摘要:
A catalyzed process whereby a cyclic olefin is oxidized to produce an epoxide is disclosed. The inventive process which uses air, or molecular oxygen as the sole oxidizing agent, and which is catalyzed by a specifically structured metallosalen complex is characterized in its high selectivity and high turnover efficiency.
摘要:
Novel fuel cells based on the fast ion conductors, transition metal exchanged .beta."-alumina and other similar metals capable of undergoing a change in oxidation state, which are used as catalysts for the deep oxidation of hydrocarbon-type fuels.
摘要:
A catalyst and/or precatalyst for olefin oligomerization comprising one or more coordination complexes having one or more central palladium metal atoms. Each palladium atom is bonded to four ligand donor atoms. Two of the donor atoms are group 16 elements and two of the donor atoms are group 15 elements. Also provided are neutral or cationic coordination complex dimers, so that the two palladium atoms are both bonded to one or two donor atoms from group 16, and each palladium atom is bonded to two donor atoms from group 15. In some instances, each of the two group 16 donor atoms are oxygen and each of the four group 15 donor atoms are nitrogen.
摘要:
An active and selective hydrocarbon partial oxidation catalyst comprises an activated partially-reduced polyoxometallate, preferably niobium polyoxomolybdate, that is prepared from a suitable polyoxoanion, which has been exchanged with a suitable cation and activated by heating to an activation effective temperature in the presence of a suitable reducing agent such as pyridinium. C3 and C4 hydrocarbons may be partially oxidized selectively to acrylic acid and maleic acid.
摘要翻译:活性和选择性烃部分氧化催化剂包含活化的部分还原的多金属氧酸盐,优选铌聚氧钼酸盐,其由合适的多氧阴离子制备,其已经与合适的阳离子交换并通过在存在下加热至活化有效温度而被活化 合适的还原剂如吡啶鎓。 C 3和C 4烃可以部分地被氧化成丙烯酸和马来酸。
摘要:
An active and selective hydrocarbon partial oxidation catalyst comprises an activated partially-reduced polyoxometallate, preferably niobium polyoxomolybdate, that is prepared from a suitable polyoxoanion, which has been exchanged with a suitable cation and activated by heating to an activation effective temperature in the presence of a suitable reducing agent such as pyridinium. C3 and C4 hydrocarbons may be partially oxidized selectively to acrylic acid and maleic acid.
摘要翻译:活性和选择性烃部分氧化催化剂包含活化的部分还原的多金属氧酸盐,优选铌聚氧钼酸盐,其由合适的多氧阴离子制备,其已经与合适的阳离子交换并通过在存在下加热至活化有效温度而被活化 合适的还原剂如吡啶鎓。 C 3和C 4烃可以部分地被氧化成丙烯酸和马来酸。
摘要:
A catalyst and/or precatalyst for olefin oligomerization comprising one or more coordination complexes having one or more central palladium metal atoms. Each palladium atom is bonded to four ligand donor atoms. Two of the donor atoms are group 16 elements and two of the donor atoms are group 15 elements. Also provided are neutral or cationic coordination complex dimers, so that the two palladium atoms are both bonded to one or two donor atoms from group 16, and each palladium atom is bonded to two donor atoms from group 15. In some instances, each of the two group 16 donor atoms are oxygen and each of the four group 15 donor atoms are nitrogen.