Merck company

Michael P. Thien/ Sc.D./ Senior Re.search Fellow, Merck Company, Inc. Member, American In stitute of Chemical Engineers, American Chemical Society, International Society for Pharmaceutical Engineering. (Selection of Biochemical Separation Proce.s.se.s)... 

Joseph M. Kulak, Novartis Consumer Health Division Edward J. Ryczek, Merck Company, Inc. 

Pyridine from Merck Company, Inc. was distilled and stored over potassium hydroxide pellets. 

The submitters used lithium wire (Merck Company, Inc.) (12 in. = 1 g.) cut into small pieces for addition to the ammonia solution. The checkers used a block of lithium cut into small pieces. 

E. Merck, Company brochure Dyeing Reagents for Thin Layer and I per Chromatography , Darmstadt 1980. 

E. MERCK Company literature Wasse/feste, wasserbenetzbare DC-Fertigschichten Kiesel-gel 60 W , Darmstadt 1985. 

We thank the Baron, J. T. Baker, Camag, Desaga, Macherey-Nagel and E. Merck companies for their generous support of the experimental work. 

Magnesium turnings were purchased from E. Merck Company, Inc., Darmstadt, Germany or J. T. Baker Chemical Company. 

The absence of water in the lithium bromide is of great importance. Traces of wrater lower the yield of product by 10-20%. LiBr-2 H20 (purchased from E. Merck Company, Inc., Darmstadt or City Chemical Corporation) was dissolved three times in anhydrous acetonitrile-benzene (1 1), and the solvents removed each time on a rotary evaporator. The lithium bromide was dried under high vacuum at 100° for 1 hour, ground to a fine powder with a mortar and pestle while still warm, and again dried at 100°, as above, for 3 hours. 

Triethylamine was purchased from the Merck Company, Inc. and distilled from calcium hydride. The checkers used triethylamine purchased from Aldrich Chemical Company. 

E. Merck, Company brochure "Dyeing Reagents for Thin-layer and Paper Chromato-j... 

Anhydrous iron(III) chloride was purchased by the submitters from Merck Company, Inc. The checkers obtained the reagent from Aldrich Chemical Company, Inc. The reagent was dried at 60-70° under reduced pressure for several hours before use. 

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