Some Granular Carbonaceous Adsorbents for Sugar Refining - A Study of Bone Char Replacements Based on Hydroxyapatite

Gas Adsorption and Surface Structure of Bone Mineral*

“…There is a decrease in the slope of the weight loss versus temperature curve in the region of 350-450°which in part justifies our use of 450°evacuation temperature to produce what we have called in other papers the "bare" surface. The above data on bone mineral are in qualitative agreement with the reported results of Barrett et al (1951a) for synthetic hydroxyapatite.…”

“…By these techniques it has been possible to deduce such properties as specific surface area, pore size distribution, and state of the adsorbing surface, whether energetically homogeneous or heterogeneous and whether polarizing or nonpolarizing. Rather extensive adsorption studies have been made on certain synthetic hydroxyapatites and bone chars (Barrett et al, 1951a(Barrett et al, ,b, 1952. With such experiments in mind it seemed to us that information supplementing the electron microscope and X-ray work might be obtained from adsorption studies on anorganic bone.…”

Granular Adsorbents for Sugar Refining - Some Physical Properties of Bone Char and Synthad

“…Limits average deviations from mean of 5 observations. 1 Present address, Shell Chemical Corp., New York, N. Y. The apparatus consisted of a fiat brass plate which could be maintained at about 211°F.…”

Chromatography and Analogous Differential Migration Methods

“…have been widely employed in columns, and with various methods of detection (24 , 34), for the resolution of mixtures. Examples are starch for amino acids (IS), Celite for derivatives of amino acids (270) and for organic acids (356), wool for enantiomorphic acids (37, 99), silica gel for organic acids (95, 228,234,260,356,382) and for organic bases (314), bone char (18) and cellulose (60) for sugars, calcium phosphate for proteins (345), clay for sugars (29), various absorbents for dyes and terpenes (284,370) and for carotenoids (9, 11, Columnar absorption has been employed for the examination of urine, including the detection of gentisic acid (256), porphyrins (258), hydroxytvramine (92), and ionone oxidation products (279). Celite serves for the fractionation of cytoplasmic components (293,294).…”