Industrial experiences with instituting usage of RM10927. [Precipitation in preheater and separator]

Technical Report · Sat Aug 30 04:00:00 EDT 1941

OSTI ID:7307587

Schirrmacher,

When the Welheim plant of the Ruhroel G.M.B.H. (at Bottrop) found it would not be able to obtain more of the molybdenum catalyst RM11002, it changed to the iron catalyst RM10927 in the liquid-phase ovens. The starting material for the process was a 1:1 mixture of fuel oil and pitch or pitch distillate, with a total solid content of 24 to 26 percent and catalyst content of 0.2 to 0.3 percent. On the first day of the use of the new catalyst, trouble set in when the difference in pressure between the two ovens of each chamber began to mount, eventually reaching levels of about 40 atm gauge pressure, which was dangerous. Thus the plant stopped using the new catalyst and went back to use of some old catalyst still on hand; some chambers were stabilized but some were not and were shut down and investigated. Large amounts of asphalt-like precipitates were found in the preheater, and coke-like precipitates were found in the separator, but the ovens and cold tubes were clear of obstruction. Because of such a short operating time, no definite conclusions about yields using the new catalyst could be reached, but they seemed to be about 15 percent lower than those using the old catalyst at oven temperatures of 25.4 millivolts (about 483/sup 0/C).

• Research Organization: Ruhroel, G.m.b.H., Bottrop (Germany)
• OSTI ID: 7307587
• Report Number(s): TOM-8-24-28
• Country of Publication: United States
• Language: German

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403 -- Coal & Coal Products-- Hydrogenation-- (-1987)
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ASPHALTS
BITUMENS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL LIQUEFACTION
ELEMENTS
FUEL OILS
FUELS
HIGH PRESSURE
HIGH TEMPERATURE
HYDROGENATION
INTERFERING ELEMENTS
IRON
LIQUEFACTION
METALS
MOLYBDENUM
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PITCHES
PRECIPITATION
REFRACTORY METALS
SEPARATION PROCESSES
TAR
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS