3 results about "Chloropicrin" patented technology

The invention relates to the technical field of gas analysis, in particular to a determination method for detecting impurity elements in chlorine-nitrogen mixed gas by an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method. The invention establishes an analysis method for determining the contents of eight elements including iron (Fe), chromium (Cr), copper (Cu), zinc (Zn), nickel (Ni), sodium (Na), cadmium (Cd) and phosphorus (P) in chlorine-nitrogen mixed gas by an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) method. By optimizing ICP-MS analysis conditions and a sample pretreatment process and adopting an electronic-grade solvent to leach elements, rapid and accurate detection and high reproducibility of the impurity content in the chlorine-nitrogen mixed gas are realized. The method can be applied to quality control and analysis in the production process of a chlorine-nitrogen mixed gas product, and lays a foundation for establishing a standard of a chlorine-nitrogen mixed gas analysis method.

The utility model discloses a vibration screen limiting device for insect and mould killing machine belongs to technical field, including vibration subassembly, including mounting bracket, vibration screen body is provided with at mounting bracket top, fixed base is set up in mounting support top, is used for limiting and fixing to mounting bracket, be provided with second motor in the fixed base, second motor output is provided with the fixed part for fixing to mounting support, fixed base one side is provided with mounting plate, the effect is through setting fixed part and limiting portion, through the drive of first motor and second motor, the front and rear and left and right direction of mounting bracket of vibration screen body bottom are all limited and fixed, and the fixed base is fixed on the ground, so can effectively fix vibration screen body, prevent its whole from shaking in the working process, greatly increase its stability.

A method for extracting propionitrile from liquid chloropicrin includes the step of supplying a feed solution composed of liquid chloropicrin and a propionitrile solute dissolved therein. A liquid aqueous solvent that is immiscible with the feed solution is also supplied. The solvent absorbs at least a portion of the propionitrile solute from the feed solution, and the feed solution and the solvent are mixed to extract. Thereafter, the feed solution is separated from the solvent and the extracted propionitrile solute to produce a liquid extract and a liquid raffinate. The liquid extract contains the aqueous solvent and the propionitrile solute absorbed by the solvent, and the raffinate contains the feed solution from which the propionitrile solute has been extracted.