Set of rare earth catalysts produced by hydrothermal synthesis consists of reaction products of a salt, propylamine and dimethyl sulfate mixture washed with water and alcohol

The set of rare earth catalysts produced by hydrothermal synthesis comprises products of formula M(SO4)2H3O where M is a rare-earth cation. Also claimed is a process synthesizing the catalysts. The process reacts a mixture of a rare-earth salt, propylamine and dimethyl sulfoxide as a source of sulfate, with several days heating at autogenic pressure. The cooled products, filtered and washed with water and then alcohol, are advantageous in e.g. hydrogenation of olefins. The set of rare earth catalysts produced by hydrothermal synthesis comprises products of formula M(SO4)2H3O where M is a rare-earth cation. Also claimed is a process synthesizing the catalysts. The process reacts a mixture of a rare-earth salt, propylamine and dimethyl sulfoxide as a source of sulfate, with several days heating at autogenic pressure. The cooled products, filtered and washed with water and then alcohol, are advantageous in e.g. hydrogenation of olefins. (Machine-translation by Google Translate, not legally binding) Catalizadores de fórmula M(SO{sub,4}){sub,2}H{sub,3}O (M = catión de tierra rara) y su procedimiento de síntesis. Los compuestos objeto de la patente se han obtenido por síntesis hidrotermal por reacción de una mezcla de una sal de la tierra rara, propilamina y dimetilsulfóxido, como fuente de sulfato. Esta mezcla se calienta durante unos días a presión autógena. Después de este tiempo dejamos enfriar lentamente. Cuando alcanzamos temperatura ambiente abrimos el autoclave y filtramos los productos obtenidos, lavando con agua primero y luego con alcohol. Son sus aplicaciones en reacciones de hidrogenación de olefinas, y del grupo nitro, de compuestos nitroaromáticos y reacciones de oxidación de sulfuros.