Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C7/00—Purification; Separation; Use of additives
  • C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
  • C07C7/163—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound by hydrogenation
  • C07C7/167—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound by hydrogenation for removal of compounds containing a triple carbon-to-carbon bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
  • C07C2523/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the iron group metals or copper
  • C07C2523/72—Copper

Definitions

• the catalytic hydrogenation conditions and catalysts generally suitable for the method of this invention are detailed in US. Pat. 2,426,604 (1947), the specification of which is hereby expressly incorporated by reference.
• the streams which are suitable herein as feeds comprise those which contain isoprene or butadiene-1,3, and other hydrocarbons, such as isobutane, isobutylene, n-butylene- 1, n butane and n-butylene-2; up to 1 weight percent of C acetylenic compounds, such as acetylene, methylacetylene, vinylacetylene, ethylacetylene, and the like; and, other hydrocarbon compounds such as alkanes and cycloalkanes, such as n-pentane, isopentane, neopentane, cyclohexane, and the like.
• the catalysts which are suitable for the process of this invention are prepared so as to contain between and 99.9 (preferably between and 97) percent by weight of copper and between 15 and 0.1 (preferably between 10 and 3) percent of another metal, the oxide of which is reducible to a lower valence state with hydrogen at temperatures below 550 C.
• metals include chromium, cobalt, manganese, nickel, vanadium, titanium, molybdenum, cadmium, zinc, silver, and the like, and also mixtures of such metals.
• the catalysts are preferably employed in dispersed form on a substantially inert carrier material such as aluminum silicate, brick, stoneware, pumice, porous silica, and the like.
• a substantially inert carrier material such as aluminum silicate, brick, stoneware, pumice, porous silica, and the like.
• this supported catalyst is prepared so as to contain from 10 to 30 percent by weight of the mixture of metals, but it may contain such metals in smaller or greater proportions.
• the above incorporated patent includes detailed instructions as to the various methods of preparing said catalyst.
• reaction conditions which are most suited for the method of this invention involve generally a 4 to 7 (preferably about 6) fold excess of hydrogen with respect to the concentration of acetylenes in the feed, and a space velocity of 300-1000, preferably about 600.
• the reactor was a glass tube (1.5 centimeters ID. by 10.5 centimeters long) with a 3 millimeter O.D. thermocouple well centered concentrically the length of the tube.
• the internal volume of the reactor was 18.5 milliliters. It was loaded with 9.827 grams of catalyst.
• the catalyst contained 14 weight percent copper and 0.7 weight percent nickel on a siliceous support.
• the reactor tube was inserted into a thermostatic heating unit, and the reactor brought to the indicated temperature.
• the feed stream ' was vaporized and mixed with hydrogen and carbon monoxide, and the mixture passed through the heated reactor.
• the efiiuent was condensed in a Dry Ice trap, the condensate being analyzed by gas liquid chromatography.
• acetylene concentration in the efliuent was generally about 5 times greater when the CO was not present during hydrogenation, concentrations as low as 7 p.p.m. being realized with the addition of CO.
• An isoprene-containing stream would have the acetylenic impurities therein selectively hydrogenated similarly as above.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Analytical Chemistry (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Water Supply & Treatment (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Applications Claiming Priority (7)

Publications (1)

Family

ID=27560858

Family Applications (1)

Country Status (8)

Cited By (10)

Families Citing this family (2)

• 1970
  • 1970-04-27 US US32378A patent/US3634536A/en not_active Expired - Lifetime
• 1971
  • 1971-10-08 CA CA124,816A patent/CA956655A/en not_active Expired
  • 1971-10-22 GB GB4926971A patent/GB1338268A/en not_active Expired
  • 1971-11-01 JP JP46086311A patent/JPS4852704A/ja active Pending
  • 1971-11-01 NL NL7115019A patent/NL7115019A/xx unknown
  • 1971-11-08 DE DE2155400A patent/DE2155400A1/de active Pending
  • 1971-11-12 BE BE775275A patent/BE775275A/xx unknown
  • 1971-11-15 FR FR7140781A patent/FR2161136A5/fr not_active Expired

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