Tungsten disulfide (as catalyst) in cracking (of hydrocarbons) at atmospheric pressure

Technical Report · Wed May 19 04:00:00 EDT 1943

OSTI ID:7297116

Free, G; Meier, H

The catalytic effects of tungsten disulfide (code-named K5058) on paraffinic hydrocarbons at atmospheric pressure and temperatures from 400/sup 0/C to 460/sup 0/C, in a porcelain tube are considered. The principal effect was a far-reaching aromatization of the middle-oil fractions to hydrogen gas and products held tightly to the catalyst. A much less predominant effect was a cracking of the paraffins to gasoline or gaseous hydrocarbons. Variations in boilingpoint of starting material seemed to make no difference in the results. Evidence for the predominance of aromatization over cracking came from properties of reaction products (compositions, iodine numbers, aniline points, specific gravity, etc.) and thermodynamic considerations. For example, in a contrastive pari of experiments, one using K5058 and the other using K6108 (Terrana), a known cracking catalyst, but each operating on 186 grams of pure cetane (hexadecane) at temperature of 460/sup 0/ for one hour with a throughput of 1.2 vol./vol./hr, the fifferences in results were significatn. For each mole of cetane introduced, K5058 produced 0.02 moles of gasoline, 1.6 mole of hydrogen, 0.84 moles of middle oil, 0.07 moles of ethane, 0.08 moles ethylene, 0.04 moles methane, and non propane or butane, whereas K6108 produced 0.43 moles of gaoline, 0.03 moles of hydrogen, 0.69 moles of middle oil, 0.02 moles of ethane, 0.01 moles ethylene, 0.04 moles methane, and 0.34 moles of propane and butane combined. In addition, K5058 gave a considerable amount (about 7% by weight) of coke-like precipitates which were not analyzed, but which were assumed to by polymerization or condensation products from olefins or aromatics; K6108 gave almost none of this material. 5 tables

• Research Organization: I.G. Farbenindustrie, Ludwigshafen (Germany)
• OSTI ID: 7297116
• Report Number(s): TOM-251-499-507
• Country of Publication: United States
• Language: German

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010406 -- Coal & Coal Products-- Pyrolysis & Cracking-- (-1987)
02 PETROLEUM
020400 -- Petroleum-- Processing
ALKANES
ALKENES
AROMATICS
AROMATIZATION
CARBONACEOUS MATERIALS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
CRACKING
CRYOGENIC FLUIDS
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
GASOLINE
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
HYDROGENATION
INFORMATION
IODINE NUMBER
LIQUEFACTION
LOW PRESSURE
NONMETALS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PYROLYSIS
SULFIDES
SULFUR COMPOUNDS
TABLES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN SULFIDES