Lotte Chemical Corporation

Seong Hwan Choi

Sung Joon Park

Mi Sun Cha

Young Heon Choi

Sung Min Kim

Young Jong Seo

Chan Yeong Yun

Seong Min Kim

Hyun Woo Park

The present invention relates to a method for preparing 1,3-cyclohexanedicarboxylic acid capable of exhibiting excellent activity, of enhancing the reaction efficiency and economic efficiency by using a catalyst having improved durability under the reaction conditions of high temperature and strong acid, of achieving excellent conversion rates by allowing most of reactants to participate in the reaction, and of obtaining products having high purity while minimizing by-products within a shorter period of time. The method for preparing 1,3-cyclohexanedicarboxylic acid may include: reducing isophthalic acid in the presence of a metal catalyst fixed to a silica support and containing a palladium (Pd) compound and a copper (Cu) compound in a weight ratio of 1:0.1 to 0.5.

Method for preparing 1,3-cyclohexanedicarboxylic acid

The present invention relates to a method for preparing high-purity 1,3-cyclohexanedimethanol capable of achieving a high conversion rate by allowing most of the reactant to participate in the reaction, and of increasing reaction efficiency and economic efficiency by further simplifying the reaction process, while minimizing by-products within a shorter period of time. Specifically, the method for preparing 1,3-cyclohexanedimethanol includes reducing 1,3-cyclohexanedicarboxylic acid in the presence of a metal catalyst, which is fixed to a silica support and includes a ruthenium (Ru) compound, a tin (Sn) compound and a platinum (Pt) compound in a weight ratio of 1:0.8 to 1.2:1.2 to 2.4.

Method for preparing 1,3-cyclohexanedimethanol

Disclosed are a composite metal catalyst composition capable of increasing efficiency and economic feasibility of a reaction through simplification of a reaction process, and providing 1,4-cyclohexanedimethanol with high purity for a shorter time while minimizing byproducts; and a method and apparatus for preparing 1,4-cyclohexanedimethanol with high purity using the same. The present invention provides a composite metal catalyst composition for converting an aromatic dicarboxylic acid into an alicyclic diol compound, the composition containing: a first metal catalyst including a palladium (Pd) compound; and a second metal catalyst including a ruthenium (Ru) compound, a tin (Sn) compound, and a platinum (Pt) compound, and a method and apparatus for preparing 1,4-cyclohexanedimethanol using the same.

Composite metal catalyst composition, and method and apparatus for preparing 1,4-cyclohexanedimethanol using same

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Daejeon, South Korea

Seong Hwan Choi