| 摘要 |
1318962 Purifying glyoxal and formaldehyde ROHM & HAAS CO 23 July 1970 [19 Aug 1969] 35735/70 Heading C2C [Also in Divisions C3 and C5] Glyoxal and formaldehyde are deacidified by use of a styrene/divinyl benzene polymer matrix anion exchanger in which the polymer contains pendant tertiary amine oxide groups. Traces of nitric acid acetic acid and an unspecified coloured acid are removed from the glyoxal, and formic acid is removed from the formaldehyde. |
