Lead fluoroborate solution

Chemical Designations - Synonyms Lead fluoroborate Lead fluoroborate solution Chemical Formula Pb(BF4)j-H,0. 

Borate(l-), tetrafluoro-, lead (2- ) Borate(l-), tetrafluoro-, lead (2+) (2 1) EINECS 237-486-0 HSDB 1991 Lead bis(tetrafluoroborate) Lead borofluoride Lead boron fluoride Lead fluoborate Lead fluoroborate Lead fluoroborate (Pb(BF4)2) Lead fluoroborate solution Lead tetrafluoroborate Lead tetrafluoroborate (Pb(BF4)2) Lead(ll) tetrafluoroborate. Salt for electroplating lead. Atomergic Chemetals ElfAtochem N. Am. Hoechst Celanese M T Harshaw. 

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... 

LEAD FLUOROBORATE Lead fluoborate, Lead Fluoborate solution NL 1 0 0 ... 

Notes. (1) The use of sodium fluoroborate solution supersedes the less convenient fluoroboric acid and permits the preparation to be carried out in ordinary glass vessels. If it is desired to employ fluoroboric acid HBF4, it can be prepared by adding 100 g of AR boric acid in small proportions to 325 g of AR hydrofluoric acid (40% HF) cooled in ice the hydrofluoric acid is contained in a polypropylene beaker, in a beaker coated with wax or in a lead vessel. One-third of the above solution should be employed in the preparation. Handle with great care. 

Metal fluoroborates are produced either from fluoroboric acid and metal salts or by reactions of boric acid and hydrofluoric acid with metal salts. Fluoroborates of alkali metals and ammonium ions tend to crystallize as hydrates and are water soluble except for those of potassium, rubidium, and cesium. The major use for these compounds is as a high-temperature flux. Transition metal and other heavy metal fluoroborates are not as well known and well characterized. They are usually prepared from fluoroboric acid and an appropriate salt and are sold as 40-50% water solutions. Some fluoroborates from metals such as tin, lead, copper, and nickel are prepared by electrolysis of fluoroboric acid. The transition and other heavy metal fluoroborate solutions are used primarily as plating solutions and catalysts. 

Engitech process. This technology uses a leaching solution of fluoroboric add and lead fluoroborate. The desulfurized battery paste (Section 15.2.) is added to a reactor with the leaching solution. The solution is heated and stirred, and metal is recovered via an electrolytic cell. 

LEAD FLUOROBORATE (13814-96-5) Pb (BF4)2 Decomposes in water or acids, forming ionic lead and fluoboric acid solution. Aqueous solution incompatible with sulfuric acid, alkalis, ammonia, aliphatic amines, alkanolamines, alkylene oxides, amides, epichlorohydrin, organic anhydrides, isocyanates, nitromethane, vinyl acetate. Corrodes aluminum and most other metals. Thermal decomposition releases lead fumes and hydrogen fluoride gas. On small fires. 

Electrochemical oxidation of 1,3-ditellurole leads to its stable radical cation 59 ( max = 560 nm), which is also formed when nitrosonium tetra-fluoroborate in CH2C12 is employed as an oxidant (85JA6298). Treatment with hydrazine hydrate smoothly restores the initial ditellurole. Similar to the radical cation of naphthof 1,8-cd][ 1,2]ditellurole (81CB2622), 59 does not display an ESR signal and dimerizes to dication 60 (Amax = 610 nm) on lowering the temperature of the solution to -60°C. The formation of 60 is facilitated by an increase in the concentration of the 1,3-ditellurole. 

The reaction of aqueous tetrafluoroboric acid with a methanolic suspension of (acetato)hydridotris(triphenylphosphine)ruthenium(II) leads to the precipitation of hydridotris(triphenylphosphine)ruthenium(II) cation as the fluoroborate salt.1 The cation has also been produced by the decomposition of the [RuH(P(C6H5)3)4]+ cation in dichloromethane solution.2 On the basis of proton magnetic spectra, a structure with one of the phenyl rings of one triphenylphosphine bound as an arene to the metal was proposed.2 This structure has been confirmed by both x-ray diffraction and 31P nmr spectra.1... 

Reduction of V, R = Me, in dimethylformamide at mercury leads to conversion of the ketone function to secondary alcohol with essentially no cyclization process observed. However, in the presence of a mediator the course of reaction changes. Addition of N,N-dimethylpyrrolidinium fluoroborate causes formation of the cyclized tertiary alcohol. The pyrrolidinium salt is reduced at —2.7V (vs. SCE) at mercury to yield a complex DMP(Hg5) which is thought to act as a single-electron-transfer mediator [42]. Cyclization also occurs in dimethylformamide at a mercury cathode using a homogeneous redox catalyst such as phenanthrene or 2-methoxybiphenol with a redox potential in the range —2.4 to —2.7 (vs. SCE) [43]. Because during these reactions one electron is delivered to the carbonyl compound in solution by the reduced mediator, cyclization of the reduced carbonyl compound can occur before a second electron donor is encountered. 

Fluoroboric acid, HBF4. Mol. wt. 87.83. Prepared by the slow addition of boric acid to hydrofluoric acid with constant stirring in a copper, lead, silver-plated, or waxed container. " Supplier (48% aqueous solution) MCB. 

Aryldiazonium tetrahaloborates, ArN=NBX4, In the Schiemann reaction, an arylamine is diazotized in aqueous hydrochloric acid solution, and the solution or suspension of aryldiazonium chloride is treated with a solution of fluoroboric acid prepared by dissolving boric acid with cooling to 20-25° in commercial 50-60% hydrofluoric acid contained in a reaction flask coated with wax or lined with copper, lead, or silver. The aryldiazonium tetrafluoroborate is collected, dried, and decomposed by pyrolysis. Examples are ... 

The recycling of batteries. A commercial process [30] for the recovery of lead is based on the dissolution of the spent batteries in a fluoroboric acid electrolyte. The lead is deposited on the cathode in tank cells with insoluble lead dioxide coated graphite anodes. Of the metal ion impurities present in the electrolyte formed by battery solution only triva-lent Sb is found to co-deposit significantly with the Pb. By oxidising Sb(III) to Sb(IV), the amount of co-deposition becomes acceptably small for the process. 

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