C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/628.5, 260/6
C07C 29/04 (2006.01) C07C 29/03 (2006.01) C07C 31/20 (2006.01) C07C 31/27 (2006.01)
Patent
CA 1255703
ABSTRACT OF THE DISCLOSURE A process for the preparation of water-soluble vicinal diols by means of a direct catalytic hydroxylation of the corresponding olefines with H202. An olefine possihly carry.ing functional groups inert under the reaction conditions, and whose corresponding vicinal diol is soluble in water, is made to react, under vigorous stirring, with H202 at a temperature between 0° and 120°C and at a pressure between 1 and 100 atmospheres, in a two-phase aqueous liquid/organic liquid system consisting or consisting essentially of an acid aqueous phase containing H202 and of an organic phase containing (1) said olefine; (2) possibly a solvent immiscible with the aqueous phase; and (3) a catalyst of the formula Q3XW4O24-2n wherein Q represents an onium (RRlR2R3M)+ cation, wherein M is chosen from among N, P, As and Sb, and R, Rl, R2 and R3, equal to or different from each other, represent hydrogen atoms or hydrocarbon groups having a total of from 20 to 70 carbon atoms; X is an atom of P or As; and n is an integer chosen from among 0, 1 and 2.
469918
Gambaro Mario
Venturello Carlo
Marks & Clerk
Montedison S.p.a.
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