摘要:
The present invention relates to processes for bimetallic grafting, on a support material which is ceria (CeO2), zirconia (ZrO2) or a combination thereof, of (i) a combination of a metal element from Group 5 (V, Nb, Ta) or Group 6 (Cr, Mo, W), and a metal element selected from the group consisting of: Ru, Rh, Ir, Pd, Mn, Fe and Pt, or (ii) a combination of tungsten (W) with vanadium (V) or niobium (Nb). The present invention further relates to catalyst materials as may be obtained by such processes, and to the use of such catalyst materials as an ammonia selective catalytic reduction (NH3-SCR) catalyst for nitrogen oxides (NOx) reduction. The catalyst materials of the invention are of particular interest in providing improved NOx reduction performance in a low temperature range, notably 100°C to 250°C, particularly in the range of at least 130°C and at most 230°C.
摘要:
The invention relates to the use of a polymer P as antifoaming agent, the polymer P being a linear polymer prepared by polymerization of monomer chosen from monomer M1, monomer M2, or monomer Ml and monomer M2 monomer M1 having the following formula (I): wherein R1 and R2, independently of each other, is chosen from: - a benzyl, - a (C1-C12)alkyl group optionally substituted by a -O-(C1-C12)alkyl group, and - a (C3-C12)cycloalkyl group optionally substituted by a -O-(C1-C12)alkyl group, monomer M2 having the following formula (II): wherein R4 represents: a (C1-C12)alkyl group or a -CH2-O-R5 group, wherein R5 is chosen from: a benzyl, a (C1-C12)alkyl group optionally substituted by a -O(C1-C12)alkyl, and a (C3-C12)cycloalkyl group optionally substituted by a -O-(C1-C12)alkyl group, R3 represents a (C1-C12)alkyl group, or R3 and R4 form together, with the carbon atom bearing them, a ((C3-C12)cycloalkyl group.
摘要:
The present invention relates to a method for preparing a catalyst, and in particular provides a method for preparing a catalyst suitable for the polymerisation of ethylene and/or propylene, said catalyst comprising a compound of yttrium, neodymium or scandium supported on a silica support, and wherein the method comprises: a) Treating a silica support by heating at a temperature of at least 550°C, b) Contacting the treated silica support with a complex of the following formula: DmMX1X2R wherein M is selected from Y, Sc and Nd, R is a hydrocarbyl group, X1 and X2 are anionic groups, D is a neutral donor group, and m is 0 or greater.
摘要:
The invention relates to a process for the dimerization of conjugated diene compounds by a heterogeneous catalytic process using a supported palladium catalyst in the presence of at least one palladium activator and at least one palladium coordinating agent.
摘要:
The invention relates to a process for obtaining alpha-olefins by heterogeneous catalytic ethenolysis of optionally-functionalized unsaturated, in particular mono- unsaturated, olefins. The invention also relates to new supported catalysts that can be used in the process of the invention and to a method for preparing said supported catalysts.
摘要:
Dispositif pour la dosimétrie in vivo, comportant : • une sonde miniaturisée (1) comprenant au moins : - un matériau radioluminescent (3) émettant un signal de luminescence dont l'intensité est fonction du rayonnement haute énergie irradiant ledit matériau, - et une fibre optique (4) recevant le signal de radioluminescence et assurant sa transmission vers un système de détection de luminescence (14), • et un système de détection de luminescence, caractérisé en ce que le matériau radioluminescent est du nitrure de gallium GaN, émettant un signal de luminescence au moins dans une bande étroite BE, et en ce que le système de détection de luminescence (14) comporte un dispositif optique (18) permettant de sélectionner la bande étroite d'émission du nitrure de gallium.
摘要:
Methods and systems for performing a bioproduction process are described, the bioproduction process comprising the production of a cellular product by a cell population. The methods include the steps of culturing the cell population at least partially embedded in a hydrogel matrix forming a three-dimensional structure.
摘要:
L'invention vise un procédé in vitro pour déterminer si un échantillon contient un virus en réplication, ledit procédé comprenant la détection d'une activité protéasique Papaïne-like (PLpro) du virus.
摘要:
La présente invention porte sur un dispositif et sur un procédé pour détecter la présence d'au moins un ADN cible et/ou d'au moins un ARN cible dans un échantillon, en particulier dans un échantillon liquide.
摘要:
L'invention concerne un polymère dibloc composé d'un premier bloc et d'un second bloc, le premier bloc étant un copolymère statistique comprenant des unités d'un 1,3-diène et plus de 50% en mole d'unités éthylène, le second bloc étant un polyéthylène de température de fusion supérieure à 90°C et de masse molaire moyenne en nombre supérieure ou égale à 2 000 g/mol et inférieure ou égale à 10 000 g/mol. Un tel polymère dibloc présente une rhéologie améliorée par rapport à un copolymère statistique de même microstructure et de même macrostructure que le premier bloc du polymère dibloc.