44results about How to "Meet separation needs" patented technology

A separation material based on silica gel substrate and preparation method thereof are provided. The separation material based on silica gel substrate is obtained by copolymerizing two or more silane reagents on the silica gel surface to form "non-polar / polar copolymerized stationary phase" and has the following formula, wherein NP denotes non-polar groups, which comprise C1-30 n-alkane groups, phenyl, and so on; P denotes polar groups, which comprise C1-12 n-alkane groups jointing with Cl, Br, CN, amino group, benzenesulfonic group, sulfonic group, carboxyl group, quaternary ammonium group, alcohol group, and so on. The preparation method of the above mentioned separation material comprises the following steps: acidification preprocessing of silica gel, hydrating, copolymerizing a mixture of non-polar silane reagent and polar silane reagent on the hydrated silica gel surface, filtering, washing, drying, and so on. The separation material of the present invention has both non-polar groups and polar groups, which can provide hydrophobic applied force and several kinds of polar applied forces, and thereby improve greatly the selectivity of separation and enrichment. The separation material obtained through the preparation method of the present invention has merits such as uniform and stable bonding groups on the surface, larger bonding amount and so on, and can be applied to liquid chromatogram chromatography and solid phase extraction.

The invention provides a gas chromatographic column and a preparation method used for the separation of volatile gas arsenic compounds, which belongs to the field of chemical detection technique and is used for solving the problem that the normal chromatographic column is not suitable for the separation of volatile gas arsenic compounds. The technical proposal of the invention is that the chromatographic column body is a flexible PTFE column body and the filling material is a power-shaped polysiloxane stationary phase of 80-100 meshes. The filling material is filled by a blowing positive-pressing filling method. The invention can meet the specific requirement of the separation of the gas arsenic compounds and has the advantages of strong plasticity, easy cutting, being convenient for being bent and good adaptability, can bear the low temperature of minus 196 DEG C and the high temperature of 200 DEG C, has outstanding performance of chemical corrosion resistance, and can realize the butting with collecting devices and detection devices conveniently. The blowing positive-pressing filling method provided by the invention has the advantages of convenience, simpleness, low requirementon the operation skillfulness, etc., with the filling density, column effect and repeatability completely meeting the separation requirement of the gas arsenic compounds.

The invention discloses a bonding type chromatographic column stationary phase and a preparation method thereof. Aryl bridged silsesquioxane is modified to the surface of a carrier silica gel by means of chemical bonding, the obtained chromatographic column stationary phase has a high specific surface area and narrow particle size distribution. The process route is simple, the raw materials are cheap and easily available, and the operation is convenient. Also, the chromatographic column stationary phase provided by the invention has a good separation effect on aryl compounds, and by changing different organic groups, different separation demands can be met.

The object of the present invention is to provide a multifunctional wide-flow high-efficiency gas-liquid separation device combining gravity and centrifugal technology, which includes a sleeve and a core tube. The inlet end of the core tube is located outside the sleeve tube, and the outlet end of the core tube extends into the To the inside of the sleeve, a support structure is set between the core tube and the sleeve, an impeller is installed in the core tube, a water retaining ring is set on the inner wall of the sleeve above the outlet end of the core tube, and a gas phase outlet is set at the upper end of the sleeve. The lower end is provided with a liquid phase outlet. The opening section of the present invention not only reduces the oscillation problem caused by the change of the gas-liquid two-phase flow pattern, but also enables the liquid phase to enter the annular descending space between the core tube and the casing as soon as possible, thereby improving the separation efficiency, preventing fatigue damage, and increasing the service life. The separation baffle can block the liquid droplets carried in the gas core and shunt them to the inner wall of the sleeve. The annular cavity formed by the water retaining ring and the inner wall of the sleeve can effectively prevent the liquid on the wall from rushing up too high and being carried by the gas. These structures The setting can effectively improve the separation efficiency.

The invention relates to the technical field of separation equipment, and discloses a wear-resistant hydraulic cyclone structure. The wear-resistant hydraulic cyclone structure comprises a cylinder body and a conical section; a discharging pipe is arranged at the lower end of the conical section, an overflow pipe is arranged in the center of the top surface of the cylinder body, a feeding pipe isarranged on the side surface of the cylinder body, an annular distributor is arranged on the outer side of the cylinder body, the feeding pipe is in communication with the side surface of the annulardistributor, a plurality of feeding branch pipes are uniformly arranged on the side surface of the cylinder body, the feeding branch pipes are distributed along the tangential direction of the cylinder body, and the outer ends of the feeding branch pipes are in communication with the annular distributor; a taper sleeve is arranged on the inner wall of the conical section, the upper end of the taper sleeve extends outwards to form a guide conical surface, the top angle of the guide conical surface is larger than the top angle of the taper sleeve, the upper end of the guide conical surface is fixedly connected to the upper end of the conical section, and a speed reducing cavity is formed between the conical sleeve and the inner wall of the conical section; and a plurality of flow guiding holes are uniformly distributed in the inner wall of the taper sleeve. The wear-resistant hydraulic cyclone structure has the beneficial effects of being resistant to wear and long in service life.