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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 6680413 | Process for the recovery of phenol and biphenols A process is described for the recovery of phenol and biphenols from their homogeneous mixtures containing benzene, sulfolane and water, which is based on the use of an alkaline solution and benzene for the separation of biphenols from sulfolane, after re... | 01/20/2004 |
| 6066767 | Method of purifying cumene hydroperoxide decomposition products from hydroxyacetone and from other carbonyls Purification of cumene hydroperoxide cleavage products from hydroxyacetone and carbonyl compounds is accomplished via extraction of hydroxyacetone and carbonyl compounds from cleavage products with a circulating water-salt solution in an extractor during ... | 05/23/2000 |
| 5491268 | Process for removal of acidic compounds from phenol process streams A process for purifying phenol, phenol-type compounds, and substituted phenol and phenol-type compounds of contamination by components more acidic than the phenol component comprising treating a phenol containing process stream by contacting the stream wi... | 02/13/1996 |
| 5354429 | Natural cresylic acid processing A discrete impure cresylic acid distillate fraction derived by fractional distillation of a natural cresylic acid feedstock from which tar bases and/or neutral oils have not been removed is subjected to extractive distillation with a polyhydric alcohol ex... | 10/11/1994 |
| 5344528 | Recovery of phenol from low concentrations with sodium sulfate Phenol plant waste water containing small amounts of phenol and sodium sulfate is successfully distilled through the addition of recovered sodium sulfate to enhance the volatility of the phenol relative to water; at least a portion of the sodium sulfate i... | 09/06/1994 |
| 4992599 | Novel purification process Crude phenol and also individual phenol fractions from tars or the hydrogenation of coal are purified from contaminating organic bases and sulfur compounds by treating the phenols with phthalic acid anhydride and optionally a quinone and distillation.... | 02/12/1991 |
| 4443636 | Refining lurgi tar acids There is disclosed a process for removing tar bases and neutral oils from the Lurgi tar acids by treating the tar acids with aqueous sodium bisulfate to change the tar bases to salts and to hydrolyze the neutral oils to hydrolysis products and distilling ... | 04/17/1984 |
| 4429170 | Process for removing tar bases from Lurgi tar acid stream A process is disclosed for purifying the tar acid mixture that is obtained from the Lurgi process of coal gasification. The tar acid is treated with dilute aqueous sulfuric acid solution to form non-volatile tar base salts from the tar base component and ... | 01/31/1984 |
| 4356330 | Method of decolorizing mixtures of T-butyl alkylphenols with N-(2-hydroxyethyl)oxazolidine A method of eliminating color-causing impurities in mixtures of t-butyl alkylphenols by treatment with N-(2-hydroxyethyl)oxazolidine at 90° C. and at atmospheric pressure is described. These phenols are used as peroxide inhibitors in polyoxyalkylene glyc... | 10/26/1982 |
| 4327229 | Recovery of bisphenol-A values An improved process is described for recovery of some of the bisphenol-A values present in the waste streams in an acid-catalyzed bisphenol-A synthesis process.... | 04/27/1982 |
| 4208280 | Extraction method Covers a method of separating a nonionic surfactant from an anionic surfactant by use of cyclohexanone.... | 06/17/1980 |
| 4162902 | Removing phenols from waste water A process for removing phenols from waste water resulting from the gasification or carbonization of coal and containing CO2, H2 S and NH3, comprising mixing the waste water with a low-boiling organic solvent, separating th... | 07/31/1979 |
| 4147735 | Separation of organic compounds from mixtures by clathration A method for the separation of organic compounds by clathration in which there is used as a host a compound of formula I: ##STR1## wherein: Ar1 Ar2 and Ar3 and Ar4, which may be identical or different, repr... | 04/03/1979 |
| 4113975 | Process for purifying alkylphenolz A process for the removal of acids and potential acid-forming agents from a composition containing such acids and potential acid-forming agents and an alkylphenol which composition is obtained by reacting phenols with alkenes in the presence of sulfuric a... | 09/12/1978 |
| 4025423 | Process for removing monohydric and polyhydric phenols from waste water Monohydric and polyhydric phenols are removed from waste water together with hydrogen sulfide, free and combined ammonia, by extraction and distillation. The waste water is formed during the degasification or gasification of coal and is subsequently subje... | 05/24/1977 |
| 3974084 | Process for the manufacture of anhydrous alkali metal arylate solutions and separation of the arylates from alkali metal sulfite Anhydrous organic solutions of alkali metal arylates are prepared by dissolving an alkali metal arylate or reacting an arylhydroxy compound with alkali metal hydroxide in a ketone immiscible or incompletely miscible with water at room temperature and remo... | 08/10/1976 |
