Detail of "625-55-8"

Reference

Concentration of formic acid

Concentration of formic acid. Yushko, L. V.; Shkurupii, G. I.; Chernichenko, V. A.; Karmazina, T. P.; Voitenko, N. V. (USSR). Vopr. Khim. Khim. Tekhnol., 69, 91-4 (Russian) 1982. CODEN: VKKCAJ. ISSN: 0321-4095. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 68 HCO2H [64-18-6] is concd. by esterification with MeOH, hydrolysis of MeO2CH in the presence of a cation-exchange catalyst and fractionation of a MeO2CH-MeOH-H2O mixt. in a column reactor with return of H2O to the hydrolysis zone and MeOH and MeO2CH to the esterification stage, extn. of HCO2H from its aq. soln. with iso-PrO2CH [625-55-8], and azeotropic fractionation of the ext. to give 96% HCO2H. An iso-PrO2CH-H2O heteroazeotrope from the fractionation column is directed into a settling tank, the aq. layer from which is fed into a column for sepn. of iso-PrO2CH while the iso-PrO2CH layer is recycled to the extn. stage. A phase equil. diagram is given for the iso-PrO2CH-MeO2CH-H2O system at 20°.

Carbonyl compounds

Carbonyl compounds. Tani, Koki; Saito, Kikutaro; Sato, Koji (Chisso Corp., Japan). Jpn. Kokai Tokkyo Koho JP 61267535 A2 27 Nov 1986 Showa, 7 pp. (Japan) CODEN: JKXXAF. CLASS: ICM: C07C045-54. ICS: C07C047-02; C07C047-21; C07C049-04; C07C049-203. ICA: B01J023-86; B01J037-18. APPLICATION: JP 85-102158 14 May 1985.There are some reagents with their cas registry numbers 625-55-8 and 1308-38-9 are used in this study. DOCUMENT TYPE: Patent CA Section: 23 (Aliphatic Compounds) Formate esters were converted to carbonyl compds. in vapor phase at 200-550° in presence of H-activated catalysts contg. Cu, Zn, and Cr oxide as principal component. Thus, Cu(NO3)2.3H2O 120, Cr(NO3)3.9H2O 100, Zn(NO3)2.6H2O 140, and Mn(NO3)2.6H2O 14 g were dissolved in 800 mL deionized water, mixed with 80 g diatomaceous earth, adjusted to pH 8.5 with 30% Na2CO3, filtered, washed with water, dried at 120°, calcined at 450° for 3 h, and pelletized to obtain the catalyst, which was activated with H before use. With N as carrier gas, 1-ethylpropyl formate (I) (80% purity) was vaporized at 230° and fed to the activated catalyst at 290° and flow rate 1.0 g/g catalyst.h together with 0.2 g vaporized H2O for 30 days to give 82% di-Et ketone with 92% conversion of I. .