摘要:
New heat transfer agents containing at least three components consisting of by volume 5 to 90% of diphenyl oxide, 5-50% of biphenyl and 5 to 90% of polyphenyl ether having 3 or 4 aromatic nuclei, alkylated biphenyl or diphenyl oxide having 1-4 methyl or ethyl substituents, ethylbenzene oil and mixtures thereof have been discovered.
摘要:
A granular ceramic heat carrier for use in conjunction with chemical processes, the granules of which heat carrier contain the oxides of aluminum, silicon, chromium and iron, and a method of manufacturing said granular ceramic heat carrier comprising preparing a mix from alumina, fire clay and chrome are powders and a binder.
WHERE R1 AND R2 ARE BYDROGEN OR METHYL; R3 AND R4 ARE EACH AN INDEPENDENTLY SELECTED ALKYL GROUP HAVEING FROM 1 TO 20 CARBON ATOMS; R5 IS THE ORGANIC RESIDUE EXCLUSIVE OF REACTIVE HYDROXYL GOUPS OF A POLYOL, P IS AN INTEGER OF FROM 2 TO 6 INCLUSIVE AND N AND M ARE POSITIVE INTEGERS INDEPENDENTLY SELECTED IN EACH CHAIN AND WHOSE SUM IN EACH CHAIN IS FROM 2 TO 20, ARE PREPARED BY SUCCESSIVELY REACTING BORIC ACID WITH A GLYCOL MONOETHER AND A POLYOL. THESE ESTERS ARE USEFUL AS STABILIZERS AND CORROSION INHIBITORS FOR LUBRICANTS AND NON-AQUEOUS HYDRAULIC FLUIDS.
摘要:
THE LONG TERM THERMAL STABILITY OF HALOGENEATED POLYPHENYL HEAT TRANSFER FLUIDS IS IMPROVED BY ADDING A PHOSPHOROUS COMPOUND TO THE FLUID AND PROVIDING AN INERT GAS PURGE TO SWEEP GASEOUS DECOMPOSITION PRODUCTS FROM THE HEAT TRANSFER SYSTEM. FLUIDS MAINTAINED IN THIS MANNER ARE LESS CORROSIVE, FORM LESS SOLID DECOMPOSITION PRODUCTS, AND UNDERGO A SMALLER VISCOSITY INCREASE THAN UNTREATED FLUIDS WHEN EXPOSED TO HIGH TEMPERATURE APPLICATIONS FOR EXTENDED PERIODS.
摘要:
Corrosion resistant antifreeze compositions consisting essentially of at least one antifreeze fluid having from 1 to 4 carbons inclusive and from 1 to 3 hydroxy groups inclusive and a minor but effective amount sufficient to inhibit corrosion of an alkali metal dialkyl phosphate. The alkali metal dialkyl phosphate can be represented by the formula:
摘要:
Dichlorodifluoromethane (CC12F2) and 1,1,1,2-tetrafluoroethane (CF3CH2F), in certain proportions, form an azeotrope and essentially azeotropic mixtures, which are constant boiling, or essentially constant boiling, and which mixtures possess refrigeration capacities higher than either of the CC12F2 and CF3CH2F components alone. These mixtures are especially adapted for use in systems having high-condensing temperatures such as automobile air conditioning systems.
摘要:
IMPROVED HEAT TRANSFER ADDITIVES FOR LITHIUM BROMIDE ABSORBENT SOLUTIONS ARE SELECTED FROM A CLASS OF TERTIARY ALCOHOLS. THE TERTIARY ALCOHOLS HAVE GREATER OXIDATIVE STABILITY AND, THEREFORE, DO NOT REACT AS RAPIDLY WITH THE CHROMATE CORROSION INHIBITORS WHICH ARE COMMONLY USED IN THE ABSORBENT SOLUTIONS. IN ALL CASES, THE HEAT TRANSFER IMPROVEMENT IS AT LEAST AS GOOD AS KNOWN, LESS STABLE, PREMARY (AND SECONDARY) ALCOHOLS.