PATENTS

2208. ------ [MCKEEVER, C. H.] (Rohm & Haas Co.). Promoter in the Manufacture of Cobalt Carbonyl. United States Patent 2,477,554, July 26, 1949. Chem. Abs., vol. 43, 1949, p. 8108.

The Co to be converted as in United States Patent 2,477,553 (abs. 2207), is supplied as a toluene-soluble salt of an organic acid free of elements other than C, H, and O and nonbenzenoid unsaturation, and reaction is effected in an inert hydrocarbon solvent. Carboxylic acids with 6-22 C atoms are preferred. Thus, 50 ml. of a solution (3% Co) of Co nonanoate in C6H6-MeCOEt (4:1) and 2 ml. of a 6% solution of (I) in MeCOEt was autoclaved at 120° -125° and 2,500 p. s. i. of CO and H2 (1:1) to give a quantitative yield of (I) in less than 10 min. Co naphthenate in toluene-MeCOEt (4:1) and Co 2-ethylhexanoate in C6H6MeCOEt (6:1) similarly gave quantitative yields, the latter at 3,000 p. s. i. and 130° . Without (I) as promoter the latter run gave only 35% (I) in 3 hr. at 130° .