Abstract: The present invention relates to a process for preparing zeolite crystals having a multimodal particle size distribution, and the sizes of which are between 0.02 ?m and 20 ?m, said process comprising feeding at least two reactors each with a synthesis gel capable of forming zeolite crystals, carrying out a crystallization reaction, in parallel, in each of the at least two reactors, and mixing the reaction media of the at least two reactors, after the start of at least one of the crystallization reactions.

Abstract: The present invention relates to a process for preparing zeolite crystals having a multimodal particle size distribution, and the sizes of which are between 0.02 ?m and 20 ?m, said process comprising a first introduction of one or more seeding agents into the tubular reactor or upstream of the tubular reactor, and at least one second introduction of one or more, identical or different, seeding agents into the tubular reactor.

Abstract: One aspect of the present invention relates to mesostructured zeolites. The invention also relates to a method of preparing mesostructured zeolites, as well as using them as cracking catalysts for organic compounds and degradation catalysts for polymers.

Abstract: The present invention relates to a method for preparing composites of substrate-molecular sieve, in particular, to a method for preparing a composite of substrate-molecular sieve, which comprises applying a physical pressure to molecular sieve crystals against a substrate to form a chemical bond between the molecular sieve crystal and the substrate. The present invention requiring no solvents, reactors and other equipments enables molecular sieve crystals to be stably attached to the surface of substrates through various chemical bonds, particularly ionic present invention ensures the synthesis of substrate-molecular sieve composites with enhanced attachment rate, degree of lateral close packing (DCP) and attachment strength in more time-saving and energy-saving manners. The present method works well for molecular sieve crystals with lager sizes (e.g., more than 3 ?m) with no generation of parasitic crystals.

Abstract: Methods for removing surfactants from polar solids are described herein. In particular, various embodiments described herein relate to the removal of surfactants from polar solids that involves contacting a surfactant-containing porous polar solid with an extraction agent comprising water, a salt, and, optionally, a polar organic compound. In certain embodiments described herein, the extraction agents are used to remove surfactants from a mesoporous zeolite.

Abstract: Disclosed is a new thermoelectric conversion material represented by the chemical formula 1: Bi1-xCu1-yO1-zTe, where 0?x<1, 0?y<1, 0?z<1 and x+y+z>0. A thermoelectric conversion device using said thermoelectric conversion material has good energy conversion efficiency.

Abstract: One aspect of the present invention relates to mesostructured zeolites. The invention also relates to a method of preparing mesostructured zeolites, as well as using them as cracking catalysts for organic compounds and degradation catalysts for polymers.

Abstract: This invention relates to the composition and synthesis of an Extra Mesoporous Y (or “EMY”) zeolite and its use in the catalytic conversion of organic compounds. In particular, this invention relates to a Y-type framework zeolite possessing a high large mesopore pore volume to small mesopore pore volume ratio. The novel zeolite obtained provides beneficial structural features for use in petroleum refining and petrochemical processes.

Abstract: A titanium silicate variant named UPRM-5 was prepared using tetraethylammonium hydroxide as a structure-directing agent (SDA). Successful detemplation was achieved via ion exchange with NH4Cl. Effective functionalization was obtained after ion exchanging the detemplated material using SrCl2 and BaCl2. Adsorption of CO2 at 25° C. in Sr- and Ba-UPRM-5 materials activated at different temperatures. For low partial pressures, the observed CO2 adsorption capacities increased as follows: NH4-UPRM-5<Sr-UPRM-5<Ba-UPRM-5. Both the Sr- and Ba-UPRM-5 materials exhibited outstanding selectivity for CO2 over CH4, N2 and O2.

Abstract: The present invention relates generally to zeolites having a silica/alumina ratio of less than or equal to 10 (Si/Al?10) that are exchanged with Ag+ and thermally treated in such a way to favor adsorption over alternative catalytic and chemically reactive functionalities. The adsorbents of the present invention and the method of producing such adsorbents maximize the working adsorption capacity through ?-complexation. Applications for such adsorbents include any process in which contaminants from gas streams can form ?-complexes with the Ag in the zeolite, particularly the removal of CO, ethylene, propylene and the like from air and CO/H2 from air in prepurifier adsorbers in the production of ultra high purity (UHP) N2.

Abstract: Disclosed is a new thermoelectric conversion material represented by the chemical formula 1: Bi1-xCu1-yO1-zTe, where 0?x<1, 0?y<1, 0?z<1 and x+y+z>0. A thermoelectric conversion device using said thermoelectric conversion material has good energy conversion efficiency.

Abstract: A zeolite membrane production apparatus is provided having a reaction container having a support insertion opening for insertion of tubular supports and which houses a reaction solution for formation of zeolite membranes on the surfaces of the supports, a heating means for heating the reaction solution through the reaction container, and a supporting apparatus provided on the reaction container in a freely detachable manner and which supports a plurality of the supports. The inner wall surface of the reaction container has two mutually parallel flat surfaces, the supporting apparatus has a plurality of supporting sections that anchor one end of each of the plurality of supports, and the plurality of supporting sections are provided in the supporting apparatus such that when the supporting apparatus is set in the reaction container, each of the plurality of supports is disposed between the two flat surfaces and parallel to the two flat surfaces.

Abstract: A carbon-based combustion catalyst is obtained by calcining sodalite at a temperature of 600° C. or more. Alternatively, a carbon-based combustion catalyst is obtained by performing the following mixing step, drying step, and calcination step. In the mixing step, aluminosilicate (sodalite), and an alkali metal source, and/or an alkaline earth metal source are mixed in water to obtain a liquid mixture. In the drying step, the liquid mixture is heated to evaporate the water, thereby obtaining a solid. In the calcination step, the solid is calcined at a temperature of 600° C. or more so that a part or all of the sodalite structure is changed. The thus-obtained catalyst can cause carbon-based material to be stably burned and removed at a low temperature for a long time.

Abstract: A quantity of solution sufficient to dissolve a pH controlling substance and/or substantially dissolve a surfactant without substantial excess solution is controlled under a set of time and temperature conditions to transform an inorganic material having long-range crystallinity to a mesostructure having long-range crystallinity. The method employs concentrated conditions that have a consistency similar to a thick slurry. The economic viability of scaling up such thick slurry methods is improved relative to prior more dilute methods of transforming an inorganic material to a mesostructure.

Abstract: Molecular sieves are prepared by forming a reaction mixture slurry, spray drying the reaction mixture slurry to form particles, and heating the spray dried reaction mixture at a temperature and pressure sufficient to cause crystallization of the molecular sieve. The reaction mixture contains an organic templating agent capable of forming the molecular sieve. The template may be added to the reaction mixture either by adding all of the template prior to spray drying, or by adding a portion of the template prior to spray drying with the remainder being added after spray drying.

Abstract: Process for the preparation of a crystalline solid comprising at least one zeolitic material, in which the solid is crystallized from at least one precursor compound and the reaction discharge of the crystallization is fed directly to a drying stage.

Abstract: The invention concerns a zeolite with structure type MTT comprising MTT zeolite crystals with a size of less than 5 &mgr;m, at least a portion of the MTT zeolite crystals being in the form of MTT zeolite crystal aggregates, said zeolite being characterized in that the granulometry of the aggregates is such that the dimension Dv,90 is in the range 40 nm to 100 &mgr;m. The invention also concerns the preparation of the zeolite and the use of the zeolite as a catalyst in a process for converting hydrocarbon feeds, and in particular in a process for isomerizing straight chain paraffins.

Abstract: An improved method for preparing monolith adsorbents and activating the adsorbents therein is disclosed. A mixture of lower temperature and higher temperature binders is used in fabricating the paper used to form the monolith structure. The finished monolith structure is heated to a temperature sufficient to remove the lower temperature binder while leaving the higher temperature binder to maintain integrity in the monolith.

Abstract: This invention relates to a process for producing zeolite-bound high silica zeolites and the use of the zeolite-bound high silica zeolite produced by the process for hydrocarbon conversion. The process is carried out by forming an extrudable paste comprising a mixture of high silica zeolite in the hydrogen form, water, silica, and optionally an extrusion aid, extruding the extrudable paste to form silica-bound high silica zeolite extrudates, and then converting the silica of the binder to a zeolite binder. The zeolite-bound high silica zeolite produced by the process comprises high silica zeolite crystals that are bound together by zeolite binder crystals. The zeolite-bound high silica zeolite finds particular application in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, isomerization, and transalkylation reactions.

Abstract: The invention concerns a zeolite with structure type EUO comprising EUO zeolite crystals with a size of less than 5 &mgr;m, at least a portion of the EUO zeolite crystals being in the form of EUO zeolite aggregates, characterized in that the granulometry of the aggregates is such that Dv,90 is 500 &mgr;m or less. The invention also concerns the preparation of the zeolite and the use of the zeolite as a catalyst, for example in a process for isomerising aromatic compounds containing 8 carbon atoms per molecule.

Abstract: The present invention discloses a method for forming hard mask of half critical dimension on a substrate. A substrate is provided for the base of integrated circuits. A silicon oxide layer is formed on the substrate. A photoresist layer is formed on the silicon oxide layer and it is has a critical dimension, which the conventional lithography process can make. Subsequently, a hard mask of half critical dimension is formed in the silicon oxide layer by using the photoresist layer as an etching mask. After the oxide hard mask is formed, the gate structure of half critical dimension is formed by using the oxide hard mask.

Abstract: A method of manufacturing crystalline microporous material suitable for manufacturing a variety of crystalline microporous material under mild reaction conditions and under safe working environmental conditions by using simple installation. The crystalline microporous materials obtained by the present invention may be used as adsorbent agent, catalyst or separating material. According to the characterizing features of the manufacturing method of the present invention, there are provided a method of using cation compound or amine as crystallizing modifier and using, in combination, raw material including canemite or silicon dioxide and a further method using raw material including silicon dioxide and aluminum salt. The method includes a step of mixing these components, a solid-liquid separating step for separating produced fine particles, and a crystallizing step for crystallizing the separated solid component.

Abstract: Applicants have developed a continuous process for synthesizing various molecular sieves. The process enables one to control both the particle size and particle size distribution. Any of the molecular sieves represented by the empirical formula on an anhydrous basis: rR.sub.2 O:(Si.sub.x Al.sub.y P.sub.z)O.sub.2, where R is at least one templating agent, "r" "x" "y" and "z" are the mole fractions of R, Si, Al and P respectively, can be prepared using this process. The process involves continuously adding reactive sources of the desired components along with a structure directing agent into a continuous crystallization reactor. Either interstage backmixing is introduced or the number of stages is adjusted in order to control particle size. Finally, one way to control particle size distribution is to split the product stream into at least two streams and flowing each stream to a wet miller operated at different severity and then reblending to obtain at least a bimodal distribution.

Abstract: A method for distributing a zeolite, including molecular sieve, powder having a median particle size of less than about 350 microns includes controlling the moisture content of the zeolite particles to greater than about 3 percent and thereafter refining the powder to reduce the size of agglomerated clusters.

Abstract: A layered composition of matter, MCM-56, has an X-ray diffraction pattern including lines at d-spacing values of 12.4.+-.0.2, 9.9.+-.0.3, 6.9.+-.0.1, 6.2.+-.0.1, 3.55.+-.0.07 and 3.42.+-.0.07 Angstroms and has been selectively modified so that the ratio of the number of active acid sites at its external surface to the number of internal active acid sites is greater than that of the unmodified material. When used as an additive to a large pore zeolite catalyst in the catalytic cracking of a petroleum feedstock, the modified MCM-56 gives an improved gasoline yield/octane relationship, an improved coke selectivity and a higher combined gasoline and potential alkylate yield than an identical catalyst containing unmodified MCM-56.

Abstract: The modified zeolite beta has a surface area based upon the crystalline structure of the zeolite beta of at least 600 m.sup.2 /g and a sodium content in the crystalline structure of the zeolite beta of less than 0.04 wt % Na.sub.2 O.A process for modifying an alkali metal containing zeolite beta synthesized by the hydrothermal digestion of a reaction mixture containing an organic templating agent. The as synthesized zeolite beta is treated with an ion exchange medium then calcined at a temperature within the range of 400.degree.-700.degree. C. for a period of two hours or longer. The calcined zeolite beta is again treated with an ion exchange medium to protonate additional active sites by exchanging alkali metal ions. The ion exchanged zeolite from this step is mixed with a binder to produce a mulled zeolite-binder mixture pelletized by extrusion.

Abstract: The invention describes a process for thermal activation of zeolites that are sensitive to hydrothermal degradation by percolating a hot gas through a homogeneous bed of granulates of the said zeolites. It applies to type A an X zeolites, and more particularly to their forms exchanged by potassium or calcium and one preferably uses air, the temperature of which ranges between about 300.degree. C. and 700.degree. C., preferably between 550.degree. C. and 600.degree. C., and preferably with dehydrated and decarbonated air, forced through the bed of granulates at linear velocities ranging between 0.01 and 1 m/second NTP. The process makes it possible to obtain novel zeolites with high nitrogen adsorption capacity.

Abstract: Disclosed is a process for the preparation of an anorthite sintered body, which comprises preparing a formed body of at least one powder selected from the group consisting of (i) a calcium type zeolite having an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio lower than 3, (ii) an amorphous calcination product obtained by calcining said calcium type zeolite and (iii) a mixture of said calcium type zeolite or said amorphous calcination product and an alkaline earth metal compound, and sintering the formed body at a temperature lower than 1000.degree. C.