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"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 8071826 | Process for the preparation of 2,3,3,3-tetrafluoropropene (HFO-1234yf) A process for the preparation of 2,3,3,3-tetrafluoropropene (HFO-1234yf). HFO-1234yf is a refrigerant with low global warming potential. A process comprises a) reacting chlorotrifluoroethylene with a methyl halide to form an intermediate product stream; and b) react... | 12/06/2011 |
| 7312288 | Polymerizable fluorinated ester compounds and their preparing processes Polymerizable fluorinated ester compounds having formulae (1) and (2) are novel wherein R1 is H, methyl or trifluoromethyl, R2 and R3 are H or a monovalent hydrocarbon group, R2 and R3 may form a ring, R4 | 12/25/2007 |
| 7288614 | Substituted cycloalkanes, and use thereof as cationic polymerization initiators Substituted 7- to 12-membered cycloalkanes which have leaving groups, in particular chlorine atoms, on tertiary ring carbons, a process for preparing them and their use as initiators for cationic polymerization, in particular the cationic polymerization of isobutene... | 10/30/2007 |
| 7074464 | Perfluoropropenyl-containing compound, liquid crystal composition and liquid crystal display element A compound represented by the formula (1). wherein Ra is alkyl having 1 to 10 carbon(s) and, in that alkyl, any of —CH2— may be replaced with —O—, —S—, —CO—, —CH═CH— or —C≡C... | 07/11/2006 |
| 7001966 | Method for the production of isobutene polymers The present invention relates to a process for preparing an isobutene polymer using a cyclopentene derivative as initiator and to the isobutene polymer obtainable by means of the process and to particular functionalization products thereof. ... | 02/21/2006 |
| 6403846 | Fluorinated, saturated hydrocarbons A composition containing less than 95 mol % of a trihydrofluorinated saturated hydrocarbon represented by the following formula (I) Rf1 --R1 --Rf2 (I) (wherein R1 represents a carbon chain in which CHF and CH2... | 06/11/2002 |
| 6388151 | Synthesis of Tetraalkylcyclopentadienes A method for synthesizing tetramethylcyclopentadiene from 2,3-dibromobutane is described. A 2-bromo-2-butene Grignard is reacted with an ethyl formate to produce a 3,5-dimethyl-2,5-heptadiene-4-ol magnesium bromide which is then quenched with acetic acid ... | 05/14/2002 |
| 6063971 | Process for the preparation of halogenomethylcyclopropanes and ultrapure halogenomethylcyclopropane A process for producing a compound of the formula (I) ##STR1## wherein Hal is chlorine or bromine, and R1 to R5 are, each independently, hydrogen, unsubstituted or substituted C1 -C10 -alkyl, or unsubstitut... | 05/16/2000 |
| 5955627 | Process for the preparation of cyclopropylacetylene derivatives According to the present invention, a process for the preparation of a cyclopropylacetylene derivative represented by the following formula (III): ##STR1## is provided, which comprises reacting a cyclopropylacrylic acid derivative represented by... | 09/21/1999 |
| 5734061 | Process for preparing spirocyclic lactams The invention is directed to an improved process for the preparation of spirocyclic lactams which utilizes diiodides in the spiro alkylation of lactams N-substituted with a tertiary amine group. The resultant spirocyclic lactams are useful in the producti... | 03/31/1998 |
| 5593619 | Granulated flame retardant products This invention relates to compositions containing improved granulated hexabromocyclododecane flame retardant products, flame retardant formulations containing products, and to a process for forming the improved granulated flame retardant products, wherein... | 01/14/1997 |
| 5498734 | Preparation and use of (2-butene-1,4-diyl)magnesium complexes in organic synthesis The magnesium complexes of cyclic hydrocarbons containing conjugated dienes, such as 1,2-dimethylenecycloalkanes, and 1,3-butadienes, are readily prepared in high yields using highly reactive magnesium. Reactions of these (2-butene-1,4 diyl)magnesium reag... | 03/12/1996 |
| 5384065 | Matrix liquid-crystal display The invention relates to a matrix liquid-crystal display based on the principle of electrically controlled birefringence, having two plane-parallel outer plates, which, together with a frame, form a cell, integrated nonlinear elements for switching individual pixel... | 01/24/1995 |
| 5356560 | 2-fluoroperfluoroalkylcyclohexene derivatives 2-Fluoroperfluoroalkylcyclohexene derivatives of the formula I ##STR1## where R is an alkyl or alkenyl radical having up to 18 carbon atoms which is unsubstituted or substituted by CN or by at least one halogen and in which one or more non-adjacent C... | 10/18/1994 |
| 5288932 | Method for the production of substituted or unsubstituted chloromethyl cyclopropane and bromomethyl cyclopropane The present invention relates to a method for the production of substituted or unsubstituted chloromethyl and bromomethyl cyclopropane having a degree of purity above 85%, particularly above 90%, by reacting a hydroxymethyl cyclopropane of the formula ... | 02/22/1994 |
| 5246601 | Centrifugation process for separating polyhalogenated product from product centrate This invention relates to an improvement in a process for centrifuging a polyhalogenated product, the improvement comprising enhancing the porosity of a centrifuge filter cloth subsequent to one or more centrifugation cycles by effectively treating the ce... | 09/21/1993 |
| 5231205 | Preparation and use of (2-butene-1,4-diyl)magnesium complexes in organic synthesis The magnesium complexes of cyclic hydrocarbons, such as 1,2-dimethylenecycloalkanes, are readily prepared in high yields using highly reactive magnesium. Reactions of these (2-butene-1,4-diyl)magnesium reagents with electrophiles such as dibromoalkanes, a... | 07/27/1993 |
| 5177272 | Process for preparing perhalogenated olefins The invention relates to a process for preparing perhalogenated olefins which comprises reacting a perhalogenated alkane, having at least one atom of a halogen different from fluorine, with a tris-dialkylamino phosphine at temperature not higher than 60°... | 01/05/1993 |
| 5157174 | Ternary molybdenum chalcogenide oxychlorination catalysts Hydrocarbons are oxychlorinated by reaction with gaseous HCl and an oxygen-containing gas, in the presence of a catalytically effective amount of a ternary copper/molybdenum chalcogenide having the formula: Cux Mo6 Ch8 wherein ... | 10/20/1992 |
| 5077444 | Process for drying hexabromocyclododecane A flame retardant product predominant in hexabromocyclododecane is prepared and dried by a process wherein gaseous ammonia is injected into the dryer system to prevent the formation of color bodies which contaminant the product.... | 12/31/1991 |
| 5043492 | Method for producing hexabromocyclododecane A process for obtaining an improved yield of hexabromocyclododecane by utilizing a solvent in the reaction mass containing a minor amount of water.... | 08/27/1991 |
| 5004847 | Recovery of hexabromocyclododecane particles Methods for purifying and agglomerating hexabromocyclododecane particles by heating an admixture formed with wetcake and water.... | 04/02/1991 |
| 4814524 | Method for converting organic chloroformate to the corresponding organic chloride Organic haloformate, e.g., chloroformate, compounds are converted to their corresponding halides, e.g., chlorides, by heating the haloformate, e.g., between 90° C. and 150° C., in the presence of a catalytic amount of an organic quaternary salt, e.g., q... | 03/21/1989 |
| 4792618 | Fluorinated carbocylic compounds Fluoro-substituted carbocyclic compounds are prepared by (A) reacting hydrogen fluoride with a chloro-cyclohexenyl compound of the formula ##STR1## where R1 and R2 are independently selected from the group consisting of --H, --... | 12/20/1988 |
| 4783563 | Preparation of hexabromocyclododecane Hexabromocyclododecane may be synthesized at a high yield in pure form by brominating 1,5,9-cyclododecatriene with bromine in a C4 -C8 saturated aliphatic alcohol in the presence of a boron trifluoride complex, neutralizing the react... | 11/08/1988 |
| 4720591 | Preparation of chloro-olefins Chloro-olefins which contain a group of the formula ##STR1## where Y is chlorine or hydrogen, which are prepared by a process in which a trichloromethyl compound which contains a group of the general formula ##STR2## where X is hydrogen or an or... | 01/19/1988 |
| 4714785 | Method for converting organic chloroformate to the corresponding organic chloride Organic haloformate, e.g., chloroformate, compounds are converted to their corresponding halides, e.g., chlorides, by heating the haloformate, e.g., between 90° C. and 150° C., in the presence of a catalytic amount of a carbon catalyst for a time suffic... | 12/22/1987 |
| 4694104 | Phase transfer catalysts The invention relates to polyoxyalkylene quaternized salts as phase transfer catalysts for liquid/liquid phase cyclopropanation, substitution or addition reactions involving a normally liquid or solvent soluble olefinically unsaturated hydrocarbon and the... | 09/15/1987 |
| 4686310 | 2-isopropenyl-5-methylcyclopentanealkanols derivatives and organoleptic uses or same Described are the 2-isopropenyl-5-methylcyclopentanealkanols and esters thereof having the generic structure: ##STR1## wherein R1 represents hydrogen or C2 -C3 acyl and wherein n represents 0 or 1 and uses thereof in ... | 08/11/1987 |
| 4665247 | Diels-Alder cyclization over copper-containing ZSM-12 The present invention provides a process which is adapted for cyclodimerization of 1,3-butadiene to 4-vinylcyclohexene-1 under Diels-Alder conditions in the presence of a copper-containing ZSM-12.... | 05/12/1987 |
| 4627933 | Liquid crystalline phases containing alkylene-type bridges Compounds of the formula wherein R1 and R2 are each independently alkyl or alkoxy each of 1-12 C atoms, F, Cl, Br, CN or --Q3 --R3, or one of R1 and R2 can also be H; Q1, Q2 | 12/09/1986 |
| 4622334 | Combating fungi with 3-cycloalkyl-1-(1,3-dioxan-5-yl)2-(1,2,4-triazol-1-yl)-propan-1-ones and propan-1-ols Combating fungi with a 3-cycloalkyl-1-(1,3-dioxan-5-yl)-2-(1,2,4-triazol-1-yl)-propan-1-one or -propan-1-ol of the formula ##STR1## in which R1 is optionally substituted cycloalkyl, R2 is hydrogen or alkyl, R3 is hydr... | 11/11/1986 |
| 4571438 | Process for preparing olefinic aldehydes and chemical intermediates A process for the preparation of olefinic aldehydes and intermediates is disclosed. The condensation of an ,ω-dihalide with a metal acetylide gives an acetylenic halide which can be reduced to give an olefinic halide, then oxidized to give the des... | 02/18/1986 |
| 4551264 | Polyhalogenoaromatic compounds for liquid crystal compositions New polyhalogenoaromatic compounds of Formula I ##STR1## wherein Y and Z are each independently alkyl, alkoxy or alkanoyl each of 1 to 12 C atoms, --COOR1, --O--CO--R1, CN, NO2, NH2 or OH; Q is one or two i... | 11/05/1985 |
| 4540826 | Process for preparing olefinic aldehydes A process for the preparation of olefinic aldehydes and intermediates is disclosed. The condensation of an ,ω-dihalide with a metal acetylide gives an acetylenic halide which can be reduced to give an olefinic halide, then oxidized to give the des... | 09/10/1985 |
| 4272456 | Derivatives of 8-dehydro-vitamin A and their preparation New derivatives of 8-dehydro-vitamin A obtained by vinylating or ethynylating and subsequently partially hydrogenating, 1-[3-methyl-octa-1-yne,3,5,-dien-7-on-1-yl]-2,6-dimethyl-cyclohex-1-ene or its 5- and/or 6-methyl derivatives, converting the resulting... | 06/09/1981 |
| 4233251 | Process for preparing hexachlorocyclopentadiene There is disclosed a process for the production of hexachlorocyclopentadiene comprising the steps of: (a) reacting liquid cyclopentadiene and chlorine at a temperature of from about 0 to about 100 degrees centigrade until a minimum of four chlorine atoms ... | 11/11/1980 |
| 4214098 | Unsaturated alcohols and esters Novel cyclooctene derivatives of the formula: ##STR1## in which R1 and R2 each represents an alkyl group and R3 is hydrogen or an acyl group are disclosed along with their use as aroma chemicals and/or aroma chemical ... | 07/22/1980 |
| 4038330 | 1-Methyl-2-halogenomethyl-3-isopropenyl-cyclopent-1-enes Cyclopentene derivatives of the general formula ##STR1## where Hal is chlorine, bromine or iodine.... | 07/26/1977 |
| 4020112 | Oxidative fluorination of phenols Phenols are oxidatively fluorinated by reaction with sulfur tetrafluoride in hydrogen fluoride solution at about 0° to 250° C. to form products which are useful as solvents and/or plasticizers for polymers. The novel products of this process include ... | 04/26/1977 |
