Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 6245200 | Photo-oxidation method using MoS2 nanocluster materials A method of photo-oxidizing a hydrocarbon compound is provided by dispersing MoS2 nanoclusters in a solvent containing a hydrocarbon compound contaminant to form a stable solution mixture and irradiating the mixture to photo-oxide the hydrocarb... | 06/12/2001 |
| 6093858 | Method for producing bis (trifluoromethyl) benzene The invention relates to a method for producing a bis(trifluoromethyl)benzene. This method includes the steps of (a) chlorinating a compound represented by the general formula (1) by chlorine, thereby to produce a trichloromethyltrifluoromethylbenzene; an... | 07/25/2000 |
| 5841004 | 3-substituted-, ଲ-dibromoethylbenzene and process for preparing the same A novel 3-substituted ,ଲ-dibromoethylbenzene of formula (I): ##STR1## wherein X represents a halogen atom or a trihalomethyl group, which is useful as an intermediate for pharmaceuticals or agricultural chemicals, is prepared by a simple... | 11/24/1998 |
| 5674949 | Liquid-phase fluorination This invention pertains to a method for liquid-phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 10/07/1997 |
| 5571870 | Liquid phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 11/05/1996 |
| 5539059 | Perfluorinated polyethers This invention pertains to perfluoropolyethers and perhalogenated chlorofluoropolyethers that can be prepared by fluorinating addition polymers made by polymerizing epoxides.... | 07/23/1996 |
| 5461117 | Liquid phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 10/24/1995 |
| 5354439 | Process for the synthesis of fluorinated derivatives A process for the synthesis of fluorinated organic compounds and a reagent suitable for use in the process. The process is carried out by exchange with fluorides, while preferably agitating the reaction medium with ultrasonic sound.... | 10/11/1994 |
| 5354926 | Fluoroalkylated fullerene compounds This invention provides a mixture of fluoroalkylated fullerene compounds, preferably perfluoroalkylated fullerene compounds, comprising the formula, (C60+2n)R1m R2b Zy, wherein R1 is ... | 10/11/1994 |
| 5332790 | Liquid-phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 07/26/1994 |
| 5322904 | Liquid-phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 06/21/1994 |
| 5264094 | Process for the preparation of fluorobenzenes Process for the preparation of fluorobenzenes having at least one hydrogen atom as ring substituent and, optionally, further substituents, which, independently of each other, can be chlorine, bromine, nitro, hydroxyl, C1 -C3 -alkoxy ... | 11/23/1993 |
| 5157173 | Process for 4-chlorobenzotrichloride 4-chlorobenzotrichloride was prepared by the chlorination of p-xylene in the vapor phase at a temperature above about 200° C. in the presence of an activated carbon catalyst and water. An approximately 75 percent calculated yield was obtained at 250° C.... | 10/20/1992 |
| 5093432 | Liquid phase fluorination This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.... | 03/03/1992 |
| 4968830 | Aromatization process Halogen substituted aromatic compounds of the formula ##STR1## wherein Y is selected from the group CO2 H, COF, COCl, COBr, CF3, CN, NCO, or F, and X and X' are independently hydrogen or a halogen selected from the group F-, Cl-... | 11/06/1990 |
| 4943358 | Oxidation process It is desired to find an alternative way to produce benzophenones or substituted benzophenones which does so selectively and avoids the problems of previous methods that use, for example, large amounts of an aluminium chloride catalyst or nitric acid. In ... | 07/24/1990 |
| 4923580 | Bromination Selective bromination of alkylarenes to the alpha dibrominated derivative is desirable as a precursor for the selective production of, for example, the corresponding aromatic aldehyde. Improvements in the extent of selectivity of the product and/or its rate of... | 05/08/1990 |
| 4686024 | Novel perfluoro chemicals and polyfluorinated compounds and process for production of the same The present invention relates to novel perfluoro chemicals (PFC), particularly perfluorocyclic ethers and polyfluorinated compounds containing a few chlorine atoms and to a method for the preparation thereof.... | 08/11/1987 |
| 4684452 | Process for the fluorination in liquid phase of unsaturated compounds Process for the fluorination with elemental fluorine of fluorinated olefins, carried out in liquid phase using a perfluoropolyether as solvent, at temperatures comprised within the range of from -25° C. to +120° C., by using gaseous fluorine diluted wit... | 08/04/1987 |
| 4601853 | (2-fluoro-5,6,11,12-tetraselenotetracene)2 chloride The novel complex of the formula I ##STR1## is an organic material with a high electrical conductivity and with a metallic phase transition at about 125° K. under normal pressure, at which the conductivity increases suddenly. The complex can be used... | 07/22/1986 |
| 4345983 | Method for disposal of chemical waste A process for the safe and efficient disposal of toxic chlorinated hydrocarbon waste materials in which the chlorinated hydrocarbon is brought into close surface contact with a finely divided para- or ferromagnetic material, such as a fluidized bed of iro... | 08/24/1982 |
| 4188274 | Process for trifluoromethylation of aromatic and heterocyclic compounds A decarboxylation process for coupling aromatic compounds wherein cyclic hydrocarbons and heterocyclic compounds having at least one labile ring hydrogen are reacted with the mono silver salts of aromatic carboxylic acids, or mono silver salts of unsatura... | 02/12/1980 |
| 4087342 | Method of simultaneously carrying out plurality of photochemical reactions A photochemical reaction system is provided in which a single polychromatic light source is used to simultaneously irradiate a plurality of photochemical reactions with different regions of the spectrum. In this system, the reactions are carried out in se... | 05/02/1978 |
| 4046656 | Photochlorination process for methyl aromatic compounds The rate of photochlorination of methyl aromatic compounds, such as toluene, cresol, xylene, toluenesulfonyl chloride, methylnaphthalene, diphenylmethane, etc., is increased when carried out in the presence of bromine.... | 09/06/1977 |
