Abstract: An adsorbent for removing impurities such as CO2, H2S and water vapors from a gaseous olefin stream of at least C2 to C4 olefins is disclosed. The adsorbent comprises of zeolite CaA molecular sieve modified with metal silicate.

Abstract: The present invention relates to a process for the selective production of para-diethyl benzene from a mixed aromatic feedstock containing ethyl benzene and at least one other aromatic compound selected from benzene, alkylated benzene having alkyl group with carbon number 1 to 6, mono-alkyl aromatics, dialkyl aromatics, trialkyl aromatics, tetraalkyl aromatics, pentaalkyl aromatics, hexaalkyl aromatics, containing side chains having 1 to 6 carbon atoms, and any mixtures thereof, the process comprising of (a) alkylating the feedstock under alkylating conditions, over a selectivated metallosilicate composite catalyst; and (b) recovering a product stream containing at least 95 wt % para-diethyl benzene, the product stream being substantially free from other isomers of diethylbenzene, C8 aromatics, C9 aromatics, C10+ heavy aromatics other than diethyl benzene isomers, sulphur, halogen, olefinic compound and carbonyl compounds.

Abstract: A thermoplastic polyolefin alloy having high (notched) Izod impact strength and process for its preparation are disclosed. The alloys of this invention comprises of a polypropylene block copolymer as a base polymer, an elastomer, a compatibilizer and optionally a natural filler and is prepared by melt blending a twin-screw extruder (or Buss-co-kneader) the above ingredients. The polyolefin alloys of this invention exhibit very high (notched) Izod impact strength of 60 to 90 kg. cm/cm, flexural modulus of 6,000 to 8,000 kg/cm2, tensile strength at yield of 150 to 200 kg/cm2, and heat deflection temperature of 60 to 70° C. with 4.6 kgf stress. The alloys also possess melt flow index of 2-5 g/10 min. when tested according to ASTM D1238 and allow injection molding, compression molding, thermoforming and other conventional techniques to be applied for making end products that demand high impact strength.

Abstract: A thermoplastic polyolefin blend comprising of a base polymer and up to 25% by wt of an ethylene propylene diene monomer (EPDM), the balance if any consisting of a conventional filler and/or a conventional compatibilizer or interfacial agent is disclosed. The blend of the present invention is prepared by extruding a base polymer with ethylene propylene diene monomer (EPDM) at a temperature in the range of from 150 to 230° C. The blends of the invention exhibit very high mechanical properties at moderate concentrations of EPDM and/or filler, and can be made into industrial pallets either by injection molding or by thermoforming.

Abstract: A process for the preparation of low molecular weight linear alpha olefins is disclosed. The process comprises oligomerising ethylene in an inert aliphatic or aromatic solvent in the presence of a catalyst comprising of a first component selected from zirconium alkoxide and zirconium aryloxide and a second component selected from alkyl aluminum halide and/or alkyl aluminum.

Abstract: A repeated “soak and dry” selectivation process for preparing a modified metallosilicate catalyst composite is disclosed comprising of a mixture of amorphous silica, alumina and a pore size controlled metallosilicate useful for alkylaromatic conversion. The process comprises (a) contacting an intermediate pore metallosilicate with an organosilicon compound in a solvent for a specific duration and then recovering the solvent, (b) combining the organosilicon compound treated metallosilicate with water and then drying the catalyst, (c), repeating the steps a) and b) above and (d) calcining the catalyst in an oxygen containing atmosphere sufficient to remove the organic material and deposit siliceous matter on the metallosilicate. In a another embodiment, when the organosilicon compound is water soluble, step (b) may be avoided.

Abstract: An adsorbent for selective adsorption of unsaturated hydrocarbons from its mixture with saturated hydrocarbons, carbon dioxide, carbon monoxide, permanent gases or mixture thereof. The adsorbent includes a silver or copper compound in an amount of 1 to 70 wt % and a substrate in 30 to 99% wt %. Also a method for the manufacture of an adsorbent, which includes impregnating or dispersing a silver (I) or copper (I) compound on a mesoporous substrate or support to form a composite material and subjecting the composite material to heat treatment. Also, a process for separating ethylene and/or propylene from gas mixtures containing them by passing a stream of the gas mixture through a mass of the adsorbent at a temperature from 0° C. to 170° C. and a pressure from 0.1 to 100 atmospheres and releasing the adsorbed ethylene and/or propylene by lowering pressure and/or increasing temperature.

Abstract: A melt processable thermoplastic blend and a process for the preparation thereof is disclosed. The blend comprises an intimate mixture of polypropylene copolymer, EPDM and other additives and exhibits suitable flow properties as well as mechanical properties (such as melt flow index: 10-15 g/10 minutes; flexural modulus: 8000-15000 kg/cm2; (notched Izod impact strength: 50-60 kg.cm/cm; and heat deflection temperature: 60-105° C.) necessary for injection molding of car bumpers as well as their property requirements. It is prepared by extruding the components in a twin screw extruder or a Buss co-kneader all together or in separate batches, while for example, the twin screw temperature is maintained in the range of 180 to 250° C. and the screws are rotated at a speed of 50 to 100 rpm.

Abstract: The present invention discloses a process for the polymerization of olefins in the presence of a catalyst comprising metal complexes of 2,6-diacetylpyridine bis-imines Preferably, the metal is a trivalent metal is selected from the group consisting of trivalent Fe, Ru, or Cr.

Abstract: A novel catalyst for use in dehydrogenation of saturated hydrocarbons to unsaturated hydrocarbons and a method for its preparation is disclosed. Said catalyst comprises a composite incorporated within its spatial geometry on a percentage by weight basis, with a uniform concentration gradient, the following active elements: from 0.1 to 5.0% of a noble metal; from 0.1 to 5.0% of a metal of Group IV A; from 0.1 to 6.0% of a metal Group III A; from 0.1 to 10.0% of an alkali or alkaline earth metal element; from 0.01 to 10.0% of a halogen; and from 0.1 to 5.0% of a metal Group VIII selected from Fe, Co and Ni provided on a high surface area meso or macroporous support. The the high surface mesoporous support comprises a spheroidal gamma alumina support with a diameter of 1.4 to 2.0 mm, a surface area in the range of from 150 to 220 m2/g, with bimodal narrow pore size distribution, water adsorption capacity in the range of from 1.4 to 2.

Abstract: A thermoplastic polyolefin blend comprising of a base polymer and up to 25% by wt of an ethylene propylene diene monomer (EPDM), the balance if any consisting of a conventional filler and/or a conventional compatibilizer or interfacial agent is disclosed. The blend of the present invention is prepared by extruding a base polymer with ethylene propylene diene monomer (EPDM) at a temperature in the range of from 150 to 230° C. The blends of the invention exhibit very high mechanical properties at moderate concentrations of EPDM and/or filler, and can be made into industrial pallets either by injection molding or by thermoforming.

Abstract: The present invention discloses an adsorbent for selective adsorption of unsaturated hydrocarbons from its mixture with saturated hydrocarbons, carbon dioxide, carbon monoxide, permanent gases or mixture thereof comprising of silver or copper compound 1 to 70 wt % and substrate 30 to 99%. The invention also discloses a method for the manufacture of an adsorbent for use in selective adsorption of unsaturated hydrocarbons or mixtures thereof from a mixed gas, which comprises impregnating or dispersing a silver (I) or copper (I) compound on a mesoporous substrate or support to form a composite material and subjecting said composite material to heat treatment. In another important aspect, the present invention also relates to a process for separating ethylene and/or propylene from gas mixtures containing them by passing a stream of said gas mixture through a mass of said adsorbent at a temperature from 0° C. to 170° C. and a pressure from 0.

Abstract: A melt processable thermoplastic blend and a process for the preparation thereof is disclosed. The blend comprises an intimate mixture of polypropylene copolymer, EPDM and other additives and exhibits suitable flow properties as well as mechanical properties (such as melt flow index: 10-15 g/10 minutes; flexural modulus: 8000-15000 kg/cm2; (notched Izod impact strength: 50-60 kg.cm/cm; and heat deflection temperature: 60-105° C.) necessary for injection molding of car bumpers as well as their property requirements. It is prepared by extruding the components in a twin screw extruder or a Buss co-kneader all together or in separate batches, while for example, the twin screw temperature is maintained in the range of 180 to 250° C. and the screws are rotated at a speed of 50 to 100 rpm.

Abstract: A repeated “soak and dry” selectivation process for preparing a modified metallosilicate catalyst composite is disclosed comprising of a mixture of amorphous silica, alumina and a pore size controlled metallosilicate useful for alkylaromatic conversion. The process comprises (a) contacting an intermediate pore metallosilicate with an organosilicon compound in a solvent for a specific duration and then recovering the solvent, (b) combining the organosilicon compound treated metallosilicate with water and then drying the catalyst, (c), repeating the steps a) and b) above and (d) calcining the catalyst in an oxygen containing atmosphere sufficient to remove the organic material and deposit siliceous matter on the metallosilicate. In a another embodiment, when the organosilicon compound is water soluble, step (b) may be avoided.

Abstract: A process for the preparation of low molecular weight linear alpha olefins is disclosed. The process comprises oligomerising ethylene in an inert aliphatic or aromatic solvent in the presence of a catalyst comprising of a first component selected from zirconium alkoxide and zirconium aryloxide and a second component selected from alkyl aluminum halide and/or alkyl aluminum.

Abstract: A process for the manufacture of linear alpha-olefins is disclosed. The process employs, for the purposes of oligomerizing an unsaturated aliphatic hydrocarbon to linear alpha-olefins, a catalyst mixture comprising titanium aryl and/or titanium alkoxide, organoaluminum halide and optionally one or more additives selected from a group containing phosphorus, oxygen and sulphur compounds.

Abstract: The invention relates to the manufacture of novel molecular sieve adsorbents which are selective towards oxygen from its gaseous mixture with argon and/or nitrogen. More particularly, this invention relates to the manufacture of novel molecular sieve adsorbents useful for the separation of oxygen-argon-nitrogen gaseous mixture.

Abstract: A process to maximize the production of low molecular weight alpha olefins from ethylene is disclosed. The process comprises oligomerizing ethylene in the presence of a catalyst, of titanium aryloxide and/or titanium alkoxide; alkyl aluminum halide and triaryl phosphine and/or trialkyl phosphine in the temperature range of 80.degree. C. to 110.degree. C. at substantially low pressures of from 60 to 150 psi. A continuous supply of ethylene is maintained.

Abstract: A selective, simple and efficient process for single step alkylation of ethylbenzene with ethanol, in the presence of catalytically effective amount of pore size controlled and preconditioned gallo aluminosilicate zeolite is disclosed. The process comprises subjecting a feed mixture of ethylbenzene, ethanol and optionally one or more of the reaction product/byproduct in contact with the catalyst under a chosen set of conditions. The product para-diethylbenzene can be recovered directly from the reactor effluent, by simple distillation, avoiding complicated separation processes, with a high purity sufficient for commercial application.

Abstract: A novel catalyst composite for use in the dehydrogenation of paraffins to the corresponding monoolefins said composite incorporating within its spatial geometry on a percentage by weight basis a predetermined concentration gradient of a noble metal, a metal of Group IV A, a metal of Group III A, an alkali or alkaline earth metal element, a halogen; and a metal of Group VIII selected from. Fe, Co and Ni provided on a high surface area mesoporous support and a process for the preparation thereof.