摘要:
Lactic acid menthyl ester can be stabilized by addition of alkali metal carbonate and/or bicarbonate and/or alkaline earth metal carbonate and/or bicarbonate.
摘要:
A gear for motor vehicles provided with a positive-displacement pump for supplying a lubricating device and the control and activating devices of the gear. The positive-displacement pump is driven by the rotation of a drive motor and is provided with a suction throttle which adjusts the flow of lubricating oil such that a relatively constant flow is maintained over a varying range of rotational speeds of the drive motor. The invention provides the advantages that gear efficiency can be improved since high rotational speeds of the drive motor do not cause a excessive flow of lubricating oil.
摘要:
In the preparation of substituted 2-cyanocinnamic esters by the Knoevenagel condensation of cyanoacetic esters and carbonyl compounds, the reaction times for obtaining high yields can be considerably reduced by using C.sub.3 -C.sub.6 -monocarboxylic acids and ammonium compounds as catalysts.
摘要:
The present invention relates to antimicrobially active ω-cyclohexylalkan-1-oles of the following formula (I), to a method for producing said compounds and to the use thereof as antimicrobial agents for treating body odor, wherein R1 to R6 independently of one another denote hydrogen or a linear or branched alkyl radical having 1 to 12 carbon atoms, Ra and Rb independently of one another denote hydrogen, a linear or branched alkyl radical having 1 to 6 carbon atoms or a linear or branched alkoxy radical having 1 to 4 carbon atoms, and x is 0 or 1, wherein preferably the total number of carbon atoms in R1 to R6 is 18 or less.
摘要:
A process for the preparation of a (E,Z)-7,8-cyclohexadecen-1-one isomeric mixture is described, comprising the following step: partial isomerisation of (E,Z)-8-cyclohexadecen-1-one so that the (E,Z)-7,8-cyclohexadecen-1-one isomeric mixture is formed.
摘要:
Process for esterification of farnesol in an initial mixture comprising alpha-bisabolol, farnesol and optionally other components, with the following steps: 1. Preparation or production of the initial mixture, 2. Adding (i) a transesterification catalyst and (ii) one or more compounds of formula (B) R2YnCO2R1 (B) in which the following applies: R1 stands for an alkyl residue with 1 to 12 C atoms; R2 stands for hydrogen, an alkyl residue with 1 to 20 C atoms, a cycloalkyl residue with 5 to 20 C atoms, an aryl residue with 6 to 20 C atoms or a heteroaryl residue with 5 to 20 C atoms; and Y stands for CH2, CH(Me), CH(Et), C(Me)2, CH2—CH(Me), CH(Me)-CH2 or CH2—CH(Me)-CH2 and n stands for a whole number from 0 to 6; or R2 stands for a group CO2R3, R3 standing for an alkyl residue with 1 to 12 C atoms; and Y stands for CH2, CH(Me), CH(Et), C(Me)2, CH2—CH(Me), CH(Me)-CH2 or CH2—CH(Me)-CH2 and n stands for a whole number from 0 to 8, or Y stands for an optionally substituted phenyl or naphthyl ring with a total of at most four substituents on the ring, n=1 applying.
摘要:
The invention concerns a transmission (1) with automatic shifting capabilities and with three spider supported planetary sets (2, 3, 4), three brakes (5, 6, 7), and two clutches (8, 9) for the shifting of six forward moving gears and one reverse gear and having an input shaft (10) and an output shaft (11). In this way, the input shaft (10) is in continual connection with the sun gear (16) of the second planetary set (3) and the input shaft (10) is connectable to the sun gear (12) of the first planetary set (2) by means of the first clutch (8) and/or by means of the second clutch (9) is also connectable with the spider (15) of the first planetary set (2). Further, the sun gear (12) of the first planetary set (2) by means of the first brake (5) and or the spider (15) of the first planetary set (2) by means of the second brake (6) and/or the sun gear (20) of the third planetary set (4) by means of the third brake, are all connectable with the housing of the transmission.
摘要:
A process for the catalytic double bond isomerisation of alkenyl alkoxybenzenes [alkoxy-substituted (2-alkenyl)-benzenes] (with a non-conjugated double bond in the alkenyl group) of formula A in the presence of a catalytically active quantity of alkali and/or alkaline earth C1-C6 alcoholates to the corresponding alkenyl alkoxybenzenes [alkoxy-substituted (1-alkenyl)-benzenes] (with a double bond in the alkenyl group which is conjugated with the benzene ring) of formula B is described
摘要:
The invention relates to a process for the preparation of cyclohexyloxyacetic alkyl esters by hydrogenation of phenoxyacetic alkyl esters and to the use of cyclohexyloxyacetic alkyl esters as fragrances.