| 摘要 |
PROBLEM TO BE SOLVED: To provide a preparation method of an alkali cellulose with very uniform distribution of the alkali and a high bulk density and to charge a large quantity of an alkali cellulose in a smaller reactor in the etherification step by increasing the bulk density of the alkali cellulose and to prepare a cellulose ether with excellent solubility. SOLUTION: A powder pulp obtained by grinding pulp is continuously supplied by a biaxial kneader, mixed with an aqueous alkali solution which is supplied through the same or another inlet simultaneously and continuously, mixed and consolidated in the kneader and discharged continuously through the outlast. The supply of the powder pulp is controlled by a metering feeder to supply a predetermined flow. The supply of the aqueous alkali solution is controlled by a metering pump such that the solution is continuously supplied to give a predetermined alkali concentration.
|
