Autocatalysis in the formose reaction |
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| Authors: | R F Socha A H Weiss and M M Sakharov |
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| Institution: | (1) Department of Chemical Engineering, Worcester Polytechnic Institute, 01609 Worcester, Massachusetts, U.S.A.;(2) Institute of Chemical Physics, U.S.S.R. Academy of Sciences, 117334 Moscow, U.S.S.R.;(3) Present address: Mobil Research and Development Corp., 08540 Princeton, N. J., U.S.A.;(4) Present address: UNIDO, Planto Piloto de Ingeneria Quimica, Universidad Nacional del Sur, 12 de Octubre 1842, 8000 Bahia Blanca, Argentina |
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| Abstract: | It has been found that carbohydrates naturally present in ppm quantities in paraformaldehyde are the cause of the autocatalysis in the formose reaction of paraformaldehyde solutions. Paraformaldehyde sublimed into Ca(OH)2 suspension was not transformed to sugars by formose reaction, only to methanol and formate by Cannizzaro reaction. A minute trace of glycolaldehyde — 3 ppm — was sufficient to initiate conventional autocatalysis. A formose reaction scheme in which formaldehyde reacts only with sugars by aldol condensation but not with itself is proposed.
         ,      ,          ..   .  ,   Ca(OH)2,   ,  ,  .  — 3 .. — .  , , .
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