Branson ultrasonic cleaner

Ultrasonicator Bransonic ultrasonic cleaner, 0.75-gal (3.4 1-L) capacity Vortex mixer... 

A Branson ultrasonic cleaner (2.8 liter, 13 x 23 x 10 cm), purchased from Fisher Scientific Company, is used for sonication. Without sonication, the yield drops by ca. 10-15t. 

A commercially available ultrasonic cleaner was used for the prqjaration of nickel powders from nickel salt in aqueous solution. This cleaner, Model 3210 (Branson Ultrasonic Corp., CT), is normally used as a cleaning apparatus, working at a frequency of 47 kHz with e power of 130 W that consists of a stainless-steel bath of 5.17 1 capacity and has an ultrasonic transducer attached to the bottom of the bath. A liquid solution temperature in the bath can be varied from room temperature to maximum of 80 °C. 

For reaction on a 10-mmol scale, an ultrasonic cleaner with sufficient output power (e.g., Branson Model B-220) can be used for external irradiation. 

Unlike cold-cleaners, vapor degreasers lose relatively small amounts of solvent as solid waste or liquid drag-out. Most emissions are due to vapor loss and the loss level is highly dependent on operator and operating conditions. Solvent losses for a poorly operated open-top vapor degreaser may be eight or more times greater than for a well-operated unit (Branson Ultrasonics Corporation, 1988). 

The buffer (-800 ml) is heated to boiling in the microwave oven and poured into an 80-W ultrasonic cleaner (Bransonic 12, Branson Cleaning Equipment Co., Shelton, CT). The slide rack is sonicated for 1 min and then cooled in buffer in the staining container for an additional 10 min. 

A simultaneous ultrasonic treatment of the reaction phase (with ultrasonic cleaner Bransonic 12 was carried out in all experiments using a weak source of ultrasound in order to eliminate formed products from the metal surface and thus stabilize the current in the process. Stronger sources of ultrasound have not been used to avoid turbulent processes and the uncontrolled superheating of the reaction zone. 

The incorporation of treated CNTs into NR was carried out by a solvent mixing method. Firstly, a certain quantity of CNTs and NR was added into the toluene solution, respectively. The solution of CNTs was sonicated using a Brasonicl Ultrasonic cleaner 1210 (Branson Ultrasonics Corporation) for 2 h. Meanwhile, the solution of NR was stirred and kept for certain duration until the rubber was uniformly dissolved in the toluene. The toluene solution of CNTs was subsequently dispersed into the solution of NR with stirrer and ultrasonication simultaneously for 2 h. Then the dry CNT/NR mixture was obtained by evaporating the solvent off at 80 °C under vacuum. Subsequently,... 

To a solution of l-(t-butyldimethylsilyloxy)-3-[(f-butyldimethylsilyloxy)methyl]benzene (0.700 g, 1.99 mmol) in acetonitrile (20 mL) was added 37% w/w KF-basic AI2O3 (2.1 g). The reaction vessel was placed in a Bransonic 2200 ultrasonic cleaner (47 kHz) and sonicated for 15 min. The reaction was judged complete at this time via TLC. The mixture was filtered and the alumina was washed thoroughly with methanol. The combined fractions were concentrated in vacuo. 

To a solution of methyl ( )-5-(2-iodophenyl)pent-2-enoate (159 mg, 0.5 mmol) in benzene (0.2 mL) and acetonitrile (0.2 mL) under a nitrogen atmosphere was added tetrakis(triphenylphosphine)palladium (58 mg, 0.05 mmol) and triethylamine (77 L, 0.55 mmol). The mixture was irradiated in the water bath of a Branson B-220H ultrasonic laboratory cleaner for 6 h. 

A heterogeneous mixture of 2-decanol (0.475 g, 3 mmol), solid KMn04 (2.37 g, 15 mmol), and benzene (15 mL) was submitted to ultrasonic irradiation in a 200-mL round-bottom flask stoppered with a rubber septum. A laboratory cleaner (Branson, 100 W, 45 kHz) thermostated to 50° C was used. After 40 h, solid materials were filtered off through a Celite pad and washed with benzene. The filtrate was concentrated on a rotary evaporator. The crude residue was purified by vacuum distillation to afford 2-decanone (0.417 g, 89%). The product, 99% purity, was identified by comparison with an authentic sample by GC. 

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