Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7652180 | Process for preparing alkyl chlorides The invention relates to a process for preparing alkyl chlorides by reacting alcohols with gaseous hydrogen chloride in the presence of a catalyst, wherein the catalyst comprises at least one compound of the structure: wher... | 01/26/2010 |
| 7304192 | Method for producing chlorinated hydrocarbon having chlorinated tertiary carbon The present invention relates to a simple method for efficiently producing aromatic-substituted chlorinated hydrocarbons, for example, high-purity cumyl chloride (1,4-bis(1-chloro-1-methylethyl)benzene, p-DCC) that can be used as an initiator for cationic polymeriza... | 12/04/2007 |
| 7217849 | Method for the preparation of n-propyl bromide A method is described for producing n-propyl bromide of a high degree of purity, which contains isopropyl bromide in an amount lower than 0.1% w/w, and usually lower than 0.05%. The method is characterized in that n-propanol is reacted with HBr which is in gas form,... | 05/15/2007 |
| 6992038 | Zinc chloride-loaded support and method for producing the same The present invention is to solve the problems caused by a conventional method for producing a zinc chloride-loaded support wherein zinc chloride is adsorbed on a solid support in an aqueous solution of zinc chloride. The problems include environmental destruction c... | 01/31/2006 |
| 6989175 | Acyl fluoride activation of carboxysilyl-coated glass substrates A method for the acyl fluoride activation of a carboxysilyl-coated glass is described. The method includes providing a glass substrate having a surface with at least one pendant carboxysilyl linker comprising a carboxyl group and activating without etching the surfa... | 01/24/2006 |
| 6414204 | Process for producing allyl chloride In a process for production of allyl chloride whereby allyl alcohol and hydrogen chloride are reacted in the presence of a catalyst and the resulting allyl chloride is distilled off from the reaction system, the by-production of diallyl ether is suppresse... | 07/02/2002 |
| 6326519 | Diallylic sulfides and processes for preparing the same Diallylic sulfides represented by Formula I ##STR1## wherein: R1 and R2 are independently chosen from the group consisting of --CHO, --CH2 Cl, --CH2 Br, --CH2 I, --CH2 OH, CH2 OS... | 12/04/2001 |
| 6206819 | Halogenation catalyst N,N-disubstituted formamides, wherein the substituents are selected to provide formamides which have low volatility, are useful as halogenation catalysts. Such catalysts are generally less hazardous to use than typical formamide halogenation catalysts bec... | 03/27/2001 |
| 6111153 | Process for manufacturing methyl chloride A process for manufacturing methyl chloride. The process consists essentially of contacting hydrogen chloride with at least a stoichiometric amount of methanol split into at least two portions with a first portion comprising about 60 to 95 percent of the ... | 08/29/2000 |
| 6077981 | Process for the production of cyclopropylmethyl halides Disclosed is a process for the production of cyclopropylmethyl halides (CPMX) such as cyclopropylmethyl chloride (CPMCl) and cyclopropylmethyl bromide (CPMBr) wherein cyclopropanemethanol (CPMO) is contacted with an aqueous solution of a hydrogen halide (... | 06/20/2000 |
| 5917099 | Preparation of methyl chloride Methyl chloride is prepared by effecting liquid-phase reaction between hydrogen chloride and methanol in the absence of a catalyst. The reaction is effected in divided stages including at least an early stage and a last stage. The early stage of reaction ... | 06/29/1999 |
| 5910617 | Process for the preparation of aliphatic or cycloaliphatic chlorides The process according to the invention consists in preparing chlorides of aliphatic or cycloaliphatic hydrocarbons by reacting the corresponding mono- or polyalcohol with phosgene or thionyl chloride in the presence of at least one catalyst chosen from he... | 06/08/1999 |
| 5859070 | Catalytic process Synthesis of small quantities of compounds such as methanol from reagents, especially radio-labelled reagents such as 11 C oxides, in a carrier gas by a catalytic reaction using a catalyst that has been pre-conditioned for the reaction by previ... | 01/12/1999 |
| 5856597 | Preparation of lucas reagent of enhanced utility and its use in synthesis of cycloaliphatic chlorides Gaseous anhydrous hydrogen chloride is introduced into an aqueous solution of zinc chloride under conditions effective to produce a more efficient Lucas reagent than a Lucas reagent made by mixing solid, anhydrous zinc chloride with 38% hydrochloric acid.... | 01/05/1999 |
| 5767330 | Process for preparing alkyl chlorides The preparation of long-chain alkyl chlorides from alcohols and hydrogen chloride is improved by carrying out the reaction at a temperature below the boiling point of the alkyl chloride, and distilling off the resulting alkyl chloride by feeding in additi... | 06/16/1998 |
| 5763712 | Process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane with methanol as extractant This invention relates to a process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane by extractive distillation with methanol as extractant. The mixture is prepared by reacting methanol with hydrogen chloride. The mix... | 06/09/1998 |
| 5723704 | Process for the preparation of alkyl chlorides Process for the preparation of alkyl chlorides, characterized in that: a) in a first stage a primary mono- or polyhydric alcohol, which has a C4 -C30 carbon chain which is saturated, substituted or otherwise by one or more chlorine atoms ... | 03/03/1998 |
| 5637781 | Process for the alcoholysis of carbon tetrachloride The invention relates to a process for the alcoholysis of carbon tetrachloride which consists in simultaneously sending, on the one hand, carbon tetrachloride and, on the other hand, an alcohol ROH, over a catalytic composition, characterized in that the ... | 06/10/1997 |
| 5436378 | Drying of hydrocarbon/hydrochloric acid/water admixtures Water-containing mixtures of at least one hydrocarbon/halocarbon and hydrochloric acid, e.g., the methyl chloride feedstream in conventional process for the synthesis of chloromethanes, are desiccated by intimately contacting such mixtures with an effecti... | 07/25/1995 |
| 5384415 | Process for the preparation of brominated compounds, especially from alcohols A process for the preparation of a brominated compound which comprises the step of reacting at least one compound selected from the group consisting of a chloroformate, a chlorosulfite and a chlorophosphite with a brominating agent for a time sufficient t... | 01/24/1995 |
| 5321171 | Method for producing methyl chloride A method for producing methyl chloride, which comprises reacting methanol and hydrogen chloride in a gas phase in the presence of a catalyst, wherein a zirconium oxide catalyst or a composite catalyst comprising at least two oxides of metals selected from... | 06/14/1994 |
| 5241086 | Process for the preparation of brominated compounds, especially from alcohols A process for the preparation of a brominated compound which comprises the step of reacting at least one compound selected from the group consisting of a chloroformate, a chlorosulfite and a chlorophosphite with a brominating agent for a time sufficient t... | 08/31/1993 |
| 5227550 | Method for preparation of methyl chloride Carbon tetrachloride, which is a material of low value and may be banned due to the problem of the destructiveness against the stratospheric ozone layer, can be efficiently utilized in the preparation of more useful methyl chloride by a catalytic vapor-ph... | 07/13/1993 |
| 5202512 | Process for the preparation of halogenoalkanes Process for the preparation of methyl chloride, which comprises reacting methanol with hydrogen chloride in a concentration below the particular ageotropic concentration in the liquid phase in the presence of an amine hydrohalide.... | 04/13/1993 |
| 5196618 | Method for the preparation of methyl chloride from carbon tetrachloride and methyl alcohol An improvement is proposed in the method for the preparation of methyl chloride from carbon tetrachloride and methyl alcohol by the reaction including the partial reactions of, first, the hydrolysis reaction of carbon tetrachloride with water to form hydr... | 03/23/1993 |
| 5138110 | Process for the preparation of alkyl-halides A process for preparing lower alkyl-halides from the reaction of HX and the corresponding lower alcohol, wherein X represents a halogen atom, comprises continuously feeding HX and a lower alcohol to a reactor maintaining the instantaneous molar ratio of H... | 08/11/1992 |
| 5132476 | Process for producing C3 -C4 monoalkylchlorides The vaporous reaction product from the continuous reaction of C3 -C4 monoalkanols with hydrogen chloride is removed, condensed, and split into a light organic phase and a heavy aqueous phase. The heavy aqueous phase is immediately di... | 07/21/1992 |
| 5109138 | Process and catalyst for hydrohalogenation of hydrocarbons A process for hydrohalogenating methanol with a hydrogen halide using a catalyst having an initial zone of lower activity and subsequent zones of higher activity so that coke formation and pressure drop are decreased and catalyst life is increased while o... | 04/28/1992 |
| 4935565 | Process and catalyst for hydrochlorination of hydrocarbons Methyl chloride is produced by contacting methanol and hydrogen chloride in the vapor phase in the presence of KZnCl3 supported on silica. The process produces methyl chloride in good yield with minimal formation of dimethyl ether as a by-produ... | 06/19/1990 |
| 4935564 | Process for preparing alkyl halides A process for preparation of an alkyl halide, RX, from reaction between the corresponding alcohol, ROH, and a hydrogen halide, HX, which improves conversion of the hydrogen halide to the alkyl halide in a single pass through a reactor. The process compris... | 06/19/1990 |
| 4922043 | Manufacture of methyl chloride by hydrochlorinating methanol, using a split methanol feed In a process for making methyl chloride by the catalytic hydrochlorination of methanol in the liquid phase, the common formation of unwanted dimethyl ether by-product is reduced by conducting the process in at least two reactors operating in series and by... | 05/01/1990 |
| 4808761 | Demethanolization of aqueous CH3 OH/HCl solutions Residual aqueous phases, emanating from the synthesis of methyl chloride by reacting methanol with hydrochloric acid, are conveniently demethanolized by maintaining same in liquid phase and in the absence of catalyst, at a temperature of from 50° to 150Â... | 02/28/1989 |
| 4794204 | Process for the removal of dimethyl ether in methyl chloride A process is described for the removal of dimethyl ether in methyl chloride by catalytic cleavage by means of hydrogen chloride. Dimethyl ether is present as an impurity in crude methyl chloride produced by the catalytic esterification of methanol. The cr... | 12/27/1988 |
| 4465880 | Process for the manufacture of methyl chloride Methyl chloride is manufactured from methanol and hydrogen chloride in the gaseous phase in the presence of an aluminum oxide catalyst. The reaction is carried out in the presence of from 1 to 80 liters of oxygen per kg of methanol.... | 08/14/1984 |
| 4351972 | Process for making anhydrous alkyl iodides The invention relates to the production of anhydrous alkyl iodides. To this end, carboxylic acid alkyl esters of the formula R1 COOR2, in which R1 stands for hydrogen or an alkyl or aryl radical having from 1 to 8 carbon a... | 09/28/1982 |
| 4220609 | Process for the recovery of alkyl chlorides Crude gaseous C1 -C3 alkyl chlorides, prepared by reacting the corresponding alcohol with hydrogen chloride, are freed from by-product water, unreacted hydrogen chloride and unreacted alcohol by feeding the super-heated gaseous strea... | 09/02/1980 |
| 4073816 | Process for the continuous production of monochloroalkanes Monochloroalkanes are produced by reacting the corresponding alcohol with hydrogen chloride in the presence of a solution of zinc chloride. The mixture of alcohol and zinc chloride solution is saturated with gaseous hydrogen chloride and this mixture in a... | 02/14/1978 |
| 3983180 | Process for preparing methyl chloride A process for preparing methyl chloride by reacting hydrogen chloride with methanol in the liquid-phase non-catalytic reaction, employing a reaction system comprising a reactor and two distillation columns, each being operated under a different pressure, ... | 09/28/1976 |
| 3981438 | Centrifuge rotor having swinging members with variable pivot points A centrifuge rotor has a plurality of swinging buckets or bucket carriers disposed on its periphery. Mounting pins, having an oblong cross-section, for the buckets are secured to the rotor itself. These pins are pivotally engaged with enlarged holes in th... | 09/21/1976 |
| 3981938 | Method for producing dry alkyl halides A method for producing alkyl halides by reacting the corresponding alkanol with at least 10% molar excess of hydrogen halide at a temperature of at least 50°C. and under sufficient pressure to maintain the reactants dissolved in the liquid water of react... | 09/21/1976 |
