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| Number | Title | Issue Date |
| 7956228 | Method and device for producing acetylene and synthesis gas by rapidly mixing the reactants A process for the preparation of acetylene and synthesis gas by partial thermal oxidation in a reactor which has a burner having passages, wherein the starting materials to be reacted are rapidly and completely mixed only immediately before the flame reaction zone i... | 06/07/2011 |
| 7217851 | Synthesis of butadiynes Provided is a method for the synthesis of 1,4-dicyclopropyl-1,3-butadiyne from CPA. Such butadiyne is prepared by oxidative coupling of cyclopropyl acetylene (CPA) using catalytic amounts each of copper (I)chloride and tetrametylethylenediamine (TMEDA) in isopropano... | 05/15/2007 |
| 7119240 | Method for converting natural gas to olefins A process for converting natural gas to an olefin includes heating the gas to a selected range of temperature to convert a fraction of the gas stream to reactive hydrocarbons, primarily ethylene or acetylene, and reacting with hydrogen in the presence of a catalyst ... | 10/10/2006 |
| 6967256 | Formation of enediynes by reductive coupling followed by alkyne metathesis One aspect of the present invention relates to methods of preparing enedialkylidyne complexes, enediynes, and alkyne metathesis catalysts, as well as methods of catalyzing alkyne metathesis reactions. The present invention also relates to methods of activating enedi... | 11/22/2005 |
| 6849664 | Process for disposing biocide-containing cooling water The present invention relates to the use of deactivatable biocides in cooling water systems of industrial processes that require dissipation of heat. The present invention relates to methods of inhibiting growth and reproduction of microorganisms in the cooling wate... | 02/01/2005 |
| 6632484 | Dialkyne compounds Described are dialkyne compounds of the formula I ##STR1## in which n, m, R1, R2, X1, X2, X3, X4, Z1, Z2, A1, A2, Q, Y1 and Y2 a... | 10/14/2003 |
| 6602920 | Method for converting natural gas to liquid hydrocarbons A process for converting natural gas to a liquid includes heating the gas to a selected range of temperature to convert a fraction of the gas stream to reactive hydrocarbons, primarily ethylene or acetylene, and reacting methane and the reactive hydrocarb... | 08/05/2003 |
| 6570046 | Composition for acetylene production and method for treating lime slurry by-product from acetylene production The use of a settling aid in the reactor during acetylene production results in the by-product lime slurry being easier to handle and allows the acetylene producers to use different sources of calcium carbide as well as the calcium carbide manufacturers t... | 05/27/2003 |
| 6392112 | Ordered polyacetylenes and process for the preparation thereof Polyacetylene compounds and process for the preparation thereof from a chiral dihydroxy amide are described. The compounds preferably have diacyl groups attached to the amide. The compounds are useful for making films which are electrically conductive, ne... | 05/21/2002 |
| 6392110 | Ordered polyacetylenes and process for the preparation thereof Polyacetylene compounds and process for the preparation thereof from a chiral dihydroxy amide are described. The compounds preferably have diacyl groups attached to the amide. The compounds are useful for making films which are electrically conductive, ne... | 05/21/2002 |
| 6365792 | Preparation of acetylene and synthesis gas The invention relates to a process for the preparation of acetylene and synthesis gas by thermal treatment of a starting mixture containing one or more hydrocarbons and in addition molecular oxygen and/or one or more compounds containing the element oxyge... | 04/02/2002 |
| 6359164 | Process for the preparation of cyclopropylacetylene The present invention relates generally to novel methods for the preparation of cyclopropylacetylene which is an essential reagent in the asymmetric synthesis of (S)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-ben zoxazin-2-one;... | 03/19/2002 |
| 6333443 | Process for the production of methylacetylene and propadiene A process for producing methylacetylene and propadiene in a reaction zone which is elongate in one direction (one axis) comprises a heating zone and a cooling zone following said heating zone, in which a gas mixture comprising at least one hydrocarbon con... | 12/25/2001 |
| 6313364 | Synthesis of cyclopropaneacetylene using a catalytic decarboxylation reaction The present invention relates to a process for the preparation of cyclopropaneacetylene by the two step process: (1) an alkylation of propiolic acid with a 1,3-disubstituted propane followed by a cycloalkylation to give a 3-cyclopropaneacetylene carboxyli... | 11/06/2001 |
| 6297410 | Process for the preparation of cyclopropylacetylene The present invention relates generally to novel methods for the synthesis of cyclopropylacetylene which is an essential reagent in the asymmetric synthesis of (S)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-ben zoxazin-2-one; a... | 10/02/2001 |
| 6235957 | Process for the preparation of cyclopropylacetylene The present invention relates generally to novel methods for the synthesis of cyclopropylacetylene which is an essential reagent in the asymmetric synthesis of (S)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-ben zoxazin-2-one; a... | 05/22/2001 |
| 6207864 | Process for preparing cyclopropylacetylene The invention relates to a process for the halogenation of cyclopropylmethyl ketone with at least one dihalo-triorganophosphorane of the general formula I R3 PHal2 (I), in which the radicals R can be the same or different and denote a s... | 03/27/2001 |
| 6203724 | Crosslinked cyclohexane derivatives, and liquid-crystalline medium The invention relates to cyclohexane derivatives of the formula I ##STR1## in which R, R1, R2, R3, A, A1, A2, A3, Z, Z1, Z2, Z3, B, B1, X, p, m, n, r ... | 03/20/2001 |
| 6180835 | Process for the preparation of cyclopropylacetylene derivatives A cyclopropylacetylene derivative of the formula (V): ##STR1## is prepared by reacting a propynol derivative of the formula (I): ##STR2## with a propane derivative of the formula (VI): ##STR3## in the presence of a base in an amount of 2 or more equivalen... | 01/30/2001 |
| 6130260 | Method for converting natural gas to liquid hydrocarbons A process for converting natural gas to a liquid includes heating the gas to a selected range of temperature to convert a fraction of the gas stream to reactive hydrocarbons, primarily acetylene, and reacting methane and the reactive hydrocarbons in the p... | 10/10/2000 |
| 6127583 | Process for preparing acetylene derivative from a ketone compound A preparation process of an acetylene derivative comprising reacting a compound having a skeleton represented by the formula (1): ##STR1## in the molecular formula with a compound represented by the formula (2): ##STR2## wherein R1, R... | 10/03/2000 |
| 6072094 | Efficient synthesis of cyclopropylacetylene An efficient and facile process for the preparation of cyclopropylacetylene from thioanisole and cyclopropyl substituted ketones or aldehydes is disclosed.... | 06/06/2000 |
| 6049019 | Process for the preparation of cyclopropylacetylene The present invention relates generally to novel methods for the synthesis of cyclopropylacetylene which is an essential reagent in the asymmetric synthesis of (S)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-ben zoxazin-2-one; a... | 04/11/2000 |
| 6042799 | Coproduction of acetylene and hydrocyanic acid from acrylonitrile In the process for preparing acetylene and hydrocyanic acid by pyrolyzing acrylonitrile in a reactor, the gaseous reaction products of the pyrolysis are quenched down to less than 100° C. immediately, advantageously within seconds, preferably within ࣘ1... | 03/28/2000 |
| 6028237 | Synthesis of cyclopropylacetylene The present invention relates generally to novel methods for the synthesis of cyclopropylacetylene which is a reagent in the asymmetric synthesis of (S)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-ben zoxazin-2-one which is a useful ... | 02/22/2000 |
| 6002062 | Process for the preparation of ethynylcyclopropane Ethynylcyclopropane is prepared from (1,1-dimethoxyethyl)cyclopropane by a two-stage elimination of methanol. Ethynylcyclopropane is an intermediate in the synthesis of pharmaceutically active ingredients, for example, antiviral agents.... | 12/14/1999 |
| 5990368 | Isomerization of allenes to alkynes with an alkaline-earth metal hydride containing catalyst Providing an isomerization process which can isomerize allenes to alkynes less expensively and stably is an assignment to be solved by the present invention and given thereto. The present invention is an isomerization process including the step of reactin... | 11/23/1999 |
| 5973092 | Cyclopentadiene derivatives for carbon-carbon composites A thermosetting resin is formed from cyclopentadiene and a propargyl halide. The resin can be used with carbon fibers to form a carbon-carbon composite.... | 10/26/1999 |
| 5952537 | Preparation of cycloalkylacetylene compounds using dialkylaminomagnesium halide or bis(dialkylamino)magnesium The process of invention reacts an alkynyl halide with a mixture that includes a dialkylaminomagnesium halide or a bis(dialkylamino)magnesium compound to produce a cycloalkylacetylene compound. Preferably, the dialkylaminomagnesium halide compound is of t... | 09/14/1999 |
| 5948945 | Prevention of spontaneous decomposition of gaseous acetylene A process for vinylation of an organic acidic-hydrogen compound, which entails reacting an organic acidic-hydrogen compound with acetylene or an acetylene-containing gas under elevated pressure and at elevated temperature in the presence of a base, wherei... | 09/07/1999 |
| 5942652 | Ethane pyrolysis The invention relates to the process for preparing ethyne by the pyrolysis of ethane by heating the same for a period of time that is less than 0.5 sec in a pyrolysis reactor at a temperature in the range of 950 to 1500° C., using steam as diluent gas in... | 08/24/1999 |
| 5879585 | Liquid crystalline compound having alkynyl group, and liquid crystal compositions and liquid crystal display device therefrom A liquid crystalline compound having a remarkably high Ɗn and good miscibility with other liquid crystalline compounds, and expressed by the general formula (1) ##STR1## wherein R1 represents, for example, a halogen atom, cyano group, or ... | 03/09/1999 |
| 5789644 | Preparation of acetylene and synthesis gas In the preparation of acetylene and synthesis gas by partial oxidation of hydrocarbons with oxygen, the feedstock gases are first separately preheated, then intensively mixed in a mixing zone, reacted after flowing through a burner block and then rapidly ... | 08/04/1998 |
| 5744666 | Process for preparing an alkynyl fulvene group containing compound and said compound A process for preparing an alkynyl fulvene group containing compound and said compound is provided. Said process comprises reacting an alkynyl ketone compound with a cyclopentadienyl-type compound.... | 04/28/1998 |
| 5728908 | Process for preparing a bridged ligand and said bridged ligand A process for preparing a bridged ligand, where said bridged ligand has an alkynyl group, and said bridged ligand is provided. Said process comprises reacting an alkynyl fulvene containing compound with an alkali metal salt of a cyclopentadienyl-type comp... | 03/17/1998 |
| 5663467 | Synthesis of cyclopropylacetylene An improved synthesis of cyclopropylacetylene involving cyclization of 5-halo-1-pentyne in strong base is disclosed, and is useful for preparing compounds with a cyclopropylethynyl substituent, such as an intermediate for a highly potent HIV reverse trans... | 09/02/1997 |
| 5436361 | Process for synthesizing enediynes A process for synthesizing enediynes is provided. Specifically, the formed enediynes contain a hex-3-ene-1,5-diynyl group. Production of the enediynes involves adding a base to a propargylic halide in the presence of a chelating agent, which causes a carb... | 07/25/1995 |
| 5185454 | Process for the preparation of symmetrical diarylacetylenes Symmetrical diaryl-acetylenes can be prepared by reacting an aryl halide with acetylene in the presence of a palladium catalyst and a base. If the acetylene is introduced into the liquid reaction mixture using a high intensity gas dispersion means, the ar... | 02/09/1993 |
| 5162596 | Z-12-heptadecen-1-yne Disclosed is a novel ene-yne compound Z-12-heptadecen-1-yne expressed by the structural formula CH3 (CH2)3 CH.sup.(Z) =CH(CH2)9 C=CH, which is useful as an intermediate in the synthetic preparation of... | 11/10/1992 |
| 5082961 | Method for the preparation of an alkynyl compound A novel and efficient method is proposed for the synthetic preparation of a long-chain alkynyl compound in a one-pot reaction without isolating the intermediate from the reaction mixture. The inventive method comprises the steps of: (a) a Grignard couplin... | 01/21/1992 |
