Detail of "13598-65-7"

Reference

Alcohols by hydrogenation of carboxylic acids

Alcohols by hydrogenation of carboxylic acids. Kitson, Melanie; Williams, Peter Sefton (BP Chemicals Ltd., UK). Eur. Pat. Appl. EP 198681 A2 22 Oct 1986, 22 pp. DESIGNATED STATES: R: AT, BE, DE, FR, GB, IT, LU, NL, SE. (European Patent Organization) CODEN: EPXXDW. CLASS: ICM: C07C029-136. ICS: C07C031-08; C07C031-10. APPLICATION: EP 86-302691 11 Apr 1986. PRIORITY: GB 85-9530 13 Apr 1985. DOCUMENT TYPE: Patent CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 23, 67 EtOH and PrOH are resp. prepd. by the hydrogenation of AcOH and CH3CH2CO2H in the vapor phase at elevated temps.Several reagents with their cas registry numbers 13598-65-7 and 7440-09-7 are used here. and 1-150 bar in the presence of catalysts comprising a Group VIII metal and Re. The catalyst may be modified by incorporation of an alkali metal and may comprise Pd and Re on a high surface area graphitized C where the av. Pd crystallite size is 30-99.9 ?. Thus, BK IV activated C was placed in a stream of Ar and heated to 1700° over 1 h, cooled to 25°, heated to 520° in air to give a wt. loss of 20%, heated in argon to 1800-1850°, and cooled to room temp. to give a support with BET surface area 710 m2/g. An aq. soln. of Pd nitrate was added to the treated C, the solvent evapd. under vacuum, the impregnated C dried overnight at 100° in a vacuum, cooled and transferred to a glass tube, heated in a stream of H from 30-280° for 6 h. After 10 h at 280° the catalyst was cooled under H, and then purged for several hours with N. The Pd/C was then mixed with an aq. soln. of Re2O7, the solvent stripped off, the catalyst dried overnight at 100° under a vacuum, producing a product having 2.5% Pd and 5% Re. AcOH was hydrogenated over the catalyst at space velocity ~1.1 kg feed/kg cat-h and 0.35 L feed/L cat-h, with a H-AcOH ratio of ~, at 217°/10.3 bars, producing a 52.1% conversion with 93% selectivity to the alc. .

Study of the status of rhenium in a rhenium oxide-silica gel system

Study of the status of rhenium in a rhenium oxide-silica gel system. Sventsitskii, E. S.; Sultanov, R. A.; Sanamyants, V. P.; Krupina, I. Yu.; Makhkamov, Kh. M. (Vses. Nauchno-Issled. Khim.-Tekhnol. Inst. Med. Prom., Moscow, USSR). Zh. Prikl. Khim. (Leningrad), 57(3), 508-13 (Russian) 1984. CODEN: ZPKHAB. ISSN: 0044-4618. DOCUMENT TYPE: Journal CA Section: 67 (Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms) In prepn. of catalysts by treatment of aq. 13598-65-7 and 12036-09-8 are also in the experiment. NH4ReO4 solns. with silica gel with subsequent drying, monomeric ReO4-, stabilized by Na+ ions, forms on the silica gel surface along with the microcryst. aggregates of NH4ReO4 which are weakly bonded to the surface. The monomeric ReO4- are chem. bonded with the support and on baking at >800° become incorporated into SiO2 bulk. Decompn. of NH4ReO4 leads to formation of fine particles of ReO2 which are stable till 700° and, at higher temp., are oxidized to volatile Re2O7. In catalyst prepn., it is recommended to pretreat silica gel with alk. solns. for the prodn. of finely disperse Re species. .