Yield Intrinsic

Polymer % catalyst concentration % yield intrinsic viscosity T) (dl/g) at 30°C... 

Pyridine M Ligand ratio, N/Cu X 10 mole 1 min-1 Oxygen absorbed % Fractional Yields Intrinsic viscosity decil. g x... 

By using such a model, it was found that the pilot plant data for the three commercial shift catalysts yielded intrinsic kinetic rate constants and activation energies in good agreement with experimental values for small catalyst particles with no diffusional limitation. Ruthven also derived expressions to account for the effect of pressure on catalytic activity. 

Rate measurements with well-stirred vessels may be continuous or hatch. An example of the latter is simply a stirred flask. The former include the AKIIFVE apparatus8 and bench-scale models of mixer-senler contactors Because the interfacia) area and mass transfer conditions in these systems are not known, they generally do not yield intrinsic heterogeneous rale data for metal-extraction systems. Nevertheless, they are useful for screening relative rates and identifying cases where slow kinetics may be a problem. 

A plot of tj Jcversus c/M yields intrinsic viscosity of the unimer (in-... 

Model That Yields Intrinsically Smooth Potential-Energy Surfaces. 

Preparation of II. Aqueous potassium ferricyanide (0.329 g, 0.001 m) was added dropwise over a 27 minute period to a vigorously stirred mixture of a solution of 3,4-dibromo-2,6-dimethyl-phenol (I) (2.80 g, 0.01 m) in 150 ml benzene euid 150 ml aq. 2% solution of potassivon hydroxide at 25 under a nitrogen atmosphere. After 170 minutes, the benzene layer was separated and washed with 10% hydrochloric acid and then with water. The solution was added dropwise to 500 ml metheuiol. The polymer was filtered off, washed with methanol, and dried 20 hours at 25 and 12 Torr. Weight 2.0 g (100% yield). Intrinsic viscosity ... 

Copolymerization of VII and I. A solution of VII (4.88 g, 0.04 m) and I (2.80 g, 0.01 m) in 50 ml benzene was added to a stirred (Vibromixer) oxygenated solution of cuprovis bromide (0.072 g. 0.0005 m) and dibutylamine (2.58 g, 0.02 m) in 50 ml benzene at 25 (stirred water bath). After 10 minutes, the temperature rose to 38.5 , then slowly decreased. After 120 minutes, the solution was added dropwise to 750 ml methainol containing 5 ml hydrochloric acid- The polymer was filtered off, washed with methanol and dried. Weight 6.54 g (96% yield). Intrinsic viscosity 0.51 dl/g. The polymer could be cast from chloroform solution to form a cleeir, transparent flexible film. The nmr spectrum and elemental analysis indicated a 4 1 ratio of poly(phenylene oxide) units to poly(monobromophenylene oxide) vmits. 

Reaction Example Polymerization Yield, % Intrinsic Viscosity, liter/g Yellowness Index (165°Cfor72hrs)... 

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