Sodium chlorate

About: Sodium chlorate is a research topic. Over the lifetime, 791 publications have been published within this topic receiving 6844 citations.

Characterization of mixed crystals of sodium chlorate and sodium bromate and the doped nickel sulphate crystals

Abstract: The nickel sulphate doped mixed sodium chlorate and sodium bromate mixed crystal is grown by slow evaporation solution growth technique at room temperature. The grown crystal was subjected to XRD, UV, FTIR, SEM, TG/DTA, Microhardness and SHG analysis. Characterization studies reveal that the grown crystal forms cubic system with space group P213. The crystal possesses less absorption in the UV-Visible region. The presence of various functional groups has been identified from FTIR studies with their vibrating frequencies. The second harmonic generation efficiency was also determined. The mechanical property was studied by microhardness.

Thermolysis in the BaO2-NaClO4 system

Abstract: The mutual influence of barium peroxide and sodium perchlorate on thermolysis of the (2 ⎯ x)BaO2-xNaClO4 system (x = 0-2.0) has been studied. It has been demonstrated that the use of the physicochemical mechanism of this influence makes it possible to carry out heterogeneous combustion in complex oxide systems in the controlled regime by changing the mutual concentration of solid inner reaction oxidizers. An explanation of the thermal and kinetic effects in the thermolysis of the peroxide-per� chlorate system has been suggested. Alkali metal chlorates and perchlorates decompose on heating to evolve oxygen. This makes them suitable for using as oxygen sources in oxidation reactions, including the selfpropagating hightemperature syn� thesis (SHS) of complex oxides, which requires the presence of a fuel and oxidizer in the reaction system (1, 2). In the SHS of complex oxide materials, solid inner reaction oxidizers, such as sodium perchlorate NaClO 4 , can be used as an alternative or complement to gaseous oxygen. Sodium perchlorate contains more than 50 wt % of oxygen, which is completely evolved at relatively low temperatures (3). However, in the com� bustion reaction, the time interval of the vigorous oxy� gen evolution from the solid oxidizer may not coincide with the intense exothermic oxidation reaction (com� bustion) of the metal component. If this is the case, the chemical reaction rate significantly decreases, which leads to incomplete reaction of the components and even to combustion failure. The kinetic parame� ters of sodium perchlorate thermolysis can be changed by both external physical actions (for example, electric field (4)) and various chemical additives. As is known, small additions (up to 4 wt %) of some metal oxides catalyze the thermolysis of potassium perchlorate and sodium chlorate (5). Inasmuch as metal oxides are components of reaction mixtures for the SHS of complex oxide materials, if the character of the influence of some oxide on perchlorate is known, it is possible to find the bath composition at which the process will be controllable and will proceed at defi� nite rates and temperatures. In SHS processes, alkali metal and alkaline earth peroxides are often used as oxide components. For example, barium peroxide BaO 2 is used in the synthesis of hightemperature superconducting ceramics (HTSC—YBa2Cu3O 7- x), barium hexaferrite (BaFe12O19), barium stannate (BaSnO 3 ), etc. In these systems, the fuel is a powder of a corresponding metal: iron, copper, and tin. Thus, to determine optimal component ratios when sodium perchlorate is used as a solid inner reaction oxidizer, it is necessary to know the mechanism of the influence of superstoichiometric NaClO4 , as a chemical addi� tive, on the synthesis in these systems. To determine this mechanism, we considered the mutual influence of NaClO4 and BaO2 on thermolysis of these com� pounds in the reaction mixture.

Production method for polyferric chloride sulfate

Abstract: The invention discloses a production method for polyferric chloride sulfate. According to the method, polyferric chloride sulfate is obtained by conducting oxidation and hydrolytic polymerization reaction at the normal temperature with rolling steel acid pickling waste liquid and ferrous sulfate as raw materials and with sodium chlorate as an oxidizing agent. Accodring to the method for preparing the polyferric chloride sulfate through the rolling steel acid pickling waste liquid, the acid pickling waste liquid is utilized, and no emission or pollution is caused in the whole production process. The polyferric chloride sulfate produced with the rolling steel acid pickling waste liquid and the ferrous sulfate as the raw materials is a liquid product by directly conducting oxidation, hydrolysis and polymerization through sodium chlorate, and the solid sodium chlorate can be prepared after drying is conducted. Compared with a traditional production process, the production cost is saved by 30% or above. The use effect of the prepared project is superior to those of polymerization ferric chloride and the polymeric ferric sulfate.

Method for preventing increase of chlorate in salt water

Abstract: PROBLEM TO BE SOLVED: To prevent an increase of a chlorate concn in a salt water for electrolyzing conveniently and at low cost by subjecting the water to dechlorination to make a replenishing water after decomposing the chlorate by adding hydrochloric acid to a dilute salt water from an electrolytic cell SOLUTION: The salt being a starting material is dissolved, purified and supplied to the electrolytic cell and electrolyzed by ion-exchange membrane method to obtain chlorine and caustic soda The hydrochloric acid is added to the dilute salt water discharged from this electrolytic cell and containing sodium chlorate so as to obtain 001-03N Then the chlorate is decomposed by retaining the salt water at 70-95 degC for 2-20min After that, the salt water is passed through a dechlorination tower to dechlorinate and used for dissolving the salt being the starting material as the replenishing water In this way, the increase of the chlorate in the salt water for electrolyzing is prevented and a quality deterioration of a caustic soda product is prevented

A New Method of Preparing Oxygen for use in Respirators, Life Saving Apparatus, Recharging Oxygen Cylinders, and for other purposes.

Abstract: 16,693. Harger, J. July 13. Oxygen.-In the manufacture of self-heating mixtures for preparing oxygen, such as mixtures containing a highly oxygenated salt, e.g. potassium or sodium chlorate or perchlorate, and, as a catalyst, manganese dioxide or ferric oxide or other like peroxide, the constituents are very finely subdivided and thoroughly mixed, and the mixtures are compressed under high pressure into suitable form, with one or more rods, wires, c when, however, combustibles &c. are used, lamp-black or a substance not generally regarded as a combustible, such as potassium ferrocyanide or ammonium bichromate, is employed. The precipitated oxides used as catalysts may be obtained as waste products of certain processes, for example if " Weldon mud " be treated with dilute acid to remove calcium carbonate, suitable precipitated manganese dioxide results. In an example, suitable proportions of chlorate, catalyst, and lamp-black are sieved through a "70 mesh" sieve, and the thoroughly mixed powder, preferably moistened, is compressed and moulded about one or more wires &c., each rod being provided with a match-head or other known igniter at one end to start the combustion. In a modification, the moulded bodies may be made with a core of the mixture described above, with or without an increased proportion of heating- agent, surrounded by a mixture of chlorate and catalyst, or vice versa. The compressed rods may be placed or fed end to end in use to provide a constant supply of oxygen. According to the Provisional Specification, the heat-producing agent may, in some cases, be kept separate from the oxygen-yielding mixture, as by using separate but contiguous vessels. A catalyst mentioned is ferric hydrate. Suitable combustible materials mentioned are powdered charcoal, wood flour, powdered coal, powdered metals, phosphorus, and hydrocarbons. In some mixtures, where carbon dioxide is formed, caustic potash or soda is admixed to combine with the dioxide. Other heat-producing agents are iron sulphide, finely divided iron, or lime, sodium, sodium peroxide, &c. used in conjunction with moistening.