The present invention provides a continuous preparation method of cyclododecatriene including: preparing a reaction composition by mixing butadiene, a main catalyst, and a co-catalyst with a toluene solvent; and allowing the reaction composition to react at a reaction pressure higher than a vapor pressure of the butadiene, and a cyclododecatriene composition prepared by the continuous preparation method.

The present invention provides a continuous preparation method of cyclododecatriene including: preparing a reaction composition by mixing butadiene, a main catalyst, and a co-catalyst with a toluene solvent; and allowing the reaction composition to react at a reaction pressure higher than a vapor pressure of the butadiene, and a cyclododecatriene composition prepared by the continuous preparation method.

The present invention relates to the use as perfuming ingredient of a compound of formula ##STR00001##
in the form of any one of its stereoisomers or a mixture thereof, and wherein one dotted line represents a carbon-carbon single bond and the other a carbon-carbon double bond; and R represents a hydrogen atom or a C.sub.1-4 alkyl or alkenyl group; as well as to the perfuming composition and the consumer products containing said compound.

The present invention relates to the use as perfuming ingredient of a compound of formula ##STR00001##
in the form of any one of its stereoisomers or a mixture thereof, and wherein one dotted line represents a carbon-carbon single bond and the other a carbon-carbon double bond; and R represents a hydrogen atom or a C.sub.1-4 alkyl or alkenyl group; as well as to the perfuming composition and the consumer products containing said compound.

The present invention relates to a method for preparing a catalyst for selective hydrogenation of cyclododecatriene and a catalyst prepared by the preparation method. The method for preparing a catalyst for selective hydrogenation of cyclododecatriene of the present invention includes: (S1) preparing a ruthenium complex by reacting ruthenium chloride with formaldehyde; and (S2) adding triphenylphosphine to the ruthenium complex and then allowing a reaction to proceed.

The present invention relates to a method for preparing a catalyst for selective hydrogenation of cyclododecatriene and a catalyst prepared by the preparation method. The method for preparing a catalyst for selective hydrogenation of cyclododecatriene of the present invention includes: (S1) preparing a ruthenium complex by reacting ruthenium chloride with formaldehyde; and (S2) adding triphenylphosphine to the ruthenium complex and then allowing a reaction to proceed.

The present invention relates to a composite catalyst, preparation process thereof, and process for catalyzing the trimerization of butadiene using the composite catalyst. The composite catalyst comprises: (A) a titanium compound catalyst active component, (B) an organometallic compound co-catalyst component, (C) a sulfoxide compound catalyst-modifying component, (D) a monoester compound catalyst-modifying component, and (E) a solvent component. The composite catalyst has advantages of excellent selectivity, high catalytic activity, easy preparation and so on.

The present invention relates to a composite catalyst, preparation process thereof, and process for catalyzing the trimerization of butadiene using the composite catalyst. The composite catalyst comprises: (A) a titanium compound catalyst active component, (B) an organometallic compound co-catalyst component, (C) a sulfoxide compound catalyst-modifying component, (D) a monoester compound catalyst-modifying component, and (E) a solvent component. The composite catalyst has advantages of excellent selectivity, high catalytic activity, easy preparation and so on.

The present invention relates to the use as perfuming ingredient of a compound of formula

##STR00001##

in the form of any one of its stereoisomers or a mixture thereof, and wherein one dotted line represents a carbon-carbon single bond and the other a carbon-carbon double bond; and R represents a hydrogen atom or a C.sub.1-4 alkyl or alkenyl group; as well as to the perfuming composition and the consumer products containing said compound.

The present invention relates to the use as perfuming ingredient of a compound of formula

##STR00001##

in the form of any one of its stereoisomers or a mixture thereof, and wherein one dotted line represents a carbon-carbon single bond and the other a carbon-carbon double bond; and R represents a hydrogen atom or a C.sub.1-4 alkyl or alkenyl group; as well as to the perfuming composition and the consumer products containing said compound.