Report on tests of tip-filter using residue from Zeitz TTH-separator

Technical Report · Mon Mar 15 04:00:00 EDT 1943

OSTI ID:7178405

Engel, L; Eisenhut, A

In the TTH process as run at Zeitz, one of the steps was paraffin removal from the Abstreifer (an intermediate, viscous, liquid product) by filtration. Apparently a filtration-aiding material known as Filterhilfe A was used in the process; each batch seemed to have been used more than once, since Filterhilfe A appeared in the filtration residue and then in the residue left upon distillation to release most of the paraffin from the filtration residue. This report described tests run by Ludwigshafen on samples (from different days' operations) of this distillation residue from Zeitz to evaluate how well the effectiveness of the filter aid contained in the residue was being maintained through time, as compared to the effectiveness of fresh Filterhilfe A in paraffin removal. It was found that most samples of residue showed a drop-off of 35% to 47% in effectiveness, measured by the percentage of distillation residue in the filtration mixture which was necessary to give filtration residues of comparable properties to those given by 0.5% of fresh Filterhilfe A. Thus the Filterhilfe A seemed to have been damaged somewhat by the processing procedure at Zeitz; the report described suggested ways of distilling the paraffin from the filtration residue so as to damage the Filterhilfe A as little as possible. In testing the distillation residues before the filtration experiment, it was found that their content of high-molecular-weight waxlike materials increased with the number of times the residues had been recycled as filtration aids. It was suggested that such a buildup could be lessened by cycling part of the distillation residue back through the hydrogenation process each time. Finally, the report mentioned two types of asphalt which seemed to be comparable in effectiveness to Filterhilfe A as filtration aids.

• Research Organization: I.G. Farbenindustrie, A.G., Ludwigshafen (Germany)
• OSTI ID: 7178405
• Report Number(s): TOM-252-540-553
• Country of Publication: United States
• Language: German

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403* -- Coal & Coal Products-- Hydrogenation-- (-1987)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
010800 -- Coal
Lignite
& Peat-- Waste Management
ALKANES
ASPHALTS
BITUMENS
BY-PRODUCTS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION PLANTS
COAL LIQUIDS
DENSITY
DISTILLATION
ENERGY SOURCES
EVALUATION
FILTERS
FILTRATION
FOSSIL FUELS
FUELS
GERMANY
HIGH PRESSURE
HIGH TEMPERATURE
HYDROCARBONS
HYDROGENATION
INDUSTRIAL PLANTS
LOW PRESSURE
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
RECOMMENDATIONS
REMOVAL
RESIDUES
SEPARATION PROCESSES
TAR
TESTING