Method for producing cellulose acetate and cellulose acetate

摘要

It is an object of the present invention to provide cellulose acetate capable of producing a hollow fiber membrane having excellent salt removal ratio and water permeability. The total content of calcium and magnesium is 2.8 to 3.5 μmol / g, the viscosity of 6% is 40 to 80 mPa · s, the filtration degree Kw is 35 g ^-1 or less, the molecular weight distribution Mw / Mn is 3.00 or less, To 62.3%, cellulose acetate.