49results about How to "Reduce the concentration of metal ions" patented technology

The invention discloses a mask solution. The mask solution contains a moisturizer, wherein the moisturizer is prepared from sodium hyaluronate, trehalose, sodium polyglutamate, betaine, tremella polysaccharide and glyceryl polymethacrylate. The mask solution disclosed by the invention is capable of durably and deeply moisturizing the skin, is good in mildness, is also suitable for skin sensitive persons, is natural and non-toxic, is mild and non-irritant, cannot damage the skin after long-term use, has an obvious effect in improving the skin, and is beneficial for enabling the skin to restore elasticity and be glossy.

An apparatus and method for the electrolytic and electrodialytic removal of metal ions from wastewater in a single cell. A battery of cells, each of which consists of a cathode, anode, anion exchange membrane and cation exchange membrane, is used. The battery of cells may be used in both batch and continuous processes, and is capable of reducing metal ion concentration from thousand ppm to few ppm. It can be used to concentrate dilute acids as a by-product.

An electroplating method can securely and efficiently fill a plated metal into deep high-aspect ratio vias in a bottom-up manner without producing defects in the plated metal. The electroplating method includes: immersing a substrate, having vias formed in a surface, and an anode in a plating solution in a plating tank, the anode being disposed opposite the surface of the substrate; and intermittently passing a plating current at a constant current value between the substrate and the anode in such a manner that the supply and the stop of the plating current are repeated, and that the proportion of a current supply time during which the plating current is supplied increases with the progress of plating, thereby filling a plated metal into the vias.

A process for alkali washing of oil to remove acid, salt and metal ions features that the raw oil is washed by the alcohol solution of sodium hydroxide in a mixer which is divided into upper and lower layers by the dispersing medium. The alcohol solution of sodium hydroxide in upper layer is dispersed into microdrops by said dispersing medium and then reacts on the raw oil in lower layer. After separation, the pure oil is obtained.

The invention discloses a method for recycling hydrogenation catalyst waste. The method comprises the following steps: (1) alumina support waste and/or the hydrogenation catalyst waste are/is smashedand sieved, powder obtained after sieving is pulped, slurry with solid content being 15wt%-55wt% is obtained, a nitric acid-phosphoric acid-organic acid mixed solution is added with stirring, the obtained solution is heated to 65-100 DEG C, kept at the temperature for 30-90 min and cooled to room temperature, then organic amine is added, the solution is mixed uniformly, and sol slurry of the wasteis obtained; (2) the sol slurry of the waste in step (1), alumina powder and an extrusion aid are mixed uniformly, then mixed kneading, forming, drying and roasting are performed, and an alumina support is obtained; (3) an active component is supported on the alumina support, and a hydrogenation catalyst is obtained. With adoption of the method, the hydrogenation catalyst waste can be recycled effectively, wastewater and waste residues are not produced, pollution to the environment is avoided, and the catalyst prepared with the method has higher catalytic activity.

Provided herein is a system for producing suspensions comprising soluble metal ions. The system comprises a basket to hold a metal load comprising a permeable floor so as to allow a solution to come into contact with the metal load. The system further comprises a vessel within which the solution and the basket may be maintained while metal ions are leached from the metal load into the solution. Some embodiments of the present disclosure pertain to a system used to produce a suspension comprising copper ions. Additionally, provided herein are methods of using the system to produce suspensions comprising soluble metal ions. Some embodiments of the present disclosure pertain to methods of making suspensions comprising copper ions. The resultant suspensions comprising metal ions may be further modified to supply a pharmaceutically acceptable treatment.

An efficient multi-element organic fertilizer is prepared from the dregs of Chinese-medicinal materials as basic raw material, residuum of animal and plant, and life garbage through mixing and fermenting. Its advantages are high quality, durable action, high resistance to bacteria, pests and viruses, and no poison, odor and harm.

The invention belongs to the technical field of sewage treatment, and in particular relates to application of low-silicon micro-pore NaA type and NaX type molecular sieves in treatment of low-concentration heavy metal ions. The invention solves the problem that the concentration of the low-concentration heavy metal ions is not up to standard in primary treatment of sewage through selecting proper conditions to carry out exchange separation under the trace concentration; the concentration of the low-concentration heavy metal ions in the sewage, which is subjected to secondary treatment through the technology, is far lower than the industrial standard; and the application has the advantages of easiness in operation of exchange steps and conditions, and low cost, and is very suitable for a sewage treatment process in industry. Through regeneration, after the molecular sieves are exchanged, most of the absorbed heavy metal ions are replaced to sodium ions, and the regenerated molecular sieves are recycled. The NaX and the NaY related by the invention are obtained by hydro-thermal synthesis, and a ratio of silicon to aluminum is 1: 1-1: 3.

The invention relates to a process for producing cathode copper by low-grade anode plates. Low-grade high-nickel tin black copper is used as raw materials for direct electrolysis refining to prepare qualified cathode copper; through such modes as adjustment of process conditions, selection of reasonable current density, flow and temperature, adjustment of the additive ratio and adding of modifiedpolyacrylamide, the obtained cathode copper is higher in grade, smooth in surface, clear and compact in grain, uniform in thickness and beautiful; meanwhile, the purification and replacement period ofelectrolyte is prolonged, so that the production cost is greatly reduced when the recovery rate is increased; anode mud is treated by adopting ethyl acetate and phenolic resins, so that the problem of difficult gold and silver separation of the anode mud due to adding of polyacrylamide is solved, and the daily treatment quantity of the anode mud is increased; and copper sulfate crystal seeds areintroduced to accelerate separation of copper sulfate crystals, so that the recycling rate of metal copper and nickel is improved.

The present invention is drawn to chemical additives for use in extending the lifespan and efficiency of fuels cells such as proton exchange membrane fuel cells (PEMFC). In particular, additives can be added to the electrolyte solution of a fuel cell sufficient to reduce the concentration of and/or inhibit formation of precious metal ions in solution, e.g. platinum ions.

The invention relates to peanut fertilizer which is composed of the following components in parts by weight: 450-550 parts of urea, 100-120 parts of diammonium phosphate, 70-100 parts of potassium sulfate, 50-60 parts of ferrous sulfate, 60-72 parts of zinc sulfate, 60-70 parts of humic acid, 80-92 parts of nitro humate, 10-12 parts of EDTA-Zn, 10-12 parts of EDTA-Fe and 10-12 parts of EDTA-B. Compared with the prior art, the peanut fertilizer disclosed by the invention is reasonable in nutrient proportion according to a nutrient demand of peanut, and can improve a fertilizer utilization rate, improve soil structure and reduce agricultural cost.

The present invention relates to a water treatment method for implementing drinking water deep purification by utilizing immobilization biological ceramsite technology. Said water treatment method includes the following steps: (1), making the water to be treated undergo the processes of precipitation and filtration, then be fed into immobilization biological ceramsite tank; (2), making the water flowed out from said immobilization biological ceramsite tank undergo the process of ozonization treatment, then be flowed into secondary immobilization biological ceramsite tank; and (3), making the water flowed out from secondary immobilization biological ceramsite tank undergo the processes of microfiltration, secondary ozonization treatment and UV-ray sterilization so as to obtain the deep-purified drinking water.

The invention relates to the field of wastewater treatment. The invention discloses a process for reducing fluorine ion concentration in wastewater without using a medicament. The method comprises thefollowing steps: mixing the fluorine-containing wastewater generated in the solar cell production process with the reverse osmosis concentrated water generated in the solar cell production process, adding the fluorine-containing wastewater or the reverse osmosis concentrated water again to adjust pH to 7, and finally, carrying out standing overflow to obtain water of which the fluorine ion concentration content is less than 100 mg/L. Reverse osmosis concentrated water generated in the solar cell production process is mixed with fluorine-containing wastewater generated in the solar cell production process, so that the concentration of fluorine ions in the wastewater is reduced; meanwhile, the concentration of metal ions such as calcium and magnesium in the wastewater is also reduced, and the wastewater can be recycled.

The invention relates to the technical field of preparation of lithium ion battery precursor cobaltosic oxide, in particular to a preparation method of homogeneous-phase aluminum-doped small-particle-size cobaltosic oxide. According to the method, a composite complexing agent is adopted to balance the reaction rate of Co <2+> and Al <3+> in the system, so that Co <2+> and Al <3+> can be subjectedto homogeneous coprecipitation, and the purpose of uniformly doping aluminum is achieved, by adopting the composite complexing agent, the combination degree of the complexing agent and metal ions canbe effectively controlled, so that the concentration of the metal ions in the tail liquid is reduced. The particle size of the aluminum-doped cobaltosic oxide prepared by the method is 2.0-6.0 [mu]m,the morphology of the aluminum-doped cobaltosic oxide is spherical, the tap density of the aluminum-doped cobaltosic oxide is 2.6-3.0 g/cm <3>, and the mass percent of Al is 0.1-1.2%.

The invention provides a method and a system for recovering calcium and aluminum from aluminum industry sludge. The method for recovering calcium and aluminum from aluminum industry sludge comprises the following steps: 1) dissolving the aluminum industry sludge by using soluble alkali solution having a concentration of 2-3 mol/L to obtain a dissolution solution containing calcium and aluminum; 2)carrying out solid-liquid separation on the dissolution solution to obtain a filtrate containing calcium and aluminum; 3) carrying out electrodialysis on the filtrate by using a cation exchange membrane and an anion exchange membrane to respectively obtain a first mixed solution containing calcium and a second mixed solution containing aluminum; 4) recovering calcium from the first mixed solutionto obtain a calcium-containing product; and 5) adding a strong acid solution to the second mixed solution to make the pH value be 8.0-8.2, and subsequently carrying out solid-liquid separation, washing and drying to obtain an Al(OH)3 product. The method and the system have the advantages of high aluminum recovery rate, high purity of the recovered products, and significant economic, environmentaland social benefits when used to treat the aluminum industry sludge.

The invention relates to an electronic-grade pyrazole aqueous solution and a preparation method thereof. The content of metal ions such as Na<+>, Mg<2+>, K<+>, Ca<2+>, Cu<2+>, Zn<2+>, Ni<2+>, Cr<3+>, Al<3+> and Fe<3+> in the pyrazole aqueous solution is lower than 50 ppb, and the pyrazole content is larger than or equal to 10%. According to the method, the pyrazole aqueous solution is purified through a combined process of ionic membrane electrolysis and ion exchange resin, wherein the ion exchange resin is added into an ionic membrane electrolytic cell to enhance the conductivity of the solution and assist in removing metal ions. One part of metal ions in a pyrazole stock solution in an anode chamber are migrated to a cathode chamber from the anode chamber under the action of electric field force, the other part of ions are adsorbed by ion resin in the electrolytic cell, and finally the electronic-grade pyrazole aqueous solution is obtained in the anode chamber. The electronic-grade pyrazole aqueous solution can be used as a solvent of a chemical cleaning solution for microelectronic industries such as super-large-scale integrated circuits or screen displays.

The invention discloses a method for preparing electronic grade hydrazine hydrate by purifying hydrazine hydrate, relating to the technical field of chemical purification. The method comprises the following steps: enabling a commodity hydrazine hydrate to pass through chelate resin firstly with a system controlled to be 40-60 DEG C and then pass through a filter with a pore size of 0.05 mu m to obtain qualified electronic grade hydrazine hydrate; the chelate resin is formed by taking a crosslinked polymer as a skeleton and connecting with a special functional group with a -CH2N(CH2COOH)2 structure. The electronic grade hydrazine hydrate product prepared by the invention is extremely low in metal ion content, has appropriate particle sizes, does not have a color, has very good quality, andthus is fully applicable to the field of integrated circuits.

A cleaning method for improving a wafer surface polluted by metal ions is disclosed. This method is to install an ion change filter in a pipeline, in which deionized water runs, to reduce the number of metal ions to be less than 0.1 ppb, so as to avoid that the metal ions of deionized water remains on the surface of the wafer during the process in cleaning the wafer and diffuses in the thermal oxidation process afterwards to affect the quality of oxide film.

The invention discloses a method and device for maintaining the activity of electrolyte during the process of acrylonitrile electrolysis for preparing adiponitrile. The method comprises the following steps: introducing part of electrolyte to an iron-removing electrolytic tank, carrying out electrolysis to remove metal ions, and returning the electrolyte to the main circulation. The device comprises an iron-removing electrolytic tank and an electrolyte pump; the material inlet of the iron-removing electrolytic tank is communicated with the lower part or bottom of a gas-liquid separator through the electrolyte pump; and the material outlet of the iron-removing electrolytic tank is communicated with the middle part or upper part of the gas-liquid separator. The provided method and device can reduce the metal ion concentration of electrolyte, the precipitation of metal ions on the negative electrode is reduced, thus the yield of adiponitrile product is increased, the current efficiency is improved, and the continuous using time of acrylonitrile electrolytic tank is prolonged.