3 results about "Potassium periodate" patented technology

The application discloses a method for removing odorants in water by using an ozone / potassium periodate homogeneous phase, which comprises adding ozone (O3) and potassium periodate (IO4 ‑ ) into water containing odorants; adjusting the pH value of the water to 6.0-8.0; and reacting for 3-10 minutes at 0-35 DEG C; wherein the molar ratio of O3 to IO4 ‑ is 1:2-10:1, the ozone dosage is 2.0-8.0 mg / L, and the potassium periodate dosage is 3.0-15.0 mg / L. The method can generate high-activity free radicals (·OH, IO3·, etc.) by using a homogeneous phase catalytic system, and thus realizes efficient degradation of the odorants.

This invention belongs to the technical field of organic synthesis and discloses a method for preparing benzo[i]iodo[i]oxapentane reagent. The method involves adding periodic acid or periodate as an oxidant, along with an o-iodobenzyl alcohol compound, to an aqueous acetic acid solution. Heating causes a redox reaction, followed by recrystallization or slurrying to obtain the product, benzo[i]iodo[i]oxapentane reagent. R1 is selected from methyl or trifluoromethyl; R2 is selected from hydrogen, halogen, or methyl; R3 is selected from hydrogen or methyl; and periodate is selected from sodium periodate, potassium periodate, tetrabutylammonium potassium periodate, or lithium periodate. This invention provides a one-step, efficient method for preparing benzo[i]iodo[i]oxapentane reagent using periodic acid / salt, with simple steps and easily separable reaction products. The redox reaction equation is as follows:

The application discloses a method for degrading pollutants by using a chromium-potassium periodate system, and comprises the following steps: adding chromium sulfate into ultrapure water while stirring, and adjusting the pH of the solution to 8-11; under the stirring state, adding potassium periodate into the solution to form a chromium-potassium periodate system solution; and adding the chromium-potassium periodate system solution into a solution of pollutants to be degraded to perform reaction and degrade the pollutants. The method can realize efficient oxidation and degradation of organic pollutants in water under the conditions of low catalyst consumption and proper pH. The application breaks through the pH condition of chromium, and makes the application of chromium not limited to the low pH field, avoids the generation of toxic by-product Cr(VI), and realizes the cleanness and environmental protection of the process.