| 摘要 |
<p>An aqueous alkaline slurry of cellulose pulp is bleached with oxygen or a peroxide by using a compound represented by the following general formula (1) R1-O-[(C¿2?H4O)m/(AO)n]-H, (2) R?2¿-O-[(C¿2?H4O)m/(AO)p]-(AO)q-H, or (3) (R?3)¿t-X-[(C2H4O)m/(AO)p]-(AO)r-H as the bleaching assistant, wherein R1 is C6-C12 branched alkyl; m is an average number of molecules added of 4 to 15; A is propylene, butylene or phenylethylene; n is an average number of molecules added of 0 to 4; the repeating units in brackets are arranged at random or in block; R2 is C6-C12 linear or branched alkyl; p is an average number of molecules added of 0 to 3.9; q is an average number of molecules added of 0.1 to 4; R3 is hydrogen, methyl, ethyl or blanched C¿3?-C12 alkyl; t is an integer of 1 to 5; X is phenol residue; and r is an average number of molecules added of 0 to 4.</p> |
