Abstract: The present invention relates to methods for selectively converting oxygenates to light olefins, preferably ethylene and propylene, in which desirable carbonaceous deposits are maintained on a total reaction volume of catalyst by totally regenerating only a portion of the total reaction volume of catalyst and mixing the regenerated portion with the unregenerated total reaction volume of catalyst.

Abstract: A method for modifying a molecular sieve catalyst to reduce methane production during conversion of oxygenates to olefins. The molecular sieve catalyst comprises a separately synthesized framework comprising a material selected from the group consisting of silica, alumina, phosphate, and combinations thereof. The framework is contacted with a modifier, in the absence of a salt comprising a metal selected from the group consisting of manganese, zirconium, and hafnium, under conditions effective to modify the framework but insufficient to dealuminize or deironize the framework. The modifier comprises an oxygenated chelating agent comprising a parent compound which is readily removable from the framework by calcination to leave the modified molecular sieve catalyst. Also encompassed are the modified molecular sieve catalysts produced by the method, and a method of using the modified molecular sieve catalysts to reduce methane production during conversion of oxygenates to olefins.

Abstract: The present invention is directed to a catalyst composition comprising a non-zeolitic molecular sieve and one or more alkaline earth metals selected from the group consisting of strontium, calcium, barium, and mixtures thereof, wherein said non-zeolitic molecular sieve has a pore diameter size of less than about 5 Angstroms.

Abstract: A method for fluorinating molecular sieve catalysts to increase selectivity to ethylene during conversion of oxygenates to olefins, fluorinated catalysts produced by such method, and methods of using the fluorinated molecular sieve catalysts to increase selectivity to ethylene during conversion of oxygenates to olefins.

Abstract: A process for the modification of a small pore molecular sieve catalyst to increase its selectivity to ethylene in the production of light olefins from oxygenated compounds, particularly methanol. The catalyst is modified with phosphorus by incorporating a phosphonitrilic oligomer with the catalyst, and then calcining the catalyst at temperature sufficient to decompose the phosphonitrilic oligomer, and deposit from about 0.001 wt. % to about 50 wt. % phosphorus on the catalyst. This modification provides a novel composition in that it increases the ethylene selectivity of the catalyst in the production of light olefins from oxygenates as contrasted with a small pore molecular sieve catalyst otherwise similar except that it has not been so treated and modified with the phosphonitrilic oligomer.

Abstract: The present invention provides a method for the conversion of oxygenates to olefins comprising exposing said oxygenates to a catalytic coating comprising a non-zeolitic molecular sieve catalyst coated on a support comprising inorganic materials, wherein said catalyst comprises in the range of from at least about 5 wt % of said support, under conditions effective to convert said oxygenates to olefins.

Abstract: The present invention relates to a one-step method for catalytically reforming methanol with water to produce hydrogen and carbon dioxide using catalysts which do not contain copper oxide and/or chromium oxide, which produce only negligible amounts of carbon monoxide, and which are not rapidly deactivated.

Abstract: Inhibition of popcorn polymer growth by treatment with heat. Heat can be applied to extant popcorn polymer, particularly in the absence of organic material from which the popcorn polymer is formed. A chemical inhibitor of popcorn polymerization can be used in conjunction with the heat treatment.

Abstract: Inhibition of popcorn polymer growth by treatment with a sulfur-containing compound. The sulfur-containing compound can be added to organic material from which popcorn polymer is formed, or applied to extant popcorn polymer.

Abstract: Inhibition of popcorn polymer growth by treatment with a sulfur-containing compound. The sulfur-containing compound can be added to organic material from which popcorn polymer is formed, or applied to extant popcorn polymer.

Abstract: Inhibition of popcorn polymer growth by treatment with an alkyl halide. This compound can be admixed with organic material from which popcorn polymer is formed, or added to a system for the recovery, use or storage of such organic material.

Abstract: Inhibition of popcorn polymer growth by treatment with an inorganic acid ester. This compound can be admixed with organic material from which popcorn polymer is formed, or added to a system for the recovery, use or storage of such organic material.

Abstract: Inhibition of popcorn polymer growth by treatment with a compound including a Group IV element, and at least one hydrogen bonded to the Group IV element. This compound can be admixed with organic material from which popcorn polymer is formed, or added to a system for the recovery, use or storage of such organic material.

Abstract: Discrete, non-agglomerating particles of polyalkylene carbonate are produced by solvent/non-solvent precipitation using certain solvent/non-solvent systems. The free-flowing particles obtained are from 30 to 3000 microns in diameter and are suitable for use in a variety of applications, particularly the preparation of foamed articles.

Abstract: Discrete, non-agglomerating particles of polyalkylene carbonate are produced by solvent/non-solvent precipitation using certain solvent/non-solvent systems. The free-flowing particles obtaine are from 30 to 3000 microns in diameter and are suitable for use in a variety of applications, particularly the preparation of foamed articles.

Abstract: The selection of the proper solvent systems for polyalkylene carbonates which completely dissolve the polymer at high temperatures but are non-solvents at lower temperatures allows one to obtain discrete particles of the polymers suitable for many applications, processing and handling. The particles size can be controlled from about 30 to about 3000 microns in diameter.

Abstract: The addition of a small amount of a second epoxide to the copolymerization of ethylene oxide or propylene oxide with carbon dioxide can give a melt processable polyalkylene carbonate terpolymer which can be processed without extensive thermal decomposition. This invention has particular utility in thermoplastic applications such as injection molding, blow molding, and film manufacture.

Abstract: Copolymers or terpolymers of carbon dioxide and at least one epoxide are found to be useful in formulations for adhesive compositions. Polarity due to the carbonate group and non-polarity due to the alkylene groups in the resulting polyalkylene carbonates makes it possible to adhere a large number of different surfaces such as steel, aluminum, fluoropolymers, and polyesters to themselves or to each other.

Abstract: The catalyst efficiency of zinc carboxylate catalyst in the copolymerization of alkylene oxides with carbon dioxide to form polycarbonates has been increased by the addition of a small amount of certain diepoxides to the reaction.

Abstract: Catalysts which are soluble in a variety of solvents are prepared by reacting zinc compounds with anhydrides in the presence of an alcohol or by reacting zinc salts with a monoester of a dicarboxylic acid. These catalysts can be added as a solution to a mixture of epoxides and carbon dioxide to prepare polyalkylene carbonates.