Cold Pelletizing

The carbonization of coke pellets is attracting increased attention and pelletizing of coal-ore mixtures, with an addition of lime if necessary, has received attention. The pellets are heated to 550°C-650°C (1020°F-1200°F) and subsequently carbonized with sand as heat carrier. 

Another process for pelletizing caking coal fines and carbonizing the pellets involves the conversion of caking coal fines into pellets. In the second stage, the pellets are coated with hematite ore (Fe203) and the ore-covered pellets are then coked whereupon soften and sinter together to form a 

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Protrusions are surface imperfections of the conductor shield or of the insulation shield ingressing into the insulation. Die drool, foreign matter in the semiconductive material, uneven heat causing "cold pellets" are a few of the possible causes. Their effect is enhanced when their location is at the point of highest electrical stress, at the conductor shield - insulation interface. This enhancement is given by Bahder (10) and Bateman (11) assuming ellipsoid shape ... 

Thus, cold pellets of both polymers are fed into extmder where they are gradually heated up. 

Experimental Diets. The three experimental diets used were based on the AIN-93 (35) formulation with several modifications to obtain the extremely low n-3 fatty acid level required in this study (Table 1). The custom-pelleted diets were obtained commercially and employed a cold pelleting process to preserve unsaturated fats (Dyets, Bethlehem, PA). The dependent variable in the two artificially reared groups was the substitution of a-linolenic acid ethyl ester for oleic acid ethyl ester in the n-3 Adq diet. The maternal diet contained a fatty acid composition similar to that of the n-3 Adq diet but made up with a mixture of safflower and flax oils due to the greater quantity of diet to be consumed. All three diets contained 10 wt% fat and had a similar Unoleic acid content. The rats were fed these diets until they were sacrificed. 

Thorium fuel has also been produced along two alternative routes, the cold pelletization and sintering route, and e pellet impregnation method used for (Th -I- U) MOX. This latter method uses an interesting technique in which Th02 pellets of low density are suspended in a high-temperature uranyl nitrate bath where they soak up The conven-... 

When three consistent readings are obtained, add a weighed pellet of the solute to T for this purpose it is important that the thermometer is not withdrawn, and the boiling is not interrupted. It is best to hold the pellet ready in a pair of forceps near the mouth of the side-arm of T, and then momentarily to remove the condenser, drop in the pellet and replace the condenser when the condenser is removed a small quantity of cold air entering the side-arm will cause slight condensation of the hot vapour, none of which will therefore escape. 

Place 50 g. (57 ml.) of dry A.R. benzene and 0 5 ml. of dry p rridine (1) (dried over potassium hydroxide pellets) in a 500 ml. round-bottomed flask. Attach a reflux condenser to the flask and an inverted funnel (just dipping into some water in a beaker) to the top of the condenser (Fig. II, 13, 8, b). Partially immerse the flask in a bath of cold water, supported upon a tripod and gauze. Carefully pour 125 g, (40 ml.) of bromine (for precautions to be taken with bromine, see Section 111,35, Note 1) through a condenser and immediately insert the absorption device into the upper end of the condenser. A vigorous reaction soon occurs and hydrogen bromide is evolved which is absorbed by the water in the beaker when the reaction slackens, warm the bath to 25-30° for... 

In an 800-ml. stainless-steel flanged beaker are placed 240 g. of potassium hydroxide pellets and 50 ml. of water. When the mush has cooled, 40.0 g. (0.263 mole) of 2-hydroxy-3-methyl-benzoic acid (Note 1) is added, and the slurry is stirred with a long glass rod. The beaker is placed firmly in a clamp (Note 2) and set in a cold oil bath (Note 3) in a hood, and 240 g. (1.00 mole) of lead dioxide is stirred in all at once (Note 4). The oil... 

A cold mixture of sulfuric acid (98%, 4 g), and water (4 mL) was added to an amino-alcohol 25 (40 mmol) in water (2.4 mL) at 0-5°C. The mixture was heated to 120°C and then water was carefully distilled off in vacuo. The solid sulfate residue was treated with 6.2 M potassium hydroxide, and steam-distilled. The distillate was saturated with potassium hydroxide pellets and the upper organic layer, which separated, was fractionally distilled from potassium hydroxide through a short column to give a colorless oil aziridine 26 in 96% yield. 

A 100 gallon lined jacketed kettle provided with cooling is charged with 100 lb of benzyl-amine and 150 liters of water. The mixture is cooled to 5°C and with stirring 119 lb of /3-chloropropionyl chloride and a solution of 45 lb of sodium hydroxide pellets in 40 liters of water are added simultaneously at such a rate that the temperature does not exceed 10°C. During this period the pH of the mixture should be on the alkaline side but below pH 9.5. When the addition is complete the pH should be about 8. The mixture is stirred overnight in the cold, and the solid product is filtered. The filter cake is reslurred with about BO gallons of water, filtered, and air-dried. Yield, 12B pounds. 

Step 1. Frozen arms are ground with cold water, and centrifuged. The pellets are further ground with water and centrifuged. The supernatants are combined, saturated with ammonium sulfate, and the precipitate formed is collected by centrifugation. 

The frozen shells were ground in a cold mortar with 50 mM sodium acetate buffer, pH 5.8, containing 10 mM EGTA and 0.2 M NaCl, then the mixture was centrifuged. The pellets were re-extracted with the same buffer, and centrifuged. All supernatants were combined, and the photoprotein was precipitated with ammonium sulfate. The photoprotein in the precipitate was purified by four steps of column chromatography at near 0°C. Due to the instability of the photoprotein, efforts were made to reduce the time required for purification. 

In order to solubilize the bound luciferase, the pellet is homogenized with 20-30 volumes of cold 10 mM Tris-HCl buffer, pH 7.5, containing 1M NaCl, and the activity of the homogenate is measured. The homogenate is centrifuged and the activity of supernatant is also measured. A close agreement between the two measurements indicates that 1 M NaCl has solubilized the bound luciferase. If the two values differ significantly, a further effort of solubilization is needed (see Section C1.3). 

The apparatus consists of a 3-]. three-necked flask fitted with a mercury-sealed mechanical stirrer, a reflux condenser, a dropping funnel, and a thermometer which reaches almost to the bottom of the flask. Five hundred grams of potassium hydroxide pellets (85 per cent potassium hydroxide) (7.5 moles) and 750 cc. of commercial absolute methyl alcohol (free from acetone) are placed in the flask and stirring begun. The bulk of the alkali dissolves in a few minutes, with the evolution of heat. The flask is now surrounded by an ample cold-water bath, and, when the internal temperature drops to 6o°, addition of a mixture of 360 g. (353 cc., 3 moles) of -tolualdehyde (Note 1), 300 cc. of formalin (3.9 moles) (Note 2), and 300 cc. of absolute methyl alcohol is begun at such a rate that the internal temperature remains at 60-70°. This addition requires about fifteen minutes. The internal temperature is then maintained at 60-70° for three hours, after which the reflux condenser is replaced by a downward condenser, and the methyl alcohol distilled with the aid of a brine bath until the internal temperature reaches ioi°. Nine hundred cubic centimeters of cold water is then added to the warm residue, and the mixture cooled. The resulting two layers are separated at once (Note 3), and the aqueous layer extracted with three 200-cc. portions of benzene. The combined oil and extracts are washed with five or six 50-cc. portions of water (Note 4), and the combined washings extracted... 

Most of the NO reducing catalysts in pellet or monolithic form begin to lose their activity at 2000 miles and fail to be effective at 4000 miles. This lack of durability may well be connected to the usage of the NO bed for oxidation purposes during the cold start, which exposes the NOx catalysts to repeated oxidation-reduction cycles. Better catalyst durability can be anticipated in the single bed redox catalyst with a tightly controlled air-to-fuel ratio, since this oxidation-reduction cycle would not take place. Recent data indicates that the all metal catalysts of Questor and Gould may be able to last 25,000 miles. 

Method of Iqbal et al. (7) for NMOR determination. The published method (2) was used, with slight modifications. In brief, the frozen mouse (stored for 1-7 days in liquid N ) was blended to give a powder and 5-g samples were reblended with 75 mL ice-cold 35% aqueous methanol. The mixture (which was at pH 7.6) was centrifuged at 5 C and the pellets were re-extracted with aqueous methanol. The combined aqueous method extract was extracted twice with CH2C12 Our method was used from then on, i.e., the extract was passed through a Celite column, concentrated, and subjected to GC-TEA as before. 

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