Abstract: A process for preparing a silica gel bound zeolite containing catalyst by preparing an acidic silica sol and alkaline zeolite slurry feed streams, rapidly and homogeneously mixing the streams to form a rapidly gelling mixture, and spraying the mixture to produce gelled particles of catalyst.

Abstract: Titania-alumina-silica hydrosols are prepared by reacting titanium and aluminum salts with an alkaline metal silicate solution at a pH of about 3. The hydrosol compositions may be dried to form inorganic-titania-alumina-silica gels or the hydrosols may be used as inorganic binders for the preparation of catalyst compositions which may contain clay and zeolites.

Abstract: A process for modifying the silica hydrosol used to bind zeolite clay catalysts by adding salts of titania, zirconia, iron or ceria to the silica hydrosol in the course of preparation is disclosed. This addition alters the physical characteristics of catalyst when titania and zirconia salts are added and alters the matrix activity when quadrivalent cerium salts or iron salts are added to the silica hydrosol.

Abstract: An ozone decomposition system wherein moist ozone-containing gas is contacted with a bed of active zeolite molecular sieve particles for converting ozone, which comprises means for reactivating the bed by directly applying to the zeolite particles a high-voltage low-frequency electrical field having sufficient potential gradient to separate sorbed moisture as molecular water.

Abstract: A drying system wherein fluid is contacted with a bed of dielectric absorbent particles, preferably zeolite molecular sieve particles, to sorb an adsorbable component such as water, from the fluid. The improved system includes means for reactivating the moisture saturated bed by directly applying to the zeolite particles a high voltage electrical field having sufficient potential gradient (e.g., 0.2 to 500 Kv/cm) to separate substantially all of the sorbed moisture as molecular water. Direct current or low frequency (0-10.sup.3 H.sub.z) is employed. In the preferred embodiments the molecular sieve bed comprises synthetic crystalline metal alumino silicate zeolite particles such as powder having an average particle size of about 1 .mu. to 10 .mu. or larger 4 to 12 mesh bonded particles (e.g. 1000 .mu. to 5000 .mu.). The electro-desorption process is advantageous in that the amount of time and energy consumed in regenerating the bed is less than that required for conventional regeneration procedures.

Abstract: A crystalline aluminosilicate zeolite having a silica/alumina ratio of about 2 to 4 and a unique crystal structure is produced by having potassium ions and vanadia ions present in the reaction mixture.

Abstract: An improved process for preparing synthetic ferrierites having the absorption and catalytic properties characteristic of 5 to 8 angstrom zeolites which comprises promoting an alkaline reaction mixture comprising Group I and/or Group II cations, a source of silica, a source of alumina with lithium cations. The promoted reaction mixture is seeded with natural or synthetic ferrierite seeds, and heated to convert the mass to the synthetic ferrierite.The product has the empirical formula, 0.1 to 0.9 Li.sub.2 O:0.1:0.9 R.sub.2 0:Al.sub.2 O.sub.3 :6 to 25 SiO.sub.2 wherein R.sub.2 O is Na.sub.2 O, K.sub.2 O, or Rb.sub.2 O and/or Cs.sub.2 O; 0.1 to 0.9 Li.sub.2 O:0.1 to 0.9 WO:Al.sub.2 O.sub.3 :6 to 25 SiO.sub.2 wherein WO is BaO, CaO, MgO or SrO; or (Li.sub.2 O:R.sub.2 O:WO):Al.sub.2 O.sub.3 :6-25 SiO.sub.2 where R.sub.2 O is any R.sub.2 O above and WO is any WO above.

Abstract: Attrition resistant and stable catalyst composition comprising crystalline aluminosilicate zeolites e.g. rare earth exchanged zeolites dispersed in an inorganic matrix containing synthetic amorphous silica-alumina and clay are prepared by a process which reduces the level of polluting ammonium salts by eliminating the use of ammonium hydroxide in the steps prior to primary filtration. During the synthesis of the amorphous inorganic matrix wherein alkali metal silicate and aluminum salt solutions are gelled and subsequently combined with zeolitic materials, the ammonia reagent is replaced by non-polluting additives such as magnesium or calcium hydroxides (or oxides) prior to a primary filtration stage without decreasing the catalytic activity of the resulting zeolite promoted hydrocarbon conversion catalysts.

Abstract: A method of preparing zeolitic aluminosilicates particularly those zeolitic aluminosilicates that are characterized by pores in the 4 and 10A sizes that are designated Zeolites A and X by the Linde Division of Union Carbide Corporation in which compacts of the Zeolites A and X, metakaolin, clay mixture undergo crystallization at a temperature of 200.degree. to 700.degree. F. The crystallization is carried out in a calciner or other type of drying equipment. Normally the formed particles furnish all of the liquid needed for crystallization. If desired, however, additional steam may be added during the crystallization process.

Abstract: Monoliths made by joining ribbed sheet together have a tendency to collapse when the ribs of adjacent layers do not coincide. When the monolith is made by winding embossed sheet around a mandrel there will always be places where ribs do not coincide and which tend to collapse. This deficiency is minimized by using sheet with ribs having un-equal separation. Such sheet is obtained by embossing with a roll designed for this purpose, and the monoliths of this invention have unique features of channel dimensions.

Abstract: A process for preparing extrudates of alumina monohydrate having densities, surface areas and pore volumes within a predetermined range by mixing the alumina with a sufficient quantity of water to prepare an extrudable product and aging this product for a period of 1/2 to 6 hours. The alumina is then extruded and the extrudates dried using conventional techniques. The alumina is primarily used as a base for auto exhaust conversion catalysts.

Abstract: A fluid drying system comprising a molecular sieve bed of crystalline metal aluminosilicate zeolite particles for removing water from a moisture-laden process stream. The improved apparatus and methods provides means for measuring electrical conductivity of the zeolite particles and generating a signal representative of sorbed water content. Means responsive to the signal is provided for interrupting process fluid flow through the bed at a predetermined bed water content. In the preferred embodiments a high voltage is imposed across the bed for regenerating the bed to separate sorbed water from the zeolite particles.

Abstract: A process for modifying the silica hydrosol used to bind zeolite clay catalysts by adding salts of titania, zirconia, iron or ceria to the silica hydrosol in the course of preparation is disclosed. This addition alters the physical characteristics of catalyst when titania and zirconia salts are added and alters the matrix activity when quadrivalent cerium salts or iron salts are added to the silica hydrosol.

Abstract: A method for improving the light producing efficiency of gas filled electrical discharge tubes wherein a high voltage narrow pulsed ionizing potential is applied across the electrodes of the tube along with a relatively low bias potential.

Abstract: A hydrocarbon cracking process using a catalyst composition which contains a silica-magnesia or silica-magnesia-fluoride composite in combination with a substantial amount of clay. The catalyst yields desirable selectivity in combination with superior regeneration characteristics. In a preferred embodiment, the catalyst composition also contains a crystalline aluminosilicate zeolite.

Abstract: Uranium oxide or uranium and silver oxides in combination with hydrogen or rare earth oxides are exchanged into zeolites as components of zeolite cracking catalysts to increase the olefin content of the gasoline and, thus, enhance the yield of high octane components as well as reduce the coking tendency of the catalyst.

Abstract: This invention relates to an improvement in the process of preparing porous ceramic articles which are formed by blending a composition containing a polyolefin, a ceramic filler and a plasticizer; shaping the blend; extracting the plasticizer and firing the article to remove the polyolefin. The improvement comprises soaking the extracted article in a water solution of a surfactant prior to firing which results in a substantial reduction in the number of cracked pieces when firing many pieces simultaneously.

Abstract: A process for preparing dried, solid, particulate fructose products from fructose solutions by drying the solution in a current of heated air and in the presence of separately introduced recycled dried product solids.

Abstract: Certain zeolite materials have been found to be effective zeolite adsorbents-catalysts for the adsorption and conversion of sulfuric compounds to elemental sulfur. These zeolites adsorb hydrogen sulfide and sulfur oxides and promote the reaction of these materials so as to produce sulfur. These useful zeolites are the hydrogen forms of the zeolite materials and sodium exchanged hydrogen zeolites, especially mordenite. These zeolite adsorbents-catalysts are very useful for the removal of small amounts of hydrogen sulfide and sulfurous oxide from effluent streams such as effluent streams from Claus reactors.

Abstract: Faujasitic-type crystalline zeolites X and Y are produced. In one embodiment, sodium sulfide is added to the reaction mixture as a source of sodium and as a buffer. The buffering action of the sodium sulfide provides the basicity required to maintain the alumina hydrate component of the reaction mixture in solution but not a basicity whereby zeolite crystallization is retarded. In another embodiment, a nucleating mixture having the formula3-10 Na.sub.2 S: 5-15 Na.sub.2 O: 5-50 SiO.sub.2 : 0.4-4.0 Al.sub.2 O.sub.3 : 50-500 H.sub.2 Ois added to the reaction mixture to promote crystalline zeolite formation.