Chemistry: electrical and wave energy – Processes and products
Patent
1992-03-03
1993-06-29
Niebling, John
Chemistry: electrical and wave energy
Processes and products
204 72, 204 59R, C05B 302
Patent
active
052231020
ABSTRACT:
Formaldehyde and/or methylal are made by the electrooxidation of methanol in an apparatus which is divided into the anode compartment and the cathode compartment by a cationic membrane made of a fluoropolymer and having pendant fluorosulfonyl or sulfonic acid groups, which is coated on one side with platinum applied by the impregnation-reduction method, said coating serving as the anode. The cathode may be a metal layer on the opposite side of the membrane or a separate metal cathode. When the separate metal cathode is employed, the cathode compartment contains a liquid electrolyte, which is a concentrated inorganic acid, preferably phosphoric acid. Within specifically identified temperature ranges, the yield of formaldehyde and of methylal can be optimized by controlling the mole fraction or partial pressure of methanol feed.
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Electrocatalytic Synthesis of Methyl Formate from Methanol on a Platinum-Bonded Solid Polymer Electrolyte Membrane, Otsuka et al., Feb. 3, 1986, 1986 Elsevier Science Publishers BV pp. 401-404.
Solid Polymer Electrolyte Water Electrolysis, Takenaka et al pp. 397-403.
Fedkiw, Jr. Peter S.
Liu Raymond
Trainham, III James A.
E. I. Du Pont de Nemours and Company
Mayekar Kishor
Niebling John
Steyermark Paul R.
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