摘要:
Sintered alumina of low porosity and Na content is made from calcined alumina of 2-6 micron average particle size and about 0.2-1% by weight Na.sub.2 O content by treating the calcined alumina with a synergistically acting combination of a magnesium salt and a boron compound. Suitable magnesium salts include magnesium halides, nitrate, sulfate, acetate and stearate, the water-soluble salts being preferred. As boron compound H.sub.3 BO.sub.3 or B.sub.2 O.sub.3 can be employed. The quantity of magnesium salt in the combination, calculated as Mg, is kept in the range of about 0.01-0.3% by weight of Al.sub.2 O.sub.3, while the boron content, calculated as B.sub.2 O.sub.3, is maintained in the range of about 0.1-1% by weight of Al.sub.2 O.sub.3. Used of the synergistically acting combination in the indicated range allows manufacture of sintered alumina products of less than about 3% total porosity and less than about 0.03% by weight Na content.
摘要:
An absorption heat pump achieves improved efficiency by lowering the low cycle temperature of the circulation fluid. This is accomplished by adding a crystallization-inhibiting compound to the circulation fluid which substantially depresses the temperature at which the absorbent salt in the fluid begins to crystallize.
摘要:
An absorption heat pump achieves improved efficiency by lowering the low cycle temperature of the circulation fluid. This is accomplished by adding a crystallization-inhibiting compound to the circulation fluid which substantially depresses the temperature at which the absorbent salt in the fluid begins to crystallize.
摘要:
Systems and a method for forming carbon allotropes are described. An exemplary reactor system for the production of carbon allotropes includes a hybrid reactor configured to form carbon allotropes from a reactant gas mixture in a Bosch reaction. The hybrid reactor includes at least two distinct zones that perform different functions including reaction, attrition, catalyst separation, or gas separation.
摘要:
A water treatment agent and method of treating water to inhibit, reduce, or prevent the formation of algae and bacteria in a water body. The water treatment agent may include copper sulfate penta-hydrate and/or silver, di-sodium ethylene di-amine tetra-acetic acid dihydrate, a scale inhibitor, a shocking agent and a buffer agent. For instance, the treatment agent may include a composition of copper sulfate pentahydrate, di-sodium ethylene di-amine tetra-acetic acid, monopotassium phosphate or sulfuric acid, and potassium monopersulfate and 1-hydroxyethylidene-1,1-diphosphonic acid.