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| Number | Title | Issue Date |
| 6203671 | Method of producing fluorinated compounds A process for preparing a fluorinated product comprising: (a) reacting a molar excess of an aliphatic starting compound in liquid phase with fluorine in the presence of actinic radiation to produce a product mixture containing a fluorinated product having... | 03/20/2001 |
| 6156163 | Reactant, compound and process for the perfluoroalkylation of the nucleophile, and the derivatives obtained A reagent comprising a compound of formula (I): Rf --M(X) (Z)n --Y--R, wherein R is a hydrocarbon radical advantageously having at most 10 carbon atoms and being selected from alkyls and aryls; Rf is a radical of formula I... | 12/05/2000 |
| 6068737 | Simultaneous demetallization and desulphuration of carbonaceous materials via microwaves The process of demetalization and desulphuration of a mixture of carbonaceous material in an acid medium subjecting the mixture to the influence of wave energy in the microwave range, recovering, afterwards, the sulphur and separating the treated material... | 05/30/2000 |
| 5688379 | Process for preparing perfluoroalkyl bromides The present invention provides a process for preparing a perfluoroalkyl bromide characterized by reacting a perfluoroalkyl iodide represented by the formula Cn F2n+1 I wherein n is an integer of 6 to 10 with bromine in a light-transm... | 11/18/1997 |
| 5449801 | Reactive distillation process for free radical halogenation A process for the selective high yield halogenation R--CH3 wherein R is ##STR1## Si(Cl)m (CH3)n, wherein m is 1 to 3, n is 1 to 3 and m+n is 3; phenyl; or phenyl substituted with Cl, Br, F, OR1, ... | 09/12/1995 |
| 5110425 | Terminal chlorination of normal alkane hydrocarbons A terminally chlorinated normal alkane hydrocarbon is produced at high terminal selectivity, by adsorbing a normal alkane into a select zeolite and chlorinating the adsorbed alkane in the zeolite. The zeolite may be of a type having internal channels of d... | 05/05/1992 |
| 5051158 | Process for preparing controlled molecular weight perfluoropolyethers having perfluoroalkyl or perfluorochloroalkyl end groups This invention relates to preparing perfluoropolyethers having neutral end groups by a process based on the photooxidation of C3 F6 and/or C2 F4, thereby obtaining controlled molecular weight products having per... | 09/24/1991 |
| 5000830 | Process for the production of perfluoropolyethers substantially constituted by perfluorooxyethylene and perfluorooxypropylene units Improved process for producing perfluoropolyethers prevailingly constituted by repeating units --CF2 CF2 O-- and ##STR1## with perfluoroalkyl terminal groups, wiith a mutual ratio of the above C3 /C2 units ... | 03/19/1991 |
| 4997988 | Oxa-organic sulfur compounds, their preparation and use Oxa-organic sulfur compounds, methods of preparing such compounds and methods of using the compounds as polymer chain length terminating agents are provided. The compounds are prepared by reacting allyl alcohol in the presence of a basic catalyst with a c... | 03/05/1991 |
| 4978435 | Free chlorine removal process Free chlorine values are removed by radical chlorination from uncombined admixtures thereof, notably admixtures of free chlorine and at least one halogenated organic compound that is not completely chloro-substituted.... | 12/18/1990 |
| 4971664 | Terminal chlorination of normal alkane hydrocarbons A terminally chlorinated normal alkane hydrocarbon is produced at high terminal selectivity, by adsorbing a normal alkane into a select zeolite and chlorinating the adsorbed alkane in the zeolite. The zeolite may be of a type having internal channels of d... | 11/20/1990 |
| 4902393 | Process for the production of 1,1,2-trichloro-2-methylpropane A process for the production of 1,1,2-trichloro-2-methylpropane comprises reacting 1-chloro-2-methylpropene with sulfuryl chloride. This reaction takes place preferably under the effect of light, especially UV light and/or in the presence of an aldehyde a... | 02/20/1990 |
| 4874488 | Photochemical dimerization and functionalization of alkanes, ethers, primary and secondary alcohols, phosphine oxides and silanes The space-time yield and/or the selectivity of the photochemical dimerization of alkanes, ethers, primary and secondary alcohols, phosphine oxides and primary, secondary and tertiary silanes with Hg and U.V. light is enhanced by refluxing the substrate in... | 10/17/1989 |
| 4859299 | Novel perfluoropolyether and process for producing the same A novel perfluoropolyether containing 0.1 to 10% by weight of halogen atoms as bonded in the molecule is obtained by reacting tetrafluoroethylene with oxygen in a fluorinated solvent or a chlorofluorinated solvent under ultraviolet irradiation in the pres... | 08/22/1989 |
| 4855025 | Polyfluoro compounds and method for preparing them This invention relates to compounds which simultaneously contain a perfluorinated chain and a hydrogenated chain and which correspond to the general formula: ##STR1## in which RF is a perfluoroalkyl radical, m an integer from 0 to 2, ... | 08/08/1989 |
| 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 |
| 4675088 | Synthesis of Rf OTeF5 Pentafluorotellurium hypohalites are reacted with fluorocarbon iodides to form intermediate adducts which are thereafter decomposed to form fluorocarbons containing the TeF5 O-- group.... | 06/23/1987 |
| 4664765 | Photochemical synthesis of allenic and propargylic organomercuric halides Propargylic halides, preferably the bromide and iodide, react with metallic mercury in a finely divided state, in the presence of sunlight to form the corresponding allenic or propargylic organomercuric halides in high yield.... | 05/12/1987 |
| 4488953 | Purification of recycled paraffins in photochlorination process An improved process for the photochlorination of normal paraffins to prepare mono-chlorinated alkanes, in which the normal paraffin feed stream is only partially chlorinated and the unreacted normal paraffins separated and recycled, the recycled unreacted... | 12/18/1984 |
| 4030994 | Substitutive fluorination of organic compounds Organic compounds having at least one replaceable hydrogen atom are fluorinated in the liquid or solid state by treatment with fluoroxyperfluoroalkanes or fluoroxypentafluorosulfur under the influence of a free radical initiator.... | 06/21/1977 |
| 3993554 | Method of producing n-paraffin oximes A process for converting mixtures of C6 to C30 n-paraffin and n-paraffin by-products to substantially pure n-paraffin which comprises catalytically hydrogenating the mixture at a temperature of from about 600° to 750° F. in the pre... | 11/23/1976 |
| 3956090 | Hydrocarbon upgrading process in paraffin oxime production A process for converting mixtures of C6 to C30 n-paraffin and n-paraffin by-products to substantially pure n-paraffin which comprises catalytically hydrogenating the mixture at a temperature of from about 600° to 750°F. in the pres... | 05/11/1976 |
| 3951770 | Hydrocarbon conversion Chemical processing of normal-paraffin hydrocarbons may be carried out with increased selectivity by use of a normal-paraffin hydrocarbon reactant which is adsorbed on the surface of a solid adsorbent such as diatomaceous earth prior to treatment in a fre... | 04/20/1976 |
| 3948741 | Liquid phase chlorination of normal paraffins Selective chemical processing of normal paraffin hydrocarbons may be carried out with increased selectivity by reacting a normal paraffin hydrocarbon reactant, in the presence of inert solvents, in a free radical (e.g., photochemically) initiated reaction... | 04/06/1976 |
