Topic
Sodium chlorate
About: Sodium chlorate is a research topic. Over the lifetime, 791 publications have been published within this topic receiving 6844 citations.
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Patent•
23 Dec 2015
TL;DR: In this paper, a method for treating oil-containing sewage by catalytic oxidation of chlorine dioxide was proposed, which mainly solved the problem of low removal rate in the prior art.
Abstract: The invention relates to a method for treating oil-containing sewage by catalytic oxidation of chlorine dioxide, and mainly solves the problem of low removal rate in the prior art. The method comprises the following steps: firstly adding sodium chlorate and hydrochloric acid into a chlorine dioxide generator, generating chlorine dioxide in situ, and then feeding the chlorine dioxide into a reactor with the oil-containing sewage in a refined oil depot and a catalyst, and treating for 20-90 minutes, wherein the catalyst is supported on an active carbon carrier taking copper oxide as an active component, the weight percentage of the metal active component is 0.5-8 percent, the adding amount of chlorine dioxide is 0.2-1.0g/L, the adding amount of the catalyst is 0.25-1.0g/L and the pH value adjusted by hydrochloric acid is 1-6. According to the technical scheme, the problem is better solved; the method can be used in treatment of the oil-containing sewage in the refined oil depot.
1 citations
Patent•
06 Feb 2013
TL;DR: In this article, a method for digesting a waste rhodium catalyst from an olefin hydroformylation reaction was proposed, which is characterized by comprising the following steps of: removing high-boiling-point organic matter from a waste Rhodium catalysts discharged from an OE reaction device, and having the r Rhodium mass content of 0.01-0.1% through reduced pressure evaporation to obtain a rhodIUM-contained residue with the RMS content of 4-10; after adding concentrated sulfuric acid into the concentrated rhod
Abstract: The invention relates to a method for digesting a waste rhodium catalyst from an olefin hydroformylation reaction, which is characterized by comprising the following steps of: removing high-boiling-point organic matter from a waste rhodium catalyst discharged from an olefin hydroformylation reaction device and having the rhodium mass content of 0.01-0.1% through reduced pressure evaporation to obtain a rhodium-contained residue with the rhodium mass content of 4-10%; after adding concentrated sulfuric acid into the concentrated rhodium-contained residue for full carbonization, adding an alkali metal chlorate solid into the system, and controlling the temperature in the range of 160-220 DEG C during the adding process until the system solution is clear and transparent. At the moment, the organic matter is digested and removed in the form of carbon dioxide, and rhodium exists in the acid solution in the form of soluble salt. During the last step, the mass ratio of the alkali metal chlorate solid to the rhodium-contained residue is 5:1-30:1, and the alkali metal chlorates comprise sodium chlorate, potassium chlorate or a mixture of sodium chlorate and potassium chlorate.
1 citations
1 citations
Patent•
10 Aug 2018
TL;DR: In this article, a lead-thallium separation method for thallium-containing lead sulfide concentrate was proposed, which comprises the steps of wet fine grinding at first till the grinding degree that the mass ratio of particle size smaller than 0.074 mm is 80-100; sulfuric acid is added to the fine-ground ore pulp so that the pH value of the ore pulp can be smaller than 1.5; one or two or all of sodium hypochlorite, sodium chlorate and hydrogen peroxide are added, the ore pulps concentration is
Abstract: The invention discloses a lead-thallium separation method for thallium-containing lead sulfide concentrate. The method comprises the steps that the thallium-containing lead sulfide concentrate is subjected to wet fine grinding at first till the grinding degree that the mass ratio of particle size smaller than 0.074 mm is 80-100%; sulfuric acid is added to the fine-ground ore pulp so that the pH value of the ore pulp can be smaller than 1.5; one or two or all of sodium hypochlorite, sodium chlorate and hydrogen peroxide are added, the ore pulp concentration is 20-35%, a reaction is conducted under microwave irradiation, the ore pulp temperature is 75-90 DEG C, and the reaction time is 15-60 min; after the reaction is completed, one or two or all of sodium carbonate, sodium hydroxide and lime are added to adjust the pH value of the ore pulp to be larger than 10; and flotation is carried out with one or two or all of xanthate, ammonium dibutyl dithiophosphate and diethyldithiocarbamate asa collecting agent and with terpenic oil as a foaming agent, and the product obtained through flotation is lead concentrate with lead and thallium being separated. The method can control thallium pollutant from the source, and a new path is provided for prevention and control over thallium pollution.
1 citations
Patent•
25 May 2012
TL;DR: In this article, an alloy of the formula Fe3-x Al1+x M y T z Ta t wherein M represents at least one catalytic specie selected from the group consisting of Ru, Ir, Pd, Pt, Rh, Os, Re and Ag, and Ta represents tantalum.
Abstract: Disclosed is an alloy of the formula: Fe3-x Al1+x M y T z Ta t wherein M represents at least one catalytic specie selected from the group consisting of Ru, Ir, Pd, Pt, Rh, Os, Re and Ag; T represents at least one element selected from the group consisting of Mo, Co, Cr, V, Cu, Zn, Nb, W, Zr, Y, Mn, Cd, Si, B, C, O, N, P, F, S, CI, Na and Ti; and Ta represents tantalum Such an alloy can be used as an electrode material for the synthesis of sodium chlorate It can also be used as a coating for protection against corrosion
1 citations