Anic S.p.a.

Agip S.p.a.

Renato De Simone

Edoardo Platone

Lucio Faggian

Morello Morelli

Vincenzo Redaelli

A process for preparing an alkaline metal salt of a polyethoxycarboxylic acid defined by the formula

Process for preparing alkaline metal salts of polyethoxycarboxylic acids

A chemical method for splitting the pyran ring of compounds such as 2,6,6-trimethyl-5,6-dihydro-4H-pyran is disclosed which consists in reacting the 4H-pyran derivatives concerned with water and a halogen-containing or halogen-donating catalyst at a comparatively low temperature, i.e. from 50.degree. C. to 130.degree. C. Interesting results are obtained and a selection field is afforded as regards the products of the pyran-ring cleavage.

Splitting up pyran rings

The invention relates to acetylenic glycols having the formula : ##STR1## wherein R is hydrogen or an alkenyl group, and to their derivatives obtained through hydrogenation or ethoxylation reactions, these compounds showing outstanding surface active properties. The invention relates also to the process for the preparation of the subject compounds starting from 6-methyl-5-hepten-2-one.

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Como, Italy

Renato De Simone