Abstract: Hydrotalcite-like contact materials are stable in the crystalline oxide structure and essentially reversible in anion exchange. Large crystalline sheet materials having increased sorption of SO.sub.X are provided by incorporation of certain organic acid anionic species to modify the hydrotalcite/brucite structure. Typical industrial applications include sulfur removal from fluid catalyst cracking process, cold-side combustion gas sulfur abatement and cleaner coal gasification.

Abstract: Hydrotalcite-like materials are stable in the crystalline oxide structure and essentially reversible in anion exchange. A novel process of sulfur oxide sorption is provided utilizing these hydrotalcite materials as contact solids. Large crystalline sheet materials having increased sorption of SO.sub.x are provided by incorporation of certain organic acid anionic species to modify the hydrotalcite/brucite structure. Typical industrial applications include sulfur removal from fluid catalyst cracking process, cold-side combustion gas sulfur abatement and cleaner coal gasification.

Abstract: A novel biaxially oriented polystrene sheet product and process for making the sheet. Oriented polystyrene sheet is prepared by melt extruding a polymer, such as styrenic resin having average molecular weight of at least 270,000, blended with a processing agent, such as mineral oil, to lower glass transition temperature of the resin by at least 10.degree. C. The cooled extruded sheet is biaxially oriented under reduced orientation load conditions and orientation temperature. In a preferred embodiment styrenic resin is blended with about 3-10 wt % paraffinic hydrocarbon oil, such as mineral white oil or the like, in the substantial absence of other additives to provide a clear, oriented polystyrene sheet product having high modulus and low haze.

Abstract: A process for solvent dewaxing petroleum feedstock to separate crystallized wax from lubricant oil by filtration of a wax/oil/solvent mixture. The feedstock is sequentially cooled and mixed with cold polar solvent to form a wax crystal phase and oil-solvent phase, and-the oil-solvent filtrate stream is contacted with solvent permeable selective membrane at low temperature to recover an internal circulating permeate solvent stream and an oil-rich retentate stream containing dewaxed oil product and residual solvent. Improved operation is achieved by splitting the internal circulating solvent stream into a multiple cold solvent recycle streams and injecting a plurality of the cold solvent recycle streams into the waxy petroleum feedstock during sequential cooling and mixing. By initially injecting a cold recycle solvent stream in to the waxy petroleum feedstock at a small temperature differential near the wax crystallization temperature, shock cooling and excess small wax crystal formation is avoided.

Abstract: Plastic-film zipper bags having tubular plastic end stops bonded to the plastic zipper to seal the ends of the zipper and to provide stops to retain a slider on the zipper are disclosed. Also disclosed is a method of installing the tubular plastic end stops on the zipper.

Abstract: The invention involves a system for bag pack support, easy dispensing, loading and removal of grocery bags involving a pack of bags and a rack suitable for the dispensing of the bags. The pack includes a plurality of undershirt type bags having integrally extended double-loop handles in the bag mouth. Each bag mouth is distinguished by being free of any suspension tabs. Thus, in bag pack form there is no "header". Suspension orifices are located in the handles of the bags. The pack of bags is employed with a rack which includes a pair of spaced parallel cantilevered rods having free ends. The bag pack is threaded onto the support rods by means of the support orifices. The rack includes a restraining means adapted to engage at least some of the bags of the pack so as to at least inhibit any significant forward movement of the pack as individual bags are loaded and removed from the rack. Means are included with the bag pack to secure the plurality of bags in a registered condition.

Abstract: A plastic clip is located at each end of a plastic zipper of a thermoplastic bag and fused with the ends of the profile elements of the zipper into a single mass by melting the clip to the zipper material.

Abstract: A plastic zipper slider having hinged wings is provided with an improved latch tongue which is deflected downward to snap in place. Additional flexible latch web structure cooperates with the latch tongue to provide additional forces which are active in assuring that the wings are fully latched and to also provide additional resistance to unlatching the wings.

Abstract: A plastic reclosable fastener with slider particularly suited for plastic bags and the like wherein the reclosable fastener is provided with structure located below the interlocking elements of the fastener which when engaged by the slider controls the opening and closing of the interlocking elements of the fastener.

Abstract: A leakproof plastic zipper with integrated end stops for a zipper slider particularly suited for thermoplastic bags. An increased flange height above the interlocking elements of the zipper and an increased plow depth on the separator of the slider extending down between the flanges provide a means of stopping the travel of the slider past the ends of the zipper. The separator structure depending from the slider has a configuration in vertical cross-section corresponding to an inverted T, the horizontal portion of the T having the ends thereof adapted to be received in window structure in the flanges above the interlocking elements and adjacent one of the integrated end stops.

Abstract: In a continuous bag-making process, the film and zipper track moves intermittently through a bag machine in a continuous stream, so there is no end to the zipper track on which the slider can be inserted. In the present invention, in the intermittent motion-part of the bag machine, the zipper is cut apart at the location that is to be the edge of the bag, the ends formed by the cutter moved laterally relative to each other exposing the ends and the slider is inserted over one of the exposed ends.

Abstract: A container constituted of a microwave transparent material for the heating or cooking of foods or comestibles through the intermediary of microwaves at a high degree of efficiency and with an enhanced temperature uniformity.

Abstract: Porous metallosilicate catalyst (e.g. Zeolite Beta) is active at low temperature for converting lower alkanol (e.g. methanol) and C.sub.4 -C.sub.7 tertiary alkenes to high octane ether product. Such catalytic reaction is especially useful in multizone catalytic reactor systems employing catstill rectification.

Abstract: The present invention relates to novel multi-layer coextruded thermoplastic stretch wrap films useful for the packaging or palletizing of goods. The films of this invention comprise at least three layers, the three layers having first and second outer layers and an intermediate layer positioned between the first and second outer layers, the first outer layer comprising about 70 to about 98 weight percent of a linear low density polyethylene and about 2 to about 30 weight percent of a low density polyethylene produced by high pressure polymerization, the intermediate layer comprising about 65 to about 85 weight percent of a linear low density polyethylene and about 15 to about 35 weight percent of a low density polyethylene produced by high pressure polymerization, and the second outer layer comprising about 90 to about 99 weight percent of a linear low density polyethylene and about 1 to about 10 weight percent of a low density polyethylene produced by high pressure polymerization.

Abstract: Plastic-film zipper bags having tubular plastic end stops bonded to the plastic zipper to seal the ends of the zipper and to provide stops to retain a slider on the zipper are disclosed. Also disclosed is a method of installing the tubular plastic end stops on the zipper.

Abstract: A continuous process for upgrading reformate feedstock or the like to reduce benzene content and increase octane fuel rating. The improved process comprises maintaining a fluidized bed of regenerable acid solid medium pore zeolite catalyst particles in a turbulent regime reaction zone, preferably maintained with a superficial gas velocity of 0.1 to 1 meter/sec. with reformate feedstock being introduced at a bottom portion of the reaction zone at a weight hourly space velocity (WHSV) of 0.1 to 5, based on active catalyst solids; reaction zone total pressure being less than 2000 kPa. The preferred catalyst particles have an average particle size of 20 to 100 microns (.mu.), with about 10 to 25% of the catalyst particles comprising fine particles having a particle size less than 30 microns; and the preferred zeolite catalyst comprises shape selective medium pore aluminosilicate zeolite having a constraint index of 1 to 12. The benzene is reacted by contacting reformate feedstock, such as C.sub.

Abstract: A cryogenic technique for recovering pure products from a mixture of at least three close-boiling components. A preferred process is provided for separating a hydrocarbon mixture containing an alkene (i.e. ethene or propene), corresponding alkane having the same number of carbon atoms and at least one heavier hydrocarbon component. The improved process comprises: feeding the hydrocarbon mixture to a first distillation tower having an upper reflux stage; recovering a first overhead vapor stream rich in alkene and alkane from the first distillation tower and passing the first overhead vapor stream to a middle distillation stage of a second multi-stage distillation tower; recovering a second overhead vapor stream rich in alkene from the second distillation tower; adiabatically compressing the alkene-rich vapor stream and passing the compressed vapor to a second distillation tower reboiler stage. This provides a heat pump for cooling and condensing the compressed vapor and heating a liquid reboiler stream.

Abstract: Controlled foams of crystalline amorphous polymers include a second phase polymeric material having a transition temperature below that of the matrix polymeric material. The second phase material provides nucleating sites for the growth of gas formed cells which are limited in size by the particle size of the second phase polymeric material.