177 results about "Sodium perchlorate" patented technology

The invention provides a preparation method of a silicon-containing hydroxyapatite coating of a carbon / carbon composite material. The preparation method comprises the following steps: placing a low-density carbon / carbon composite material in a hydrothermal kettle containing a sodium perchlorate solution for hydrothermal treatment, and then washing with distilled water and drying the carbon / carboncomposite material; placing the treated carbon / carbon composite material in a flowable aqueous solution containing calcium nitrate and ammonium dihydrogen phosphate, and precipitating out a calcium hydrophosphate coating on the surface of the carbon / carbon composite material through an ultra-high frequency electromagnetic induced heating method; then placing the calcium hydrophosphate coating of the carbon / carbon composite material in the hydrothermal kettle containing an ammonia water aqueous solution for hydrothermal treatment so as to obtain the hydroxyapatite coating of the carbon / carbon composite material; and subsequently, placing the hydroxyapatite coating of the carbon / carbon composite material in the hydrothermal kettle containing a sodium silicate aqueous solution for hydrothermal treatment again so as to obtain the silicon-containing hydroxyapatite coating of the carbon / carbon composite material. By using the method, the silicon-containing hydroxyapatite coating with good crystallinity, high bonding strength up to critical load 143 N and Vickers hardness 2.3 can be prepared on the surface of the low-density carbon / carbon composite material.

The invention discloses a glassy carbon electrode (GCE) modified by aniline-co-aminophenol copolymer carbon nanotube composite, a preparation method thereof and a method for removing perchlorat from water. The preparation method of the glassy carbon electrode comprises the following steps: dispersing carbon nanotubes in DMF; taking a proper amount of mixed liquor to drip onto the clean surface of the glassy carbon electrode, and air drying; carrying out electrolytic polymerization on a three-electrode system consisting of a glassy carbon working electrode modifying the carbon nanotube, a platinum counter electrode and a calomel reference electrode in the mixed liquor of hydrochloric acid, aniline and o-aminophenol through a constant bit method; thus, generating aniline-co-aminophenol copolymer carbon nanotube composite on the surface of the carbon nanotube modified glassy carbon electrode after a certain time. The modified electrode is washed by diluted hydrochloric acid and secondary water successively, forms the three-electrode system with the platinum counter electrode and the calomel reference electrode, and is doped in the water body containing perchlorat. The perchlorat is doped on the glassy carbon electrode modified by the aniline-co-aminophenol copolymer carbon nanotube composite, which can be seen clearly in an X-ray photoelectron spectroscopy.

The present invention belogns to the field of electrolytic technology, and it relates to a method for preparing sodium perchlorate by utilizing external circulating type electrolytic process. The chrome-removed electrolyte can be fed into electrolytic system to make electrolysis. It is characterized by that the electrolyte is introduced into external circulating type electrolytic system to make electrolysis to obtain sodium perchlorate, and its electrolyte external circulation mode is a natural convection circulation or forced circulation. Said invention can implement continuous operation, can prolong life of electrode, raise production capacity and reduce production cost, etc.

A chemical carbon dioxide gas generator comprising: - a charge housing; - a carbon dioxide gas penetrable charge, contained in the said housing, the charge comprising a) 40-60 wt. % of a substance which upon decomposition generates carbon dioxide, which substance is selected from the group of magnesium carbonate, other carbonates, magnesium oxalate and other oxalates, b) 20-50 wt. % of an oxidiser selected from the group of sodium chlorate, potassium chlorate, lithium chlorate, other metal chlorates, sodium perchlorate, potassium perchlorate, lithium perchlorate, and other metal perchlorates, c) 1-20 wt. % of carbon or another fuel, d) 1-10 wt. % binder, said components a), b), c) and d) together forming 90-100 wt. % of the total weight of the charge; - an ignition device for igniting the charge; - a carbon dioxide gas treatment unit for reducing the content of one or more side-products - which may have been formed by the charge - in the generated carbon dioxide, and / or for cooling carbon dioxide gas generated by the charge; and - an outlet for carbon dioxide gas generated by the charge.

The invention relates to an organic anode used for a sodium carbon dioxide battery and a manufacturing method thereof, and the sodium carbon dioxide battery. The organic anode comprises a catalyst, anorganic electrolyte for activating the catalyst and providing sodions, a conductive additive and a binder. The organic electrolyte comprises one of a sodium perchlorate electrolyte, a sodium trifluoromethanesulfonate electrolyte, a sodium bis(trifluoromethanesulfonyl)imide electrolyte and a sodium hexafluorophosphate electrolyte. The catalyst comprises at least one of graphite, activated carbon,Ketjen black, carbon fibers, carbon nano angles, carbon nanotubes, graphene, a modified carbon material and other porous active materials. The organic electrolyte activation catalyst can effectively accelerate a transmission rate of ions and electrons and conductivity is improved.