Ammonia, drying

Acetylene and Potassium in Liquid Ammonia Potassium (40 g) is dissolved in 1 liter of dry liquid ammonia. Dry acetylene is then bubbled into the solution until the blue color is discharged. A solution of 15 g of estrone in 300 ml of dioxane is prepared and diluted with 300 ml of ether, cooled, and added to the potassium acetylide solution over a period of 10 min. The liquid ammonia is allowed to evaporate, an additional 500 ml of ether is added, and the mixture is allowed to stand overnight. About 3 liters of 5 % sulfuric acid is added and the organic layer separated. The water layer is re-extracted with fresh ether, and the combined ether extracts are washed twice with 5 % sodium carbonate solution, th6n several times with water, and finally evaporated under reduced pressure. The residue is dissolved in 150 ml of methanol, then an equal quantity of hot water is added and the mixture cooled. The precipitated solid is collected, washed with cold 60 % methanol and crystallized once from methanol-water to give 14.8 g (85%) of 17a-ethynylestradiol mp 143-144°. 

Frothing can be effectively suppressed by cooling the suspension of alkali amide to a temperature just below the b.p. (-33 C) of ammonia (dry ice/acetone bath). 

To estimate as pyrophosphate of magnesia, a weighed portion is taken, and treated with nitrie acid until entirely dissolved. The solution is mixed with a considerable exoess of ammonia chloride of ammonium is then added and lastly, sulphate of magnesia, as long as a procipitete continues to be formed. The mixture is allowed to stand twelve hours the deposit of phosphate of magnesia and ammonia is then collected by filtration, and well washed with dilute solution of ammonia, dried, and heated to intense redness, to expel all traces of ammonia. Every one hundred parts of pyrophosphate are equal to 28 16 of phosphorus. 

The tube is set in a circular oven and a steady current of dry ammonia (dried with lime) from a generator or cylinder is led in over toe chloride. The oveu temperature is raised slowly to 450-500° C and held there until no more fumes of ammonium chloride escape. After cooling, the product is powdered in a mortar and re-ignited in ammonia as described. Yield nearly theoretical. To remove traces of unreacted chromium (III) chloride, the black product is treated with 50ml of 3N hydrochloric acid and one-half gram of granulated tin in the cold for about 15 minutes. The excess tin is removed, the product washed well with water, suction-filtered, and dried at 105 12O. The nitride is hydrolyzed slowly by hot aqueous alkali. 

Silicone Alcohols, aldehydes, ammonia, dry heat, chlorinated diphenyls, and hydrogen peroxide Petroleum oils or fuels, aldehydes, concentrated mineral acids, ketones, esters, and silicone fluids Typical color brick red Temperature range -60 to 260°C. Easily compressed. Density 1.15-1.32 0.90... 

Salicylic acid pH 3-7 adjusted with ammonia Dry at 100-105°C La(C7H503)3-5H20 [87]... 

PZC/IEP of Amorphous AI(OH)3 Obtained from Chloride and Ammonia, Dried at 200°C... 

Precipitated from ZrOCl2 Solution with Ammonia Dried in air at 110°C. 

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