摘要:
The present invention relates to a process in which a triglyceride is transesterified with an alcohol in the presence of a solid catalyst. In order to provide a process by means of which a triglyceride can be transesterified with an alcohol in the presence of a solid catalyst in relatively moderate reaction conditions with a good yield and at relatively high reaction rate, it is proposed that the solid catalyst comprises a zeolite X with an Si/Al atomic ratio of less than 1.2.
摘要:
A process for preparing telmisartan by reacting 2-n-propyl-4-methyl-6-(1′-methylbenzimidazol-2′-yl)benzimidazole with a compound of formula (IV) wherein Z is a leaving group, to obtain the compound 2-cyano-4′-[2″-n-propyl-4″-methyl-6″-(1′″-methylbenzimidazol-2′″-yl)benzimidazol-1″-ylmethyl]biphenyl, and subsequently hydrolyzing the nitrile function to obtain the acid function.
摘要:
The invention relates to a process for ketalizing triacetonamine by reacting triacetonamine and a hydroxyl derivative, for example, a mono- or polyhydric alcohol, with gaseous hydrogen chloride to give an open-chain or cyclic ketal.
摘要:
A method for providing a user interface in which a set of objects stored in the form of data is displayed as a sequential list. The method involves each of the objects being allocated a position in a graphical presentation displayed in addition to the sequential list, the position being taken as a basis for displaying the objects in the graphical presentation. A first user action selects a position in the graphical presentation, and the selected position is taken as a basis for selecting a subset from the displayed set of objects in the sequential list. The positions in the graphical presentation are allocated a metric, wherein it is possible to ascertain a measure of distance between two positions, and an object is included in the subset on the basis of the measure of distance between the position associated with the respective object and the selected position.
摘要:
A navigation system, in particular for a motor vehicle, for determining a route to a destination, wherein the navigation system includes an input device for alphanumeric input of the destination and a display for displaying changing information and includes a processing unit for displaying potential destinations in a representation of a map by means of the display during input of the destination.
摘要:
An apparatus and method for transferring encrypted useful data objects (NDO) to a first telecommunication terminal (TG1), wherein at least one encrypted useful data object is initially transferred from a switching component to the first telecommunication terminal. Time information (SABS) is transferred from the switching component to the first telecommunication terminal indicating up to which moment in time a rights object (RO) associated with the at least one encrypted useful data object will arrive. Once the rights object received by the first telecommunication terminal, the telecommunication terminal checks if the moment in time indicated in the time information has elapsed. If the moment has not elapsed, the first telecommunication terminal issues a signal relating to the receipt of a useful data object via a user interface.
摘要:
A side sill of a body of a motor vehicle of sheet metal shell construction is composed of a sheet metal outer shell and a sheet metal inner shell which are welded to one another. A rolled profile for stiffening can be inserted into the side sill from an open end side and can be fastened to the side sill. In this way, a side sill can be stiffened by assembling the rolled profile after the basic construction of the body of the motor vehicle.
摘要:
The present invention is directed to a process for the synthesis of monoalkylated C—H acidic methylene group-containing compounds, such as malonic esters, and malonic ester nitriles.
摘要:
A process for preparing 4-substituted 2,2,6,6-tetramethylpiperidin-N-oxy compounds (II) or mixtures of (II) and 4-substituted 2,2,6,6-tetramethylpiperidin-N-hydroxy compounds (III) where X+Y can be O or can represent a cyclic ketal with the radicals or can represent an open-chain ketal in which X═O—R and Y═O—R′, where R and R′ can be identical or different and can each be CH3, CH2—CH3, CH2—CH2—CH3, CH(CH3)—CH3, CH2—CH2—CH2—CH3 and CH2—CH(CH3)—CH3, by oxidizing corresponding 4-substituted 2,2,6,6-tetramethylpiperidines (I) with hydrogen peroxide in the presence of alkali metal hydrogencarbonate and/or ammonium hydrogencarbonate and in the presence or absence of a solvent, in which the reaction is carried out with the addition of Brönsted acids which have an acid strength greater than that of the hydrogencarbonate.