Abstract: The catalyst comprises one or more molybdates of trivalent metals chosen from Fe, Al, Ce and Cr and/or molybdates of bivalent metals chosen from alpha manganese molybdate, beta cobalt molybdate, beta nickel molybdate and the molybdates of Zn, Mg and Ca, and one or more promoter elements chosen from Se, Te, As, Sb, V, Nb, Sn, Pb and Tl homogeneously distributed within the crystalline structure of said molybdates with distortion thereof without creating new crystalline phases.

Abstract: Catalyst active in the oxidation of acrolein into acrylic acid, which comprises a silica or alumina support and from 15 to 80% by weight, with respect to the catalyst, of a catalytically active part having the following chemical compositionMo.sub.a V.sub.b W.sub.c Cu.sub.d X.sub.x O.sub.ywherein X is Cr, Mn, Fe, Co, Ni, Zn, Cd, Al or Sb and wherein for a=12, b ranges from 4 to 8, c ranges from 1 to 4, d ranges from 2 to 5, x ranges from 0 to 1 and y ranges from about 17 to about 72; said active part having an amorphous and bidimensional structure with an interplanar distance of 3.98 A and an IR spectrum with a broad band at 860 cm.sup.-1.

Abstract: Methyl acrylate alone or in mixture with acrylic acid is prepared by passing a gaseous stream containing methanol, acrolein and oxygen at a velocity of 5 to 50 cm/sec through a fluidized catalytic bed formed of spherical particles 15 to 100 .mu. in size, said particles comprising from 10 to 80 wt.% silica support, the remainder consisting of an active catalytic component defined by one of the general formulae:Mo.sub.a V.sub.b Me.sub.c O.sub.xMo.sub.a W.sub.d Me.sub.c O.sub.yMo.sub.a V.sub.b W.sub.d Me.sub.c O.sub.zwherein Me is Cr, Mn, Fe, Co, Ni, Cu, Zn, Ag, Cd, Au, Hg, Na, Ba, Ca, Ce, Bi, Th, U, Pb, Sb, Sn, P or B; and wherein a is a number from 6 to 12, b from 1 to 6, c from 0 to 5, d from 1 to 6, x from 20.5 to 58.5, y from 21 to 61.5 and z from 23.5 to 76.5.

Abstract: Methyl acrylate or a mixture of methyl acrylate with acrylic acid are prepared by passing through a fluidized bed of catalyst a gaseous mixture comprising acrolein, methanol and oxygen fed at the bottom of the catalytic bed. A further amount of methanol is fed at one intermediate point at least, between the top and bottom of the catalytic bed. The catalyst is defined by one of the general formulae:Mo.sub.a V.sub.b Me.sub.c O.sub.xMo.sub.a W.sub.d Me.sub.c O.sub.yMo.sub.a V.sub.b W.sub.d Me.sub.c O.sub.zWherein Me is Cr, Mn, Fe, Co, Ni, Cu, Zn, Ag, Cd, Au, Hg, Na, Ba, Ca, Ce, Bi, Th, U, Pb, Sb, Sn, P or B; and wherein a is a value from 6 to 12, b from 1 to 6, c from 0 to 5, d from 1 to 6, x from 20.5 to 58.5, y from 21 to 61.5 and z from 23.5 to 76.5.

Abstract: Acrylic acid is prepared by contacting an oxidation catalyst with a gaseous mixture containing acrolein, oxygen and methanol. A proportion by volume from 0.05 to 0.5% methanol and a molar ratio of acrolein to methanol from 10:1 to 100:1 are maintained in the said mixture the catalyst is defined by one of the general formulae:Mo.sub.a V.sub.b Me.sub.c O.sub.xMo.sub.a W.sub.d Me.sub.c O.sub.yMo.sub.a V.sub.b W.sub.d Me.sub.c O.sub.zWherein Me is Cr, Mn, Fe, Co, Ni, Cu, Zn, Ag, Cd, Au, Hg, Na, Ba, Ca, Ce, Bi, Th, U, Pb, Sn, Sb, P or B; and wherein a is a value from 6 to 12, b from 1 to 6, c from 0 to 5, d from 1 to 6, x from 20.5 to 58.5, y from 21 to 61.5 and z from 23.5 to 76.5. The reaction is carried out at a temperature not exceeding 320.degree. C.

Abstract: Ethylene oxide is prepared by oxidation of ethylene on a catalyst obtained by:A. impregnating particles of a subdivided inert support with a decomposable silver salt,B. drying said impregnated particles by heating to a maximum temperature not exceeding 160.degree.C,c. flowing through the dried particles a gaseous stream of superheated steam, the temperature being raised to a selected value from 270.degree. to 350.degree.C,d. gradually replacing the steam by air over a period of at least 1 hour with the temperature being maintained at said selected value, andE. maintaining the particles for at least 30 minutes under the stream of air, with the temperature being maintained at said selected value.

Abstract: An improved process for the production of acrolein from propylene and of acrylic acid from propylene or acrolein or mixtures of propylene and acrolein which essentially comprises catalytic oxidation of propylene and/or acrolein with oxygen or a gas containing molecular oxygen in the presence of an oxidation catalyst and of methanol in a quantity of from 0.01 to 1% by volume with respect to the total gaseous mixture of the reactants. Acrolein and acrylic acid are formed in the process at high conversion rates and selectivities.

Abstract: Silver-based catalysts suitable for the production of ethylene oxide are prepared by impregnating a granular support with a decomposable silver salt, drying the impregnated products, and finally heat-treating the dried product at a high temperature, in a gaseous atmosphere containing at least 1 % by volume of carbon dioxide.

Abstract: A catalyst suitable for the production ofAcrylonitrile from propylene or acrolein,Acrylic acid from propylene or acrolein, andAcrolein from propyleneComprising silver oxide and molybdenum oxide in a molar ratio of from about 0.1 to about 2.0.The catalytic reactions using this new catalyst are directed towards the desired end product by variation of the molar ratio of silver oxide to molybdenum oxide.