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| Number | Title | Issue Date |
| 7348459 | Process for the preparation of 3,3-dimethylbutanal 3,3-Dimethylbutanal is prepared from 3,3-dimethybutanol. Intermediate 3,3-dimethylbutanol is obtained by reacting ethylene, isopropylene and a mineral acid to produce a 3,3-dimethylbutyl ester which is hydrolyzed to the alcohol. The hydrolysis step is effectively ca... | 03/25/2008 |
| 7071363 | Structured catalyst bed The invention relates to a novel structured catalyst bed which optionally comprises at least one part bed comprising at least one catalytically active mixture of oxides of the main group metals and transition metals and additionally comprises at least one catalytica... | 07/04/2006 |
| 7053524 | Surface acoustic wave sensor or identification device with biosensing capability A surface acoustic wave sensor or identification device has a piezoelectric material, and an interdigitated transducer (IDT) input/output mounted on the piezoelectric material for receiving a radio frequency (RF) signal and propagating a corresponding surface acoust... | 05/30/2006 |
| 6909019 | Process for preparing aldehydes A process is disclosed for preparing aldehydes by isomerization of the corresponding unsaturated primary alcohols using a transition metal catalyst system, in an alcoholic solvent and in the presence of an acid. An aldehyde forms by isomerizing an unsaturated primar... | 06/21/2005 |
| 6573409 | Process for the preparation of 3,3-dimethylbutanal 3,3-Dimethylbutanal is prepared from 3,3-dimethylbutanol. Intermediate 3,3-dimethylbutanol is obtained by reacting ethylene, isopropylene and sulfuric acid to produce a 3,3-dimethylbutyl ester which is hydrolyzed to the alcohol. The hvdrolysis step is eff... | 06/03/2003 |
| 6403839 | Process for making butyraldehyde from butadiene Process for making butyraldehyde from an n-butenyl ester of a carboxylic acid, wherein the n-butenyl ester is hydrolyzed to form the corresponding n-butenyl alcohol n-butenyl alcohol so produced is isomerized to form butyraldehyde.... | 06/11/2002 |
| 6329555 | Preparation of substituted butenes Described is a process for preparing substituted butenes of the formula I and/or II, ##STR1## where the radical R is unsubstituted or mono- or di-C1 -C10 -alkoxy-substituted or mono- or dihydroxy-substituted C2 -C20 | 12/11/2001 |
| 6278031 | Catalyst and process for preparing 2-buten-1-ol compounds The fixed-bed catalyst comprises palladium and selenium or tellurium or a mixture of selenium and tellurium on a silicon dioxide support and has a BET surface area of from 80 to 380 m2 /g and a pore volume of from 0.6 to 0.95 cm3 /g ... | 08/21/2001 |
| 6239324 | Diene compound and process for producing the same The invention provides a chain diene compound with desirable regioselectivity, in the presence of a specific ruthenium compound. This chain diene compound is a promising raw material for terpene. It has a structure represented by the general formula (IX):... | 05/29/2001 |
| 6198006 | Process for the manufacture of citral A process for the manufacture of citral is provided by the catalyzed rearrangement of dehydrolinalool to citral. The rearrangement is carried out in the presence of a molybdenum compound of the general formula MoO2 X2 wherein X signi... | 03/06/2001 |
| 6191313 | Process for the manufacture of dihydrocitral A process for the manufacture of dihydrocitral, a valuable intermediate, through the catalyzed rearrangement of dihydrodehydrolinalool by carrying out the rearrangement in the presence of a molybdenum compound of the general formula MoO2 X... | 02/20/2001 |
| 6166265 | Processes for the preparation of n-butyraldehyde, n-butanol and mixtures thereof Process for the preparation of n-butyraldehyde and/or n-butanol, wherein a) 1,3-Butadiene or a butadiene-containing hydrocarbon mixture is reacted with an alcohol of the formula I ROH I, where R is C2 | 12/26/2000 |
| 6118027 | Preparation of unsaturated aldehydes from propargyl alcohol and conjugated diolefins Unsaturated aldehydes are prepared by mixing propargyl alcohol, a catalyst and a conjugated diolefin and heating the mixture for a time and at a temperature sufficient to form an unsaturated aldehyde. The diolefin may be 2-methylpentadiene, 2(5,5 dimethyl... | 09/12/2000 |
| 6013843 | Continuous industrial production of unsaturated aliphatic aldehydes in a tube bundle reactor A process for continuous industrial production of unsaturated aliphatic aldehydes having a boiling range from 95 to 136° C. by oxidative dehydrogenation of the corresponding alcohols with an oxygen-comprising gas over a supported catalyst consisting of c... | 01/11/2000 |
| 5994590 | Process for producing 7-octen-1-al A process for producing 7-octen-1-al by isomerization of 2,7.octadien-1-ol by feeding 2,7-octadien-1-ol and hydrogen to a reaction zone in the presence of a copper catalyst while controlling the molar ratio of 2,7-octadien-1-ol to hydrogen within a range ... | 11/30/1999 |
| 5905175 | Synthesis and purification of 3,3-dimethylbutyraldehyde via oxidation of 1-chloro-3,3-dimethylbutane with dimethyl sulfoxide 1-chloro-3,3-dimethylbutane is oxidized by dimethyl sulfoxide, in the presence of an effective amount of inorganic bromide or iodide, and in the present of an effective amount of base, to produce 3,3-dimethylbutyraldehyde.... | 05/18/1999 |
| 5892125 | Preparation of n-butyraldehyde and/or n-butanol A process for the preparation of n-butyraldehyde and/or n-butanol, in which a) 1,3-butadiene is caused to react with an amine of the formula I R1 R2 NH, I in which R1 and R2 independentl... | 04/06/1999 |
| 5856584 | Preparation of 3,3-dimethylbutyraldehyde by oxidation of 3, 3-dimethylbutanol This invention provides a method for preparing 3,3-dimethylbutyraldehyde from 3,3-dimethylbutanol using an oxidizing component. In one embodiment, 3,3-dimethylbutanol is oxidized to 3,3-dimethylbutyraldehyde in the vapor phase by contacting it with an oxi... | 01/05/1999 |
| 5770775 | Method for preparing 3,3-dimethylbutyraldehyde A method is disclosed for preparing 3,3-dimethylbutyraldehyde by isomerization of 3,3-dimethylepoxybutane with a basic lithium salt which in turn may be prepared by oxidation of dimethylbutane. The method provides an economical means of preparing 3,3-dime... | 06/23/1998 |
| 5705707 | Preparation of n-butyraldehyde and/or n-butanol A process for the preparation of n-butyraldehyde and/or n-butanol, wherein a) 1,3-butadiene is caused to react with an alcohol of the formula I ROH I, to form a mixture of adducts of the formulas II ##STR1## ... | 01/06/1998 |
| 5502257 | Process for the production of cyclopropanecarboxaldehyde Disclosed is a process for the preparation of cyclopropanecarboxaldehyde by the thermal isomerization of 2,3-dihydrofuran under superatmospheric pressure, e.g., at a temperature of about 300° to 600° C. and a pressure of about 3 to 345 bars absolute.... | 03/26/1996 |
| 5481044 | Process for the preparation of -alkyl substituted aldehydes -alkyl aldehydes having 8 to 17 carbon atoms are obtained from terminal olefins containing one less carbon atom. The olefins are first isomerized in the presence of iron carbonyl and then, without separating out the iron compound, hydroformylated i... | 01/02/1996 |
| 5312995 | Process for isomerizing epoxides to aldehydes A process for isomerizing epoxides to aldehydes is disclosed. The process uses a metal-exchanged zeolite catalyst wherein the zeolite contains an alkali metal and one or more second exchangeable metals from Group IIA, IB, IIB, or IIIB. The catalysts are e... | 05/17/1994 |
| 5077438 | Process for the preparation of acrolein A method of isomerizing propargyl alcohol to acrolein, wherein propargyl alcohol is rearranged in the gas phase at a temperature of from 300° to 550° C. and a pressure of from 0.01 to 50 bar and in contact with a heterogeneous catalyst containing alkali... | 12/31/1991 |
| 5012005 | Conversion of 1,3-dioxanes to 4-oxaaldehydes 4-oxaaldehydes of the formula ##STR1## are prepared by catalytic isomerization of 1,3-dioxanes by a process in which a 1,3-dioxane of the formula ##STR2## where R1, R2, R4 and R5 are identical or diffe... | 04/30/1991 |
| 4996365 | Preparation of alkyl-substituted cinnamaldehydes Alkyl-substituted cinnamaldehydes of the formula I ##STR1## where one or more of R1 , R2 and R3 is alkyl of from 1 to 8 carbon atoms, preferably of from 1 to 4 carbon atoms, and non-alkyl R1, R2 ... | 02/26/1991 |
| 4980511 | Preparation of aldehydes and/or ketones BU conversion of epoxides Aldehydes and ketones are prepared from epoxides of the formula ##STR1## where R1 and R2 are each alkyl, alkenyl, aryl, alkoxy or aralkyl and R3 has the same meanings or is hydrogen, by a catalytic rearrangement react... | 12/25/1990 |
| 4950797 | Preparation of carbonyl compounds by isomerization of allyl alcohols A process for the preparation of carbonyl compounds by catalyzed isomerization of allyl alcohols in a tertiary phosphine or phosphite ester in the presence of a rhodium compound at a temperature of from 80° C. to 180° C., a carrier gas being passed thro... | 08/21/1990 |
| 4939280 | Conversion of 1,3-dioxanes to 4-oxaaldehydes 4-Oxaaldehydes of the formula ##STR1## are prepared by catalytic isomerization of 1,3-dioxanes by a process in which a 1,3-dioxane of the formula ##STR2## where R1, R2, R4 and R5 are identical or diffe... | 07/03/1990 |
| 4925987 | Preparation of aldehydes from unsaturated terminal epoxides Crotoaldehyde is produced by contacting butadiene monoxide with a metal oxide, mixed metal oxide, or mixture of metal oxides. The process is preferably conducted in the vapor phase. Other unsaturated aldehydes can be prepared from other unsaturated termin... | 05/15/1990 |
| 4925986 | Preparation of aldehydes from unsaturated terminal epoxides Crotonaldehyde is produced by contacting 3,4-epoxybutene, i.e. butadiene monoxide, with a halide-containing catalyst such as a hydrogen halide or metal halide. The process is preferably conducted in the vapor phase. Other unsaturated aldehydes can be prod... | 05/15/1990 |
| 4749814 | Process for the preparation of ethylenic carbonyl compounds Ethylenic carbonyl compounds of formula ##STR1## are made by the isomerization of acetylenic alcohols of formula ##STR2## in the presence of a catalyst consisting of a titanium derivative, a copper or silver derivative, and, if required, an acid... | 06/07/1988 |
| 4709097 | Conversion of 1,3-dioxanes to 4-oxa-aldehydes 4-oxa-aldehydes are prepared by catalytic isomerization of a 1,3-dioxane using an acidic zeolite catalyst.... | 11/24/1987 |
| 4677230 | Preparation of 2-methyl-2-alkenals 2-Methyl-2-alkenals of the formula ##STR1## where R1 and R2 are each hydrogen, alkyl which may additionally carry aromatic radicals, or an aromatic radical, are prepared by isomerizing a 2-alkylacrolein of the formula ##STR... | 06/30/1987 |
| 4605779 | Method for the production of tiglic aldehyde A novel method for producing tiglic aldehyde from ethylacrolein by isomerization in the presence of a hydrogenating catalyst is disclosed. According to the invention, tiglic aldehyde can be prepared in a good yield.... | 08/12/1986 |
| 4599458 | Preparation of 2-methylalk-2-enals 2-Methylalk-2-enals of the formula ##STR1## where R1 and R2 are each hydrogen, alkyl or an aromatic radical, are prepared by isomerization of an acrolein derivative of the formula ##STR2## with a zeolite catalyst, an alumin... | 07/08/1986 |
| 4510331 | Processes for producing 7-octen-1-al and derivatives thereof There are disclosed a process for producing 7-octen-1-al which comprises isomerizing 2,7-octadien-1-ol in the presence of a catalyst comprising oxides of at least two metals selected from the group consisting of copper, chromium and zinc and processes for... | 04/09/1985 |
| 4463196 | Process for the preparation of citral Citral is prepared by heating dehydrolinalol in the presence of a vanadium compound as catalyst and an alkanol of 12 to 18 carbon atoms as co-catalyst, whereby isomerization is effected. There may also be present an alkanol or cycloalkanol of 7 to 11 carb... | 07/31/1984 |
| 4377708 | Hydrocarboxylation of vinyl alkanoates Vinyl esters such as vinyl acetate are hydrocarboxylated with tertiary organo-phosphine stabilized palladium catalysts utilizing low water concentration; the ready hydrolysis of the -acetoxypropionic acid affords a convenient route to lactic acid.... | 03/22/1983 |
| 4347387 | Process for preparing hydroxycitronellal A process as described for preparing hydroxycitronellal by isomerizing certain 7-hydroxygeranylamine compound or 7-hydroxynerylamine compounds using a catalyst comprising a divalent palladium compound and a phosphine compound.... | 08/31/1982 |
