Mechanical shaking machine

The mechanical shaking machine is employed for auto matic mixing of heterogeneous systems and finds many applications in the organic chemistry laboratory. 

By treatment with anhydrous aluminium chloride (Holmes and Beeman, 1934). Ordinary commercial, water-white benzene contains about 0 05 per cent, of thiophene. It is first dried with anhydrous calcium chloride. One litre of the dry crude benzene is shaken vigorously (preferably in a mechanical shaking machine) with 12 g. of anhydrous aluminium chloride for half an hour the temperature should preferably be 25-35°. The benzene is then decanted from the red liquid formed, washed with 10 per cent, sodium hydroxide solution (to remove soluble sulphur compounds), then with water, and finally dried over anhydrous calcium chloride. It is then distilled and the fraction, b.p. 79-5-80-5°, is collected. The latter is again vigorously shaken with 24 g. of anhydrous aluminium chloride for 30 minutes, decanted from the red liquid, washed with 10 per cent, sodium hydroxide solution, water, dried, and distilled. The resulting benzene is free from thiophene. 

Mechanical agitation, 62-70 Mechanical shaking machine, 69 Mechanical stirring, 62-70, 1108 Meerwein-Ponndorf-Verley reduction, 882, 883-886... 

The mechanical shaking machine is employed for automatic mixing of heterogeneous systems and finds many applications in the organic chemistry laboratory. Numerous forms are available, but these are generally e )ensive. A simple, efficient but inexpensive shaking machine, which can easily be constructed by a competent... 

Apparatus 100-ml round-bottomed flask with a stopper, and shaking machine (vibrator), or a lOQ-ml round-bottomed flask with a mechanical stirrer. 

A. a-Methoxyphenasine condensation). Two hundred grams (0.42 mole) of powdered lead dioxide (Note 1) is added to a solution of 10 g. (0.07 mole) of pyrogallol monomethyl ether (p. 90) in 3 1. of dry benzene in a 1-gal. narrow-necked acid bottle. The bottle and contents are placed in a shaking machine and shaken for 10-20 minutes (Note 2). The reddish brown solid is filtered through an 11-cm. Buchner funnel, and the filter cake is washed once with 400 ml. of benzene. To this filtrate there is added, immediately and with mechanical stirring, a solution of 6 g. (0.06 mole) of o-phenylenediamine (Note 3) in a mixture of 80 ml. of glacial acetic acid and 200 ml. of benzene. The solu-... 

Because of the small dimensions of the apparatus no special mechanical apparatus is required for discontinuous shaking in micro chemistry. For continuous shaking, any of the usual laboratory shaking machines can be used, vibratory shakers being particularly suitable for micro work.63... 

Two basic types of mechanical harvesters are operating in the vineyards. One type uses a set of fingers to beat the grape directly off the vine onto moving conveyor belts. The other hits the trunk of the vine, shaking the grapes off the vine indirectly. The machines normally pick about one acre per hour. Since North Coast pickers harvest 0.5-2 tons per day, the machine can pick the equivalent of 12 to 15 men in an eight-hour day. 

In the coarse-grading machines the corrugations have a slight upward angle corresponding with the upward thrust given by the mechanism which shakes the deck. At certain... 

Mechanical engineering coolers, washing machines, pressing machines, forging machines, flexible robots, pipelines and industrial facilities with dangerous products, shaking tables... 

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