1707. ------. [INTERNATIONAL HYDROCARBON SYNTHESIS CO.] [Synthesis Catalyst.] Italian Patent 382,942, no date. Schmidt, J., Das Kohlenoxyd, Akad. Verlagsgesell., Leipzig, 1950, p. 153.

Fe or Ni catalysts are slowly precipitated, 1 hr. or more, at < 40° .

See French Patent 863,473 (abs. 1654) and Netherlands Patent 55,196 (abs. 1682).