10 results about "Magnesium sulfite" patented technology

The present application pertains to processes for making calcium oxide and / or sulfuric acid from calcium sulfate. In some embodiments the processes comprise reacting a component comprising calcium sulfate with a second component comprising magnesium sulfite under conditions to form a solid comprising calcium sulfite and a solution comprising magnesium sulfate. Next, at least a portion of the solid comprising calcium sulfite is decomposed to form a second solid comprising calcium oxide, or calcium hydroxide, or cement, or clinker, or any combination thereof.

To provide a heavy metal insolubilizing material for insolubilizing heavy metal contained in a heavy metal contaminant (for example, incineration ash, soil, and drainage water), which can exhibit an excellent insolubilization effect to a plurality of kinds of heave metal (for example, arsenic and hexavalent chromium), in a short time (for example, 2 to 3 hours).SOLUTION: A heavy metal insolubilizing material contains an iron compound composed of either or both of ferrous sulfate monohydrate and ferrous chloride tetrahydrate, and a magnesium compound composed of one or more selected from the group consisting of magnesium sulfate heptahydrate, magnesium sulfate nonhydrate, and magnesium sulfite hexahydrate. A ratio of the iron compound in the total amount of the iron compound and the magnesium compound is 5 to 80 mass%. The heavy metal insolubilizing material can be prepared in a powdery form.SELECTED DRAWING: None

The utility model provides a desulfurized magnesium sulfite slurry cyclone. The desulfurized magnesium sulfite slurry cyclone comprises: a cyclone; the installation head is fixedly connected to the position, located at the top end, of the outer surface of the cyclone, one end of the installation head is fixedly connected with a feeding pipe, the other end of the feeding pipe is provided with a connecting pipe through a connecting disc, the other end of the connecting pipe is fixedly connected with a filtering pipe with a sealing cover, and the filtering pipe is fixedly connected with the cyclone. A filter plate is mounted in the filter pipe through a mounting buckle, and a butt joint pipe is mounted at the other end of the filter pipe. According to the desulfurized magnesium sulfite slurry cyclone provided by the utility model, by optimizing the structural design and adopting a new anti-blocking technology, the corrosion resistance of the cyclone is improved, the fine particle separation capacity is enhanced, and the blocking phenomenon is reduced, so that the operation stability of equipment is improved, the service life is prolonged, and the maintenance cost is reduced; and the recovery quality and efficiency of magnesium sulfite are improved.

The application provides a magnesium sulfite catalytic oxidation reactor, which comprises a tank body, a liquid suction structure, a liquid spraying structure and a pump body, wherein the liquid suction structure comprises a first liquid suction pipe, one end of the first liquid suction pipe extends into the bottom of the tank body, the other end of the first liquid suction pipe is connected with the pump body, and the end of the first liquid suction pipe in the tank body is provided with a filtering structure; one end of the liquid spraying structure is connected with the pump body, and the other end of the liquid spraying structure comprises a plurality of liquid spraying openings which extend into the tank body and are arranged close to the bottom of the tank body, and at least one of the liquid spraying openings is arranged towards the filtering structure. The oxidation reactor of the application increases the flow speed of slurry in the tank body, so that the slurry at the bottom of the tank body forms a turbulent effect, the catalyst is fully contacted with the slurry, and the catalytic efficiency is improved, and the problem of filtering structure blockage is effectively solved.

The invention provides a method for preparing manganese sulfate from low-grade pyrolusite based on sulfite circulation, a manganese-based material is prepared through the difference of the solubility of sulfite by utilizing the characteristic that the solubility of manganese sulfite is far smaller than that of calcium sulfite and magnesium sulfite, and manganese sulfate widely applied to the battery positive electrode industry is obtained. The by-product sulfur dioxide is used as a reducing agent to leach pyrolusite, the leaching cost is reduced, compared with a pyrite leaching method, the slag yield is reduced, recyclable ammonium sulfite is used as an intermediate manganese precipitation impurity removal agent, compared with an existing high-purity manganese sulfate preparation technology, the method is more efficient, the reagent cost is reduced, the quality of the prepared manganese sulfate is kept at the high-purity level, and the method is suitable for industrial production. The calcium and magnesium impurity removal effect is good, materials are simple, cost is low, recycling of main substances can be achieved, and environment friendliness is achieved.

The application relates to a sample processing method for cervical exfoliative cell PCR detection, which adopts a sample processing reagent, including a processing liquid, a protection liquid, a conversion liquid, a first purification liquid, a second purification liquid, a third purification liquid and a collection liquid. The processing liquid contains 0.1-0.5N sodium hydroxide and 4-8mol / L urea; the protection liquid contains 1-8mM guanidine isothiocyanate, 0.1-5% SDS, 5-150mM Tris-Hcl and 5-100mM EDTA; and the conversion liquid contains 100-500mM sodium bisulfite, 50-250mM ammonium sulfite, 2-15M ammonium bisulfite, 0.1-3M tetrahydrofurfuryl alcohol, 1-5mM TEPA and 0.1-2M magnesium sulfite. The sample is lysed and protected by the processing liquid and the protection liquid, direct conversion and detection are facilitated, processing time and steps are saved, DNA loss is reduced, cost is saved, the accuracy and reliability of detection results are ensured.

The invention belongs to the technical field of resource utilization of industrial by-products and preparation of inorganic functional materials, and discloses a method for preparing high-purity magnesium metavanadate based on synergistic conversion of the industrial by-products. Ammonium metavanadate extracted from a chlorination process titanium dioxide byproduct hydrochloric acid, a thermal power plant magnesium desulfurization byproduct magnesium sulfite and an aluminum oxide process is used as a raw material, and the method sequentially comprises the following steps: dissolving ammonium metavanadate in hot water, and acidifying with the byproduct hydrochloric acid to obtain an acidic vanadium-containing solution; adding a byproduct magnesium sulfite under heating and stirring, carrying out a deep impurity removal reaction, and carrying out solid-liquid separation to obtain a purified solution; adjusting the pH value of the purified liquid to be nearly neutral to initiate a synthetic reaction; directional crystallization is carried out by adopting programmed cooling and combining seed crystal induction; and separating, washing and drying to obtain the high-purity magnesium metavanadate. According to the method, synergistic high-value utilization of three industrial byproducts is achieved, the process is simple, the cost is low, the method is environmentally friendly, the purity of the obtained product is larger than or equal to 99.2%, the crystal form is regular, and the method is suitable for catalysts or electrode materials.

The invention discloses a miniaturized domestic sewage treatment device. The domestic sewage treatment device comprises a first anode, a first cathode, a second anode, a second cathode, a stirring unit and a post-treatment unit which are sequentially arranged from upstream to downstream, magnesium sulfite particles are arranged at the first anode, activated aluminum oxide is arranged at the first cathode, the first cathode is communicated with an external air source, the second anode adopts an iron electrode plate, a copper-doped anti-perovskite phase coating is loaded on the surface of the second cathode, and the post-treatment unit mainly comprises a stainless steel electrode pair and calcium carbonate particles. The treatment device is small in size, convenient to operate, short in treatment period and low in requirement for water quality fluctuation.

The invention relates to a production method for co-production of magnesium sulfate and manganese sulfate. The method has obvious advantages, uses magnesium sulfite waste as a raw material, cooperates with magnesium sulfate crystallization mother liquor circulation, greatly improves the resource utilization rate, and reduces the production cost. The manganese oxide mineral powder and the concentrated sulfuric acid are accurately proportioned according to a chemical equation in the reaction process, the reaction is efficiently carried out, the generation rate is improved, the sulfur dioxide generated by the reaction is absorbed and then manganese is recovered, and the resource waste and pollution are reduced. The O / A ratio is reasonably controlled through the extraction section, and precise separation of magnesium sulfate and manganese sulfate is achieved. Magnesium sulfate crystallization can select a cooling crystallization or acidification neutralization mode, and products are diversified; and manganese sulfate is subjected to multi-stage oil removal to ensure high purity. Tail gas treatment in the production process is proper, mother liquor is recycled, the environment-friendly and energy-saving targets are achieved, economic benefits and environmental benefits are considered, and sustainable development of the chemical industry is powerfully promoted.