Apparatus cleaning

Other methods for safely cleaning apparatus containing sodium residues or disposing of waste sodium are based on treatment with bismuth or lead (103), inert organic Hquids (104—106), or by reaction with water vapor carried in an inert gas stream (107). 

Above all, work w lth suitable, compact and clean apparatus on a clean be ich. The best results are usually obtained when the preparation is carried out with something of the care and accuracy of a quantitative analysis. 

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. 

Requires careful and time-consuming procedures with scrupulously clean apparatus and very accurate weighings. Coprecipitation cannot always be avoided. 

Where possible, incorporate cleaning apparatus into the equipment. This can be accomplished either with spray nozzles, spray wands, or spray ball diffusers. Drains should be carefully placed in the equipment so that rinse waters and solvents are allowed to fully drain. 

Blisters developed at the sites of contact after 6-8 h in workers who had spilled liquid acrylonitrile on their legs. The skin of two workers who were cleaning apparatus (temperature 50°C) came into contact witli 5% acrylonitrile solution other possible substances in the mixture were not specified. Serious skin bums developed (Babanov, 1957). 

Fig. 7.46 Vacuum apparatus for cleaning hard-to-clean apparatus.

An ultrasonic cleaning apparatus where the cleaning fluid and the dirty object minutely vibrate in two different directions [80], and an ultrasonic cleaning method in which ultrasonic energy of different frequencies is simultaneously applied [81] are two typical examples that have gained two representative patents in this field. Specially designed US cleaners for the simultaneous treatment of 96-384 microplates have been marketed by Biotek. 

Cleanliness is extremely important in all laboratory work. Begin your work with clean apparatus and a clean bench, and end your work in the same manner the desk top and reagent bottles should be cleaned and arranged before leaving the laboratory. 

At the end of the period he will sign the notebooks and supervise the return of clean apparatus to the cupboards. 

Cyclone A cone-shaped air-cleaning apparatus that operates by centrifugal separation that is used in particle-collecting and hue-grinding operations. 

After the cleaned apparatus has drained, it is dried for 1 hour in the drying cabinet at 100 C. Vessels with covers and bottles with glass stoppers are left open. Care must be taken to ensure that parts which belong... 

Pneumatic System Components. The major components are a compressor, an air storage tank (receiver), an air-cleaning apparatus composed of a main line filter, an air dryer, and a mist separator, all connected by a series of hoses. These sections are followed by an air-conditioning section composed of a filter, regulator, and lubricator, then a controlling section made up of a directional control valve and a speed controller, and, finally, the actuator or operating system for which the pneumatic system was designed to power. 

A Figure 18.20 This diy-cleaning apparatus employs supercritical CO2 as solvent. 

Figure 1.55 Process Diagram for Two-Stage Cold Cleaning Apparatus...

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