Abstract: Fine particles of acetylene end-capped polyimide oligomers are copression-molded at ambient temperature. The preformed moldings are cured without melting the resin by heating to an elevated temperature which is lower than the oligomer's melting point.

Abstract: A combination coal liquefaction-gasification-naphtha reforming process wherein the slurry containing substantially the entire yield of normally solid dissolved coal produced in the liquefaction zone comprises substantially the only hydrocarbonaceous feed for the gasification zone and wherein a portion of the naphtha produced in the liquefaction zone is passed through the reforming zone for conversion to gasoline with the remainder of the naphtha being burned as fuel within the process. The amount of hydrocarbonaceous material charged to the gasification zone is established so that the thermal efficiency of the process is substantially unaffected by changes in the ratio of naphtha passed through the reforming zone to naphtha burned as process fuel. The thermal efficiency of the process is maintained at a high level regardless of minor variations in normally solid dissolved coal yield by changing the ratio of naphtha passed through the reforming zone to naphtha burned as process fuel.

Abstract: In a coal liquefaction process which includes a recycle of a product slurry which contain recycle mineral residue and recycle of extraneous catalytic material to said liquefication zone, hydrocracking of the hydrocarbonaceous material from the mineral residue occurs and a mixture of hydrocarbon gases, dissolved liquid, normally solid dissolved coal, suspended mineral residue and suspended extraneous catalytic mineral results. A first portion of said residue slurry is recycled to the liquefication zone, a second portion is passed to separation means and the third portion goes to a hydroclone. Overflow from the hydroclone goes to the liquefaction zone to reduce the median diameter of the particles recycled.

Abstract: In a coal liquefaction process including recycle of a product slurry comprising normally solid dissolved coal and mineral residue, the minimum slurry recycle rate is determined by a pumpability constraint on the solids level of the slurry contained in the feed coal mixing vessel. If the solids level in the feed coal mixing vessel rises above the constraint level, the slurry recycle rate must increase. For coals which generate a high mineral residue content, adequate dilution of the slurry in the feed coal mixing vessel requires the slurry recycle rate to rise to an economically impracticable level. In the present process, mechanical operability is improved and enhanced conversion of normally solid dissolved coal is achieved at a given constraint solids level by passing a portion of the liquefaction zone product slurry through a hydroclone with the hydroclone overflow stream constituting a second recycle slurry.

Abstract: An integrated coal liquefaction-gasification-naphtha reforming process wherein the slurry containing substantially the entire yield of normally solid dissolved coal produced in the liquefaction zone constitutes the only hydrocarbonaceous feed for the gasification zone and wherein substantially all of the naphtha fraction produced in the liquefaction zone is passed through the reforming zone for conversion to gasoline. The cost in terms of thermal efficiency for performing the reforming step is very low when the amount of syngas produced in the gasification zone is adequate to provide upon direct combustion a considerable proportion of the fuel requirements of both the liquefaction and reformer zones.

Abstract: In a process for removing particulate ammonium nitrate from the steam aerosol effluent from a reactor in which nitric acid is neutralized with ammonia, wherein said steam aerosol effluent is scrubbed with a water spray to produce suspended droplets of aqueous ammonium nitrate solution and said droplets are then removed from the effluent by passage through a fibrous mat, an improvement with respect to durability of the fibrous mat and efficiency of droplet removal is obtained by passing the effluent stream through a mat consisting of fibers of average diameter between 5 and 20 microns which have the following composition by weight: between 40 and 50 percent alumina, from 45 to 55 percent silica, less than 6 percent zirconia, less than 1.5 percent B.sub.2 O.sub.3 and less than one percent trace amounts of other inorganics.

Abstract: Bingham fluid compositions are provided which contain a functional material such as a polymerization initiator dispersed in a continuous solid phase, which is a mixture of liquid hydrocarbon, a finely-divided olefin polymer, and a small quantity of a siliceous material having a number of hydroxyl groups chemically bonded to silicon atoms. These compositions, while solid at ambient temperature and pressure, assume the flow characteristics of a liquid under a shearing stress and can be pumped to feed the functional material to a polymerization reactor or molten polymer on a continuous basis.

Abstract: Insects of the orders Coleoptera and Orthoptera and corn rootworms in particular are selectively killed in the presence of living plants by applying to the locus of the insects an effective amount of 1-N,N-dimethylcarbamyl-3-tert.butyl-5-methylthio-1,2,4-triazole. spThis application is a continuation-in-part of copending U.S. Ser. No. 662,171 filed Mar. 1, 1976, now U.S. Pat. No. 4,066,774.

Abstract: Unwanted vegetation is combated both pre- and post-emergently by application of various compounds having the general structural formula: ##STR1## in which R is H, lower alkyl or cycloalkyl, lower alkoxy, phenyl or substituted phenyl and R' is one of the following: H; ##STR2## or phenylsulfonyl.

Abstract: Novel catalysts are provided for the polymerization of olefins such as ethylene. The catalysts consist essentially of a chromium compound supported upon an inorganic carrier containing aluminum and phosphorus moieties, at least a portion of the chromium having a valence of less than 6. The inorganic carrier is an amorphous precipitate of aluminum phosphate or an amorphous precipitate containing aluminum and phosphorus moieties in an atomic ratio in the range of about 5:1 to 1:1. The catalysts are particularly useful for polymerizing ethylene in a Particle Form Process in that the catalyst has essentially no polymerization induction period and provides ethylene polymers having a desirably broad molecular weight distribution and a desirably high melt flow shear ratio.

Abstract: Acetylene end-capped polyimide oligomers are prepared by a process including the following sequential steps:1. Preparing an alkanol or ether solution containing substantially 1 molar equivalent of a dialkyl ester of an aromatic tetracarboxylic acid,2. Adding substantially 0.5 to 0.8 molar equivalent of an aromatic diamine to the solution of (1) to form a reaction product between the diacid and the diamine,3. Adding an aminoarylacetylene to the solution of (2) in a quantity sufficient to provide amine groups equivalent to the free carboxylic acid groups present in the product of (2).4. Heating the solution of (3) to vaporize the solvent therefrom, and5. Heating the product of (4) to convert the carboxylic acid groups, the ester groups, and the amino groups thereof to imide groups.The temperature in steps (2) and (3) is maintained below about 50.degree. C. The temperature in steps (4) and (5) is maintained below about 210.degree. C.

Abstract: Weeds are selectively controlled in soybean fields by post-emergent application of a compound having the structural formula ##STR1## in which X represents bromo, fluoro, cyano or trifluoromethyl and R is hydrogen or methyl.

Abstract: A simplified aqueous gel ammonium nitrate suspension blasting agent is made by a procedure in which the step in which both solid and liquid ingredients are combined takes advantage of a balance of positive and negative heats of solution and the sensitivity of the composition is derived from the combination of hexamethylenetetramine and nitric acid. The blasting agent contains from 10 to 13 weight percent water and 75 to 85 weight percent ammonium nitrate, with no solid fuel, auxiliary oxidizers or sensitivity stabilizers.

Abstract: A new insecticide with systemic activity when applied at the roots of plants is 1-(2,6-dichlorobenzoyl)-3-(5-chloro-2-pyridinyl-N-oxide)urea.

Abstract: The invention is directed to an apparatus useful for dissolving high molecular weight olefin polymers in a hot hydrocarbon solvent. The apparatus includes:(a) A plurality of interconnected fluid chambers, each of which has a fluid inlet and a fluid outlet,(b) Screens covering the inlet and the outlet of each fluid chamber; the screen covering the outlet having a smaller mesh than the screen covering the inlet,(c) Stirring means in each fluid chamber adapted to sweep retained polymer particles free of the screen covering the outlet of said chamber,(d) Means for pumping fluid through the fluid chambers, and(e) Means for supplying heat to fluid passing through the apparatus.

Abstract: The products of the invention are vinyl end-capped oligomers which are prepared from 2,4-bis (p-aminobenzyl) aniline and a vinyl substituted aromatic monoamine, the principal component of which is the compound whose structure is shown in FIG. 3. The products are prepared from either of two (2) precursors. The first precursor is a compound whose structure is shown in FIG. 2 and which is prepared from 2,4-bis (p-aminobenzyl) aniline, a dianhydride of an aromatic tetracarboxylic acid such as 3,3'4,4'-benzophenonetetracarboxylic acid (BTDA) and a vinyl substituted aromatic monoamine, such as 3-aminophenyl-ethylene (APE). The second precursor is a complex amine salt having the structure shown in FIG. 6 and which is prepared from 2,4-bis-(p-aminobenzyl) aniline, a dialkyl ester of BTDA and APE.

Abstract: The products of the invention are acetylene end-capped polyimide oligomers prepared from a dianhydride of an aromatic tetracarboxylic such as 3, 3', 4, 4'-benzophenonetetracarboxylic acid, an aromatic triamine, and a propargyl ester of an amino-substituted aromatic acid such as aminobenzoic acid. The structure of the polyimide oligomers is shown in FIG. 3.

Abstract: Insects of the orders Diptera, Coleoptera, Orthoptera and Lepidoptera are killed in the presence of living plants by applying to the locus of the insects an effective amount of a compound having the structural formula ##STR1## in which R is 2-propynyl, allyl, 2-bromoallyl, 2-chloroallyl, 2-methylallyl, 1-methylallyl or 2,3,3-trichloroallyl and R' is tert.butyl, propyl, cyclopropyl, isopropyl or 1-methylpropyl.

Abstract: Laminated glass structures are prepared by bonding together at least two glass sheets with an ethylene polymer containing substituent carboxylic groups and, optionally, amide and/or ester groups.

Abstract: New compounds which are useful as herbicides and fungicides have the general structural formula ##STR1## in which R is C.sub.1 to C.sub.4 straight chain saturated or unsaturated alkoxy, amino, dimethylamino or straight chain C.sub.1 to C.sub.3 monoalkylamino, R.sup.1 is methyl or ethyl, X is nitro, methoxy, methyl, ethyl, Br, Cl or F in which n is an integer from 0 to 2, at least one of the 2 and 6 positions is unsubstituted and Y is H or a C.sub.1 to C.sub.5 branched or unbranched, saturated or unsaturated alkyl or cycloalkyl substituent group.