Givaudan Corporation

Givaudan-roure Corporation

Franz Etzweiler

Daniel Helmlinger

Mario Pesaro

Cornelius Nussbaumer

Norbert Neuner-Jehle

The present invention is concerned with novel odorant compositions which are characterized by a content of cyclic compounds of the formula ##STR1## From this group of compounds the compounds I' with the meanings b), d), f) and g) are novel compounds.

Cyclic compounds

The invention concerns novel odorants of formula I wherein R is hydrogen or methyl. ##STR1## The invention also concerns fragrance compositions containing I. Formula I is intended to particularly embrace as the racemates, (.+-.)-3.alpha.-acetyl-3.beta.,4.beta.,5,5-tetramethyl-2,3,4,4a.beta.,5,6, 7,8-octahydronapthalene and (.+-.)-3.alpha.-acetyl-4.beta.,5,5,-trimethyl-2,3.beta.,4,4a.beta.,5,6,7,8 -octahydronapthalene.

Acetyl-tri-and-tetramethyl-octahydronaphthalenes and fragrance

For admixing a gaseous substance, especially an odoriferous substance, into a gas stream. The gaseous substance is fed by means of a carrier gas (23) via a line (10) to a mixing chamber (1). The line contains at least one capillary (19), which is arranged in an advancing device (9) with two defined positions. In a first position the capillary extends through an opening (6), into the mixing chamber. In a second position the capillary opens outside of the mixing chamber in a suction removal space (25) surrounding the mixing chamber. Preferably the carrier gas is flowing continuously and suction removal means (26) are provided which remove the carrier gas together with the gaseous substance when the capillary opens in the suction removal space.

Apparatus for the admixing of gaseous or vaporous substances

The invention concerns novel odorants of formula I wherein R is hydrogen or methyl. ##STR1## The invention also concerns fragrance compositions containing I. Formula I is intended to particularly embrace as the racemates, (.+-.)-3.alpha.-acetyl-3.beta.,4.beta.,5,5-tetramethyl-2,3,4,4a.beta.,5,6, 7,8-octahydronapthalene and (.+-.)-3.alpha.-acetyl-4.beta.,5,5-trimethyl-2,3.beta.,4,4a.beta.,5,6,7,8- octahydronapthalene.

A device for branching gas flows, more particularly in a gas chromatography plant, the device having: an inlet branch connected to the output of a separating column; and two outlet branches which extend from a junction to subsequent parts of the plant, characterised in that one outlet branch is connected by way of a shutoff valve to a device producing a pressure lower than the pressure in the other outlet branch.

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Greifensee, Switzerland

Franz Etzweiler