Monoterpenes of the formulae: ##STR1## wherein X, Y and Y' are independently --CHO, --CO.sub.2 H or --CH.sub.2 OR, R being hydrogen or tetrahydropyranyl, and Y may be in E- or Z-form about the adjacent double bond have been isolated from agriculturally harmful acarids and then identified. They have fragrance of citrus-note and are bactericidally active against bacteria which may cause crop injury. Some of them are the first sex pheromones to be isolated from the acarids.

An alkali-metal benzoate is prepared besides benzyl alcohol from a contaminated benzyl benzoate reaction residue obtained in the oxidation of a monoalkyl-benzene compound with a gas containing molecular oxygen. The disclosed process provides for distillation of the contaminated benzyl benzoate in the presence of a basic substance and the resulting distillate is hydrolyzed using an alkali-metal base. In this way, the benzyl benzoate that previously could not be separated from certain tar componen...

A hydroformylation process for preparing dialdehydes from dienes by contacting a C.sub.6 -C.sub.10 diene in a reaction zone at a temperature of from about 20.degree. C. to about 250.degree. C. and a pressure of from about 15 psig to about 800 psig with hydrogen, carbon monoxide, and a catalyst containing rhodium, the ligand having the formula ##STR1## wherein: n is 1-4; each R is independently selected from hydrogen, alkyl, alkoxy, aryloxy, aryl, aralkyl, alkaryl, alkoxyalkyl, cycloaliphatic, ha...

The novel intermediate compound which can be efficiently utilized in the synthesis of carotenoid compounds based on the sulfone chemistry, the preparation method of the same, and the practical synthetic process for preparing .beta.-carotene by the use of the above novel compound are disclosed. The synthesis of .beta.-carotene is characterized by the double elimination reactions of the C.sub.40 compound containing both the benzenesulfonyl group and the group X (either halogen or ether), which can...

Extension for bottle dispenser, in particular for food product, having a stopper part (10) to be applied on the mouth of the bottle and provided with a spout (11) curved downwards, comprising in a single piece: a conduit portion (20) in continuation of the cavity of the spout (11) into which can be inserted with interference a vertical tubular cavity portion (21) into which converges the conduit portion (20), comprising an inner core (22) and coaxial outer cylindrical wall (23); a cladding porti...

Aldehyde derivatives of polyethylene glycols and methods of making thereof are disclosed. These aldehyde derivatives can be used to make polyethylene glycol-hydrazines, polyethylene glycol-thiols, polyethylene glycol amines, and branched polyethylene glycols. PEG aldehyde derivatives or other functional PEG derivatives prepared from PEG aldehydes are useful for protein conjugation and surface modification.

The invention relates to a method for the preparation of a pure alkali metal benzoate, specifically of a pure alkali metal benzoate from benzyl benzoate prepared by oxidation of an alkyl benzene compound, specifically toluene, with a gas containing molecular oxygen, besides benzyl alcohol. Very specifically the invention relates to a method for the preparation of sodium benzoate besides benzyl alcohol. For this purpose crude benzyl benzoate is subjected to a treatment with a reducing substance t...

Metallic lead is obtained from lead sulfide ores or concentrates by subjecting the concentrate to a drying step followed by halogenating the dried concentrate in a dry atmosphere at a temperature in the range of 90.degree. to about 120.degree. C. Thereafter the halogenated mixture is subjected to a water wash and leached with a brine solution. The brine solution is then filtered to separate elemental sulfur and residue from the solubilized lead halide, the latter being then crystallized and subj...

The present invention discloses a method for catalytic synthesis of oxygenate from alcohol. At first, a feeding material comprising at least one alcohol is provided. Next, a copper-containing catalyst is provided and the catalyst further comprises at least one metal element selected from the group consisting of the following: zinc, magnesium, and aluminum elements. Following that, a catalytic reaction of the feeding material over the copper-containing catalyst is carried out to synthesize at lea...

Radial self-aligning rolling bearing including an outer ring, an inner ring, and balls which are arranged to roll in the raceways of the rings, and also spherical rollers together as rolling elements, which are all guided in a cage. The balls are larger in diameter than the spherical rollers, so that the balls exclusively take up the entire bearing load when the bearing load is small and both the balls and the rollers take up a larger bearing load.