Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7994368 | Direct and selective production of acetaldehyde from acetic acid utilizing a supported metal catalyst A process for the selective production of acetaldehyde by vapor phase reaction of acetic acid over a hydrogenating catalyst composition to form acetaldehyde is disclosed and claimed. In an embodiment of this invention reaction of acetic acid and hydrogen over platin... | 08/09/2011 |
| 7951978 | Process for producing acrolein and glycerin-containing composition The present invention provides a process for producing acrolein, which exhibits a prolonged catalyst life, low energy consumption, and excellent efficiency, and which is earth-conscious, and a glycerin-containing composition which can preferably be used even in this... | 05/31/2011 |
| 7816565 | Direct and selective production of acetaldehyde from acetic acid utilizing a supported metal catalyst A process for the selective production of acetaldehyde by vapor phase reaction of acetic acid over a hydrogenating catalyst composition to form acetaldehyde is disclosed and claimed. In an embodiment of this invention reaction of acetic acid and hydrogen over platin... | 10/19/2010 |
| 7491854 | Enzymatic method of making aldehydes from fatty acids The present invention provides methods of enzymatically preparing aldehydes from fatty acids by utilizing a carboxylic acid reductase enzyme to reduce the fatty acids to their corresponding aldehydes. The present invention also provides aldehydes prepared by the met... | 02/17/2009 |
| 7193116 | Method for producing aldehydes by means of hydroformylation of olefinically unsaturated compounds, said hydroformylation being catalyzed by unmodified metal complexes in the presence of cyclic carbonic acid esters The present invention relates to a process for preparing aldehydes by hydroformylation catalyzed by metals of groups 8 to 10 of the Periodic Table of the Elements in the presence of cyclic carbonic esters. ... | 03/20/2007 |
| 7112699 | Process for the direct conversion of lactones into unsaturated ketones or aldehydes The present invention refers to a process for the preparation of unsaturated ketones or aldehydes by pyrolysis of a lactone, in the presence of a reducing agent such as molecular hydrogen or a carboxylic acid, and in the presence of a catalyst, optionally supported,... | 09/26/2006 |
| 7030053 | Catalyst composition comprising ruthenium and a treated silica support component and processes therefor and therewith for preparing high molecular weight hydrocarbons such as polymethylene A catalyst composition and a process of using a catalyst composition for preparing high molecular weight hydrocarbons, such as polymethylene, from a fluid containing hydrogen and carbon monoxide are disclosed. The catalyst composition contains ruthenium and a treate... | 04/18/2006 |
| 7022220 | C-nitrosoaniline compounds and their blends as polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine o... | 04/04/2006 |
| 6984759 | Process for the preparation of perfluoropolyethers having aldehyde, alcohol, amine end groups by catalytic reduction Process for the perfluoropolyether preparation having reactive end groups —CH2NH2, —CHO, —CH2OH, by reduction of the corresponding perfluoropolyethers having —CN, —COCl, —CHO end groups by using gaseous hydrogen in the pr... | 01/10/2006 |
| 6933405 | User- and eco-friendly hypervalent iodine reagent and method of synthesis The present invention is a user- and eco-friendly hypervalent iodine reagent (mIBX) capable of selectively oxidizing allylic and benzylic alcohols in water and other eco-friendly solvents and having generally the following structure: | 08/23/2005 |
| 6902663 | C-nitrosoaniline compounds and their blends as polymerization inhibitors Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine o... | 06/07/2005 |
| 6770219 | Composition and method for preventing fouling in (meth)acrylic acid processes An antifoulant composition comprising (meth)acrylic acid and one or more (meth)acrylate or (meth)acrylamide antifoulant polymers and a method of preventing fouling in (meth)acrylic acid processes comprising adding the (meth)acrylate or (meth)acrylamide antifoulant p... | 08/03/2004 |
| 6610888 | Reaction of a solution comprising a mixture A method of reacting a solution comprising a mixture of chemical compounds which are in chemical equilibrium with one another with at least one further chemical compound (9) is provided. The method comprises the following steps: fractionation of the solut... | 08/26/2003 |
| 6608229 | Oxidation of polysaccharides with nitroxyls A simplified process for oxidizing starch and other polysaccharides in an aqueous solution or suspension using hypochlorite in the presence of a catalytic amount of a nitroxyl compound is described. The oxidation is process is bromide-free and is carried ... | 08/19/2003 |
| 6559346 | Method for the continuous production of glutaraldehyde In a process for the continuous preparation of glutaraldehyde by reaction of an alkoxydihydropyran of the formula I ##STR1## where R is C1 -C20 -alkyl, with water at from 0° C. to 200° C. and a pressure in the range from 0.01 bar t... | 05/06/2003 |
| 6518419 | Process for selective oxidation of primary alcohols Primary alcohols, especially in carbohydrates, can be selectively oxidized to aldehydes and carboxylic acids in a low-halogen process by using a peracid in the presence of a catalytic amount of a di-tertiary-alkyl nitroxyl (TEMPO) and a catalytic amount o... | 02/11/2003 |
| 6441246 | Catalytic synthesis of aldehydes by direct hydrogenation of carboxylic acids A process which makes it possible to prepare aldehydes under mild reaction conditions with a high efficiency through the reduction of carboxylic acids with molecular hydrogen. Specifically, a process of reducing an organic carboxylic acid with molecular h... | 08/27/2002 |
| 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 |
| 6180830 | Method for preparing a bimetallic ruthenium/tin catalyst and a process for the synthesis of aldehydes The present invention relates to a new process for the preparation of a bimetallic ruthenium/tin catalyst. The process for the preparation of a bimetallic ruthenium/tin catalyst according to the invention is characterised by the fact that it consists in c... | 01/30/2001 |
| 6013816 | Process for the preparation of a linear formyl compound Process for the preparation of a linear ω-formyl-carboxylic acid or a corresponding linear formylnitrile compound starting from an internally unsaturated C4 -C12 carboxylic acid or a corresponding ester or nitrile by means of hydrof... | 01/11/2000 |
| 5973210 | Intermetallic ruthenium tin-catalyst for use in aldehyde synthesis The present invention relates to a composition which can be used as reduction catalyst. This composition is characterized in that it comprises a support whose constituent material comprises at least one oxide chosen from oxides which are inert or capable ... | 10/26/1999 |
| 5780672 | Process for the selective preparation of monofluoro derivatives A process for the preparation of compounds of the formula (1) in which R1, R2 and R3 are as defined in the specification, which includes reacting alcohols or carboxylic acids of the formula (2) in which R1, R | 07/14/1998 |
| 5777184 | Preparation of fluoroalkyl compounds and their derivatives A process for producing a fluorinated olefin having the formula: CH3-a Fa CH.dbd.CHCl where a=1,2 or 3, said process comprising catalytically reacting a chlorinated organic compound with a fluorination agent under conditions sufficient to... | 07/07/1998 |
| 5723498 | Composition capable of releasing acrolein and its use A composition which is capable of releasing acrolein and is easy to handle contains (i) an acetal of acrolein with a C1-6 alcohol with 1 to 4 hydroxyl groups and (ii) an acid soluble therein and chemically compatible with a pKs value... | 03/03/1998 |
| 5679870 | Preparation of acetaldehyde Disclosed is a process for the preparation of acetaldehyde by the hydrogenation of ketene in the presence of a transition metal hydrogenation catalyst.... | 10/21/1997 |
| 5679869 | Preparation of aldehydes A process for preparing aldehydes of the general formula I ##STR1## where R1, R2 and R3 are each hydrogen, C1 -C6 -alkyl, C3 -C8 -cycloalkyl, aryl, C7 -C12 ... | 10/21/1997 |
| 5585523 | Process for the preparation of aldehydes by catalytic gas phase hydrogenation of carboxylic acid or their derivatives with the aid of a tin catalyst Process for the preparation of aldehydes by catalytic gas phase hydrogenation of carboxylic acid or their derivatives with the aid of a tin catalyst The invention relates to a process for the preparation of aldehydes by catalytic gas phase hydrogenation o... | 12/17/1996 |
| 5554790 | Process for producing acetic anhydride and acetic acid In a process for producing acetic anhydride and acetic acid by reacting methanol and methyl acetate, optionally together with dimethyl ether, with carbon monoxide, acetic anhydride and acetic acid are effectively produced with the use of a sequence of pro... | 09/10/1996 |
| 5386063 | Synthesis of (all-E)-2,7,-dimethylocta-2,4,6-triene-1,8-dial13 C4 (all-E)-2,7,-dimethylocta-2,4,6-triene-1,8-dial-13 C4 is synthesized from commercially available and relatively inexpensive starting compounds, and the key starting compound is triethyl phosphonoacetate-13 C2. T... | 01/31/1995 |
| 5334769 | Process for the synthesis of aldehydes and their derivatives The present invention relates to a process for the preparation of aldehydes by hydrogen reduction of carboxylic acids, esters or anhydrides, characterized in that the reduction is conducted in the vapour phase, in the presence of a bimetallic catalyst of ... | 08/02/1994 |
| 5321166 | Method for the production of aldehydes A process for the manufacture of aldehydes by the catalytic reduction of carboxylic acid halides with hydrogen in the presence of an alkylene oxide.... | 06/14/1994 |
| 5306845 | Method for producing an aldehyde A method for producing an aldehyde, which comprises hydrogenating a carboxylic acid or its alkyl ester with molecular hydrogen in the presence of a catalyst, wherein (1) chromium oxide of high purity having a specific surface area of at least 10 m2 | 04/26/1994 |
| 5243082 | Process for in-situ production of acrolein Acrolein is prepared by the heating of 3,4-dihydro-2H-pyran-2-carboxaldehyde. The process provides acrolein in very high yields and with few impurities. The process is advantageously employed to produce acrolein at the point of use.... | 09/07/1993 |
| 5239108 | Process for producing aliphatic or alicyclic aldehyde A process for producing an aliphatic or alicyclic aldehyde is disclosed, which process comprises the step of hydrogenating an aliphatic or alicyclic carboxylic acid or a derivative thereof with molecular hydrogen in the presence of a catalyst, wherein the... | 08/24/1993 |
| 5107030 | Method of making 2,7-dimethyl-2,4,6-octatrienedial and derivatives thereof The present invention is an improved method to prepare 2,7-dimethyl-2,4,6-octatrienedial and related derivative compounds. This method of making 2,7-dimethyl-2,4,6-octatrienedial and derivatives thereof includes reacting 2-butenyl-bisphosphonic acid tetra... | 04/21/1992 |
| 5059716 | Process for the preparation of aldehydes Aromatic and aliphatic aldehydes can be prepared from the corresponding aromatic or aliphatic carboxylic acids or the esters, anhydrides or halides thereof at elevated temperature by catalytic gas phase hydrogenation using hydrogen if use is made of a cat... | 10/22/1991 |
| 5053552 | Process for producing ,ଲ-unsaturated aldehyde The present invention provides a novel process for producing ,ଲ-unsaturated aldehydes including industrial important fragrances such as citral and sinensal, starting materials for preparing pharmaceutical drugs such as senecioaldehyde, farnes... | 10/01/1991 |
| 4997978 | Preparation of alkyl carboxylates by hydrocarbonylation Alkyl carboxylates of the formula: R--CO--O--CH2 R' are prepared by hydrocarbonylating a compound of the formula: R--CO--O--R' in the simultaneous presence, in the reaction medium, of cobalt, ruthenium, an alkyl iodide and an ionic iodide, the atomic rat... | 03/05/1991 |
| 4978804 | Processes for the conversion of myrcene to citral A novel process for converting myrcene to citral using palladium (II) chloride in the presence of an inert aqueous alkylamide solvent and a metal oxoanionic salt at a temperature of at least about 80° C. is disclosed. A novel process for converting a pal... | 12/18/1990 |
| 4978778 | Process for producing vinyl acetate A process for producing vinyl acetate which comprises reacting acetic anhydride with hydrogen in the presence of a catalyst comprising (a) a metal belonging to Group VIII of the Periodic Table or a compound of the metal, and (b) (i) an acidic substance, or (ii... | 12/18/1990 |
