| 摘要 |
1285835 1,3-Cyclohexylene diisocyanates BASF WYANDOTTE CORP 28 Jan 1970 [5 Feb 1969] 4198/70 Heading C2C 1,3-Cyclohexylene diisocyanates are prepared by (a) contacting a solution of at least one 1,3- cyclohexanediamine represented by the formula in which each R is hydrogen or methyl, in an inert solvent with hydrogen chloride to form the dihydrochloride of the amine and (b) contacting the reaction mixture from (a) with phosgene at 0-250‹ C. to form the corresponding diisocyanate. The process may be carried out at superatmospheric pressure. The inert solvent may, for example, be an aromatic hydrocarbon which may be chlorinated, a saturated alkyl ester, a saturated alkyl ketone or a saturated alkyl ether. |
