Abstract: The use of compositions containing one or more oligosaccharides in an amount effective to disinfect and/or preserve medical devices, pharmaceutical preparations, and the like is described. Buffered solutions containing one or more oligosaccharide-containing compositions and methods of making and using the same are also described.

Abstract: Disclosed is a method of recovering olefin from purge streams in a polyolefin production process. The method includes reacting a purge stream containing olefin and impurities with water in the presence of a hydrating catalyst to produce an alcohol containing stream. The impurities can include methane, ethane, butylenes, and hydrogen. The alcohol containing stream can be used to produce olefins in an oxygenate to olefin production process.

Abstract: Disclosed is a method for inhibiting catalyst coke formation in the manufacture of an olefin. In particular, the method inhibits coke formation on a silicoaluminophosphate molecular sieve catalyst in the manufacture of ethylene and/or propylene. The method includes contacting an oxygenate-containing feedstock with a silicoaluminophosphate molecular sieve catalyst to form the olefin-containing product, and separating the olefin-containing product from the catalyst. An unregenerated portion of the separated catalyst is cooled before contacting with additional oxygenate feedstock to reduce coke formation on the catalyst.

Abstract: There is provided a process for converting methanol or dimethyl ether to a product containing C2 to C4 olefins, which comprises the step of contacting a feed containing methanol or dimethyl ether with a catalyst which comprises a zeolite having 10-ring intersecting channels, such as ZSM-5, and which has a Diffusion Parameter for 2,2-dimethylbutane of less than 100 sec−1 when measured at a temperature of 120° C. and a 2,2-dimethylbutane pressure of 60 torr (8 kPa). The contacting step is conducted at a temperature of 370 to 480° C., a methanol partial pressure of 30 to 150 psia and a methanol conversion per pass of less than 95%.

Abstract: A process for method for the production of olefin product from an oxygenate-containing feedstock includes exposing a silicoaluminophosphate catalyst to an oxygenate-containing feedstock in a reaction zone under conditions effective to convert the oxygenate-containing feedstock to an olefin product, by stripping at least a portion of the exposed catalyst with a stripping gas; and returning at least a portion of the stripped catalyst directly to the reaction zone.

Abstract: Disclosed is a method of recovering olefin from purge streams in a polyolefin production process. The method includes reacting a purge stream containing olefin and impurities with water in the presence of a hydrating catalyst to produce an alcohol containing stream. The impurities can include methane, ethane, butylenes, and hydrogen. The alcohol containing stream can be used to produce olefins in an oxygenate to olefin production process.

Abstract: Disclosed is a method for recovering olefin in an oxygenate to olefin production process. The method includes reacting a stream containing olefin with water in the presence of a hydrating catalyst to produce an alcohol containing stream. The alcohol containing stream can be used as an oxygenate feed in the oxygenate to olefin production process.

Abstract: Disclosed is a method of purifying olefin containing oxygenate contaminants. The method incorporates the use of extractive distillation. Under the appropriate conditions, olefins containing very low levels of oxygenate contaminants can be recovered.

Abstract: The present invention provides a method for converting a feed containing oxygenates to olefins and comprises the following steps: providing a feed including an oxygenate; contacting the feed in a reactor apparatus with a catalyst including a molecular sieve, the contacting taking place under conditions effective to convert the oxygenate to a product including a light olefin, the conditions including a gas superficial velocity of at least two meters per second at least one point in the reaction zone; and recirculating a first portion of the catalyst to recontact the feed.

Abstract: Disclosed is a catalytic method for operating an oxygenate to olefins conversion reaction to provide a substantial quantity of prime olefin in the product. The product is provided by operating within desired parameters of weight hourly space velocity and oxygenate partial pressure. Operating the reaction to supply oxygenate at an oxygenate proportion index of at least 0.5, and controlling weight hourly space velocity and molar flow rate of oxygenate to the reactor to maintain a partial pressure-velocity compensation factor of at least 0.1 psia−1hr−1, a prime olefin selectivity of at least 45 wt. % can be maintained.

Abstract: A process for increasing the ethylene selectivity of a silicoaluminophosphate molecular sieve catalyst by using acetone in an oxygenate conversion process. Acetone can be added with the oxygenate feed at a concentration from about 1% to about 15% by weight, preferably about 1% to about 8% by weight, more preferably about 2% to about 5% by weight. Alternatively, acetone can be added as a pre-feed to the molecular sieve catalyst, particularly regenerated and fresh catalyst, in an contact zone. The pre-feed contacted catalyst is then directed to an oxygenate conversion zone. The acetone concentration in the pre-feed is from about 1% to about 99% by weight, preferably about 30% to about 70% by weight.

Abstract: An improved method for the production of methanol and hydrocarbons from a methane-containing gas, such as natural gas. The improved method integrates a hydrocarbon synthesis unit with a methanol synthesis unit. The invention combines a syngas stream from a steam reformer, a syngas stream from an oxidation reformer and additional carbon dioxide to form an optimal syngas composition that is directed to a methanol synthesis reactor. The invention also integrates other process parameters and process components of a methanol and hydrocarbon synthesis process plant to effectively convert most of the carbon in the natural gas to commercial-value products. The invention is also directed to a method of making olefin from the methanol produced by the process of the invention.

Abstract: A method for converting oxygenates to light olefins.

Abstract: A method for increasing light olefin yield during conversion of oxygenates to olefins comprising: contacting an oxygenate feed in a primary reactor with a non-zeolitic molecular sieve catalyst under conditions effective to produce a first product comprising light olefins; separating the first product into light olefins and a heavy hydrocarbon fraction; feeding the heavy hydrocarbon fraction either back into the primary reactor or to a separate auxiliary reactor; and, subjecting the heavy hydrocarbon fraction to conditions effective to convert at least a portion of the heavy hydrocarbons to light olefins.

Abstract: A method for converting heavy olefins present in a product stream exiting a first reaction zone into light olefins and carbonaceous deposits on a catalyst without separation of the heavy olefins from the product stream exiting the first reaction zone. The method comprises creating the product stream exiting the first reaction zone, the product stream exiting the first reaction zone comprising the heavy olefins, moving the product stream exiting the first reaction zone to a second reaction zone without separation of the heavy olefins from the product stream exiting the first reaction zone, and contacting the product stream exiting the first reaction zone with the catalyst under conditions effective to form the light olefins, the contacting causing the carbonaceous deposits to form on at least a portion of the catalyst.

Abstract: The invention provides a method of making ethylene, propylene, and butylene by contacting a molecular sieve catalyst with an oxygenate to convert a portion of the oxygenate to a product containing olefin; separating the catalyst from the olefin product and directing a portion of the separated catalyst to a regenerator; contacting, in an alcohol contact zone, the regenerated catalyst with an alcohol selected from methanol, ethanol, 1-propanol, 1-butanol, or mixtures thereof; and directing the catalyst from the alcohol contact zone to an oxygenate conversion zone. The relative amounts of ethylene, prtoplyene, and butylene produced by the process is in part dependant upon the composition of the alcohol used to contact the regenerated catalyst.

Abstract: Disclosed is a method for making olefin product from an oxygenate-containing feedstock. In the method, a silicoaluminophosphate molecular sieve catalyst is contacted with the oxygenate-containing feedstock in a reactor at an average catalyst feedstock exposure index of at least 1.0. The method produces lower coke yield and provides an olefin product which is low in C1-C4 paraffin content. The invention is particularly effective in producing an olefin product having a very low propane content.

Abstract: Alkyl aromatic compounds are converted to alkyl aromatic aldehydes by a carbonylation reaction. The carbonylation catalyst can be a high boiling point carbonylation catalyst which allows for the separation of the aldehyde product by selective volatilization. Alternatively, the carbonylation catalyst can be selected from perfluoroalkyl sulfonic acids having 2 to 18 carbon atoms, perfluoroether sulfonic acids having 2 to 18 carbon atoms, BF3(ROH)x wherein R represents CH3 or H and X is a number within the range of from 0.2 to 2, GaBr3, GaCl3, TaF5, NbF5, and NbBr5, with the proviso that when the catalyst is TaF5, NbF5, or NbBr5, then the reaction takes place in the absence of added HF. Preferably, all of the carbonylation reactions take place in the absence of added HF. The alkyl aromatic aldehydes can be oxidized to form an aromatic acid.