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|Section2= |Section3= }} Cyclohexanedimethanol (CHDM) is a mixture of isomeric organic compounds with formula C6H10(CH2OH)2. It is a colorless low-melting solid used in the production of polyester resins. Commercial samples consist of a mixture of cis and trans isomers. It is a di-substituted derivative of cyclohexane and is classified as a diol, meaning that it has two OH functional groups. ==Production== CHDM is produced by catalytic hydrogenation of dimethyl terephthalate (DMT). The reaction conducted in two steps beginning with the conversion of DMT to the diester dimethyl 1,4-cyclohexanedicarboxylate (DMCD). In the second step DMCD is further hydrogenated to CHDM. The cis/trans ratio of CHDM is differ according to the catalyst, 80:20 for Cu4Ru12 catalyst, 65:35 in case of the RuPt catalyst, 88:12 for the Ru-Sn catalyst ,〔 〕 30:70 in case of the copper chromite catalyst usually used in industrial processing.〔 〕 :C6H4(CO2CH3)2 + 3 H2 → C6H10(CO2CH3)2 :C6H10(CO2CH3)2 + 4 H2 → C6H10(CH2OH)2 + 2 CH3OH Byproduct of this process are 4-methylcyclohexanemethanol (CH3C6H10CH2OH) and the monoester methyl 4-methyl-4-cyclohexanecarboxylate (CH3C6H10CO2CH3, CAS registry number 51181-40-9).〔Peter Werle, Marcus Morawietz, Stefan Lundmark, Kent Sörensen, Esko Karvinen and Juha Lehtonen "Alcohols, Polyhydric" Ullmann's Encyclopedia of Industrial Chemistry, 2008, Wiley-VCH, Weinheim. 〕 Most of the commercial CHDM has cis/trans ratio of 30:70. The leading producers in CHDM are Eastman Chemicals and SK Chemicals. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「cyclohexanedimethanol」の詳細全文を読む スポンサード リンク
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