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Return to Abstracts of Patents Return to Abstracts of Patents 500-749 Patent Abstracts579. ------. [DU PONT DE NEMOURS, E. I., & Co.] Catalyst for Methanol Synthesis. British Patent 301,109, no date. Schmidt, J., Das Kohlenoxyd, Akad. Verlagsgesell., Leipzig. 1950. p. 205. Double chromate of NH4 with Zn (Cd, Cu, Mg, Mn, Ag, Fe) after decomposition by heating and pretreating by washing with 10% acetic acid. |