The present invention discloses a metal complex catalyst, its preparing method and its application in preparing D,L-menthol, the metal complex catalyst includes weight percent elements as follows: 70-85% of Ni, 8-10% of Al, 5-10% of V, and 2-10% of Co. When this metal complex catalyst is applied in preparing D,L-menthol through thymol hydrogenation, it has the characteristics of high reaction activity and quick racemization of chiral compound. Meanwhile, a certain kind of alkali added in isomerization is the key to reducing light constituent byproduct. The whole process comes in good reaction selectivity, simple preparing technology, low production cost, and environment-friendly synthetic route.

A catalyst is provided. The catalyst includes a carrier and a metal. The carrier is represented by a formula: M.sub.xAl.sub.(1-x)O.sub.(3-x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal is loaded on the carrier. A method for manufacturing the catalyst is also provided.

A catalyst is provided. The catalyst includes a carrier and a metal. The carrier is represented by a formula: M.sub.xAl.sub.(1-x)O.sub.(3-x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal is loaded on the carrier. A method for manufacturing the catalyst is also provided.

The present invention discloses a metal complex catalyst, its preparing method and its application in preparing D,L-menthol, the metal complex catalyst includes weight percent elements as follows: 70-85% of Ni, 8-10% of Al, 5-10% of V, and 2-10% of Co. When this metal complex catalyst is applied in preparing D,L-menthol through thymol hydrogenation, it has the characteristics of high reaction activity and quick racemization of chiral compound. Meanwhile, a certain kind of alkali added in isomerization is the key to reducing light constituent byproduct. The whole process comes in good reaction selectivity, simple preparing technology, low production cost, and environment-friendly synthetic route.

The present invention discloses a metal complex catalyst, its preparing method and its application in preparing D,L-menthol, the metal complex catalyst includes weight percent elements as follows: 70-85% of Ni, 8-10% of Al, 5-10% of V, and 2-10% of Co. When this metal complex catalyst is applied in preparing D,L-menthol through thymol hydrogenation, it has the characteristics of high reaction activity and quick racemization of chiral compound. Meanwhile, a certain kind of alkali added in isomerization is the key to reducing light constituent byproduct. The whole process comes in good reaction selectivity, simple preparing technology, low production cost, and environment-friendly synthetic route.

The present invention discloses a metal complex catalyst, its preparing method and its application in preparing D,L-menthol, the metal complex catalyst includes weight percent elements as follows: 70-85% of Ni, 8-10% of Al, 5-10% of V, and 2-10% of Co. When this metal complex catalyst is applied in preparing D,L-menthol through thymol hydrogenation, it has the characteristics of high reaction activity and quick racemization of chiral compound. Meanwhile, a certain kind of alkali added in isomerization is the key to reducing light constituent byproduct. The whole process comes in good reaction selectivity, simple preparing technology, low production cost, and environment-friendly synthetic route.

A catalyst is provided. The catalyst includes a carrier and a metal. The carrier is represented by a formula: M.sub.xAl.sub.(1-x)O.sub.(3-x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal is loaded on the carrier. A method for manufacturing the catalyst is also provided.

A catalyst is provided. The catalyst includes a carrier and a metal. The carrier is represented by a formula: M.sub.xAl.sub.(1-x)O.sub.(3-x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal is loaded on the carrier. A method for manufacturing the catalyst is also provided.

This invention relates to a process for co-producing cyclohexanol and alkanol, including a cyclohexene esterification step and a cyclohexyl ester hydrogenation step. This invention further relates to a process for further producing cyclohexanone or caprolactam, starting from the co-producing process, and an apparatus for co-producing cyclohexanol and alkanol. The process for co-producing cyclohexanol and alkanol of this invention is environment-friendly, with low production cost and highly improved atom economy.

A catalyst is provided. The catalyst includes a carrier and a metal Pd. The carrier is represented by a formula: M.sub.xAl.sub.(1x)O.sub.(3x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal Pd is loaded on the carrier. A method for manufacturing the catalyst and a method for manufacturing a hydrogenated bisphenol A or derivatives thereof using the catalyst are also provided.