From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Patent for a heating and refrigerating liquid composition using water, glycols, and polyglycols.
| Identifier | ExFiles\Box 151\3\ scan0177 | |
| Date | 17th November 1932 guessed | |
| 2 1,213,368 withstand temperatures much above the or- dinary, as well as temperatures below the freezing point of water. It is also of partic- 5 ular value for use in heating systems be- cause of its relatively non-volatile character, and the fact that danger of accidental freez- ing up of the system is thereby prevented at low temperatures. 10 Instead of using the individual glycols with water, or a mixture of two or more glycols with water, in producing the com- position of the present invention, polyglycols can be used, or mixtures of polyglycols, par- 15 ticularly mixtures of polyglycols with the glycols themselves. The polyglycols or mix- tures of polyglycols can be produced by heating the individual glycols or their mix- tures, for varying periods of time. They 20 are usually produced in small amount, and accordingly are present mixed with rela- tively larger amounts of the uncondensed glycols. By varying the relative amounts of the polyglycols the viscosity and other 25 properties of the composition can be corre- spondingly varied and regulated. The viscosity of the glycol water composi- tion can also be varied and regulated by the addition and admixture of glycerin or 30 polyglycerins, either singly or together in varying proportions, as well as by the utili- zation of polyglycols; also, the polyglycols can be utilized together with the glycerin and polyglycerins, for incorporation with 35 the glycol-water composition. Accordingly, I consider the novel com- position of the present invention, in its broader aspect, to include compositions of water and glycols of the 1,2-glycol type 40 whether a single glycol be used, or a mix- ture of two or more glycols, or a mixture of one or more glycols with polyglycols, glycerin or polyglycerins, or mixtures there- of, in varying proportions, and I use the 45 term glycol or glycols with a correspond- ingly broad signification to include, in the glycol-water composition, the individual glycols or polyglycols or mixtures thereof, either alone or with glycerin, polyglycerin, 50 etc. The glycols of the novel composition of the present invention are 1,2-glycols or glycols of the 1,2-glycol type, that is to say, containing their hydroxyl groups on adja- 55 cent carbon atoms, and obtainable, as de- scribed, from unsaturated ethylene hydro- carbons. These 1,2-glycols correspond to the unsaturated hydrocarbons from which they are obtainable. 60 Various liquids have heretofore been pro- posed for use in the cooling systems of automobiles, aeroplanes, etc., in order to pre- vent freezing at low temperatures. Alcohol is sometimes used in place of water, but it 65 is volatile at relatively low temperatures. Glycerin mixtures have also been proposed, but they are of a more viscous nature, par- ticularly where large amounts of glycerin are used, and their circulation is retarded 70 by this fact. The novel composition of the present invention is of a thinly fluid na{Mr Nadin}- ture such that it can readily circulate through the cooling or refrigerating system. It is also capable of withstanding both rela- 75 tively high and low temperatures, as above pointed out. I claim: 1. A heating and refrigerating liquid composition comprising water and glycols 80 of the 1,2-glycol type miscible therewith, said composition being relatively non-vola- tile and remaining liquid at low tempera- tures; substantially as described. 2. A heating and refrigerating liquid 85 composition comprising water and a mix- ture of 1,2-glycols including ethylene, buty- lene and propylene glycols, said composition being relatively non-volatile and remaining liquid at low temperatures; substantially as 90 described. 3. A heating and refrigerating liquid composition comprising about 60 to 65 parts of water and 35 to 40 parts of glycols of the 1,2-glycol type miscible therewith, said 95 composition being relatively non-volatile and remaining liquid at low temperatures; substantially as described. 4. A heating and refrigerating liquid composition comprising about 60 to 65 parts 100 of water and 35 to 40 parts of a mixture of 1,2-glycols including ethylene, propylene and butylene glycols, said composition being relatively non-volatile and remaining liquid at low temperatures; substantially as de- 105 scribed. 5. A heating and refrigerating liquid composition comprising water and a mix- ture of glycols and polyglycols, said compo- sition being relatively non-volatile and re- 110 maining liquid at low temperatures; sub- stantially as described. 6. A heating and refrigerating liquid composition comprising about 60 to 65 parts of water and 35 to 40 parts of a mixture 115 of glycols of the 1,2-glycol type and poly- glycols; said composition being relatively non-volatile and remaining liquid at low temperatures; substantially as described. In testimony whereof I affix my signature. HAROLD HIBBERT Copies of this patent may be obtained for five cents each, by addressing the “Commissioner of Patents, Washington, D.{John DeLooze - Company Secretary} C.” | ||