Diphenylmercury Synthesis

Constrained optimization of cellulose acetate membrane using two‐level factorial design

“…The experimentally determined performance of the membrane was, however, not as good as predicted by eqs. (5) and (6). The fact that two of the optimum conditions were found at their upper and lower levels (51 = 1, 5 2 = -1) indicates a possibility that the true optimum may be located outside of the tested region.…”

“…1 6~~ + 2 . 1 6~~ -0.162122 + 2.662123 + 0.34xfia + 0.172112223 (6) where each coefficient, evaluated from eqs. (2) and (3), lies within 95% confidence limits.…”

“…Loeb has evaluated salts of perchlorate other than magnesium perchlorate' and later tested solvents other than acetone. 6 the casting solution. Two significant advances in the formulation of CA membrane casting solutions, however, were simultaneously reported in 1965 by Sourirajan and Govindan8 and Manjikian et alg The former found that a membrane cast from a solution of 17% CA, 68% acetone, 1.5% magnesium perchlorate, and 13.5% water at -10°C gave higher permeate flux at a given level of salt rejection than that cast from the original Loeb-Sourirajan f~r m u l a .~ Meanwhile, Manjikian et al 9 reported a new formulation for membrane casting which contained 25% CA, 30% formamide, and 45% acetone, with casting being conducted at room temperature.…”