4 results about "Potassium hypochlorite" patented technology

The application provides a method for deeply removing sulfides from fuel gas, comprising the following steps: (1) removing hydrogen sulfide gas by an organic alcohol amine absorbent; (2) contacting and reacting the fuel gas after removal of hydrogen sulfide gas with an oxidizing solvent to remove methyl mercaptan, dimethyl sulfide and residual hydrogen sulfide, the oxidizing solvent comprising 1-10% of an organic alcohol amine, 0.5-20% of an organic solvent, 2-38% of an oxidizing agent, 0.2-1% of an inorganic salt, and the balance of water, the organic solvent being at least one selected from the group consisting of tributyl phosphate, dimethylformamide, N-methyl pyrrolidone and polyethylene glycol dimethyl ether; the oxidizing agent being at least one selected from the group consisting of sodium hypochlorite, sodium chlorate, potassium hypochlorite, potassium chlorate, hydrogen peroxide and potassium permanganate; the inorganic salt being sodium carbonate and / or potassium carbonate; (3) adsorbing the fuel gas after removal of hydrogen sulfide, methyl mercaptan and dimethyl sulfide by an adsorbent to remove carbonyl sulfur and carbon disulfide.

A process for synthesizing the compound 5,7-diiodo-1-oxaspiro[2,5]octa-4,7-dien-6-one. This process for synthesizing the compound 5,7-diiodo-1-oxaspiro[2,5]octa-4,7-dien-6-one includes an oxidation reaction of 4-hydroxy-3,5-diiodobenzyl alcohol with a hypochlorite oxidant, in particular selected from sodium, calcium and potassium hypochlorite. This process enables a significant improvement in yield in a simple and inexpensive way.

The invention belongs to the technical field of regeneration of inactivated denitration catalysts, and provides a treatment method of a poisoned SCR denitration catalyst. The method comprises the following steps: soaking a pretreated catalyst in a solution containing an oxidizing agent, and carrying out secondary cleaning to obtain an arsenic-removed catalyst; the oxidizing agent comprises sodium hypochlorite and / or potassium hypochlorite; dipping the arsenic removal catalyst in a solution containing an ion chelating agent, and carrying out third cleaning to obtain an alkaline earth metal removal catalyst; the ion chelating agent comprises ethylene diamine tetraacetic acid disodium salt and / or 1-hydroxyethylidene-1, 1-diphosphonic acid; the alkaline earth metal removal catalyst is soaked in an acidic cleaning solution for fourth cleaning, and harmless treatment is achieved; the acidic cleaning solution comprises mineral acid, a penetrant, an emulsifier and an ion chelating agent. According to the treatment method, arsenic and alkaline earth metal can be efficiently removed, and the specific surface area of the SCR denitration catalyst is increased.

Methods and compositions for rapid verification of cleaning performance on surfaces in cleaning-in-place (CIP) systems and in cleaning-in-place (COP) systems and in high flow areas. The solution comprises alkali metal hydroxide; one or more oxidizing compounds, wherein the one or more oxidizing compounds comprise sodium hypochlorite, potassium hypochlorite, sodium persulfate, potassium persulfate and monopersulfate; and one or more compounds selected from the group consisting of potassium permanganate, sodium permanganate, potassium dichromate, and sodium dichromate. In some examples, the solution also includes potassium tripolyphosphate, sodium tripolyphosphate, or other tripolyphosphate. The substrate is in contact with the solution, and a chromogenic reaction may occur indicating the presence of an organic substance or non-organic contaminant. The chromogenic reaction may occur within less than 30 minutes and at a temperature of 10 DEG C to 60 DEG C.