Sand acid

None Sanded Acid - None Sanded Acid... 

Chemical Designations - Synonyms Fluorosilicic acid, Hexafluosilicic acid, Hydrofluosilicic acid. Hydrogen hexafluorosUicate, Sand acid, Silicofluoric acid Chemical Formula HjSiF -HjO. Observable Characteristics - Physical State (asshipped) Liquid Color Transparent, straw colored, colorless Odor Acrid, sharp. 

Rubbing Alcohol Ruby Arsenic Saccharose Saccharum Safflower Seed Oil Sal Acetosella Sal Ammoniac Salicylic Acid Salmiac Salt of Saturn Salt of Sorrel Salufer Sal Volatile Sand Acid Santachlor... 

CHEMICAL PROPERTIES stable under ordinary conditions of use and storage hazardous polymerization has not been reported a powerful oxidant reacts with water to form chlorine and hydrofluoric acid corrosive attacks quartz if traces of moisture are present decomposes in cold and hot water reacts with organic matter, glass, asbestos, sand, acids, alkalies, halogens, salts chlorofluorocarbons, metal oxides, and many other materials FP (NA) LFL/UFL (NA) AT (NA) HC (NA) HF( 164.5 kJ/mol at 25 C) Hf (7.60 kJ/mol at 196.8K) T,(154.5 C, 310 F). 

The pump unit must be designed to operate at very onerous levels of pressure, temperature and in the presence of contaminates such as sand, acids etc. Moreover, the unit must be suitable for lowering into a well-bore which can vary from only 150 to 300 mm in diameter. Due to diametral limitations and the necessary power requirements the motor pump unit itself becomes extensive in length, e.g. up to 10 metres. See Reference 6 for an overview of the subject of submersible pumps. 

Synonyms Dihydrogen hexafluorosilicate (2-) FKS Hexafluorosilicic acid Hexafluosilicic acid Hydrofluorosilicic acid Hydrofluosilicic acid Hydrogen hexafluorosilicate Hydrosilicofluoric acid Sand acid Silicate (2-), hexafluoro-, di hydrogen Empin cal FsSi 2H Formula H2SiF6... 

Sancure 830, Sancure 847 Sancure 850, Sancure 853 Sancure 1073 Sancure 1517. See Polyurethane resin Sand. See Quartz Cristobalite Sand acid. See Fluosilicic acid Sandalwood. See Sandalwood (Santalum album)... 

Banks. The sloping parts between the hearth of an open-hearth steel furnace and the back and front walls. They were constructed of refractory bricks covered with fritted sand (Acid O.H. Furnace) or burned-in magnesite or dolomite (Basic O.H. Furnace), cf. breasts. 

Specimen No. Control Flame treated Sanded Acid treated, oven-dried at 90 C Acid treated, oven- dried at 71 C Acid treated, wiped, air-dried at 22°C Acid treated, acetone- dried Plasma treatment ... 

Dry - 207 Slurry - 207 Sand acid - 835 Sandalwood oil - 234 Sani-Fresh soap solution - 207 Sanitizers - 876 Santosafe - 281,364, 818 Saponified oil - 228 Sassafras oil (see Essential oils)... 

The main component of sandstone reservoirs ( siliciclastic reservoirs ) is quartz (Si02). Chemically it is a fairly stable mineral which is not easily altered by changes in pressure, temperature or acidity of pore fluids. Sandstone reservoirs form after the sand grains have been transported over large distances and have deposited in particular environments of deposition. 

First place about 5 g. of clean dry sand in A, and then 45 ml. (3 S ) rectified spirit cool the flask in ice-water and cautiously add 40 ml. (74 g.) of concentrated sulphuric acid, shaking the mixture thoroughly during the addition to ensure a... 

Ethyl bromide soon distils over, and collects as heavy oily drops under the water in the receiving flask, evaporation of the very volatile distillate being thus prevented. If the mixture in the flask A froths badly, moderate the heating of the sand-bath. When no more oily drops of ethyl bromide come over, pour the contents of the receiving flask into a separating-funnel, and carefully run oflF the heavy lower layer of ethyl bromide. Discard the upper aqueous layer, and return the ethyl bromide to the funnel. Add an equal volume of 10% sodium carbonate solution, cork the funnel securely and shake cautiously. Owing to the presence of hydrobromic and sulphurous acids in the crude ethyl bromide, a brisk evolution of carbon dioxide occurs therefore release the... 

Place 20 g. of benzoic acid and 20 ml. (16 g.) of ethanol in A, connect up the apparatus, and then heat the flask on a sand-bath so that the solution in the flask boils gently. At the same time, pass a brisk current of hydrogen chloride into the reaction... 

Oleum is marketed in all strengths up to ca. 70 per cent. SO3. From 0 to 40 per cent, free SO3, it is a liquid from 40 to 60 per cent, free SO3, it is a solid from 60 to 70 per cent, free SO3, it is liquid above 70 per cent, free SO3, it is a solid. The acid must be kept in ground glass stoppered, thick-walled bottles. If it is required to melt the acid, the stopper is removed, a watch glass placed on the mouth of the bottle, and the bottle placed in a layer of sand in an air bath which is warmed with a small flame. The bottle is fitted with a wash bottle attachment, and any desired quantity of acid is forced out by gentle air pressure from a hand or foot bellows (the mouth must not be used) this procedure is far more satisfactory than that of pouring the liquid acid from the bottle. 

Mix intimately in a mortar 100 g. of sodium laevulinate, 250 g. of phosphorus sulphide (1) and 50 g. of clean dry sand. Place the mixture in a flask fitted with a condenser for distillation and a receiver (2). Heat the flask with a free flame until the reaction commences, and then remove the flame. When the reaction subsides, continue the heating until distillation ceases. Wash the distillate with 10 per cent, sodium hydroxide solution to remove acidic by-products and steam distil. Separate the crude 2-methyltliiophene from the steam distillate, dry over anhydrous calcium sulphate, and distil from a little sodium. Collect the pure compound at 113° the yield is 30 g. 

Place an intimate mixture of 125 g. of powdered, anhydrous zinc chloride and 26-5 g. of acetophenonephenylhydrazone in a tall 500 ml. beaker in an oil bath at 170°. Stir the mixture vigorously by hand. After 3-4 minutes the mass becomes hquid and evolution of white fumes commences. Remove the beaker from the bath and stir the mixture for 5 minutes. Then stir in 100 g. of clean, white sand in order to prevent solidification to a hard mass. Digest the mixture for 12-16 hours on a water bath with 400 ml. of water and 12 ml. of concentrated hydrochloric acid in order to dissolve the zinc chloride. Filter off the sand and the crude 2-phenylindole, and boil the solids with 300 ml. of rectified spirit. Treat the hot mixture with a little decolourising carbon and filter through a pre-heated Buchner funnel wash the residue with 40 ml. of hot rectified spirit. Cool the combined filtrates to room temperature, filter off the 2-phenylindole and wash it three times with 10 ml. portions of cold alcohol. Dry in a vacuum desiccator over anhydrous calcium chloride. The yield of pure 2-phenylindole, m.p. 188-189°, is 16 g. 

The formation of an organosodium compound (p-tolyl-sodium) is well illustrated by the interaction of sodium sand or wire with p-chlorotoluene in light petroleum (b.p. 40-60°) at about 25°, for when the reaction mixture is added to excess of solid carbon dioxide pure/ -toluic acid is obtained directly in a yield exceeding 70 per cent. ... 

Method B. Place 125 g. (106 -5 ml.) of diethyl phthalate and 25 g. of molecular sodium (sodium sand see Section 11,50,6) in a 500 ml. round-bottomed flask fitted with a reflux condenser and dropping funnel. Heat the flask on a steam bath and add a mixture of 122 5 g. (136 ml.) of dry ethyl acetate and 2 5 ml. of absolute ethanol over a period of 90 minutes. Continue the heating for 6 hours, cool and add 50 ml. of ether. Filter the sodium salt (VI) on a sintered glass funnel and wash it with the minimum volume of ether. Dissolve the sodium salt (96 g.) in 1400 ml. of hot water in a 3-htre beaker, cool the solution to 70°, stir vigorously and add 100 ml. of sulphuric acid (3 parts of concentrated acid to 1 part of... 

Because cyano groups may be hydrolyzed to carboxylic acids (Section 20 19) the Sand meyer preparation of aryl nitriles is a key step m the conversion of arylammes to sub stituted benzoic acids In the example just cited the o methylbenzomtnle that was formed was subsequently subiected to acid catalyzed hydrolysis and gave o methylbenzoic acid in 80-89% yield... 

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