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Process for the preparation of linear hydrocarbons with more than 18 carbon atoms.

Patent Number: SU1295995

Inventor(s): Karl Dieter Froning and Klaus Morav

Applicant(s): Ruhrchemie AG (DE)

Requested Patent: SU1295995

Application Number: SU19833559504 19830303

Priority Number(s): SU19833559504 19830303

IPC Classification: C07C1/04; B01J23/78

EC Classification: B01J23/78, B01J23/86B, B01J23/89B, B01J23/89G4, B01J23/89G14, B01J23/89G18, C07C1/04D2B2, B01J23/847B

Equivalents: AU1189183, AU556070, CA1190249, DE3207743, ZA8301307

Application of 03.03.1983

Priority of ---

Published: 07.03.87 in B.I. No. 9


A catalyst is suggested for the production from synthesis gas of linear hydrocarbons having an average molecular mass of 725-840, a density of 0.912-0.96 g/см3, a solidification temperature of 100.5 - 102C, a dropping point of 113-122C, a flow temperature of 113.3-121.5C and a melting temperature of 94-117C. The catalyst contains the oxides of iron, copper and potassium and silica. In order to increase the catalyst selectivity towards linear hydrocarbons (CO conversion of 70.6-89.3%), titanium dioxide is added to the catalyst. The catalyst composition is as follows (wt. parts):

Iron oxide (expressed as iron) 100
Copper oxide 5-7.5
Potassium oxide 308
Silica 15-30
Titanium dioxide 7-9

Process for producing linear hydrocarbons with more than 18 carbon atoms by converting gas mixtures containing carbon monoxide and hydrogen with iron-containing catalysts at 150 to 350oC and 5 to 50 bars, characterised in that the catalysts in addition contain a readily reducible metal oxide, a difficultly reducible metal oxide, SiO2 , and an alkali metal oxide.