Abstract: The present invention relates to a mixture of severely-hindered amines, such as bis-(tertiarybutylaminoethoxy)-ethane (BTEE) and ethoxyethoxyethanoltertiarybutylamine (EEETB), and a one-step synthesis method for its preparation. Besides, this invention describes the use of the mixture for the removal of H.sub.2 S, especially the selective removal of H.sub.2 S in the presence of CO.sub.2.

Abstract: A new alkaline absorbent solution containing a tertiary amino azabicyclic alcohol in combination with its salt with a strong acid and/or in combination with a severely-hindered aminoacid is provided. A process for the removal of H.sub.2 S from fluid mixtures using this absorbent solution to produce a very low level of H.sub.2 S in the treated fluid is also provided. The process is also suitable for the selective removal of H.sub.2 S from fluid mixtures comprising H.sub.2 S and CO.sub.2. Use of the above absorbent solution leads to higher selectivity for H.sub.2 S without damaging capacity than observed when the tertiary amino azabicyclic alcohol is used alone without additive.

Abstract: Disclosed are unique orthorhombic porous tectosilicates intermediate between mordenite (MOR), mazzite (MAZ), and "Omega". Such materials are characterized by an `a` axis value of 7.3.ANG., a `b` axis value of 18.1.ANG. and a `c` axis value that is a multiple sum of 10.6.ANG. (MOR sheet) and 15.6.ANG. (MAZ, "Omega" sheet).

Abstract: A new alkaline absorbent solution containing the additive of a severely-hindered amine salt and/or a severely-hindered aminoacid to a non-hindered amine such as N-methyldiethanolamine (MDEA) is provided. A process for the removal of H.sub.2 S from fluid mixtures using this absorbent solution to produce a very low level of H.sub.2 S in the treated fluid is also provided. The process is also suitable for the selective removal of H.sub.2 S from fluid mixtures comprising H.sub.2 S and CO.sub.2. Use of the above absorbent solution leads to higher selectivity for H.sub.2 S than observed when MDEA is used alone without the additives.

Abstract: The present invention is an apparatus and a method for producing tomographic images of an object irradiated by a beam of collimated radiation transmitted in a plurality of rays through a set of coplanar sections of an object as viewed from a plurality of angles about a rotation axis. The apparatus includes an imaging electro-optic detector to record the transmitted radiation, wherein the electro-optic detector alters the image format, the format alteration being focused; means to determine and align the projected position of the rotation axis on the electro-optic detector; means to align the object with respect to the rotation axis; means to determine and assure spatial uniformity of detector response; means to reduce signal dependent backgrounds; means to determine the projection coefficients from the transmitted radiation with respect to one or more reference calibration exposures; and means to compute a reconstructed image of the object's attenuation coefficients.

Abstract: A zeolite characterized by having an x-ray diffraction pattern as shown in Table 1, a silica to alumina mole ratio of at least six, and containing triethyl methyl ammonium, wherein said organic ammonium templates are within the super cages of said aluminosilicate, said zeolite having a hexagonal unit cell.

Abstract: A process is disclosed for the detection and measurement of wall coke at a specific location in a fluid bed coker through the measurement of the vibrations of the external shell of the coker at that location.

Abstract: A method for making a layered metal chalcogenide catalyst wherein the catalyst has a crystalline structure with increased edge sites produced by lithographic methods.

Abstract: Electrooptic devices for the modulation and conversion of light which include semiconductor superlattices which have large electrooptic and non-linear optical coefficients due to their built-in electric fields. These materials can be deposited at low temperatures onto virtually any substrate.

Abstract: A polymer stabilized colloidal transition metal solution wherein the monomer unit of the polymer has the chemical formula R.sub.x MO, where M is a metal, R is an alkyl group, and x is two less than the valence of M.

Abstract: Disclosed are hydroconversion processes catalyzed by aromatic-metal chelate compositions which are deficient in hydrogen, are cross-linked, and which are comprised of two or more heteroatoms, wherein at least one of the heteroatoms are part of a 5 to 6 member heterocyclic ring, and wherein the metal constituent is selected from Groups III, IVB, VB, VIB, VIIB, and VIII of the Periodic Table of the Elements, and the heteroatom is selected from sulfur, oxygen, and nitrogen.

Abstract: A process for the co-diffusion of aluminum and other elements into austenitic steel which includes heating the steel to a temperature at which co-diffusion occurs in the presence of a source of aluminum, a catalyst and metallic or metalloid elements having substantial solubility in ferrite (bcc phase of iron or iron alloy) so that a microstructure is formed on the steel which is a single layer composite and which includes a fine dispersion of compatible aluminide particles in a continuous ductile ferrite matrix.

Abstract: The present invention is an apparatus for producing tomographic images of an object comprising: a beam of collimated radiation transmitted through the object in a plurality of rays, an imaging electro-optic detector for detecting the attenuated transmitted radiation after it has passed through the object, the detector including an energy convertor, image format altering device, and a readout device, wherein the detector has a detective quantum efficiency greater than 0.05, a total signal dependent background less than 10 percent of the signal from the unattenuated x-ray beam, a useful dynamic range greater than 10, a non-uniformity of response between adjacent active pixels of less than 75%, and deviations of geometric linearity that is less than 10 pixels in the recorded image, means for obtaining the attenuation coefficients from the transmitted radiation, and means for computing a reconstructed image of the object from the attenuation coefficients.

Abstract: Passive acoustic method for monitoring and controlling flow state of two phase fluids through feed nozzles and thereby improving operating stability and high product value yields in major refinery processes or any other process where a finely atomized liquid stream exiting the nozzle is important.

Abstract: Hard materials are generally not tough but they are brittle. Thin film superlattices made of a hard and a tough material or two hard materials having different lattice structure are resistant to crack propagation and are both hard and tough.

Abstract: A method is described which details the preparation of large area close packed monolayers of colloidal particles from random distributions of colloidal particles by compressing the random network.

Abstract: Disclosed are primary sterically hindered aminoacids for use as promoters for alkali metal salts in acid gas scrubbing. The primary sterically hindered aminoacid is selected from 1-amino-cyclopentane carboxylic acid and those represented by the formula: ##STR1## where R.sub.1 and R.sub.2 are independently selected from CH.sub.3, C.sub.2 H.sub.5, and C.sub.3 H.sub.7 ; R.sub.3 and R.sub.4 are independently selected from hydrogen and CH.sub.3 : and n is 0, 2, or 3.

Abstract: If a semiconductor device is prepared so that it contains a photoconductive region in electrical series with a photovoltaic region, (i.e., a Schottky barrier or p-n junction) it can function as an optical amplifier and detector. When weak ac light plus an intense dc light are focused on this sample in an appropriate manner, the detected ac electric current will correspond to the intensity of the dc light but have the phase of the ac light; thus a weak ac light signal is effectively amplified, or a dc light signal is converted into an ac electrical signal capable of synchronous detection.

Abstract: An aluminosilicate characterized by having a faujasite structure, a silica to alumina mole ratio of at least six and bis-(2-hydroxyethyl)-dimethylammonium ions or other large tetra alkyl or hydroxy alkyl ammonium ions within the large cages of the aluminosilicate. This composition may be prepared by crystallization from an aged reaction mixture to an oxide of sodium, a tetra alkyl or hydroxy alkyl ammonium salt, water, a source of silica, a source of alumina and sodium aluminosilicate nucleating seeds in specified relative amounts.

Abstract: The present invention is a photoconductive member which includes a layer of amorphous semiconductor, adjacent to a multilayered amorphous semiconductor material, the composite material sandwiched between two blocking layers. The entire structure is supported by a layer of metal or glass depending on whether the photoconductive member is used in electrophotography or in an image pickup tube.