4 results about "Methomyl" patented technology

This application discloses a methomyl production system. A filter cylinder is connected to the bottom of the methomyl reactor via a jacketed feed pipe and a methomyl concentrate pump. In operation, raw materials are added to the methomyl reactor and kept at a constant temperature for reaction. The resulting solution is then pumped through the jacketed feed pipe to the filter cylinder for filtration to remove excess activated carbon. The filtered solution is then transferred through the jacketed pipe to a methomyl crystallization reactor for crystallization at 2-60°C. The crystallized material is then fed into a filter press to remove moisture. Wastewater is discharged into a wastewater tank, and the material is dried in a dryer. When the liquid level in the filter cylinder reaches the high level, it is returned to the methomyl reactor through the jacketed reflux pipe. The use of hot water prevents crystallization of the synthesized compound in the filter cylinder, jacketed feed pipe, jacketed pipe, and jacketed reflux pipe. This production system can filter out activated carbon mixed in the synthesized material in the reactor, thereby improving the purity and quality of the finished methomyl product and ensuring its insecticidal effect.

This invention discloses a bismuth ferrite / bismuth vanadate photo-Fenton catalyst, its preparation method, and a wastewater treatment device, belonging to the field of wastewater treatment technology. This invention prepares the bismuth ferrite / bismuth vanadate photo-Fenton catalyst via a sol-gel method, which can solve the problem of Fe in traditional Fenton technology. 3+ / Fe 2+ In addition to addressing the technical problem of cyclic obstruction, the photo-Fenton catalyst of this invention has the characteristic of wavelength-selective degradation, which can generate different active species under light conditions with wavelengths <450nm and wavelengths >600nm respectively, thereby achieving segmented and efficient removal of different types of pesticides such as imidacloprid, paraquat, carbofuran, and methomyl from wastewater.

This invention relates to the field of environmental functional materials technology, specifically to a method for preparing a nitrogen-doped bimetallic biochar adsorbent and its application. The method uses grape pomace as biomass raw material, which is pretreated with HCl via hydrothermal treatment, then mixed with KOH, urea, and a bimetallic source solution. The nitrogen-doped bimetallic biochar adsorbent is prepared by oxygen-limited pyrolysis carbonization. The nitrogen-doped bimetallic biochar adsorbent prepared by this invention possesses high specific surface area, hierarchical porous structure, and magnetic separation characteristics. It exhibits excellent adsorption and removal effects on the carbamate pesticides methomyl and pirimicarb in water, with maximum adsorption capacities reaching 50.97 mg·g⁻¹, respectively. ‑1 and 159.50 mg·g ‑1 It exhibits good anti-interference ability and stability in complex aquatic environments and can be used for the treatment of pesticide-polluted water bodies.

The invention discloses compound sulfachloropyrazine sodium soluble powder as well as a preparation method and application thereof, and belongs to the technical field of veterinary drugs. Every 100 g of the soluble powder comprises 15-30 g of sulfachloropyrazine sodium, 4-8 g of methamprine, 6-12 g of a carrier I, 3-6 g of a carrier II, a surfactant, a metal chelating agent, an antioxidant and a filler. The preparation method is characterized by comprising the following steps: dissolving the methampheline and the carrier I in absolute ethyl alcohol, adding the carrier II for dispersion, heating for volatilization, cooling for solidification and drying to prepare the methampheline composite carrier solid dispersion; and mixing the sulfachloropyrazine sodium with sulfachloropyrazine sodium and other auxiliary materials to obtain a finished product. The dissolving and dispersing performance of the methampheline is remarkably improved through a solid dispersion technology, synchronous dissolution of the methampheline and the sulfachloropyrazine sodium is ensured, the preparation is good in water solubility and high in stability, and the excellent synergistic interaction effect and the animal growth promoting effect are shown in chicken and sheep coccidiosis prevention and treatment.