates to a process for preparing butadiene from n-butenes, which comprises the following steps:
| 07-17-2014 |
20140243565 | PROCESS FOR PRODUCING BIOHYDROCARBONS - A process for producing biohydrocarbons, comprising the steps of | 08-28-2014 |