Abstract: Oxides of nitrogen (NO.sub.x) emissions from FCC regenerators in complete CO combustion mode are reduced by degrading regenerator performance to increase the coke on regenerated catalyst. High zeolite content cracking catalyst, regenerated to contain more coke, gives efficient conversion of feed and reduces NO.sub.x emissions from the regenerator. Operating with less catalyst, e.g., 30-60% of the normal amount of catalyst in the bubbling dense bed, can eliminate most NO.sub.x emissions while increasing slightly plant capacity and reducing catalyst deactivation.

Abstract: A fluidized catalytic cracking process and apparatus with an active bed annular spent catalyst stripper is disclosed. An annular catalyst stripper disposed about a riser reactor is separated, by a baffle or fluid flow, into a secondary stripper nearer the catalyst regenerator and a primary stripper on the far side of the annular stripper from the regenerator. Catalyst flows through the primary stripper as a dense bed, to a transport means which lifts catalyst to the inlet of the secondary stripper. The "dead" region on side of annular strippers far from the regenerator is eliminated. Preferably catalyst is added to the primary stripper via cyclone diplegs, and a cyclone is used on the transport outlet.

Abstract: Oxides of nitrogen (NO.sub.x) emissions from an FCC regenerator are reduced by operating the regenerator in partial CO burn mode and adding substoichiometric, or just stoichiometric air to the flue gas. Much CO and most NO.sub.x and NO.sub.x precursors are thermally converted at 2000.degree.-2900.degree. F., then the gas is cooled below about 1800.degree. F. and burning of CO completed.

Abstract: The disclosed data stream optimization process is containing two logical entities, the first being the pre-comparison optimizer component and the second being the comparison component. The pre-comparison optimizer component performs two discrete tasks. First, the input data stream is written into a next state buffer. Second, the elimination of redundancies involves detecting and removing redundant screen attributes, since the terminal's execution time for processing a screen attribute is more than that required for a data character. The comparison component contains three distinct sub-components. First, non-data constructs such as commands and orders are optimized and placed in the outgoing data stream. Second, the screen image that is represented by the data stream is compared to the existing screen image to further reduce the outgoing data stream.

Abstract: A roller storage system for facilitating storage of wheeled vehicles such as automobiles, boat or snowmobile trailers, farm equipment, and the like in otherwise inaccessible locations. The storage system involves the use of a low ramp-like truck or dolly for each wheel of the vehicle. The ramp has side walls and an end backstop wall. It is supported on opposite sides by longitudinally extending rollers located so that their bottom edges extend below the bottom surface of the ramp to permit easy lateral movement on the rollers. The vehicle to be stored is driven adjacent to the otherwise inaccessible storage area. A truck or dolly is located forward of each wheel and the vehicle is driven or pushed onto them and moved laterally into the otherwise inaccessible storage area.

Abstract: A system for molding concrete articles such as paving stones, including a rack having opposing first and second vertical walls that have corresponding rails, and trays that include article molds adapted to receive concrete for curing, the trays being sized and constructed to slide on the rails.

Abstract: A method for producing concrete paving stones includes slidably mounting paving stone molds in a vertical row in a rack; sliding one mold to a different depth in the rack; filling the mold with concrete; sliding the mold to its original position; and filling the other molds in a similar manner.

Abstract: A fluidized bed catalytic process for conversion of propene-rich light olefinic gas feedstock comprising at least 2 mol % ethene and having a C.sub.3 :C.sub.2 molar ratio of at least about 2:1 to produce hydrocarbons rich in C.sub.4.sup.+ aliphatics and aromatics, comprising maintaining a turbulent fluidized bed in a reactor operating at a moderate pressure in the range from about 400 to 2500 kPa, and temperature of about 315.degree. to 510.degree. C., the catalyst having an apparent particle density of about 0.9 to 1.6 g/cm.sup.3, a size range of about 1 to 150 microns, and average catalyst particle size of about 20 to 100 microns containing about 10 to 25 weight percent of fine particles having a particle size less than 32 microns, by passing hot feedstock vapor upwardly through the fluidized catalyst bed at a superficial fluid velocity of about 0.3 to 2 meters per second. Hydrocarbon product is recovered containing a major amount of C.sub.5.sup.+ hydrocarbons and containing C.sub.3 -C.sub.

Abstract: A turbulent, dense fluid-bed of a medium pore zeolite metal-losilicate catalyst, the bed having a tailored distribution of weight fractions of particles having activities which fall generally along a predetermined curve of activity distribution, is operated under low severity conditions at low WHSV, under moderate pressure and moderate severity to obtain surprisingly high conversion to C.sub.5.sup.+ hydrocarbons having an olefin content in excess of about 80%, about one third by weight of which is distillate (C.sub.9.sup.+). Only a small amount of cycloolefins and a negligibly small amount of aromatics and paraffins are produced. The distillate is formed with a single pass yield in the range from about 10-40 weight percent. The reactor is operated only in the distillate mode. The dense fluid bed has a density, measured at the bottom of the reaction zone, less than 640 kg/m.sup.3 (40 lb/ft.sup.3), and preferably operates at a temperature in the range from about 250.degree. C. (482.degree. F.) to about 371.

Abstract: A fluidized bed catalytic process is disclosed for the conversion of light olefinic gas feedstock to produce hydrocarbons rich in C.sub.5 + liquids. Low temperature turbulent fluidized bed regeneration preserves the acid activity of the catalyst thus reducing catalyst makeup requirements.

Abstract: A method and apparatus for investigating earth formations surrounding a borehole operates by selectively heating a region of the formations, and measuring the thermal response to obtain useful information concerning the characteristic length scales of the pores in the heated region. The thermal response is obtained indirectly by measuring the electrical conductivity response. The invention can be utilized to obtain, inter alia, indications of porosity, permeability, and the distribution of pore geometries. In accordance with an embodiment of the method of the invention, the following steps are performed: heating a region of the formations with a series of pulses of microwave electromagnetic energy; measuring the conductivity characteristic of the region which result from the heating pulses; and determining a property of the region of the formations from the measured conductivity characteristic.

Abstract: In a method for locating fractures in subsurface earth formations traversed by a borehole a first signal is generated representative of low frequency Stoneley waves (that is tube waves) propagating along the borehole from a source mounted in a logging tool. A second signal is generated by an array of detectors on the tool, representative of low frequency Stoneley waves propagating along the borehole and arising from reflection from fractures of the waves propagating from the source. An indication of the presence of fractures is derived by deconvolving the second signal with the first signal and identifying the time and magnitude of the peak value of the envelope of the deconvolved signal. The variation that would be expected in the presence of fracture and the actual variation are compared and a fracture detected when the actual and expected variations match. Alternatively the first and second signals can be cross-correlated and the time of the peak negative value of the cross-covariance determined.

Abstract: Virtual quantitative transfer of air and water borne particulates from a collection media to a more suitable media for individual particle micro-analytical procedures is performed with a redeposition spot sampler employing transfer fluids preferably in conjunction with ultrasonic vibration. Provides quantitative control over the particle loading per unit area of "new" filter media.

Abstract: An annealing process carried out at 800.degree. C. in a wet O.sub.2 ambient permits the manufacture of a reliable storage capacitor wherein the dielectric layer is comprised of silicon oxynitride formed by low pressure chemical vapor deposition (LPCVD). The manufacturing process includes first depositing the silicon oxynitride film by LPCVD, second annealing in wet O.sub.2 at 800.degree. C. or N.sub.2 at 1000.degree. C., third forming an N-type region in the silicon substrate by As.sup.+ ion implantation through the silicon oxynitride film, fourth annealing in wet O.sub.2 at 800.degree. C., and fifth depositing an electrode.

Abstract: By establishing a slow compressional wave in subsurface formations, and then measuring the velocity of the slow compressional wave, one can obtain useful information about the porosity and formation factor of the formations through which the slow compressional wave has passed.

Abstract: A pre-stressed impact testing device designed to measure the energy which is absorbed during fracture of metal samples under pre-stressed conditions. The device includes a base portion and a pendulum supporting portion which is positioned thereabove. The base portion includes first and second elongated and horizontally spaced-apart beams having opposite ends with a third beam secured to and extending between the first and second beams at one end thereof. A hydraulic ram is secured to and extends between the other ends of the first and second beams for selectively moving the other ends of the first and second beams away from each other so that the first and second beams will be elastically stressed. Connectors are provided on each of the first and second beams for attachment to the opposite ends of the sample material whereby the sample material will be placed in stress when the first and second beams are elastically stressed.

Abstract: Carminomycin 1, a known antibiotic, is obtained in a highly purified form from crude fermentation solids containing it by use of a novel multistep purification process involving solvent extraction, countercurrent distribution and adsorption chromatography.

Abstract: A glass crucible (30) for containing a material from which a silicon crystal melt is produced, wherein the inside surface area of the crucible is increased to react with the silicon melt (31) to increase the oxygen content thereof. The inside surface area may be increased by incorporating inwardly directed silica ribs (40) or concentric, hollow silica cylinders (32) as well as forming corrugations (45) or undulations on the inside surface thereof.