Communications from Dr. Diepenbruk (about the DHD Process at Poelitz)

Technical Report · Tue Jan 12 04:00:00 EDT 1943

OSTI ID:6502228

In the DHD process (dehydrogenation of gasoline under hydrogen pressure), an increase in the concentration of aromatics in the gasoline caused a disproportionate decrease in the degree of utilization of the installation because of the greater amount of coke which needed to be burned off the catalyst during the regeneration phase. Dr. Diepenbruk had suggested two possible ways to diminish the negative effects of increasing aromatics content of the gasoline: to lower the pre-distillation cutoff point and thereby send a greater percentage of the starting material through the DHD process or to raise the final distillation cutoff point of the product. The article was an evaluation of one of these suggestions by someone at Leuna. It was not yet known whether adopting the suggestions would cause a net decreased loss to gasification and thereby an increase in product yield. However, for certain gasolines (6434 gasoline, for example), it was known that a lowering of pre-distillation cutoff point (to less than 100/sup 0/C, as it would be) would cause increased gasification losses. In general, the author held Dr. Diepenbruk's suggestions to be doubtful in effectiveness. Finally, Dr. Diepenbruk had suggested in another matter that the refined by-product of toluene production should not be put into DHD gasoline, but put into VT gasoline or recycled back into the starting material for the DHD process; the reason was the low aromatic content of the by-product.

• Research Organization: I.G. Farbenindustrie, A.G., Merseburg (Germany)
• OSTI ID: 6502228
• Report Number(s): TOM-23-800000065-800000066
• Country of Publication: United States
• Language: German

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
02 PETROLEUM
020400 -- Petroleum-- Processing
AROMATICS
CHEMICAL REACTIONS
COAL LIQUEFACTION PLANTS
DEHYDROGENATION
DISTILLATION
EVALUATION
FUELS
GASOLINE
GERMANY
HIGH TEMPERATURE
HYDROCARBONS
INDUSTRIAL PLANTS
MEDIUM PRESSURE
MODIFICATIONS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PROCESSING
PRODUCTION
REFINING
SEPARATION PROCESSES
TOLUENE