Merck + Co., Inc.

David D Saperstein

Seemon H Pines

Alan J Rein

The invention relates to the hydrohalide salts of L-.alpha. -methyl-3,4-dihydroxyphenylalanine (methydopa). The method of preparing these and related compounds in the absence of water or other polar solvents is also shown.

Preparation of hydroxyphenylalanine hydrohalide salts

Methanol is vaporized at a temperature of from about 200.degree. C.-455.degree. C. and passed over a cobalt molybdate catalyst or a doped cobalt molybdate catalyst at a flow rate of from 60-200 cc./minute. The effluent gas comprises essentially methane and hydrogen in addition to some water vapors and CO.sub.2.

Catalytic process for obtaining methane from methanol

A novel improved molecular sieve is prepared by a caustic wash process. The sieves so prepared show improved properties in reactions involving e.g., superior acid scavenging ability.

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Mountainside, NJ, United States of America

David D Saperstein