Leaching Calculations. Note on Graphical Method

Abstract

The agreement in the Kcm equivalents lends considerable weight to the view that the viscosity method for determining the molecular weight of linear polymers is quite reliable when suitable solvents are selected and a reliable KCm value is employed. There still remains, however, a lack of certainty that in some cases a true molecular dispersion of the polymer exists in solution. In the case of polystyrene, however, the fact that the same viscosity is obtained using different solvents is evidence that complete molecular dispersion probably is obtained.The question as to the reliability of the osmotic method as compared to the viscosity method for molecular weight determination cannot be finally settled at this time. This

Ternary and quaternary composition diagrams: an overview of the subject

“…3(b)), despite the fact that. "The equilateral triangular diagram is but an adaptation of oblique coordinates for a particular purpose" (45). An equilateral triangle with scales drawn according to mode 4 is illustrated in reference (24), but reading of the composition is discussed in terms of mode 1.…”

“…In other cases it may be advantageous to use a non-isosceles right triangle, for example when expressing concentrations in terms of weight molarity (1,31) or if one wishes to expand one axis relative to another (23,24,45). The right triangular representation was first introduced by Roozeboom (39, 46).…”

“…According to Findlay (13) the use of a right isosceles triangle was suggested by Roozeboom (46) "but is not in general use." A detailed examination of the literature reveals an interesting fact: chemical engineers (11,(22)(23)(24)(25)45) and to a lesser extent, metallurgists (41), make frequent use of the right isosceles representation, in addition to the equilateral representation for a ternary system. On the other hand, there are only sporadic references to the use of the right triangle in the chemical literature, and chemists and geologists use the equilateral triangle almost exclusively.…”

The solvent extraction of oil from acorns

“…21/2 inch pitch, 1/8 inch width sprocket wheels, one is 5 inches in diameter with 32 teeth, the other is 6 inches in diameter with34 teeth, 1 54 inch length of 1/2 inch pitch sprocket chain, -78~T he operation of this unit was as fo1lowsa• The lower of the two five gallon drums (A) was filled with solvent• This solvent was pumped up to the_upper five gallon drum (A) and allowed to run by gravity into the extractor, entering at (P),. The flow was controlled according to the reading of the rotameter (E).…”