61 results about "Selenic acid" patented technology

A Se-enriched plant growth regulator is an aqueous product prepared from the sodium (potassium or ammonium) selenate (or selenite) and the sodium (potassium or ammonium) salt of 5-nitroguaiacol, 2,4-dinitrophenol, or catechol. Its advantages are high chemical and physical stability, and high effect on increasing the content of organoselenium in grains of crops and promoting photosynthesis.

The invention discloses a method for separating and recycling sulfur, iron and selenium from selenic acid mud, which comprises the following steps: firstly, adding elemental sulfur soaked in keroseneinto selenic acid mud, filtering and separating hot kerosine containing the elemental sulfur and desulfurization slag containing selenium and iron; separating the elemental sulfur out after cooling the hot kerosene; secondly, adding the desulfurization slag containing selenium and iron to a mixture solution of sulfuric acid and sodium chlorate, filtering and separating oxidized leaching solution and residual slag containing iron, adding sodium sulfite and thiourea into the oxidized leaching solution sequentially, and finally obtaining coarse selenium and a solution after selenium sunk throughreduction. The total recovery rate of sulfur is 97- 98%, the grade of selenium reaches 92-93%, and the total recovery rate of selenium is 94-95%. The invention has the advantages of convenient operation, simple equipment and high value in application.

The invention discloses a method for transforming methane into other organic matters, which comprises the concrete step that the methane has oxidation reaction in acid media under the action of an oxidizing agent and catalysts, and is characterized in that the oxidizing agent is one of selenium trioxide, selenic acid, percarbamide, sodium percarbonate and peroxy-disulfuric acid; and the acid media are one, or a mixture of a few components of trifluoroacetic acid, trifluoromethanesulfonic acid, methanesulfonic acid, selenic acid and sulphuric acid. The method provides a novel oxidizing agent and the acid media, and has the advantages of easy control of reaction media and simple operation process.

The invention discloses a method for catalytically reducing selenium. According to the method, by using oxydol as a catalyst, a reducer is added into a hexavalent-selenium-containing solution to react so as to reduce the selenium into the selenium simple substance, wherein the standard oxidation-reduction potential of the reducer is lower than the standard oxidation-reduction potential in the process of converting the hexavalent selenium into the selenium simple substance. The hexavalent-selenium-containing selenic acid or selenate solution is reduced by one step to prepare the simple substance selenium product. The oxydol, which is used as the catalyst, effectively lowers the descending speed of the solution reduction potential on the premise of performing the catalytic function, so that the reduction reaction process is carried out mildly, thereby effectively preventing the selenium in the solution from overreduction to generate negatively bivalent selenium ions or compounds thereof, and solving the problems of low recovery rate and the like caused by selenium overreduction.

This invention discloses a solar battery film material of the CuIn(1-x)GaxSe2 preparation technology. This invention uses Cu,In,Ga metal salt and sub-selenic acid as main material, and the organic agent can dissolve in alcohols as electrolyte; and it uses metal molybdenum sheet or stainless steel sheet as cathode, platinum titanium metal net as assistant electrode, calomel saturated electrode as the vs-electrodes; the constant electric potential deposition prepares CuIn(1-x)GaxSe2 film front driving part, then it obtain CuIn(1-x)GaxSe2 film after cleaning, drying, heat dealing under argon. The advantage in this invention is that the material using rate is high, the technology is easy to control.

The invention discloses a suspension liquid-state iron-containing composite reagent as well as a preparation method thereof and a method for efficiently removing selenate in water and belongs to the technical field of water treatment. The method for efficiently removing selenate in water comprises the following three steps: step one, preparing the suspension liquid-state iron-containing composite reagent from zero-valence iron powder, water, hydrogen peroxide and hydrochloric acid; step two, removing selenate by using the suspension liquid-state iron-containing composite reagent, and integrally adding the prepared suspension liquid-state iron-containing composite reagent containing a solid phase, a colloidal phase and a liquid phase into selenate-containing water to be treated; and step three, carrying out solid-liquid separation. The suspension liquid-state iron-containing composite reagent has the advantages that the iron-containing composite reagent is simple to prepare and low in cost of raw materials, the iron-containing composite reagent contains a plurality of reduction active components, the removal of selenic acid through a reduction method is facilitated, and the iron-containing composite reagent is rich in colloidal phase and high in efficiency of transferring mass with solution, has both adsorption and flocculation effects, is capable of efficiently removing selenate, can still efficiently operate in the co-presence of anions such as high-concentration sulfate radicals and the like, is especially applicable to high-salt selenium-containing wastewater, is environmental-friendly, and is free of secondary pollution.

The invention discloses a novel selenic acid biological material with an anti-aging function, which is prepared by the following steps: taking arginine and SeO2 as raw materials, leading selenic acid-perssad into the arginine by utilizing a chemical synthesis method, and preparing a new organic selenium source. The selenic acid has an obvious anti-aging function, and is low-toxic and efficient, thus being served as a new supplemental se preparation to be used in the fields such as medicament, health-care products, cosmetics and the like.

The invention provides application of chitosan selenite in preparation of a medicament of treating liver cancer. Researches show that selenium is one of necessary trace elements in human bodies and animal bodies, and the selenium has remarkable prevention and treatment effects on multiple tumors. Chitosan [beta (1,4)-2-amino-2-deoxy-D-dextrose] is alkali biological polysaccharide in the natural world, carries positive electricity under the acid condition, can be neutralized with negative ions on the surfaces of tumor cells by adsorption and discharge to resist the growth of the tumor cells, has multiple biological activities such as tumor resistance, inflammation resistance, bacteria resistance and the like, has good biocompatibility, nearly has no toxicity and has no other adverse reactions; and the chitosan selenite is low molecular weight organic selenium prepared by adsorbing selenic acid radicals on chitosan monomers 2-NH2 and 6-OH, has stronger anti-tumor effect, and has lower toxic or side effect.