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A wristwatch including a watch band and a watch body having an octagon shaped perimeter and being red in color and having the word STOP thereon to resemble a stop sign.

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Class 568/473 - Silver containing catalyst utilized


Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein a catalyst containing silver is utilized.
No. of patents: 73
Last issue date: 03/04/2008


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NumberTitleIssue Date
7338579Dewatering process
A formaldehyde-containing product is separated from a formalin solution containing formaldehyde, water, and methanol by distilling in the presence of a water entraining compound, especially methyl propionate or methyl methacrylate. The product contains substantially...
03/04/2008
7259129Silver-containing catalysts, the manufacture of such silver-containing catalysts, and the use thereof
A high activity and high selectivity silver catalyst comprising silver and, optionally, one or more promoters supported on a suitable support material having the form of a shaped agglomerate. The structure of the shaped agglomerate is that of a hollow cylinder havin...
08/21/2007
7247600Catalyst composition
There is provided a catalyst carrier comprising a refractory inorganic material having a sodium solubilization rate no greater than 5 ppmw/5 minutes. There is further a catalyst comprising a refractory inorganic material carrier having a sodium solubilization rate n...
07/24/2007
7232786Catalyst composition
There is provided a catalyst carrier comprising a refractory inorganic material having a sodium solubilization rate no greater than 5 ppmw/5 minutes. There is further a catalyst comprising a refractory inorganic material carrier having a sodium solubilization rate n...
06/19/2007
7232918Catalyst composition
There is provided a catalyst carrier comprising a refractory inorganic material having a sodium solubilization rate no greater than 5 ppmw/5 minutes. There is further a catalyst comprising a refractory inorganic material carrier having a sodium solubilization rate n...
06/19/2007
7193117Methanol oxidation over bulk metal vanadate catalysts
A method wherein a methanol-containing gas stream is passed in contact with a catalyst comprising a supported or unsupported bulk vanadate catalyst in the presence of an oxidizing agent for a time sufficient to convert at least a portion of the methanol to formaldeh...
03/20/2007
7109382Method for the production of formaldehyde
A method for formaldehyde production through catalytic oxidation of methanol, comprising the steps of feeding to a first oxidation catalytic bed (2) a gas flow comprising methanol and oxygen at a predetermined crossing linear flow rate, obtaining at the outle...
09/19/2006
7091386Method for facilitating catalyzed oxidation reactions, device for facilitating catalyzed oxidation reactions
A catalytic process for the oxidation of organic. Oxygen is loaded into a metal foil by heating the foil while in contact with an oxygen-containing fluid. After cooling the oxygen-activated foil to room temperature, oxygen diffuses through the foil and oxidizes reac...
08/15/2006
6518463Metal molybdate/iron-molybdate dual catalyst bed system and process using the same for methanol oxidation to formaldehyde
A process and fixed bed reactor for oxidizing methanol in a reactant gas feed stream to formaldehyde. The process comprises introducing the reactant gas feed stream into an upstream region containing a first metal molybdate catalyst (substantially free of...
02/11/2003
6313343Process for the preparation of alpha-oxoaldehydes
Alkylene glycol is oxidized in a vapor phase in the presence of alcohol (a), oxygen, and a catalyst (a) (primary reaction). ଱-oxoaldehyde, and alcohol (b) or olefin, are oxidized in a vapor phase in the presence of oxygen and a catalyst (b) (seconda...
11/06/2001
6265528Preparation of polyoxymethylene dimethyl ethers by acid-activated catalytic conversion of methanol with formaldehyde formed by oxy-dehydrogenation of dimethyl ether
A particularly useful process which includes the steps of providing a feedstream comprising a soluble condensation promoting component capable of activating a heterogeneous acidic catalyst and a source of formaldehyde formed by conversion of dimethyl ethe...
07/24/2001
6255534Preparation of carbonyl compounds
Carbonyl compounds of the formula ##STR1## where R1 is a hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms, R2 is a hydrogen atom, an unsubstituted or C1 -C3 -alkyl-monosubstituted to -trisubstit...
07/03/2001
6147263Formaldehyde production
A process for the catalytic conversion of methanol to formaldehyde wherein a gas stream containing methanol and oxygen is contacted with a silver catalyst in a first conversion zone containing a silver catalyst to produce an effluent containing formaldehy...
11/14/2000
6133482Method for producing carbonyl compounds
In a process for preparing carbonyl compounds of the formula ##STR1## where R1 is a hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms, R2 is a hydrogen atom or a radical of the formula ##STR2## where R3...
10/17/2000
6072087Method for producing carbonyl compounds
The present invention relates to a process for the preparation of carbonyl compounds of the formula ##STR1## in which R1 denotes a hydrogen atom or an alkyl radical containing from 1 to 3 carbon atoms, R2 denotes a hydrogen atom...
06/06/2000
6013843Continuous 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
5990358Process for the preparation of formaldehyde
A process for preparing formaldehyde by oxidative dehydrogenation of methanol comprises passing a gas mixture (i) comprising a) from 0.1 to 50% by volume of methanol, b) from 0.1 to 30% by volume of oxygen, c) from 0 to 50% by volume of nitrogen oxide and d) from 0...
11/23/1999
5877356Process for the continuous preparation of aqueous formaldehyde solutions
The process uses a supply column and additional heat exchangers associated with absorption columns. Air and methanol from outside and a subcurrent of methanol, originating from a cold methanol current exiting from the supply column, are fed to the supply ...
03/02/1999
5859070Catalytic 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
5241122Catalysts comprising group IB metals
Catalysts, catalyst precursors, and catalytic systems are provided. The catalysts generally comprise a substrate that includes a group IB metal and a porous, microcrystalline layer that includes the metal and that is disposed on at least a portion of the ...
08/31/1993
5196609Preparation of 3-alkoxycarbonyl propenals and 3-dialkoxymethyl propenals
The preparation of 3-alkoxycarbonyl propenals and 3-dialkoxymethyl propenals of the general formulae Ia and Ib respectively: ##STR1## (R1 =C1 -C3 -alkyl group; R2 and R3 =hydrogen, methyl, or eth...
03/23/1993
5149884Tube bundle reactor, use thereof in exothermic organic reactions, and preparation of ketones and aldehydes using same
In a tube bundle reactor for carrying out catalytic organic reactions in the gas phase, comprising reaction tubes (A) arranged between tubesheets (B), the reaction tubes have an inside diameter ranging from 0.5 to 3 cm, the ratio of reaction tube length t...
09/22/1992
5041686Process for the preparation of carbonyl compounds
A process for the preparation of carbonyl compounds by the oxydehydrogenation of (C1 -C4)-alcohols is carried out at a temperature from 400° to 700° C. in the presence of a silicate catalyst which has been doped with silver and sil...
08/20/1991
4978803Vapor phase oxidation process for making glyoxal
In the process for making glyoxal by catalytic oxidation of ethylene glycol in contact with catalyst comprising copper, glyoxal yield is improved and catalyst life is improved by the presence of a small amount of iodine or organic iodide in the reactant f...
12/18/1990
4929768Process for preparing dialdehyde
A process for preparing a dialdehyde which comprises subjecting a glycol to oxidation-dehydrogenation in the presence of silver particles of which the surface is partially coated with a silicon carbide powder or a silicon nitride powder. According to the ...
05/29/1990
4851584Preparation of carbonyl compounds
A process for the preparation of carbonyl compounds by oxidation of alcohols in the gas phase with a gas containing oxygen in the presence of catalysts containing copper and silver....
07/25/1989
4816606Continuous preparation of aldehydes and ketones
Aldehydes and ketones of the general formula I ##STR1## where R1 is hydrogen or an organic radical of 1 to n carbon atoms and R2 is a non-aromatic organic radical of 1 to m carbon atoms, (m+n) ranging from 2 to 24 and R1
03/28/1989
4814513Preparation of carbonyl compounds
A process for the preparation of carbonyl compounds by oxidation of alcohols in the gas phase with a gas containing oxygen in the presence of catalysts containing copper or silver and a phosphorus compound that is volatile under the conditions of the reac...
03/21/1989
4786743Silver catalyst and a process for preparing same
A supported silver catalyst having improved thermostability is prepared by depositing silver particles on a carrier or support having a stepped structure....
11/22/1988
4594457Process for producing aqueous formaldehyde solution
An aqueous formaldehyde solution having a formaldehyde concentration of 37 to 60% by weight is produced with less consumption of methanol under methanol-rich mild reaction conditions from a feed gas containing methanol, air, and steam, and, if necessary, ...
06/10/1986
4584412Preparation of formaldehyde
Formaldehyde is prepared by (a) passing a mixture of methanol and water with a concentration of between 50 and 90% by weight, based on the total weight of the two substances, of methanol into a packed column which possesses a packing having a total layer ...
04/22/1986
4555583Preparation process for glyoxal
Glyoxal may be produced with a high yield by bringing a gas, which has been formed by diluting ethylene glycol and molecular oxygen with an inert gas, into contact at a high temperature with a silver catalyst in the simultaneous presence of phosphorus or ...
11/26/1985
4511739Continuous preparation of glyoxal
Glyoxal is prepared by oxidizing glycol in the presence of a silver catalyst, with subsequent or partial condensation of glycol, glyoxal, glycol aldehyde, formaldehyde and/or water by treatment with water or aqueous glyoxal solution in fine dispersion, un...
04/16/1985
4474997Oxidation process and catalyst therefor
An oxidation catalyst comprising boron phosphate impregnated with from 5 to 20 weight percent silver and its use to oxidize propylene, butene-1, butadiene-1,3 and methanol is disclosed. The oxidation takes place at from 200° to 700° C. Preferably water ...
10/02/1984
4474996Production of formaldehyde
Methanol is converted to formaldehyde by oxidative dehydrogenation using as catalyst sputtered or ion plated silver or silver/gold alloy on an inert hard, nonporous support....
10/02/1984
4454354Manufacture of aqueous formaldehyde
Formaldehyde manufacture by oxidative-dehydrogenation of methanol over a silver or copper catalyst. Aqueous formaldehyde solution is obtained from the reaction and is stripped of a mixture of methanol, formaldehyde and water by a low energy process at rel...
06/12/1984
4453020Process for purifying the methanol employed in the preparation of formaldehyde
The invention relates to a process for purifying, by treatment with an acid ion exchanger and, if desired, a basic ion exchanger, the methanol employed in the preparation of formaldehyde....
06/05/1984
4450301Process for converting methanol to formaldehyde
In a process for oxidizing methanol to formaldehyde which comprises passing the methanol with molecular oxygen through two sequential silver-based catalysts, with the second of said catalysts being a bed of particulate silver such as, specifically, silver...
05/22/1984
4440960Continuous preparation of 3-alkyl-buten-1-als
A process for the continuous preparation of 3-alkyl-buten-1-als by oxidative dehydrogenation of 3-alkyl-buten-1-ols at from 320° to 650° C. with oxygen over a catalyst containing copper and/or silver, wherein, within one second after contact with the ca...
04/03/1984
4439625Production of formaldehyde
A process for converting methanol to formaldehyde at 450° to 750° C. using as catalyst silver, silver-gold alloys or copper-gold alloys in which from 0.001 to 15 parts per million, based on methanol, of phosphorus or phosphorus from a phosphorus compoun...
03/27/1984
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