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Showing papers on "Sodium chlorate published in 2004"


Journal ArticleDOI
TL;DR: It has been observed that ClO(2)/Cl(2) ratio is markedly affected by chlorate to chloride ratio, and reaction mechanism compatible with the reaction kinetics is proposed.

48 citations


Journal ArticleDOI
TL;DR: Chiral crystals of sodium chlorate and sodium bromate induced highly enantioselective organic synthesis in combination with asymmetric autocatalysis as mentioned in this paper, and (S)-5-Pyrimidyl alkanols with up to 98% ee were obtained in the addition of diisopropylzinc to pyrimidine-5-carbaldehydes in the presence of d-sodium chlorate.
Abstract: Chiral crystals of sodium chlorate and sodium bromate induced highly enantioselective organic synthesis in combination with asymmetric autocatalysis. (S)-5-Pyrimidyl alkanols with up to 98% ee were obtained in the enantioselective addition of diisopropylzinc to pyrimidine-5-carbaldehydes in the presence of d-sodium chlorate. On the other hand, (R)-5-pyrimidyl alkanols with up to 98% ee were obtained for the corresponding reaction in the presence of l-sodium chlorate. Chiral crystals of d- and l-sodium bromate were also found to work as chiral initiators.

44 citations


Patent
29 Oct 2004
TL;DR: In this article, a process for leaching a value metal from a titanium-bearing ore material comprising the step of leaching the ore material at atmospheric pressure with a lixiviant comprising a chloride and hydrochloric acid is disclosed.
Abstract: A process for leaching a value metal from a titanium-bearing ore material comprising the step of leaching the ore material at atmospheric pressure with a lixiviant comprising a chloride and hydrochloric acid is disclosed. The leaching conditions are such that titanium is leached and remains in solution. The temperature is maintained at less that 85° C., and the concentration of hydrochloric acid is preferably less than 20% (mass ratio). The preferred chloride is magnesium chloride. The lixiviant may contain oxidant e.g. sodium chlorate or chlorine.

35 citations


Journal ArticleDOI
TL;DR: In this paper, the Ramaman spectra of sodium chlorate in N,N-dimethylformamide (DMF) solution were obtained and the results showed that the ion association in the NaClO3-DMF system is significantly greater than in the NClO4-DIMF system and this is due the higher charge density and lower symmetry of the chlorate anion.
Abstract: Raman spectra of sodium chlorate in N,N-dimethylformamide (DMF) solution were obtained. The band at 926 cm−1 that has been previously assigned to the vibrational mode of the associated chlorate with Cs symmetry is, in fact, due to the non-associated chlorate vibration with C3v symmetry. In the ν2 region of the chlorate anion, a new feature at 600 cm−1 was observed and the results show that it also belongs to the non-associated chlorate. Both bands at 926 and 600 cm−1 are assigned to the vibrations involving O37ClO, in full agreement with the results of normal coordinate analysis reported by others workers. Quantitative measurements performed in the range 590–630 cm−1, allowed the determination of the extent of contact ion pair formation. The results show that the ion association in the NaClO3–DMF system is significantly greater than in the NaClO4–DMF system and this is due the higher charge density and lower symmetry of the chlorate anion. Similar conclusions were reached by others who used different experimental techniques. Copyright © 2004 John Wiley & Sons, Ltd.

14 citations


Patent
14 Apr 2004
TL;DR: In this article, a high purity chlorine dioxide generator comprises water supplying system, feeding system, pouring system, reaction system and control system, and the reaction system uses a mixer which mixes the sodium chlorate and hydrogen peroxide, and a reaction pole which uses a compound to react with sulfuric acid.
Abstract: The high purity chlorine dioxide generator comprises water supplying system, feeding system, pouring system, reaction system and control system. The reaction system uses a mixer which mixes the sodium chlorate and hydrogen peroxide, and a reaction pole which uses a compound to react with sulfuric acid; the device operation cost is low, the purity is high, and the material conversion rate reach 90%.

3 citations


Patent
21 Dec 2004
TL;DR: In this paper, the etchant composition for copper or copper alloy comprises 0.1 to 10 wt.% of one or more oxidizing agents selected from sodium perchlorate, sodium chlorate and sodium hypochlorite.
Abstract: PURPOSE: To provide an etchant composition for copper or copper alloy which improves productivity with almost no chlorine gas discharge and enhances quality of products also by increasing etching speed. CONSTITUTION: The etchant composition for copper or copper alloy comprises 0.1 to 10 wt.% of one or more oxidizing agents selected from sodium perchlorate, sodium chlorate and sodium hypochlorite; 5 to 15 wt.% of one or more inorganic chlorides selected from potassium chloride, sodium chloride and ammonium chloride; 5 to 15 wt.% of copper (II) chloride dihydrate; 6 to 10 wt.% of hydrochloric acid; and 50 to 80 wt.% of water, wherein the etchant composition has an acidity of 1.5 to 2.5N, specific gravity of 1.27 to 1.32 and copper concentration of 130 to 170 g/L.

2 citations


Patent
23 Jun 2004
TL;DR: In this paper, a method of generating ClO2 for sewage processing was proposed, and the results showed that the method has the advantages of low production cost, high material utilization and high Cl2 yield.
Abstract: The present invention is the method of generating ClO2 for sewage processing, and sodium chlorate is used as oxidant and hydrochloric acid and cane sugar are used as reductant. Sodium chlorate, cane sugar and water in the ratio of 1 to 0.05-0.1 to 2 are compounded into water solution, and the water solution is then mixed with hydrochloric acid in the equal volume ratio to form the liquid mixture. At 71 deg.c, the liquid mixture is added into ClO2 generator and gaseous mixture of ClO2 and Cl2 is generated in negative and aeration conditions. Compared with available technology, the present invention has the advantages of low production cost, high material utilization and high ClO2 yield.

1 citations