The process defined in claim 1, wherein the iron (III) chloride is added to Step (i) of the process. Some of the key players in the antimony trioxide market include Sherwin-Williams Company, Almatis GmbH, Minmetals and Great Lakes Chemical Corporation among others. In this process, antimony metal or ores is melted in a furnace to give ATO vapors. With reference to the accompanying Figure, there is illustrated a holding tank A which serves to hold a supply of antimony trisulfide concentrate. The aqueous liquid is then contacted with an acid (e.g., hydrochloric acid) to produce the acid salt of EDTA in crystalline form which precipitates from the aqueous liquid. To facilitate extraction of the antimony trichloride from the aqueous liquid into the organic solvent, it is preferred to agitate the two. Antimony trisulfide is a gray solid. This potential problem is mitigated or obviated by using the preferred two-stage design of leach station B discussed hereinabove. , materials which can not be recovered and must be treated (at large capital cost) prior to emission) is avoided.  Antimony trioxide may also be referred to as diantimony trioxide (DAT), antimony oxide, or in manufacturing as antimony white. 16. A1, Designated state(s): 11. The process defined in any one of claims 13-17, wherein the organic solvent contaÏiing extracted antimony trichloride is contacted with an aqueous acid. It is also preferred, during recovery of the EDTA, the following conditions are maintained: Condition Preferred More Preferred pH 0.5-3.0 1.2-1.9, Reaction Time 0.5-3.0 hours 1.5-2.5 hours. This aqueous liquid containing antimony trioxide in suspension is then fed to dewatering/drying station E via line 25. Antimony trioxide is the most widely used polymerization catalyst in both domestic and overseas markets in the manufacture of polyethylene terephthalate(PET)from ethylene glycol(EG)and high purity terephthalic acid(TPA), or dimethyl â¦ 7. General Information. Embodiments of the present invention will be described with reference to the accompanying Figure which is a schematic of an embodiment of the present process. This solution is then fed to hydrolysis station D wherein the antimony trichloride is hydrolyzed to produce antimony trioxide. 38. PubChem Substance ID 24882835.  Antimony is not abundant in the earthâs crust. As described above, it is desirable in the present process to avoid the presence of iron (flT) chloride from leach station B in solvent extraction station C. The principal reason for this is that the preferred extraction solvent comprising tributyl phosphate will not differentiate between antimony trichloride .and iron (HI) chloride. 35. Hydrolysis station D is connected to a dewatering/drying station E via a line 25. elsie d. isaac, Antimony trioxide market is becoming stabilized, Antimony trioxide: the overview of the cis market, Transfer of the antimony trioxide business Stibnite is burned in air with calcium chloride to make calcium sulfate and antimony trichloride, which is reacted with water to make antimony trioxide Manufacturing Process . Preferably, the aqueous solution used for this purpose comprises at least one of DISCLOSURE OF THE INVENTION. This can be accomplished using conventional mechanical mixers (e.g., rotary impeller) and the like. Specifically, unabated release of this sulfur dioxide is known to lead to acid production which has significant detrimental effects on the environment. Smaller leach reactor. Primary Information Services Among other properties should be noted that is a flame retardant, that is, costs that burn when flame is applied. 3. In dewatering/drying station E, the aqueous liquid is washed and dewatered using conventional counter-current washing/dewater techniques, preferably in a sequential manner. Antimony trioxide is an amphoteric oxide and it exhibits redox nature, it can be readily oxidized to antimony pentoxide and related antimony (V) compounds, but it is also easily reduced to antimony, sometimes with production of stibine. It is preferred to subject the scrub solution to a reduction step (not shown) and to a scavenging step (not shown) to facilitate recovery and recycle of the scrub solution. The primary hazard is the threat to the environment. stabilized with antimony trioxide, Process for the preparation of fast reheat (frh) China produces the largest share followed by US/Mexico, Europe, Japan and South Africa and other countries (2%). the production of polyethylene terephthalate, Domestic survey data and tables were prepared by It has been discovered that an aqueous solution containing ammonium chloride is particularly well suited for this purpose. Email : email@example.com, Indirect process. , containing antimony trichloride and iron (II) chloride in solution) is then fed to solvent extraction station C via line 15. The unreacted antimony trisulfide and sulfur particles from the first stage of leach station B are preferably then reacted in a second stage of leach station B. Preferably, the second stage of leach station B comprises reacting electronic equipment. The process defined in any one of claims 1-6, wherein Step (i) is conducted in the presence of an acid. Thus, the reaction mixture produced in the second stage of leach station B comprises antimony trichloride, iron (II) chloride and iron (III) chloride in solution, and sulfur particles and other insoluble impurities in suspension. The process defined in claim 42, comprising the further steps, after Step (ii), of: reacting the ethylenediamine tetraacetic acid with an acid to produce a salt of ethylenedi.amine tetraacetic acid; separating the salt from the antimony trioxide produced in Step (ii); and recycling the salt to the Step (ii) of the process. It is a reducing agent. These so- called "antimony spots" occur mainly in the summer (McCallum, 1989) and are usually associated with antimony trioxide exposure. The result of this is that the present process may be regarded as a substantially closed or near-closed loop, requiring little or no virgin reagents. In the context of the present process, it has been discovered that an organic solvent comprising tributyl phosphate is particularly well suited for this purpose. During the manufacturing process of silver ingots, the Group also recovers and have commercial value, antimony trioxide process best antimony trioxide process. Further, the ability to implement the present process at relatively low temperatures and substantially ambient pressure serves to enable a reduction in relative overall costs associated with operation of the present process on a commercial scale. 14. Of course, those of skill in the art will recognized that the order of addition of iron (III) chloride and antimony trisulfide to the reaction vessel used in Step (i) of the present process is not p.articularly restricted (it is even possible to concurrently added the reactants to the vessel). Home. 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