摘要:
An abrasive particle having an irregular surface, wherein the surface roughness of the particle is less than about 0.95. A method for producing modified abrasive particles, including providing a plurality of abrasive particles, providing a reactive coating on said particles, heating said coated particles; and recovering modified abrasive particles.
摘要:
Disclosed is a process to produce a hypophosphite salt defined as [C+ hypophosphite−] by reacting P4 with a hydroxide salt defined as [C+OH−], or a hydroxide salt precursor and a catalyst, wherein C+ is the cationic moiety of [C+ hypophosphite−] salt.
摘要:
The invention relates to a process for the treatment of natural apatites with a view to the use thereof for storing irradiated fuel elements.This process consists of contacting a natural apatite powder with an acid aqueous solution, e.g. dilute HNO.sub.3 or HCl for between a few seconds and 10 minutes.In this way, the physicochemical properties of the natural apatite are improved by modifying its surface composition in order to make it close to that of hydroxyapatite. This modified apatite can be used as a filling material in irradiated fuel element storage containers.
摘要:
A process for producing hypophosphorous acid (H.sub.3 PO.sub.2) by reacting, in the absence of a catalyst and under an acidic condition, phosphine with an aqueous solution of hydrogen peroxide to produce an acid solution. The acid solution is then contacted with an non-transition metal hydroxide, oxide or carbonate, e.g. sodium hydroxide, to produce a product composition containing a hypophosphite, e.g. sodium hypophosphite (NaH.sub.2 PO.sub.2.H.sub.2 O). The process of this invention finds particular utility in processes of the type wherein phosphorus is reacted with an aqueous non-transition metal hydroxide composition, e.g. an aqueous suspension of a sodium hydroxide and calcium hydroxide, to produce a hypophosphite and byproduct phosphine. The process of this invention converts a substantial portion of the byproduct phosphine to hypophosphite.
摘要翻译:在不存在催化剂的情况下,在酸性条件下使磷化氢与过氧化氢水溶液反应,生成次磷酸(H 3 PO 2)的方法,生成酸溶液。 然后将酸溶液与非过渡金属氢氧化物,氧化物或碳酸盐例如, 氢氧化钠,以产生含有次磷酸盐的产物组合物,例如 次磷酸钠(NaH2PO2·H2O)。 本发明的方法在其中磷与非过渡金属氢氧化物水溶液组合物反应的方法中具有特别的用途。 氢氧化钠和氢氧化钙的水悬浮液,以产生次磷酸盐和副产物膦。 本发明的方法将大部分副产物膦转化为次磷酸盐。
摘要:
An abrasive particle having an irregular surface, wherein the surface roughness of the particle is less than about 0.95. A method for producing abrasive particles having a unique surface morphology including providing a plurality of abrasive particles; providing a plurality of metal particles; mixing the abrasive particles and the metal particles to form a mixture; compressing the mixture to form a compressed mixture; heating the compressed mixture; and recovering modified abrasive particles.
摘要:
Disclosed are a polyolefin-based flame retardant resin composition and a molded product. The present invention relates to a polyolefin-based flame retardant resin composition satisfying flame retardancy (particularly, UL94V V-0, V-1, and V-2 grades, an auto ignition property of 15 seconds or less, and eco-friendly flame retardancy), improved extrusion properties, a melt index, tensile elongation, or appearance quality required in use of extruded tube molds and the like for insulation and wiring in electrical and electronic products, and vehicles using a particular phosphate-based flame retardant, and a molded product manufactured from the composition are disclosed.
摘要:
An abrasive particle having an irregular surface, wherein the surface roughness of the particle is less than about 0.95. A method for producing abrasive particles having a unique surface morphology including providing a plurality of abrasive particles; providing a plurality of metal particles; mixing the abrasive particles and the metal particles to form a mixture; compressing the mixture to form a compressed mixture; heating the compressed mixture; and recovering modified abrasive particles.
摘要:
A process for stabilizing hypophosphite salt is provided, which comprises the following steps: a) washing the hypophosphite salt at least one time under a controlled pH value of 4-11, preferably 5-8, as the said hypophosphite salt in an aqueous solution and/or in a solid state; and b) drying the said hypophosphite salt under reduced pressure to remove the volatiles. The process can prevent or minimize the formation of a dangerous quantity of phosphine from hypophosphite salts, more particularly in the flame retardant of the application. The flame retardant polymer composition is also provided, which comprises a polymer and the hypophosphite salt stabilized by the above process.
摘要:
Methods for preparing hypophosphorous acid are disclosed comprising contacting an insoluble anode with an aqueous solution of hypophosphite anions and applying a current through the insoluble anode to a cathode in electrical contact with the aqueous solution to generate H+ ions in the aqueous solution thereby forming a hypophosphorous acid solution.
摘要:
An abrasive particle having an irregular surface, wherein the surface roughness of the particle is less than about 0.95. A method for producing modified abrasive particles, including providing a plurality of abrasive particles, providing a reactive coating on said particles, heating said coated particles; and recovering modified abrasive particles.