3 results about "Alkane synthesis" patented technology

The invention discloses a preparation method of alkyl-substituted polyfluorinated aromatic hydrocarbon based on Hanus ester, and belongs to the field of organic synthesis. The invention solves the problems that the existing polyfluoroaryl substituted alkane synthesis substrate has large range limitation, needs metal catalysis, and needs harsh reaction conditions such as high temperature, no water, no oxygen and the like. The method comprises the following steps: uniformly mixing polyfluorinated aromatic hydrocarbon, alkyl-substituted Hanus ester, an Ir (dFCF3ppy) dtbpyPF6 photocatalyst, anhydrous potassium carbonate and an organic solvent, and then carrying out blue illumination reaction. The method is used for preparing the alkyl-substituted polyfluorinated aromatic hydrocarbon based on the Hanus ester.

The invention discloses a preparation method for controlling viscosity and density of environment-friendly chlorinated paraffin, raw materials are C14-20 environment-friendly paraffin and liquid chlorine, and the environment-friendly chlorinated paraffin is prepared under a heating condition by a photocatalytic chlorination method. According to the method, a multi-kettle continuous chlorination process is adopted, a raw material for synthesizing the environment-friendly chlorinated paraffin is from n-alkanes with the carbon chain length of C14-20, the environment-friendly chlorinated paraffin synthesized by the C14-20 n-alkanes is a mixture, and the viscosity and the density of the chlorinated paraffin-52 product are different according to the change of the proportion of each component in the production process of the raw material n-alkanes C14-20. The viscosity and density of the environment-friendly chlorinated paraffin can be accurately regulated and controlled through accurate blending of raw material components, fine control of the reaction process and optimization of product aftertreatment, the requirements that the viscosity ranges from 280 to 360, the density ranges from 1.25 to 1.27, the content of C13 and below chlorinated paraffin is smaller than 1000 ppm, the chromaticity is smaller than 50, and the product quality reaches the industry leading level can be met.

The application relates to a bidentate chelating amide embedded C 18 Preparation method of silica gel column filler and application thereof. The preparation method of the filler comprises the following steps: activating silica gel balls, embedding bidentate amide into C 18 alkane synthesis, bonding reaction steps. Different from the prior art, the bidentate amide embedded C 18 alkane is synthesized through nucleophilic substitution, the bidentate amide embedded C 18 alkane is bonded to the surface of silica gel, one functional group is connected to the surface of silica gel by two silicon-oxygen bonds at the same time, the hydrolysis stability of the silica gel is improved, the stationary phase density is increased, and the surface carbon loading is increased. The preparation method has the advantages of simple operation, mild reaction condition, specificity and high grafting rate. The chromatographic column can be hydrophilic and can be used under a wide pH value mobile phase, has good separation performance for different polar compounds, and is suitable for the field of drug detection.