4 results about "Hexachlorobenzene" patented technology

The application discloses a kind of magnetic nano-enzyme microspheres and preparation method and application thereof, belong to the cross technical field of material, drug, rapid detection etc..The magnetic nano-enzyme microspheres take Fe3O4 microspheres as core, and platinum nanoparticles are in situ grown after being coated with dendritic mesoporous silica on the surface.The magnetic nano-enzyme microspheres of the application utilize magnetic response separation, high load content and enzyme catalytic amplification, greatly improve the detection sensitivity and signal strength, and are suitable for high-sensitivity detection of trace chloramphenicol and hexachlorobenzene.The qualitative detection cutoff value of chloramphenicol is 0.1 ng / mL, and the quantitative detection sensitivity is 0.0011 ng / mL.The quantitative detection sensitivity of hexachlorobenzene is 0.4 ng / mL.

The invention belongs to the technical field of organic chemistry, and particularly relates to a separation and recovery method of a mixed solution. In order to solve the problem of high energy consumption of a rectification separation mode in the prior art, the invention provides a separation and recovery method of a mixed solution, which comprises the following steps: transferring the mixed solution containing tetrachloroethylene, hexachloroethane, hexachlorobutadiene and hexachlorobenzene into a melt crystallizer, and carrying out programmed cooling by using the melt crystallizer until the temperature of the mixed solution is 25-100 DEG C, so as to obtain a mixed solution containing tetrachloroethylene, hexachloroethane, hexachlorobutadiene and hexachlorobenzene; solidifying the high-melting-point substance in the mixture onto a crystallizer to obtain a product crystal; transferring the liquid phase as residual liquid into a residual liquid tank; raising the temperature to 185-190 DEG C to sublimate and condense hexachloroethane to form hexachloroethane crystals; heating the remaining product crystals to 220-230 DEG C for melting, and discharging the remaining product crystals into a product tank to obtain a hexachlorobenzene solution; and carrying out rectification separation on the residual liquid to obtain a tower top light component tetrachloroethylene product and a tower bottom heavy component hexachlorobutadiene product. The highest operation temperature is 250 DEG C or below, and the energy consumption is low.

The invention discloses a method for degrading organochlorine pesticide residues by using endophytic bacteria separated from healthy ginseng. According to the method, an endophytic bacterium Pseudomonas poae nH121 obtained from healthy ginseng is utilized, and the strain can degrade quintozene and hexachlorobenzene after being fermented and can be used for removing quintozene and hexachlorobenzene compounds in an old ginseng field polluted by pesticides. The method is easy to operate, green, safe, efficient and economical, and a new method can be provided for removing organochlorine pesticide residues in the environment.

The invention relates to the technical field of standard substance preparation, in particular to a light oil chlorine element standard substance solution and a preparation method thereof.The preparation method comprises the specific preparation steps that 1, a composite purifying agent is dispersed in an ethanol water solution, and after ultrasonic dispersion, a composite purifying agent solution is obtained; step 2, mixing the mixed solvent and the composite purifying agent solution, adding ultrapure water until the total volume is 4-6 times of the volume of the original mixed solution, standing, separating out a solvent phase by a separating funnel, transferring into a brown bottle, and storing in a dark place to obtain a purified solvent; and step 3, dispersing hexachlorobenzene in a purification solvent, carrying out ultrasonic dispersion, and standing in a dark place to obtain the chlorine element standard substance solution. The chlorine content standard substance solution has the advantages of high determination accuracy, good uniformity and excellent stability, can keep the stability of the chlorine content for a long time, and is not easy to change due to the influence of environmental factors such as temperature and humidity.