43 results about "Sodium arsenite" patented technology

The present application relates to pharmaceutical compositions and methods for treatment of urogenital diseases and bone metastasis in a human, which pharmaceutical composition contains an effective amount of arsenous acid alkaline or earth alkaline metal salt and / or a pharmaceutically acceptable adjuvant. According to the present invention, the alkaline arsenous acid metal salt is sodium meta-arsenita (AsO2Na) or potassium meta-arsenite (AsO2K). The effective amount of arsenous acid alkaline or earth alkaline metal salt is 0.0001-1500 mg / kg, preferably 1-1000 mg / kg, more preferably 1-150 mg / kg, and most preferably 50-100 mg / kg of body weight / day. The administration form of the pharmaceutical compositions of the invention is preferably oral, such as a tablet, capsule, powder and / or solution with a pharmaceutically acceptable carrier, diluent or excipient.

The invention relates to a method for analyzing arsenic in ore samples. The steps include: adding nitric acid and potassium chlorate to a certain amount of sample, adding sulfuric acid to continue heating and dissolving and evaporating until thick smoke of sulfur trioxide is emitted for several minutes, cooling, adding water to blow Wash, heat to dissolve, add copper sulfate, add hydrochloric acid, then add sodium hypophosphite until the Fe3+ yellow color completely fades, and then overdose, boil at this reducing acidity, and keep a certain slight boiling time to make the arsenic precipitate and condense; Filter the precipitate, wash the beaker and the precipitate with hydrochloric acid solution containing sodium hypophosphite, and then wash the beaker and the precipitate with ammonium chloride solution until the pH is 5; transfer the absorbent cotton ball to the original beaker, add buffer, starch solution, accurately add iodine standard solution, and drop sodium thiosulfate standard solution until the blue color disappears, which is the end point. The method avoids the use of highly toxic reagent sodium arsenite, reduces reducing acidity, and improves operating conditions. Direct titration of excess iodine solution with sodium thiosulfate does not require repeated titration of standard solution, the result is accurate and reliable, and is more suitable for the analysis and determination of process samples.

The invention provides a method for recycling high-purity tellurium from arsenium-containing and tellurium-containing smoke and preparing high-purity tellurium, and relates to production for comprehensively recycling valuable elements, such as arsenium, tellurium and lead, from the arsenium-containing and tellurium-containing smoke and harmless recycling processing of the arsenium. Oxygen pressure leaching is conducted on caustic alkali, leaching residues are rough sodium pyroantimonate, leachate is neutralized through sulfuric acid, the neutralized liquid is selectively reduced, the reduced liquid is a pure sodium arsenite solution and is used as a raw material of zinc sulfate solution arsenic salt purification and cobalt and nickel removal, reduction residues and neutralization residues are subjected to hydrogen reduction and vacuum distillation, and the high-purity tellurium with the purity being 99.999% or above is obtained. The arsenium and the tellurium are leached out from the smoke, while stibium, lead, bismuth, tin and the like are reserved in dearsenification residues as much as possible, the pure sodium arsenite solution is obtained through leachate purification and is used as the raw material of zinc sulfate solution arsenic salt purification and cobalt and nickel removal in zinc hydrometallurgy, harmless recycling of the arsennium is achieved, and valuable elements such as the stibium, the lead, the bismuth and the tin are recycled. The method is high in resource utilization rate and wide in raw material application range and solves the problem of pollution in the extraction process of the traditional process.

The invention relates to alkaline leaching liquid containing arsenic, tellurium, lead and tin, in particular to a method for obtaining high-purity tellurium from arsenic-containing alkaline leaching liquid. The alkaline leaching liquid is leaching liquid obtained after oxygen pressure alkaline leaching treatment of high arsenic and antimony smoke. The alkaline leaching liquid is neutralized through sulfuric acid, neutralization solution selective reducing is conducted, and the liquid obtained after reducing is a pure sodium arsenite solution and is used as a raw material for purification and removal of cobalt and nickel through zinc sulfate solution arsenic salt; and reducing slag and neutralizing slag are subjected to hydrogen reducing and vacuum distillation, and high-purity tellurium with the purity being 99.999% or above is obtained. According to the method, the tellurium is recycled from the high-tellurium solution, and the pure sodium arsenite solution is obtained and used as the raw material for purification and removal of cobalt and nickel through the zinc hydrometallurgy zinc sulfate solution arsenic salt. According to the method, the technology process is short, the recycling rate is high, and the problem of pollution in the extraction process in the traditional technology is solved.

The invention provides a chemical detection method for cobalt. The method is characterized in that: a sample containing manganese-nickel-cobalt is heated and dissolved under the action of strong acid, the interfering ion manganese is oxidized into manganese dioxide which undergoes filtering separation, the cobalt-nickel is precipitated by a precipitator and then filtered, and the obtained precipitate is separated from other trace elements; a mixture of Co(OH)2 and Ni(OH)2 is dissolved by acid; under ammonia condition, the cobalt is reacted with excessive and quantitative iodine standard solution to generate [CO(NH3)5I](NO3)2(S), and the excessive iodine undergoes back titration by sodium arsenite standard solution ; and the content of the cobalt is worked out according to the stoichiometric relationship.

The invention provides a harmless treatment method for recycling valuable metal and arsenic resources from arsenic-containing smoke. All valuable elements are recycled and utilized through the procedures of carrying out oxygen pressure leaching via caustic alkali; carrying out selective reduction purification on leachate; during purification, carrying out hydrogen reduction and vacuum distillation on obtained crude tellurium so as to obtain high-purity tellurium; after purification, obtaining a pure sodium arsenite solution, and using the solution for the arsenic salt purification of a zinc sulfate solution so as to remove cobalt and nickel; carrying out fluidization washing on leaching residues; after washing, solidifying arsenic in the solution, and carrying out reduction smelting on the residues; and carrying out oxidization blowing and the like. The arsenic is removed from the smoke, stibium, lead, bismuth, stannum and the like are kept in the residues from which the arsenic is removed as much as possible, and the deep separation of the arsenic and the stibium is realized. The obtained pure sodium arsenite solution is used for the arsenic salt purification of the zinc sulfate solution used for wet-process zinc smelting so as to remove the cobalt and nickel raw materials, part of sodium arsenate with high impurity content is solidified, the arsenic is precipitated, the harmless recycling of the arsenic resource is realized, and the valuable elements, such as the tellurium, the stibium, the lead and the bismuth are recycled. The comprehensive utilizing rate of the resources is high, the application range of the raw materials is wide, and a pollution problem in the extracting process of a traditional technology is solved.

The invention discloses a preparation method and application of an anti-tumor nano arsenic sphere based on invertebrate recombinant ferritin, which is characterized by the following steps: (1) successively through gene amplification, construction of prokaryotic expression vector and prokaryotic expression and Protein purification to obtain recombinant ferritin based on invertebrates; (2) Place recombinant ferritin based on invertebrates in a dialysis bag, dialyze in 5 mM sodium arsenite solution, and use a magnetic stirrer to simulate the entire enrichment process After dialysis for 12 hours, put the dialysis bag in the protein buffer for 12 hours of dialysis, during which the protein buffer was replaced every 4 hours, and the protein solution in the dialysis bag was taken out and concentrated to obtain recombinant iron based on invertebrates. The protein anti-tumor nano arsenic ball has the advantage of significantly inhibiting the proliferation of chronic myeloid leukocyte K562 cells.

A stable method for preparing arsenic trioxide standard gas, comprising the following steps: generation of arsenic hydride: sodium arsenite reacts with hydrochloric acid and potassium borohydride to generate arsine gas and hydrogen gas, which are then separated by a gas-liquid separator; arsenic Atomization: The separated arsine gas and hydrogen gas enter the atomization reactor through the carrier gas, preheat at a certain temperature, and atomize the arsine gas into arsenic atoms through the flame at the furnace mouth of the atomizer ;Arsenic atomic oxidation: atomic arsenic is mixed with nitrogen and oxygen gas in the gas mixing chamber and brought into a high-temperature electric heating furnace, and fully combined with oxygen at a certain temperature to form arsenic trioxide; tail gas absorption. The present invention solves the problem of low generation efficiency of arsine by adjusting the ratio parameter of solution supply; an atomization unit is arranged after the arsenic hydride generation unit, so that arsine is pyrolyzed into atomic arsenic, and atomic arsenic is then combined with oxygen Combined with the generation of arsenic trioxide gas, the oxidation efficiency of arsenic hydrogen is greatly improved.