| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 585659000 | Plural stages or with catalyst movement | 12 |
| 20080300440 | Method For Catalytically Dehydrating Propane To Form Propylene - The invention relates to a method for producing propylene during which a first gas mixture, which is technically free of oxygen but contains propane, water vapor and hydrogen, and which has a temperature of at least 400° C., is led into a reaction device having at least one catalyst bed as well as usual dehydration conditions. Another gas mixture, which contains propane and oxygen and which can also contain ammonia, the propane content exceeding the oxygen content, is led into the same reaction device in which it reacts with the first gas mixture while forming propylene, water vapor and hydrogen, and the formed gas mixture containing propylene, water vapor and hydrogen is drawn out of the reaction device. | 12-04-2008 |
| 20090012341 | Dehydrogenation Reactions in Narrow Reaction Chambers and Integrated Reactors - Methods of dehydrogenating hydrocarbons to yield unsaturated compounds are described. Reactor configurations useful for dehydrogenation are also described. Hydrocarbons can dehydrogenationed, for relatively long periods of time-on-stream, in a reaction chamber having a dimension of 2 mm or less to produce H | 01-08-2009 |
| 20100152516 | Moving Bed Hydrocarbon Conversion Process - Moving bed hydrocarbon conversion processes are provided for contacting a catalyst moving downward through a reaction zone with a hydrocarbon feed, withdrawing the catalyst from the reaction zone and conveying the catalyst to a regeneration zone wherein the catalyst moves downward. The catalyst is withdrawn from the regeneration zone and passed downward to an upper zone of a particle transfer apparatus wherein the transfer of catalyst from the upper zone through an intermediate zone to a lower zone is regulated by varying the pressure of the intermediate zone and the flow rate of gas passing through the valveless conduits. A body within the lower zone is in catalyst communication with a valveless conduit and provides more consistent catalyst flows. The catalyst from the lower zone of the particle transfer apparatus is conveyed to the reactions zone. | 06-17-2010 |
| 20100234660 | REGENERATION OF CATALYSTS FOR DEHYDRATING ALKANES - The invention relates to a method for dehydrating alkanes, wherein the alkane is guided in a reactor for the dehydrogenation of alkanes via a catalyst, and the process may be carried out adiabatically or non-adiabatically, and the catalyst for dehydration can be regenerated after the reaction phase by means of transferring a gas, wherein said gas is guided via the catalyst after a short rinsing phase using water vapor, and said regeneration gas consists of a gas containing oxygen and of steam, and after regeneration the catalyst is freed of the gas containing oxygen by transferring steam, wherein the duration of the transfer of a gas containing oxygen is significantly reduced as compared to common methods and represents 70% or less of the total regeneration time, and the catalyst has an increased selectivity for forming alkene by means of carrying out the regeneration at a constant activity, and the catalyst is comprised of a metal of the group of platinum metals or group VIB of the periodic table of the elements, which is applied to a carrier in form of a compound or in elementary form, which substantially consists of oxides of the elements of tin, zinc, or aluminum. | 09-16-2010 |
| 20100240941 | New Catalyst for Higher Production Rates in Hydrocarbon Dehydrogenation - A process is presented for the dehydrogenation of hydrocarbons in a radial flow reactor. The process includes the continuous feeding of catalyst into the reactor and the continuous withdrawal of catalyst from the reactor, where the catalyst is modified to increase the increased density. The catalyst is a layered structure with a dense core and an active catalytic outer layer. | 09-23-2010 |
| 20110137101 | Process for the Production of Propylene - A process for catalyst regeneration is presented. The process regenerates a catalyst in a paraffin dehydrogenation process, where the reaction is endothermic. The regeneration process provides the heat for the process through heating the catalyst and removes the need for a charge heater to the dehydrogenation reactor, which in turn eliminates high temperature thermal residence time which eliminates thermal cracking of the feed and improves the overall product selectivity. In addition, plot area, equipment costs and operating complexity are reduced. | 06-09-2011 |
| 20110319692 | Method for Quenching Paraffin Dehydrogenation Reaction in Counter-Current Reactor - A process is presented for quenching a process stream in a paraffin dehydrogenation process. The process comprises cooling a propane dehydrogenation stream during the hot residence time after the process stream leaves the catalytic bed reactor section. The process includes cooling and compressing the product stream, taking a portion of the product stream and passing the portion of the product stream to the mix with the process stream as it leaves the catalytic bed reactor section. | 12-29-2011 |
| 20140142362 | Counter-Current Fluidized Bed Reactor for the Dehydrogenation of Olefins - A process and apparatus for the dehydrogenation of paraffins is presented. The process utilizes a reactor that includes a slower flow of catalyst through the reactor, with a counter current flow of gas through the catalyst bed. The catalyst is regenerated and distributed over the top of the catalyst bed, and travels through the bed with the aid of reactor internals to limit backmixing of the catalyst. | 05-22-2014 |
| 20150038757 | METHOD FOR QUENCHING PARAFFIN DEHYDROGENATION REACTION IN COUNTER-CURRENT REACTOR - A process is presented for quenching a process stream in a paraffin dehydrogenation process. The process comprises cooling a propane dehydrogenation stream during the hot residence time after the process stream leaves the catalytic bed reactor section. The process includes cooling and compressing the product stream, taking a portion of the product stream and passing the portion of the product stream to the mix with the process stream as it leaves the catalytic bed reactor section. | 02-05-2015 |
| 20160090337 | PARAFFIN DEHYDROGENATION WITH OXIDATIVE REHEAT - A process is presented for the dehydrogenation of paraffins. The process utilizes the combustion of a fuel within the dehydrogenation reactor to provide the heat of reaction for dehydrogenation. The process controls the combustion through limiting the oxidant concentration. A paraffin feedstream is mixed with a fuel, and the fuel/paraffin feedstream is mixed with an oxidant stream at the inlet of each dehydrogenation reactor. | 03-31-2016 |
| 20160122263 | METHODS FOR ALKANE DEHYDROGENATION - Disclosed herein are methods for dehydrogenation of alkanes to olefins by co-injecting the alkane feed with hydrogen. The present methods provide the improved feed conversion, desired product selectivity, total olefins in product stream, and lower catalyst deactivation rate. | 05-05-2016 |
| 20160376208 | Method of Producing Higher Value Hydrocarbons by Isothermal Oxidative Coupling of Methane - A method for producing olefins comprising (a) introducing to an isothermal reactor a reactant mixture comprising CH | 12-29-2016 |
