Abstract: The highly lithium exchanged forms of zeolite X, particularly the low silica forms of zeolite X which contain more than ninety equivalent percent lithium cations, have been found to exhibit extraordinary capacities and selectivities for nitrogen adsorption. Such adsorbents are to a surprising degree effective in separating nitrogen from gas streams such as air and mixtures of nitrogen with less polar substances such as hydrogen, argon and methane. Pressure swing adsorption separation process are well suited to take advantage of the exceptional properties of these absorbents.

Abstract: A novel crystalline aluminosilicate composition denominated "zeolite LZ-133" or simply "LZ-133" and having uniform pore dimensions of approximately 4.3 Angstroms is prepared hydrothermally from a reaction mixture containing as essential reagents, water, alkali or alkaline earth metal oxide, alumina, silica and a quaternary ammonium compound.

Abstract: The crystalline omega-type zeolite LZ-202 can be prepared by a novel process that eliminates the prior art requirement of a templating agent. Unlike prior art omega-type zeolites, the as-synthesized form is totally ion-exchangeable and can be enriched with silicon by treatment with ammonium fluorosilicate to produce a product which is substantially crystalline.

Abstract: Crystalline zeolitic aluminosilicates having at least some of its original framework aluminum atoms replaced by extraneous silicon atoms and having a mole ratio of oxides in the dehydrated state of(0.85-1.1)M.sub.2/n O: Al.sub.2 O.sub.3 : xSiO.sub.2wherein M is a cation having a valence of "n"; "x" has a value greater than 6.0; has an x-ray powder diffraction pattern having at least the d-spacings of Table A; and has extraneous silicon atoms in the crystal lattice in the form of framework SiO.sub.4 tetrahedra. These novel zeolite aluminosilicates are employed in hydrocarbon conversion processes.

Abstract: The anticariogenic activity of fluorine-containing compounds in oral compositions also containing zeolitic zinc ions is retained at advantages levels over protracted periods of time by adjusting the pH of the composition to the range of 9.5 to 11. The zeolite not only provides desired Zn.sup.++ ions to the formulation with minimal adverse affect on the active fluoride content but also is found to be an exceptionally good abrasive and/or polishing agent.

Abstract: Fibrous absorbent articles such as disposable diapers, catamenial devices, wound dressings, bandages, incontinence pads, wipes, underwear, shoe inserts and the like, contain an effective amount of crystalline, siliceous molecular sieve having pore diameters of at least about 5.5 Angstroms and a relatively low capacity for adsorbed water, and exhibit enhanced deodorizing properties with respect to the body fluids intended to be absorbed.

Abstract: Dentifrice compositions are provided having an effervescent and cleansing action. The dentifrice compositions are formed from an essentially anhydrous dentifrice base medium and an inorganic oxide material containing an adsorbed gas. Upon contact of the dentifrice composition with water, an effervescent action occurs as the gas is desorbed from the inorganic oxide material.

Abstract: Low concentrations of methanol and dimethyl ether in distillation column C.sub.4 -C.sub.5 raffinate produced in the formation of methyl tert.-alkyl ethers by the reaction of methanol with isoalkylenes are effectively removed from the residual C.sub.4 -C.sub.5 hydrocarbons by adsorption on a dual or compound adsorption bed containing silica gel as the methanol adsorbent and zeolite 13X as the dimethyl ether adsorbent.

Abstract: The process for the catalytic cracking of a crude oil feedstock to produce lower boiling hydrocarbons which comprises contacting said feedstock with a zeolitic aluminosilicate which has a mole ratio of oxide in the dehydrated state of (0.85-0.1)M.sub.2/n 0:11.sub.2 O.sub.3 : x SiO.sub.2 wherein M is a cation having a valence of "n"; x has a value greater than 6.0: having a X-ray powder diffraction pattern having at least the d-spacings of Table A; having extraneous silicon atoms in the crystal lattice in the form of framework SiO.sub.4 tetrahedra, wherein said aluminosilicate has been ion-exchanged with Group IIIA cations. In addition, the Group IIIA exchanged LZ-210 may be heated for an effective temperature and for effective time in the presence of an effective amount of steam, and/or may be ion-exchanged with a multivalent cation other than Group IIIA, e.g. rare earth, to provide catalyst compositions.

Abstract: Novel class of crystalline microporous metal aluminophosphate compositions containing as lattice constituents in addition to AlO.sub.2 and PO.sub.2 structural units, one or a mixture of two or more of the metals Mg, Mn, Co and Zn in tetrahedral coordination with oxygen atoms. These compositions are prepared hydrothermally using organic templating agents and are suitably employed as catalysts or adsorbents.

Abstract: An apparatus and process for producing attrition-resistant moving bed particles with improved efficiency.

Abstract: Odors attributable to organic molecular species are eliminated to levels below their olfactory detection level threshold by contact of the odor-producing species with a crystalline siliceous molecular sieve material having at least about 90 percent of its tetrahedral oxide units as SiO.sub.2 tetrahedra, having pore apertures nominally at least 5.5 A in diameter, from which the original water of hydration has been substantially removed, having a capacity for adsorbed water of not greater than 10 weight percent when measured at 25.degree. C. at a water vapor pressure (p/p.sub.o) of 4.6 torr.

Abstract: In the process for removing organic impurity constituents from aqueous media by adsorbing same on an organophilic molecular sieve adsorbent, followed by regeneration of the adsorbent by contact with an oxidant, such as hydrogen peroxide, whereby the organic adsorbate is converted to innocuous materials, principally CO.sub.2 and H.sub.2 O, the efficiency of the regeneration operation is found to be substantially improved by decreasing the pH of the regenerating medium and/or increasing the number of Bronsted acid sites in the molecular sieve adsorbent.

Abstract: Carbon dioxide is selectively adsorbed and separated from non-acidic gases such as nitrogen, hydrogen and methane using a pressure swing adsorption process in a fixed adsorption bed containing a faujasite type of zeolitic aluminosilicate containing at least 20 equivalent percent of at least one cation species selected from the group consisting of zinc, rare earth, hydrogen and ammonium and containing not more than 80 equivalent percent of alkali metal or alkaline earth metal cations.

Abstract: Novel class of crystalline microporous ferroaluminophosphate compositions containing as lattice constituents in addition to AlO.sub.2 and PO.sub.2 structural units, ferric and/or ferrous iron in tetrahedral coordination with oxygen atoms. These compositions are prepared hydrothermally using organic templating agents and are suitably employed as catalysts or adsorbents.

Abstract: In the process for preparing methyl tert.-alkyl ether comprising the steps of (a) contacting and reacting in the liquid phase a reaction mixture formed by combining a stream consisting essentially of C.sub.4 -C.sub.5 hydrocarbons and containing at least some proportion of isoalkylene and a stoichiometric excess of methanol, with respect to the isoalkylene, to form a reaction product comprising methyl tert.-alkyl ether, unreacted methanol and unreacted C.sub.4 -C.sub.5 hydrocarbons; (b) isolating the methyl tert.-alkyl ether from the reaction product; and (c) recovering the unreacted methanol from the residual portion of the reaction product; the improvement which comprises selectively adsorbing the methanol constituent of said residual reaction product in a bed of crystalline molecular sieve adsorbent and recovering same by desorption using as a purge-desorption stream, the C.sub.4 -C.sub.5 hydrocarbon stream used to prepare the initial reaction mixture.

Abstract: An improved liquid phase adsorption process is provided using a fixed bed system wherein the conventional post-regeneration bed-filling step and the post-adsorption bed-draining step are replaced by a displacement step. The bed volume of regeneration medium in a first bed of the system undergoing the final stage of regeneration cool-down is passed directly into a second bed of the system in the final stage of the adsorption step whereby the bed volume of void-space feedstock in said second bed is removed therefrom by displacement, thus effectively accomplishing in a single operation the filling step in the first bed and the draining step in the second bed.

Abstract: An improved method for the bulk drying of water-containing organic feedstocks by means of selective adsorption of the water in fixed molecular sieve beds wherein the improvement comprises integrating a series of at least four fixed adsorption beds in a manner such that at least two of the beds are always involved in the adsorption-drying phase of the process cycle, and at least two of the beds are always undergoing some portion of the regeneration phase in such a manner that a closed-loop non-condensible purge gas stream used to heat and to cool the beds undergoing regeneration is passed first through the bed being cooled and thereafter through the bed being heated, with the heat energy removed from the former being imparted to the latter.

Abstract: A novel crystalline aluminophosphate of the molecular sieve type, denominated AlPO.sub.4 -39, is prepared by hydrothermal synthesis from reactive sources of aluminum and phosphorus and an organic templating agent.

Abstract: A process for the separation of mannose is disclosed which comprises the selective adsorption of same on certain types of zeolitic molecular sieves. The process is especially useful for separating mannose from glucose epimerization product or plant tissue hydrolyzate, using zeolites selected from the group consisting of BaX, BaY, SrY, NaY and CaY.