Abstract: Process for the selective production of para-xylene by methylation of toluene in the presence of a catalyst comprising the crystalline aluminosilicate zeolite ZSM-23.

Abstract: Organic compositions are provided containing anti-rust amounts of esters of adducts of benzotriazole and unsaturated dicarboxylic acids or anhydrides thereof.

Abstract: A motor fuel in the form of a microemulsion is provided comprising a mixture of gasoline, methanol and water and a surfactant blend having a hydrophile-lipophile balance value of from about 3 to about 4.5.

Abstract: A new family of crystalline zeolites, designated ZSM-21, a method of making same and the use thereof in catalytic conversion of hydrocarbons is the subject of this application. The new zeolites have the composition, in the anhydrous state, expressed in terms of mole ratios of oxides as follows:(0.3-2.5)R.sub.2 O : (0-0.8)M.sub.2 O : Al.sub.2 O.sub.3 : >8 SiO.sub.2wherein R is an organic nitrogen-containing cation and M is an alkali metal cation, and are characterized by a specified X-ray powder diffraction pattern.

Abstract: A process is provided for high selectivity transalkylation of alkylaromatic hydrocarbon compounds of from 7 to 10 carbon atoms which comprises contacting said alkylaromatic hydrocarbon compounds with a transalkylating agent in the presence of a porous acid-active zeolite catalyst having a fluid activity index of at least about 18 in a fluidized catalyst system absent added hydrogen at a temperature of from about 300.degree. F to about 1200.degree. F, pressure of from about 0 psig to about 200 psig and a catalyst residence time of from about 0.01 second to about 300 seconds.

Abstract: This specification discloses, as a composition of matter, a phosphorus-containing zeolite and discloses a method for preparing it. The composition is a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index of about 1 to 12, and containing phosphorus incorporated with the crystal structure thereof in an amount of at least about 0.78 percent by weight. The specification also discloses the use of the composition as a catalyst for the conversion of aliphatic compounds.

Abstract: Hydrocracked oils are stabilized against deterioration due to exposure to light and/or air by adding to them a small amount of aromatic amine having a nitro group, the amino and nitro groups being ortho or para to each other.

Abstract: Lubricants are stabilized against oxidation by adding thereto a stabilizing amount of an ester of a hindered hydroquinone. An example of a suitable material is (4-hydroxy-3,5-di-t-butylphenyl)laurate.

Abstract: A regenerator design and method are provided which rely upon a segmented regeneration gas distributor grid to vary regeneration gas flow upwardly through the bed of catalyst above. The design includes an expanding annular section formed by a curved vertically extending baffle positioned adjacent and downstream of the catalyst tangential inlet and a radical dilute phase baffle extending from slightly beneath the bed surface to above the cyclone inlets. The width of the dilute phase baffle is from the wall of the regenerator to the center thereof, and beyond the rim of the catalyst outlet. Further, all cyclone diplegs between the outlet and inlet should be positioned to discharge tangentially to the swirl.

Abstract: Intercalation of a Lewis acid fluoride in graphite is effected in the presence of gaseous fluorine. The reaction results in new compositions useful as catalysts and as atmospheric pressure containers for normally gaseous Lewis acid fluorides.

Abstract: A method is provided for desulfurization of oil stock, e.g. residual oil, having a minimum sulfur content of about 2 weight percent and a minimum metals content of about 50 ppm to produce a low-sulfur, high-metals content raffinate and a high-sulfur, low-metals content extract which comprises contacting said oil stock with a solvent selective for low molecular weight aromatics and having a boiling point within the range of from about 0.degree. F to about 100.degree. F and a density greater than or less than the density of the oil stock being contacted by at least 0.1 g/cc, said contacting being conducted at a temperature of from about 60.degree. F to about 212.degree. F, a solvent/oil stock volume ratio of from about 0.25 to about 10 and a pressure higher than the vapor pressure of the solvent at the contacting temperature, and separating the low-sulfur, high-metals content raffinate from the high-sulfur, low-metals content extract.

Abstract: A catalytic process is provided for the selective production of para-xylene by contacting, under conversion conditions, a charge stock containing, as a major reactant, at least one hydrocarbon selected from the group consisting of toluene, a C.sub.3 -C.sub.10 olefin, and mixtures of the foregoing with a catalyst comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index, as hereinafter defined, within the approximate range of 1 to 12 and which has combined therewith magnesium in an amount of at least about 0.5 percent by weight.

Abstract: A catalytic process is provided for the selective production of para-xylene by contacting, under conversion conditions, a charge stock containing, as a major reactant, at least one hydrocarbon selected from the group consisting of toluene, a C.sub.3 -C.sub.10 olefin and mixtures of the foregoing with a catalyst comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index, as hereinafter defined, within the approximate range of 1 to 12 and having combined therewith boron in an amount of at least about 0.2 percent by weight.

Abstract: A process for the continuous preparation of lactone-esters which comprises: passing a liquid feed of a branched-chain alkenylsuccinic anhydride containing a chain wherein branching is derived from C.sub.3 to C.sub.10 olefins, and an alcohol in a hydrocarbon solvent through a packed bed of a cationic exchange resin catalyst containing acid groups, in a reaction zone, said reaction zone being maintained at a pressure from about 1 to about 20 atmospheres and at a temperature from about 120.degree. C to about 160.degree. C.

Abstract: Phosphorus- and sulfur-containing metal salts are prepared by reacting a mixture comprising a metal oxide and a hydrocarbon in the presence of an oxidizing gas and then reacting this product with a phosphorus sulfide. The invention provides lubricant compositions containing the product.

Abstract: Lubricant compositions are provided, containing an antiwear amount of a compound having the structure Y(CN).sub.n in which n is a whole number from 2 to 6 and when n is 2, Y is alkylene, phenylene or benzylene, when n is 3, Y is a tris(ethyleneoxy) paraffin having from 3 to 12 carbon atoms, when n is 4, Y is a tetrakis(ethyleneoxy) paraffin having from 4 to 12 carbon atoms, when n is 5, Y is a pentakis(ethyleneoxy) paraffin having from 5 to 16 carbon atoms, and when n l is 6, Y is a hexakis(ethyleneoxy) cycloparaffin having from 6 to 16 carbon atoms.

Abstract: A catalytic process is provided for converting lower monohydric alcohols and their ethers, especially methanol and dimethyl ether, to a hydrocarbon mixture rich in C.sub.2 -C.sub.3 olefins and mononuclear aromatics with high selectivity for para-xylene production by contact, under conversion conditions, with a catalyst bed comprising a major proportion of particle-form inert solid diluent having intermixed therewith a crystalline aluminosilicate zeolite characterized by (1) a crystallite size not greater than 0.5 micron, (2) a particle size less than 2 millimeters in its smallest cross-sectional dimension, (3) a silica to alumina ratio of at least about 12 and (4) a constraint index, as hereinafter defined, within the approximate range of 1 to 12.

Abstract: As a new class of multifunctional additives, for imparting dispersancy and viscosity improving properties to lubricant compositions, ether-linked polymers having the structure: ##STR1## in which: A and B may be the same, i.e.

Abstract: A catalytic process is provided for converting a C.sub.1 -C.sub.4 monohydric alcohol, an ether derived from said alcohol or a mixture of such alcohol and ether to a hydrocarbon mixture rich in C.sub.2 -C.sub.3 olefins and mononuclear aromatics with high selectivity for para-xylene production by contact, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite having a crystal size of at least about 1 micron, a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12.

Abstract: An apparatus is provided to directly measure the retention time of a volatile liquid sample in the column of a chromatograph. The apparatus is characterized by a chromatograph having certain resolution, a timer, and a circuit to activate the timer while the sample is eluted from the column.A simple field test to determine the final boiling point of a hydrocarbon fraction such as gasoline is effected by comparing the retention time found for an unknown sample with that of a sample having known final boiling point.