PROCESS FOR PREPARING LOWER MOLECULAR WEIGH POLYHYDROXYL COMPOUND

Japanese Patent JPS53121712

A

A process is disclosed for preparing mixtures of low molecular weight polyhydroxyl compounds and hydroxyaldehydes and hydroxyketones by condensing formaldehyde hydrate with itself in the presence of (I) as catalyst a soluble or insoluble compound of a metal of the first to eighth sub-group or second to fourth main group of the Periodic System of Elements, optionally bound to a high molecular weight carrier, and (II) more than 10% by weight, based on formaldehyde, of one or more dihydric or higher hydric low molecular weight alcohols and/or higher molecular weight polyhydroxyl compounds. The pH of the reaction mixture is held at 5.5 to 9.0 until 5-40% conversion has occurred and is then lowered to between 4.5 and 8.0 (0.5-2.0 pH units lower). The reaction is then stopped by inactivating the catalyst.

ETOGARU MEERINGU
KUUNO BUAAGUNERU
HANSU PEETERU MIYUURERU
GOTSUTOFURIITO SHIYUNAIDERU

JP3617478A

October 24, 1978

March 30, 1978

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BAYER AG

A61K8/00; A61K8/34; A61K8/35; A61K8/37; A61K8/40; A61K8/86; A61K8/87; A61Q19/00; B01J31/00; C07B61/00; C07C27/00; C07C29/136; C07C29/141; C07C29/38; C07C31/18; C07C41/00; C07C43/04; C07C45/00; C07C45/75; C08K5/00; C07C47/19; C07C49/17; C07C67/00; C07C69/02; C07H1/00; C08G4/00; C08G6/00; C08G18/00; C08G18/32; C08G18/54; C08G65/00; C08G65/34; C08K5/06; C09K3/00; C09K3/18; C12N1/00; (IPC1-7): A61K7/48; B01J31/02; B01J31/04; C07C27/00; C07C29/14; C07C31/18; C07C31/20; C07C43/04; C07C45/00; C07C47/19; C07C49/17; C07C69/02; C08G16/00; C08G18/28; C08G65/34; C08K5/06; C09K3/00; C11D1/66; C12B3/12

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