4 results about "Arsine" patented technology

The invention provides a method for removing arsenic and antimony in a water body by using active base metal replacement. The method comprises the following steps: regulating the pH value of wastewater containing arsenic and antimony to be 0-3 by using an acid, adding active base metal powder and a complexing agent, stirring and reacting at a stirring speed of 100-600 revolutions per minute, and replacing at the temperature of 10 to 80 DEG C for 10-120 minutes, wherein in the wastewater containing arsenic and antimony, the content of As (III) is 0.1-10g/L, and the content of Sb (III) is 0.1-25g/L; the mass amount of the active base metal powder is 5-100g/L according to the volume of the wastewater; the mass amount of the complexing agent is 0.5-5g/L according to the volume of the wastewater; and the active base metal refers to one or a combination of more than two in iron, zinc and iron-zinc alloys according to an arbitrary ratio. According to the method disclosed by the invention, arsenic and antimony in the water body are effectively removed, toxic arsenic hydride and antimony hydride gases are avoided, and the process is simple, economical and environment-friendly.

The invention relates to a method and a device for continuously producing ultra-pure arsine. In a water environment, zinc arsenide is added into concentrated sulfuric acid under the control of a spiral feeder, and a plurality of reaction kettles are connected in parallel and alternately feed for production and discharge reaction liquid; crude arsine is obtained; high-boiling-point impurities of the crude arsine are frozen in a condenser through two-stage low-temperature freezing; arsine is alternately collected at low temperature, and is heated and gasified to provide a gas source for subsequent processes; after low-temperature cold trap collection is finished, crude arsine provided by heating passes through a two-stage low-temperature low-pressure rectifying tower to remove high-boiling-point and low-boiling-point impurities; the arsine obtained after rectification is adsorbed; the yield of arsine in the refining process is larger than or equal to 90%, and compared with a traditional process, the two-stage low-temperature low-pressure rectification process saves energy by larger than or equal to 25%. And filling the ultra-pure arsine product into a low-temperature negative-pressure steel cylinder group through a mass flow meter. The large-scale filling of the ultra-pure arsine is realized.