Abstract: A body made up of substantially continuous high strength multicellular support having porous cell walls, and pores in the cell walls having an average pore diameter of which have active material embedded therein, and an outer surface. The body is made of material which can be ceramics, glass, glass-ceramic, cermet, metal, oxides, and combinations of these. The active material can be molecular sieve, activated carbon, and combinations these. A method for producing a pore-impregnated body which involves providing the substrate having a wall porosity greater than about 45% by volume, and an average pore diameter of about 15 to 30 micrometers, providing a slurry of active material dispersed in a medium, contacting the support with the slurry at subatmospheric pressure to substantially fill the open pores of the substrate with the active material, removing excess slurry from the outer surface and the non-pore surfaces of the cell walls, followed by drying.

Abstract: The present invention encompasses a monolithic multi-component composite polyolefin catalyst particle comprising at least two distinct supported catalyst components wherein each catalyst component is capable of producing a resin having a melt index different from at least one other catalyst component under constant reaction conditions. Methods of producing and using the multi-component catalyst are disclosed.

Abstract: A catalyst for cleaning exhaust gases has a first catalyst layer having as an active metal on an elemental support at least one noble metal selected from the group consisting of platinum, rhodium and palladium and a second catalyst layer having iridium as an active metal which is provided as a overlayer on the first catalyst layer.

Abstract: The invention relates to a method for the preparation of a special calcium and/or magnesium hydroxide in which CaO and/or MgO is reacted with water in the presence of an additive selected among ethylene glycol, diethylene glycol, triethylene glycol, monoethanolamine, diethanolamine, triethanolamine and mixtures thereof, the weight ratio additive to CaO and/or MgO being greater than 0.002:1.

Abstract: There is provided a process for the alkylation of toluene with ethylene to selectively produce para-ethyltoluene over a catalyst which has been selectivated by multiple treatments with a siliceous material.

Abstract: A method for removing nitrogen oxides from an oxygen-rich exhaust gas containing nitrogen oxides and hydrocarbons comprising bringing the oxygen-rich exhaust gas into contact with a catalyst comprising (1)(i) a zeolite containing an apatite compound and having an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 15 and (ii) at least one active metal or (2)(ii) a zeolite containing an apatite compound and having an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 15, (ii) an alkaline earth metal and (iii) at least one active metal.

Abstract: Process and apparatus for reducing the NO.sub.x content of a gas stream containing NO.sub.x by reacting the gas stream with activated species. The activated species may be produced by providing a fluid reactant selected from HNCO, NH.sub.3, and H.sub.2 NNH.sub.2 and passing the fluid reactant across a catalyst. The activated species are believed to include free radicals selected from the group consisting of .circle-solid.NCO, .circle-solid.NH.sub.2, .circle-solid.NH, .circle-solid.H, .circle-solid.N, .circle-solid.OH, .circle-solid.NC, and mixtures thereof. The activation step takes place out of contact with the gas stream, so the catalyst or other activated species generator is not exposed to the gas stream. The activation step allows the contacting step and subsequent reaction of the activated species and the NO.sub.x to proceed more quickly, more completely, or at a lower temperature than would otherwise occur without the activation step.

Abstract: A process for ethylbenzene production that involves contacting a hydrocarbon feedstream including benzene and ethylene, under alkylation conditions, with a catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two selectivation sequences, each selectivation sequence comprising contacting the catalyst with a silicon compound followed by calcination. The modified catalyst used in the process may also be steamed. Optionally, the modified catalyst may be trim-selectivated.

Abstract: Polymetal oxide materials of the general formula I?A!.sub.p ?B!.sub.q (I),where ##STR1## X.sup.1 is W, Nb, Ta, Cr and/or Ce, X.sup.2 is Cu, Ni, Co, Fe, Mn and/or Zn,X.sup.3 is Sb and/or Bi,X.sup.4 is Li, Na, K, Rb, Cs and/or H,X.sup.5 is Mg, Ca, Sr and/or Ba,X.sup.6 is Si, Al, Ti and/or Zr,X.sup.7 is Mo, W, V, Nb and/or Ta,a is from 1 to 8,b is from 0.2 to 5,c is from 0 to 23,d is from 0 to 50,e is from 0 to 2,f is from 0 to 5,g is from 0 to 50,h is from 4 to 30,i is from 0 to 20,x and y are each a number which is determined by the valency and frequency of the elements other than oxygen in I and p and q are non-zero numbers whose ratio p/q is from 160:1 to 1:1,and their use as catalysts.

Abstract: A catalyst for production of high octane number gasoline having low aromatic content from a hydrocarbon feedstock containing n-paraffins includes a zeolite composition containing chromium in an amount of between about 0.1% to about 1.0% by weight of the catalyst, said chromium being located at acidic sites of said zeolite composition whereby aromatic forming reactions are inhibited. The catalyst is provided according to a process including sequential impregnation so as to position chromium at the acidic sites as desired.

Abstract: Self-heating characteristics of a spontaneously combustible catalyst are reduced by treating spontaneously combustible catalysts with oxygen-containing hydrocarbons having at least 12 carbon atoms. The treatment is particularly suitable for reducing the self-heating characteristics of sulfidable metal oxide(s)-containing catalysts, presulfurized catalysts, presulfided catalysts or reduced catalysts. When applied to sulfur-containing catalysts, the treatment gives a catalyst that has suppressed self-heating properties without substantially compromising sulfur retention or activity. Further, a method of safely unloading a catalyst from a reactor is provided where the catalyst in the reactor is treated with a liquid mixture containing oxygen-containing hydrocarbon having at least 12 carbon atoms to wet the catalyst.

Abstract: An as-synthesized zeolite having titanium substituted in its lattice framework and containing an organic template such as a quaternary ammonium salt may be activated for use as a catalyst by treating said as-synthesized zeolite with ozone. At least partial removal and/or reaction of the organic template is accomplished even at moderate temperatures, in contrast to conventional calcination techniques which require the use of significantly higher activation temperatures.

Abstract: This invention relates to a novel catalyst for preparing methacrylic acid by gas phase oxidation of methacrolein obtained by gas phase catalytic oxidation of isobutylene or t-butanol. The catalyst is represented by the formula:P.sub.a Mo.sub.11 V.sub.b Du.sub.c X.sub.d Q.sub.e Z.sub.f O.sub.gwhereinX is at least one of potassium, rubium, cessium, and thallium;Z is at least one of lead, antimony, chromium, iron, bismuth, cerium, and zinc;Q is at least one of organic quaternary ammonium cations consisting of ##STR1## in which R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently selected from the group consisting of C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 substituted alkyl having functional groups;a is a number from 0.8 to 1.6;b is a number from 0.6 to 2;c is a number from 0.1 to 0.8;d is a number from 0.7 to 2.2;e is a number from 0.01 to 0.1;f is a number from 0 to 0.5; andg is a number of oxygens required to satisfy the valence requirements of the other elements present.

Abstract: A catalyst for the purification of exhaust gas comprises a first coat layer of a palladium-carried activated alumina containing Ce, Zr and La formed on a honeycomb carrier, a second coat layer of an activated alumina containing Ce, Zr and La formed on the first coat layer, and a third coat layer of copper ion-exchanged zeolite powder formed on the second coat layer and efficiently purifies NOx, HC and CO in the exhaust gas under conditions from theoretical air-fuel ratio to excessive oxygen atmosphere.

Abstract: A catalyst which consists of a carrier and a catalytically active oxide material applied to the surface of the carrier is prepared by a process in which the carrier is first moistened with, as an adhesive liquid, an aqueous solution of an organic substance boiling at above 100.degree. C. at atmospheric pressure and a layer of active oxide material is then bonded to the surface of the moistened carrier by bringing it into contact with dry, finely divided active oxide material and the adhesive liquid is then removed from the moistened carrier coated with active oxide material.

Abstract: The present invention is a method of producing an ex situ selectivated catalytic molecular sieve for shape selective aromatic alkylation in which a catalytic molecular sieve having a reduced activity is modified by being exposed to at least two selectivation sequences, each sequence includes contacting the molecular sieve with a selectivating agent and subsequently calcining the contacted molecular sieve. The present invention is also a method of producing an ex situ selectivated catalytic molecular sieve for shape selective aromatic alkylation in which a catalytic molecular sieve is modified by being exposed to at least two selectivation sequences and then reduced in activity. The ex situ selectivated catalytic molecular sieves may optionally be further modified by in situ trim selectivation. The present invention is also a process for shape selective aromatic alkylation utilizing the modified molecular sieves.

Abstract: A class of highly stable supergallery pillared clay compositions that have a basal spacing up to 55 .ANG. corresponding a gallery height of 35 .ANG. for samples dried at room temperature and a basal spacing up to 45 .ANG. corresponding a gallery height of 255 .ANG. for samples steamed at 800.degree. C. for 17 hours. Said compositions are prepared by special procedures including pillaring reaction in presence of poly (vinyl alcohol) as a pillaring precursor, an aging process at pH of around 4 to 9, and a calcinating or steaming treatment at high temperature. The new compositions exhibit catalytic properties and adsorption properties superior to prior art pillared clays. Said compositions are useful as catalysts for carbonium-ion reaction, and as adsorbents and catalyst carriers. They are especially suitable for preparing microspheric cracking catalysts for heavy oil or residual feedstock.

Abstract: A chemical composition and method for treating oil-contaminated waste waters, and, more particularly, waste waters in the form of oily emulsions that may also contain dissolved metal ions, and/or metal solids, to sorb (adsorb and/or absorb) the contaminants between and within platelets of sodium bentonite clay particles, and calcium bentonite clay particles, and the contaminants are encapsulated or trapped in a matrix of calcium bentonite platelets and sodium bentonite platelets that are flocculated by a flocculant, such as a cationic polymer, so that leaching of contaminants into the waste water, or subsequently into a liquid portion of a landfill, is unexpectedly reduced.

Abstract: A gas mixture comprised of nitric oxide and, optionally an inert gas, and containing small amounts of nitrogen dioxide, and perhaps moisture and sulfur dioxide, is purified by passing the gas stream through a bed of zeolite having a silica to alumina ratio not greater than about 200. The concentration of nitrogen dioxide, sulfur dioxide and moisture in the gas stream are reduced to about 1 ppm or less as the gas mixture passes through the bed of zeolite.

Abstract: The invention relates to a silver catalyst for the partial oxidation of ethylene with molecular oxygen in the gas phase to form ethylene oxide and a process for preparing ethylene oxide using this catalyst. The catalyst is superior to comparable catalysts of the prior art through an increased selectivity (at high activity) and/or a more favorable ageing behavior. The process for preparing ethylene oxide is distinguished by improved economics.