Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By addition of extraneous agent – e.g. – solvent – etc.
Patent
1998-07-20
2000-11-14
Griffin, Walter D.
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By addition of extraneous agent, e.g., solvent, etc.
585844, 585860, C07C 710, C07C 700
Patent
active
061472735
ABSTRACT:
Olefins may be separated from paraffins, particularly those having the same number of carbon atoms, more easily than by fractional distillation by contacting a feed containing both materials with an aqueous solution of silver nitrate and nitric acid. The olefins form water soluble complexes with silver and are recovered by heating the water to decompose the complexes, thereby producing an olefin concentrate. In the absence of nitric acid contaminant hydrogen reduces the silver to metal and causes it to form colloidal solids and acetylenes form explosive solid compounds with silver. The nitric acid prevents the formation of insoluble solids by hydrogen and causes the silver acetylides to decompose during the olefin recovery step. Carrying out multiple stages of extraction and recovery can produce very high purity olefin.
REFERENCES:
patent: 1977659 (1934-10-01), Watts
patent: 2289773 (1942-07-01), Gilliland
patent: 2498204 (1950-02-01), Francis
patent: 4174353 (1979-11-01), Marcinkowsky et al.
patent: 4328382 (1982-05-01), Alter et al.
patent: 4430205 (1984-02-01), Felsky
patent: 5057641 (1991-10-01), Valus et al.
"Selective Olefin Recovery," Richard Ranchas, Petrochemicals Spring 1997, pp. 117-122.
"Reaction of Olefins with Solid Cuprous Halides," by E. R. Gilliland, J.E. Seebold, J. B. FitzHugh, and P. S. Morgan, vol. 61, pp. 1960-1962 Aug. 1939.
"Thermodynamics of the formation of the Isobutene-Silver Ion Complex" A.N. Petron, O.N. Temkin, and M.I. Bogdanov; Russian Journal Physical Chemistry, 44(11), 1970. pp. 1574-1576.
"The Structure-Stability Relationship of the Metal Ion Complexes of Unsaturated Compounds. III; The Effects of Polar Substituents on the Silver Ion-Olefin Complexation." Takayuki Fueno, O. Kajimoto & Junji Furukawa. Bulletin of the Chemical Society of Japan. vol. 41-pp. 782-785 (1968).
"On the Ligand Exchange Equilibrium in the Propylene-Mercury (II) Complex, " I. Kaukii, R. Nakajima, & T. Hara, Bulletin of the Chemical Society of Japan, vol. 43, pp. 749-755 (1970).
"Thermodynamics of the Formation of a Silver Ion-Propene-Complex" A.N. Petron, O.N. Timpkin & M.I. Bogdanor, Russian Jouranl Physical Chemistry, 45(1), 1971, pp. 19-21.
"Coordination of Silver Ion with Unsaturated Compounds V. Ethylene and Propene," K. Trueblood & H.J. Lucas, Mar. 5, 1952.
"Solubility of Propylene in Aqueous Silver Nitrate, "I.H. Cho, D. L. Cho, H. K. Yasuda, & T.R. Maurade, J. Chem. Eng. Data 1995, 40, pp. 102-106.
"Separation of Ethylene from Ethane by Supported Liquid Membranes Containing Silver Nitrate as a Carrier," M. Teramoto, H. Matsuyama, T. Yamashiro, & Y Katayama. vol. 19, No. 5, 1986. pp. 419-424.
"Liquid Complexes of Lower Olefins with Anhydrous Metal Salts," by Alfred W. Francis, Oct. 19, 1950. pp. 3709-3715.
"The Coordination of Silver Ion with Unsaturated Compounds," by S. Winstein and H.J. Lucas, Apr., 1938, vol. 60, pp. 836-847.
Chandrasekharaiah M. S.
Jones, Jr. Edward M.
Stickney Michael J.
Griffin Walter D.
MC International Research
Nguyen Tam M.
Steele Patrick K.
Streets Jeffrey L.
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