Sodium ferric fluoride

In place of sodium silicofluoride, sodium ferric fluoride (Na3FeF6) can also be used for fluorination ... 

Sodium ferric fluoride is obtained as a byproduct in the solution processing of Na2BeF6 leach liquor. It is used for substituting for sodium silicofluoride (to an extent of up to 60%) in the ore fusion reaction. 

This hydroxide precipitate can be filtered and passed to later purification stages. The filtrate contains a fairly dilute solution of sodium fluoride which, if completely recovered, could in theory make the process completely self-sustaining in fluorine compounds. A method proposed by Kawecki precipitates sodium ferric fluoride, by the addition of ferric sulphate to the solution, after bringing to a pH of 4 by the addition of sulphuric acid, i.e. 

The sodium ferric fluoride can then be used directly to replace sodium silicofluoride in the main breakdown reaction ... 

In practice higher fluorine and beryllium efficiencies are obtained if a small amount of sodium carbonate is added to the sodium ferric fluoride reaction, as with the silicofluoride reaction, although in the former case it is not strictly required according to the generally accepted equation. It has been... 

The beryl is ground, wet or dry, to about 200 mesh in a ball mill, and then mixed with the sodium ferric fluoride and sodium carbonate in a wet condition. Briquettes are fabricated from the paste, dried and sintered, e.g. by passing continuously through a gas-heated tunnel kiln with a residence time of several hours at 750 C. A rotary kiln would probably not be very satisfactory since the briquettes are somewhat plastic and would tend to adhere to the lining. ... 

Sodium fluoride and ferric fluoride yield a eutectic mixture, melting at 892° C. and corresponding m composition to the formula 65 NaF. 35FeFs.8... 

Ammonium dichromate Ammonium molybdate Ammonium nitrate Ammonium sulfate Barium carbonate Barium chloride Barium nitrate Borax Boric acid Caldum oxide Chromium trioxide Citric acid Potassium thiocyanate Sodium acetate Sodium aluminum fluoride Sodium bicarbonate Sodium chlorate Sodium chloride Sodium nitrate Sodium sulfate Triphenyl phosphate Ammonium chloride Ammonium fluoride Copper sulfate Magnesium chloride Oxalic acid Aluminum chloride Calcium chloride Ferric chloride Potassium permanganate Sodium carbonate Sodium fluoride... 

Halogenation and dehalogenation are catalyzed by substances that exist in more than one valence state and are able to donate and accept halogens freely. Silver and copper hahdes are used for gas-phase reactions, and ferric chloride commonly for hquid phase. Hydrochlorination (the absoration of HCl) is promoted by BiCb or SbCl3 and hydrofluorination by sodium fluoride or chromia catalysts that form fluorides under reaction conditions. Mercuric chloride promotes addition of HCl to acetylene to make vinyl chloride. Oxychlori-nation in the Stauffer process for vinyl chloride from ethylene is catalyzed by CuCL with some KCl to retard its vaporization. 

Copaux-Kawecki An improved version of the Copaux process for extracting beryllium from beryl, which permits recovery of the fluorine. Addition of ferric sulfate to the dilute sodium fluoride solution remaining after the separation of the beryllium hydroxide precipitates sodium tetrafluoroferrate, which is then used in place of sodium fluorosilicate. 

Natural barium sulfate or barite is widely distributed in nature. It also contains silica, ferric oxide and fluoride impurities. Silica is the prime impurity which may be removed as sodium fluorosilicate by treatment with hydrofluoric acid followed by caustic soda. 

Synonym Neatsfoot Oil Necatorina Nechexane Neutral Ahhonium Pluoride Neutral Anhydrous Calcium Hypochlorite Neutral Lead Acetate Neutral Nicotine Sulfate Neutral Potassium Chromate Neutral Sodium Chromatetanhydrous Neutral Verdigris Nickel Acetate Nickel Acetate Tetrahyorate Nickel Ammonium Sulfate Nickel Ammonium Sulfate Hexahydrate Nickel Bromide Nickel Bromide Trihydrate Nickel Carbonyl Nickel Chloride Nickel Chloride Nickel Cyanide Nickel Iiu Fluoborate Nickel Fluoroborate Solution Nickel Fluoroborate Nickel Formate Nickel Formate Dihyorate Nickel Nitrate Nickel Nitrate Hexahydrate Nickel Sulfate Nickel Tetracarbokyl Nickelous Acetate Nickelous Sulfate Nicotine Nicotine Sulfate Nifos Nitralin Nitram O-Nitraniline P-Nitraniline Nitric Acid Nitric Acid, Aluminum Salt Nitric Acid, Iron (111) Salt Compound Name Oil Neatsfoot Carbon Tetrachloride Neohexane Ammonium Fluoride Calcium Hypochlorite Lead Acetate Nicotine Sulfate Potassium Chromate Sodium Chromate Copper Acetate Nickel Acetate Nickel Acetate Nickel Ammonium Sulfate Nickel Ammonium Sulfate Nickel Bromide Nickel Bromide Nickel Carbonyl Nickel Chloride Nickel Chloride Nickel Cyanide Nickel Fluoroborate Nickel Fluoroborate Nickel Fluoroborate Nickel Formate Nickel Formate Nickel Nitrate Nickel Nitrate Nickel Sulfate Nickel Carbonyl Nickel Acetate Nickel Sulfate Nicotine Nicotine Sulfate Tetraethyl Pyrophosphate Nitralin Ammonium Nitrate 2-Nitroaniline 4-Nitroaniline Nitric Acid Aluminum Nitrate Ferric Nitrate... 

Hydrofluoric acid like water is an associated liquid, and even the gas, as we shall soon see, is associated. It has the power of uniting with fluorides. It also seems to be an ionizing solvent for a soln. of potassium fluoride in liquid hydrogen fluoride is an excellent conductor it also possesses marked solvent powers. According to E. C. Franklin,7 the liquid readily dissolves potassium fluoride, ehloride, and sulphate sodium fluoride, bromide, nitrate, chlorate, and bromate acetamide and urea. The solvent action is not so marked with barium fluoride, cupric chloride, and silver cyanide while calcium and lead fluorides copper sulphate and nitrate ferric chloride, mercuric oxide, and magnesium metal, are virtually insoluble in this menstruum. Glass also is not affected by the liquid if moisture be absent. The liquid scarcely acts on most of the metals or non-metals at ordinary temp., though it does act on the alkali metals at ordinary temp., much the same as does water, with the simultaneous production of flame. 

The iron in over-the-counter iron supplements frequently is ferrous sulfate, whereas iron in the ferric state, ferric chloride, was an old (not very effective) poison ivy remedy. Stannous fluoride was an ingredient in toothpaste until it was replaced with sodium fluoride. The terms plumbous and plumbic for lead have historic roots in the word plumber, originally used to refer to someone who works with lead pipes. 

Sodium ferrifluoride, Na3FeF6, is obtained on adding ferric chloride or fluoride to a neutral solution of sodium fluoride.5 It is formed as a white, crystalline precipitate, which is only sparingly soluble in water. It does not give a red colour with thiocyanates, thus indicating that the iron atom is part of the negative radicle.6... 

Zinc ferrite, Zn(Fe02)2 or Zn0.Fe203, occurs in nature as frank-linite (see p. 14) and may be artificially prepared in the laboratory in a variety of ways,5 such as by fusing an intimate mixture of the sulphates of sodium, zinc, and ferric iron at cherry-red heat, and extracting the melt with boiling water. Any basic zinc sulphate is removed with dilute acetic acid. Crystalline zinc ferrite also results when zinc chloride is heated in moist air with ferric chloride or haematite. The zinc chloride may be replaced by the corresponding fluoride.6... 

Test for Cyanide Ion. Place 3 ml of alkaline filtrate in a small beaker or a large test tube, and add 5 drops of freshly prepared 10 per cent ferrous sulfate solution, 2 drops of 6 N sodium hydroxide solution and 5 drops 10 per cent potassium fluoride solution, then boil. Add 1 drop of 10 per cent ferric chloride solution and then add dilute sulfuric acid drop by drop until the solution is acid, in order to dissolve the oxides of iron. Allow to stand for five minutes. A clear solution of a yellow color indicates absence of cyanide ion and hence of nitrogen. The formation of a greenish-blue... 

Sulfur often obscures the test for nitrogen. If sulfur is present, proceed as follows To a portion of the solution add 5 drops of ferrous sulfate solution and 5 drops of fluoride solution, then add sodium hydroxide until the mixture is alkaline. Heat to boiling, and filter from any precipitate. Acidify with dilute hydrochloric acid, and add a drop of ferric chloride to obtain a precipitate of Prussian blue. 

Dithiocarbamates, perhalogenmercaptans, sulfamides, copper salts, and ferric sulfate may be classified in this group. They all seem to be quite reactive against SH groups or are free radical generators. Detergents such as dodine and toxic salts such as sodium fluoride also have a multisite mode of action. 

The same conversion of the iV-oxide to pyrroles has been shown by Mattocks (242) to be brought about by ferrous, but not ferric, salts, although ferric salts were effective in the presence of reducing agents. The reaction rate is increased by fluoride and sodium salicylate, which form... 

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