Hot oil bath

Yttrium nitrate dissolved in emulsion and evaporated in hot oil baths... 

The checkers used a 275-watt General Electric sunlamp. The submitters indicate that the type of sunlamp is not critical and that a 125-watt Philips E99/2 sunlamp or a 125-watt Philips 57203 high-pressure mercury lamp are suitable. If the heat from the sunlamp does not maintain reflux, the reaction flask should be about one-fourth submerged into a hot oil bath. 

Other reactors and processes include the hot oil bath, molten salt bath, microwave, and plasma. These processes have been researched on laboratory and some cases pilot plant scale. None have proven commercially successful. 

The operation of monitoring instrumentation (e.g., transmitters, switches) should be checked by either injecting a suitable signal at the field instrument terminals or by installing the instrument in a comparator (e.g., a hot oil bath, dead weight tester). The result received by the control system on the control room display or local controller I/O register, as applicable, should be recorded. Any problems should be reported to the company/companies responsible. 

To a hot (oil bath temperature 90 C), stirred solution of Ph3P (26.2 g, 0.1 mol) in anhyd benzene (110 mL) was added dropwise l-chloro-3-fluoropropan-2-one (5 ll.Og, 0.1 mol). After a while, the phosphonium chloride precipitated. At the end of the addition, stirring was continued at 90 C for 3 h. (1-Fluoro-acetonyl)triphenylphosphonium chloride (6) was filtered off from the cold mixture, washed with benzene, and dried under vacuum yield 28.7g (77%) mp 187 C (dec.). 

Seal the tube under a nitrogen atmosphere and then place it in an oil-bath that is maintained at a temperature of 123°C. Upon immersion in the hot oil-bath, the polymerization mixture will become homogeneous and will develop a yellowish-red colour. 

The polymerization mixture will eventually solidify and at this point (typically >24 h) the Schlenk flask should be removed from the hot oil-bath and allowed to cool to room temperature. 

The free-radical polymerizations of the monomers were carried out in test tubes. In the glovebox, each methacrylate monomer (10 wt%) and the initiator ACHN (1 part intitiatorilO parts monomer) was dissolved in toluene and loaded into a test tube. Then the tubes were moved out of the glovebox and were gradually heated under nitrogen purge to 120 C to initiate the reaction in a hot oil bath. The polymerization system remained above 80 °C for 8 hrs. Each polymer was then precipitated in a large volume of methanol, filtered and purified by reprecipitation fi-om THF solution into methanol. 

The compound was obtained from Aldrich, and crystals were grown by sublimation in a hot oil bath at approximately 0.02 Torr for 12 hours. A... 

For example, two such polymers had melt viscosities of 11,000 poise (sheath) and 39,000 poise (core) at 260°C and 100 sec. Sheath and core were extruded, respectively, in a 25 mm diameter extruder at 265°C and 35 mm diameter extruder at 275°C. A 1.5 mm diameter concentric die allowed coating of the core with the lower viscosity polyvinylidene fluoride. The filament exited the die in a 250°C air atmosphere followed by cooling in a water bath at 30°C. The fiber next entered a hot oil bath at 165°C where it was stretched at a draw ratio of 5.4. It was subsequently stretched in a second hot oil bath at a draw ratio of 1.22 at 170°C. The last step consisted of relaxation by 5% in hot air at 80°C. A transparent lustrous fiber with a diameter of 128 pm was obtained in which the sheath comprised of 20% by volume. The filament had a birefringence of 0.0395, a tensile strength of 911 MPa, and a break elongation of 20%. Knot strength was 832 MPa and a break elongation of 15%. 

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