Technology for the esterification and hydrogenation of adipic acid to produce 1,6-hexanediol
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This post was last edited by Fengye201506 on 2016-9-27 08:17. I possess the technology for the esterification of adipic acid and the hydrogenation to produce 1,6-hexanediol, as well as the corresponding catalysts; I am seeking partnerships or technology transfers. The technology employs a catalytic distillation continuous esterification process, with the esterification catalyst having a service life of at least 5,000 hours ； Gas-phase fixed-bed hydrogenation under mild conditions ensures a conversion rate of dimethyl adipate of over 99.0%, with a selectivity for 1,6-hexanediol of over 97.0%. The tonnage consumption of adipic acid is no more than 1.30 tons.
Is a scale of 1,000 tons per year sufficient?
A continuous esterification and hydrogenation method is employed. The technology is similar to 1,4-butanediol.
1,000 tons per year is also feasible, but the investment is relatively uneconomical, especially as it is somewhat difficult to select a suitable cyclic hydrogen compressor.
What is the reaction pressure? Is it gas-phase hydrogenation or liquid-phase hydrogenation?
4.0~6.0 MPa, gas-phase hydrogenation
For the copper catalyst, the operating conditions are the same as those used in the maleic anhydride method for BDO production; we have also conducted experiments on this