| 摘要 |
1,148,969. 4,4<SP>1</SP> - Diamino - diphenylmethane. MOBAY CHEMICAL CO. 4 Aug., 1967 [5 Aug., 1966], No. 35943/67. Heading C2C. Diamino-diphenyl methane having at least 96% of the diamine present as the 4,4<SP>1</SP>-diamino compound is prepared by reacting aniline with formaldehyde in a molar proportion of from 1À4 : 1 to 6 : 1 in the presence of at least 0À25 mol of acid catalyst per mol of aniline to maintain the system in a single organic phase, for less than 30 mins. at 110-160‹ C. The preferred acid catalyst is hydrochloric acid. |
