Preparation method for cyclohexane dimethanol having high trans content and cyclohexane dimethanol prepared thereby
AssigneeHanwha Solutions Corporation
InventorsJong Kwon Lee, Ki Don Kim, Eun Jeong Kim, Joo Hee Han, Ho Seong Nam
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Abstract
Provided is a preparation method for a cyclohexane dimethanol (CHDM), which can have a high trans content through particular conditions, additive addition, or reactant addition, which is controlled in a cyclohexane dicarboxylic acid (CHDA) hydrogenation reaction, and a cyclohexane dimethanol prepared thereby.
Claims10
A method for preparing cyclohexane dimethanol (CHDM) by performing a hydrogenation reaction of cyclohexane dicarboxylic acid (CHDA) in the presence of a catalyst and at least one selected the group consisting of from a homogeneous additive and a heterogeneous additive,
- wherein a weight ratio of the catalyst to the cyclohexane dicarboxylic acid (CHDA) is 1:1 to 1:5,
- the catalyst is selected from the group consisting of ruthenium (Ru), palladium (Pd), rhodium (Rh), platinum (Pt), tin (Sn), and nickel (Ni),
- the homogeneous additive is selected from the group consisting of ammonium bicarbonate (NH4HCO3), sodium hydroxide (NaOH), potassium carbonate (K2CO3), and sodium borohydride (NaBH4), and
- the heterogeneous additive is selected from the group consisting of zirconia, titania, ceria, and magnesia, wherein the heterogeneous additive is not carrier of the catalyst.
Dependencies are inferred from the claim text.