HCHO is prepd. in high yield and selectivity by the dehydrogenation of MeOH in the presence of catalysts contg. metallic Na or >=1 Na compd. at 300-800 Deg. Na2CO3 was heated under H at 5 Deg/min and the temp. maintained during this heating process at 100 Deg, 500 Deg, 600 Deg, and 650 Deg for 3 h each, ending at 700 Deg, at which temp. the catalyst was maintained for 5 h. This catalyst (2 g) was charged into a reactor and contacted with 0.161 L/h of a 17% MeOH in N mixt., giving 20% MeOH conversion with HCHO formation in 65% selectivity. [on SciFinder (R)]
Title
Process and dehydrogenation catalysts for the production of formaldehyde from methanol
Date
1988
Publisher
(Hoechst A.-G., Fed. Rep. Ger.).
Note
CAN 110:193565
35-2
Chemistry of Synthetic High Polymers
Patent
written in German.
19881214
7440-23-5 (Sodium) Role: CAT (Catalyst use), USES (Uses) (catalysts, contg. indium, for methanol dehydrogenation in formaldehyde manuf.); 13770-61-1 Role: CAT (Catalyst use), USES (Uses) (catalysts, contg. sodium tetraborate, for methanol dehydrogenation in formaldehyde manuf.); 7440-74-6 (Indium) Role: CAT (Catalyst use), USES (Uses) (catalysts, contg. sodium, for methanol dehydrogenation in formaldehyde manuf.); 144-55-8 (Sodium hydrogen carbonate); 497-19-8 (Sodium carbonate); 1330-43-4 (Sodium tetraborate); 7631-95-0 (Sodium molybdate); 7632-05-5 (Sodium phosphate); 7757-82-6 (Sodium sulfate) Role: CAT (Catalyst use), USES (Uses) (catalysts, for methanol dehydrogenation in formaldehyde manuf.); 1312-43-2 (Indium oxide) Role: CAT (Catalyst use), USES (Uses) (catalysts, with sodium carbonate, for methanol dehydrogenation in formaldehyde manuf.); 67-56-1 (Methanol) Role: RCT (Reactant), RACT (Reactant or reagent) (dehydrogenation of, formaldehyde from, catalysts for); 50-00-0P (Formaldehyde) Role: IMF (Industrial manufacture), PREP (Preparation) (manuf. of, by methanol dehydrogenation, catalysts for)
Designated States R: BE, CH, DE, ES, FR, GB, IT, LI, NL.
A2
DE
87-3719055
19870606
Alternative title(s) :
(de) Verfahren zur herstellung von formaldehyd.
(fr) Procédé pour la fabrication de formaldéhyde.
(en) Method for the production of formaldehyde.
Other identifier(s)
EPO Family ID: 25856408
Record creation date
2006-04-18