The present invention relates to preparation process of precursor
fiber of
cellulose base carbon
fiber in chemical
fiber production. The preparation process includes mixing concentrated NMMO aqua and
carbon black for
carbon black water in the weight ratio of 20-10000, decomprssion
distillation to obtain NMMO /
carbon black solution with
water content 24-28 wt%, adding the mixtue of sliced
cellulose pulp and NMMO / carbon black solution in the weight ratio of 5-15 to 100 into dissolving reactor, swelling and stirring at 70-90 deg.c, raising the temperature to 90-120 deg.c, stirring and decomprssion
distillation to eliminate water and form
cellulose / NMMO / carbon black
spinning liquid with
water content of 12-14 wt%, and dry-wet
spinning to obtain the precursor fiber. The present invention has high carbonizing yield, high mechanical performance of the carbon fiber, raised spinnability of the
spinning liquid, non-toxic
solvent, high
solvent recovering rate and environment friendship.