Centre National De La Recherche Scientifique

Adisseo France Sas

Université Claude Bernard

Arkema Inc.

Jean-Marc Millet

Virginie Belliere-Baca

Stéphane Loridant

Patrick Rey

Pascaline Lauriol-Garbey

Jean-Luc Dubois

Robert Huet

Pavel Afanasiev

Thi Tuyet Nhung Nguyen

Raja Znaiguia

Phillippe Lacorre

Quyen Huynh

Manuel Baca

Thi Tuyet Nhung Dudesert

The invention relates to a method for preparing an olefine, a diene or a polyene, by catalytic conversion of at least one alcohol having a carbon chain of at least three carbon atoms and different from propan-2-ol, in the presence of at least one catalyst based of at least one phosphate of a metal or several metals M, M being chosen from among the 15 lanthanides (Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium), Yttrium, Scandium and Boron, and the applications of this method.

Method for producing an olefin by catalytic conversion of at least one alcohol

A method of preparing acrolein from glycerol or glycerine is disclosed. The method includes dehydrating glycerol or glycerine in the presence of a catalyst consisting of at least (a) a mixed oxide of zirconium and at least one metal, said metal being selected from niobium, tantalum and vanadium, or (b) a zirconium oxide and at least one metal oxide, the metal being selected from niobium, tantalum and vanadium, or (c) a silicon oxide and a mixed oxide of zirconium and at least one metal, the metal being selected from tungsten, cerium, manganese, niobium, tantalum, titanium, vanadium and silicon, or (d) a titanium oxide and a mixed oxide of zirconium and at least one metal, said metal being selected from tungsten, cerium, manganese, niobium, tantalum, titanium, vanadium and silicon.

Method for preparing acrolein from glycerol or glycerine

The disclosure concerns a method for preparing acrolein from glycerol, according to which a dehydration of the glycerol is carried out in the presence of a catalyst MWOA, wherein MWO represents a mixture of simple oxides and/or mixed oxides of tungsten and at least one metal M selected among zirconium, silicon, titanium, aluminium and yttrium, and A represents one or several Lewis base(s), one said Lewis base being of the formula B(R1)p(R2)q(R3)r, wherein B is an element selected among C, S, P, O, N and halides, R1, R2 and R3 represent, independently of each other, H, a C1-C6 alkyl group, O, OH or OR wherein R represents a C1-C6 alkyl group, and the sum of p, q and r varies from 0 to 4.

Method for preparing acrolein from glycerol

The invention concerns a method for preparing acrolein from glycerol or glycerine, wherein dehydration of the glycerol or glycerine is achieved in the presence of a catalyst based on zirconium oxide and which active phase consists in at least This method can be used for making 3-(methylthio)propionic aldehyde MMP, 2-hydroxy-4-methylthiobutyronitrile HMTBN, methionine and its analogs.

Process for preparing acrolein from glycerol or glycerin

The invention concerns a compound comprising a combination of two crystal phases. The first crystal phase corresponds to the formula: AEVMoPOHwherein A is an alkali-metal; E is Te, Sb or Bi; and 0&#x2266;a&#x2266;3, 0&#x3c;b&#x2266;3, 0&#x2266;c&#x2266;3, 0&#x3c;d&#x2266;13, 0&#x3c;e&#x2266;2, 0&#x2266;g&#x2266;3. The second crystal phase corresponds to the formula ZMoXOwherein: Z is selected among trivalent rare earths; X is selected among the elements V, Ga, Fe, Bi, Ce, Ti, Sb, Mn, Zn, Te; and 0&#x3c;g&#x2266;3, 0&#x2266;h&#x2266;3, 0&#x2266;i&#x2266;1. The indices f and j represent the number of oxygen atoms required for satisfying the relative valency and atomic proportions of the elements present. The invention also concerns the method for preparing said compound, and its use in particular as catalyst for oxidizing alkanes.

Preparing a compound comprising a combination of two crystal phases

The invention relates to a method for the production of acrylic acid from propane, in which a gas mixture comprising propane, water vapour and, optionally, an inert gas and/or molecular oxygen is passed over a catalyst, comprising a crystalline catalyst phase of formula (I) or (I') TeaMolVbNbcOx (I) Sba Mol VbOy (I&#x2032;), associated with a crystalline catalyst phase for activating the propane.

Oxidation of propane to give acrylic acid using catalysts in a mixture of crystalline phases

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Lyons, France

Jean-Marc Millet