Abstract:
The present invention relates to the use of a compound of the general formula (I)
wherein R 1 is C 1 -C 4 -alkyl or -(C=O)-R 3 , R 2 is hydrogen, C 1 -C 4 -alkyl or -(C=O)-R a , and R 3 and R 4 , independently of one another, are selected from the group consisting of hydrogen and C 1 -C 4 -alkyl, a stereoisomer thereof or a mixture of stereoisomers thereof, as an aroma chemical, to aroma chemical compositions comprising at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, and to a method for preparing a fragranced ready-to-use composition, which comprises incorporating at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, into a ready-to-use composition. The present invention further relates to specific ethers and specific esters of the compounds of the general formula (I) and a method for their preparation.
Abstract:
The invention relates to a method for producing tetrahydrofurane and/or 1,4-butanediol and/or gamma-butyrolactone, in particular a method for producing tetrahydrofurane (THF) from succinic acid, which can be obtained by converting biomasses, by transforming the succinic acid into succinic acid anhydride and by hydrogenating the succinic acid anhydrides, by separating unwanted secondary components.
Abstract:
The present invention relates to a method for the production of adipic acid or at least a resultant product thereof. According to said method, muconic acid is hydrogenated with hydrogen in a reaction zone in the presence of at least one transition metal catalyst (K) and a water-containing liquid (A), the muconic acid being at least partially insoluble in the liquid (A) under the hydrogenation conditions.
Abstract:
The invention relates to a method for processing polymer solutions comprising N-methyl-2-pyrrolidone and a polymer, the polymer solution being hydrogenated in the presence of a hydrogenation catalyst using hydrogen. The invention also relates to the product that can be obtained by this method and to the use of said product for producing, in particular, polyarylene ether products.
Abstract:
The invention relates to a method for producing 1,6-hexanediol, a hexanediol having a nitrogen weight of less than 5 ppm being obtained. The invention further relates to 1,6-hexanediol having a nitrogen content of less than 5 ppm and to the use of said 1,6-hexanediol for producing polymers.