- MDACH - MDACH METHOD FOR PRODUCING CIS- AND TRANS-ENRICHED MDACH

摘要

The present invention relates to a process for the preparation of a trans-rich MDACH characterized in that the MDACH starting mixture is distilled in the presence of an adjuvant. The trans-rich MDACH is distilled, the auxiliary agent has a molar mass of 62 to 500 g / mol, and a boiling point of 50 mbar each, cis-cis-2,6-diamino-1-methyl At least 5 ° C higher than the boiling point of cyclohexane, and o an organic compound having 2 to 4 functional groups independently of each other, which is an alcohol, a primary, secondary or tertiary amino group, the MDACH starting mixture being contained in the MDACH starting mixture (2,4-MDACH) and 0 to 100% by weight, based on the total amount of MDACH (= 2,4-MDACH and 2,6-MDACH) Wherein the MDACH starting mixture contains both 100% by weight of 2,6-diamino-1-methylcyclohexane (2,6-MDACH) and the MDACH starting mixture contains both cis-isomers as well as the trans- Comprises 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, based on the total amount of MDACH contained in the mixture Mixtures. The ratio of the trans-isomer in the mixture to the total amount of MDACH contained in the mixture is higher than the ratio of the trans-isomer in the MDACH starting mixture to the amount of MDACH contained in the MDACH starting mixture.