Patent application number | Description | Published |
20080287717 | Feedstock preparation of olefins for oligomerization to produce fuels - A feedstock containing at least 1 wt % butenes, at least 1 wt % pentenes, at least 1 wt % hexenes, at least 10 wppm C | 11-20-2008 |
20080312484 | Low Corrosion In Zeolite Oligomerisation - Water reacts on molecular sieve catalysts used in oligomerisation reactions and forms oxygenated compounds, in particular organic acids that may cause corrosion problems downstream of the reactor, in particular in distillation tower overhead systems and downstream thereof. A lowering of the presence of water in the feed prior to contacting thereof with the molecular sieve brings a significant reduction in corrosion downstream. At the same time, it has a significant beneficial effect on catalyst activity and brings a significant extension of catalyst life. Lowering water in the feed is particularly effective when organic nitrogen-containing Lewis bases are present in the feed, even at low levels. | 12-18-2008 |
20090057203 | Enhancement of saturates content in heavy hydrocarbons utilizing ultrafiltration - This invention relates to an ultrafiltration process for separating a heavy hydrocarbon stream to produce an enriched saturates content stream(s) utilizing an ultrafiltration separations process. The enriched saturates content streams can then be further processed in refinery and petrochemical processes that will benefit from the higher content of saturated hydrocarbons produced from this separations process. The invention may be utilized to separate heavy hydrocarbon feedstreams, such as whole crudes, topped crudes, synthetic crude blends, shale oils, oils derived from bitumen, oils derived from tar sands, atmospheric resids, vacuum resids, or other heavy hydrocarbon streams into enriched saturates content product streams. The invention provides an economical method for separating heavy hydrocarbon stream components by molecular species instead of molecular boiling points. | 03-05-2009 |
20090062590 | Process for separating a heavy oil feedstream into improved products - This invention relates to a process for separating a heavy hydrocarbon stream to produce at least one permeate product stream and at least one retentate product stream. The process utilizes an ultrafiltration process to designed to maximize the quality of the permeate and retenate product streams as well as process embodiments which improve permeate production quantities as well as improve the quality of the product streams obtained by the separations process. In preferred embodiments, the process includes configuration and operational parameters to maximize permeate yield and selectivity. | 03-05-2009 |
20090176643 | Sour service dewaxing catalyst without separate hydrogenation function - Catalysts for dewaxing of hydrocarbon feeds, particularly feeds with elevated sulfur and nitrogen levels, are provided. The dewaxing catalysts include a zeolite with a low silica to alumina ratio combined with a low surface binder, or alternatively the formulated catalyst has a high ratio of zeolite surface area to external surface area. | 07-09-2009 |
20090203862 | Molecular Sieve Catalyst Treatment - Treatment at elevated temperature and advantageously superatmospheric pressure with an inert gas, especially nitrogen, rejuvenates molecular sieve catalysts deactivated by use in liquid-phase or supercritical or dense-phase olefin oligomerization, or by use in aromatic alkylation. | 08-13-2009 |
20100032346 | Process for Reducing Bromine Index of Hydrocarbon Feedstock - The present invention relates to a process for reducing the Bromine Index of a hydrocarbon feedstock having at least 50 wt. % of C | 02-11-2010 |
20100179363 | Oxygenate Conversion Catalyst System And Processes For Making And Using Same - The invention includes a method for impregnating a molecular sieve primary catalyst with an aromatic co-catalyst, the method comprising contacting the small pore molecular sieve primary catalyst having a porous framework structure with a combination of from at least 50 wt % to about 99.9 wt % of an aromatic co-catalyst and from about 0.1 wt % to less than 50 wt % of a polar impregnation agent containing one or more heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur, phosphorus, and boron, under conditions sufficient to impregnate the porous framework structure of the primary catalyst with the aromatic co-catalyst (and optionally also with the polar impregnation agent), thus forming an integrated catalyst system. Methods for converting oxygenates to olefins using said integrated catalyst system are also described herein. | 07-15-2010 |
20100210886 | Production of High Purity Ethylbenzene From Non-Extracted Feed and Non-Extracted Reformate Useful Therein - A process for producing an ethylbenzene product having a purity of at least 99.50 percent based on the weight of ethylbenzene present in the product by the ethylation of the benzene present in non-extracted feed, e.g., non-extracted hydrocarbon composition. The non-extracted feed is substantially free of both C | 08-19-2010 |
20100270212 | Start Up Procedure in a Process for Purifying Aromatic Streams - A process for the purification of aromatic streams is provided that includes a new start up procedure that in embodiments significantly reduces impurities in an aromatics feedstock. | 10-28-2010 |
20100274064 | Removal of Bromine Index Contaminants from Aromatic Streams - According to the invention, trace olefins and dienes are removed from aromatic plant feedstocks by contacting the catalyst using conditions outside the ordinary range used for this application today. | 10-28-2010 |
20100274067 | Regeneration of Catalyst Used in Purification of Aromatic Streams - The invention relates to regeneration of catalysts used in the purification of aromatics streams. It has been surprisingly found that retaining small amount of coke on the catalyst reduces regeneration costs and improves regeneration effectiveness. | 10-28-2010 |
20110054128 | Controlling Prime Olefin Ratio In An Oxygenates-To-Olefins Reaction - Disclosed herein is a method of controlling production of olefins in an oxygenates-to-olefins reaction by combining in a reactor methanol and a molecular sieve, a AlPO or SAPO in certain embodiments, under conditions to produce at least ethylene and propylene having a first ethylene/propylene ratio; adding to the reactor a first amount of a C | 03-03-2011 |
20120116141 | Oligomerisation Of Olefins With Zeolite Catalyst - The conversion and run length for oligomerisation of olefins over a molecular sieve catalyst in a tubular reactor is improved by controlling the peak temperature to not exceed 50 degrees C. above the temperature of the temperature control fluid exiting the shell side outlet of the reactor. A tubular reactor containing molecular sieve catalyst is provided with a multipoint thermocouple in at least one tube, and optionally with a bottom design adapted for fast unloading of the molecular sieve catalyst from the tubular reactor. | 05-10-2012 |