Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7381851 | Method for producing formaldehyde A process for preparing formaldehyde by gas-phase oxidation of methanol vapor by means of a gas stream comprising molecular oxygen in the presence of a fixed-bed catalyst comprising iron and molybdenum, wherein the process is carried out in a reactor (1) havi... | 06/03/2008 |
| 7232788 | Mixed metal oxide catalysts for the production of unsaturated aldehydes from olefins A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount... | 06/19/2007 |
| 7193117 | Methanol 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 |
| 7000382 | Partial oxidation of alcohols A method of partially oxidizing an alcohol to an aldehyde or ketone comprises contacting a gas containing the alcohol with a solid catalyst containing molybdenum, preferably in a +6 oxidation state, and having a surface area of 10 m2/g or higher, preferab... | 02/21/2006 |
| 6624332 | In situ formation of metal-molybdate catalysts for methanol oxidation to formaldehyde The method of the present invention involves the in situ formation of metal-molybdate catalyst particles active for methanol oxidation to formaldehyde, with iron as an example, the catalyst is made by mixing particulate forms of Fe2 O3 | 09/23/2003 |
| 6559345 | Dual catalyst bed reactor for methanol oxidation A process and apparatus for oxidizing methanol in a gas stream into formaldehyde in a fixed bed reactor. The process first introduces a gas stream into a fixed bed reactor. The fixed bed reactor contains a catalyst bed having a depth, a width, a length, a... | 05/06/2003 |
| 6552233 | Vanadia-titania/metal-molybdate dual catalyst bed system and process using the same for methanol oxidation to formaldehyde A process and a catalyst reaction zone comprising one or more fixed bed reactors for oxidizing methanol in a reactant gas feed stream to formaldehyde. According to one embodiment, the process comprises introducing the reactant gas feed stream into an upst... | 04/22/2003 |
| 6518463 | Metal 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 |
| 6166266 | Preparation of polyoxymethylene dimethyl ethers by catalytic conversion of dimethyl ether with formaldehyde formed by oxidation of methanol A particularly useful process which includes the steps of providing a source of formaldehyde formed by conversion of methanol in the presence of a catalyst comprising oxides of molybdenum as an essential catalyst component; and contacting the source of fo... | 12/26/2000 |
| 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 |
| 5330958 | Catalyst granules, in particular for the oxidative dehydrogenation of methanol in order to yield formaldehyde A configuration of cylindrical catalyst granules displays a trilobed or triangular cross-section provided with three through-bores equidistant from each other, each of which through-bores has its axis parallel to the axis of the cylindrical granule.... | 07/19/1994 |
| 5326915 | Catalyst granules, in particular for the oxidative dehydrogenation of methanol in order to yield formaldehyde A configuration of cylindrical catalyst granules displays a trilobed or triangular cross-section provided with three through-bores equidistant from each other, each of which through-bores has its axis parallel to the axis of the cylindrical granule (FIG. ... | 07/05/1994 |
| 5312975 | Process for the preparation of 5-(2,4-difluorophenyl)-salicylic acid A process for the preparation of 5-(2,4-difluorophenyl)-salicylic acid comprising the reaction of an organometallic derivative with a suitable substituted benzene in the presence of a transition-metal based catalyst is described.... | 05/17/1994 |
| 5144090 | Method for preparing acrolein or methacrolein A method for preparing acrolein or methacrolein comprises subjecting propylene, secondary propanol, isobutylene or tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of a catalyst represented by the following general f... | 09/01/1992 |
| 5138100 | Method for preparing methacrolein A method for preparing methacrolein comprises subjecting isobutylene or a tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of a catalyst which comprises a mixture of a composition (I) represented by the following gen... | 08/11/1992 |
| 5118868 | Catalyst for preparing aldehyde A catalyst for the partial oxidation of an alcohol to a corresponding aldehyde. The catalyst includes a monolithic structured inert carrier and an active catalytic mixture of oxides of molybdenum and either chromium, vanadium, aluminum, iron, tungsten, ma... | 06/02/1992 |
| 4829042 | Catalyst suitable for the oxidation of methyl alcohol to formaldehyde and method for preparing the catalyst Catalyst suitable for the oxidation of CH3 OH to CH2 O, comprising a mixture of a well known catalytic system, herein indicated as mixed oxides, based on FE2 (MoO4)3 molybdenum trioxide (MoO3 | 05/09/1989 |
| 4740627 | Synthesis of E,Z-11-tetradecen-1-al The present invention pertains to a process for making a E,Z-11-tetradecen-1-al containing from 80 to 83 mole percent of the E isomer and from 17 to 20 mole percent of the Z isomer which exhibits pheromone-like activity for the spruce bud worm (choristone... | 04/26/1988 |
| 4479013 | Catalyst and process for unsaturated aldehydes A catalyst composition useful for the oxidation of olefins, particularly the vapor phase oxidation of isobutylene and/or tertiary butyl alcohol to produce methacrolein, consists essentially of the combination of oxides of molybdenum, cobalt, iron, bismuth... | 10/23/1984 |
| 4471141 | Preparation of aldehydes Aqueous alcoholic solutions such as hydrous alkanols may be converted to the corresponding aldehyde in a process which involves high conversion levels and high selectivity levels by treating the solution with an oxygen-containing gas in the presence of a ... | 09/11/1984 |
| 4453020 | Process 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 |
| 4446328 | Process for producing methacrolein A process for producing methacrolein by oxidizing isobutylene or tertiary butanol with molecular oxygen, characterized by contacting a gaseous mixture of isobutylene or tertiary butanol, air or oxygen and optionally steam and an inert gas with a catalyst ... | 05/01/1984 |
| 4442307 | Conversion of dimethyl ether to formaldehyde using Bi-Mo-Fe catalyst A process is disclosed for oxidizing dimethyl ether to formaldehyde using a catalyst comprising a mixture of oxides of bismuth, molybdenum and iron.... | 04/10/1984 |
| 4439624 | Conversion of dimethyl ether to formaldehyde using Bi-Mo-Cu catalyst A process is disclosed for oxidizing dimethyl ether to formaldehyde using a catlyst comprising a mixture of oxides of bismuth, molybdenum and copper.... | 03/27/1984 |
| 4421938 | Preparation of aldehydes Alcohols such as those containing from about 1 to about 10 carbon atoms may be converted to aldehydes by treating the alcohols with an oxygen-containing gas such as air or oxygen in the presence of a catalyst comprising at least two oxides of metals selec... | 12/20/1983 |
| 4420641 | Formaldehyde production New catalysts comprising lead and silver on supports having relatively low surface areas and their use have been found to be useful in the oxidative dehydrogenation of methanol to formaldehyde at elevated temperatures.... | 12/13/1983 |
| 4404397 | High conversion of C3 and C4 olefins to corresponding unsaturated aldehydes and acids with stable molybdenum catalysts A stabilized heteropoly molybdate catalyst precursor in calcined form and containing anionic molybdenum in defect state is surface impregnated with certain metal cations. The stabilized precursor is one obtained by incorporating into the reaction product ... | 09/13/1983 |
| 4358623 | Process for catalytically converting methanol to formaldehyde In catalytically oxidizing methanol in the vapor phase according to already-known processes for the production of formaldehyde, the hot formaldehyde-containing gaseous effluent of the catalytic converter is rapidly cooled by being passed through the tubes... | 11/09/1982 |
| 4355187 | Process for the manufacture of methyl glyoxal Methyl glyoxal is prepared by oxidation of propylene glycol-1,2 in the gaseous phase on a heterogeneous catalyst. The process is carried out with an excess of oxygen and the catalyst used contains molybdenum and at least one of the metals: vanadium, silve... | 10/19/1982 |
| 4343954 | Formaldehyde process A process for converting methanol to formaldehyde wherein methanol along with a stream containing air, water, methanol and formaldehyde is fed to a primary reactor 5 containing a silver catalyst maintained at from 630° to 650° C. The effluent from the p... | 08/10/1982 |
| 4306089 | Process for the production of formaldehyde This invention relates to the production of formaldehyde and to catalysts which may be used therefore. In more detail the invention relates to a process for the production of formaldehyde from methanol includes the passage, at an elevated temperature, of ... | 12/15/1981 |
| 4302609 | Process for the manufacture of methylglyoxal Methylglyoxal is manufactured continuously by passing glycerol in the gaseous phase over a heterogeneous dehydrogenation catalyst.... | 11/24/1981 |
| 4258217 | Process for producing methacrolein A process for producing methacrolein by oxidation of isobutylene or tert-butanol with molecular oxygen in the presence of a catalyst having the following composition: ti Mo12 Bia Feb Nic Pbd Xf ... | 03/24/1981 |
| 4208353 | Production of formaldehyde This invention relates to the production of formaldehyde and to catalysts therefor. In particular the inventor relates to a process for the production of formaldehyde from methanol including the passage, at an elevated temperature, of a gas stream contain... | 06/17/1980 |
| 4087462 | Production of formaldehyde in a fluidized bed with a fixed temperature gradient Formaldehyde is prepared by gas phase reaction of methanol with oxygen in a fluidized bed of an oxide catalyst in which the arrangement of the particles in the fluidized bed provides a negative temperature gradient in the direction of gas flow.... | 05/02/1978 |
| 4067908 | Process for the production of formaldehyde A process is provided for the production of formaldehyde by oxidizing methanol in the presence of a catalyst containing metal oxides wherein the feed stream is admixed, outside the reaction stage, with at least one portion of the reaction product.... | 01/10/1978 |
| 4024074 | Catalyst for the oxidation of methanol to formaldehyde and process for preparing the same A catalyst active and selective in the oxidation of methanol to formaldehyde is prepared by mixing an aqueous molybdate solution with an aqueous solution of a ferric salt, while maintaining a Mo/Fe atomic ratio of from 1.6:1 to 2.2:1 in the mixture, heati... | 05/17/1977 |
| 3987107 | Conversion of methanol to formaldehyde Methanol is converted to formaldehyde in a two step vapor phase process. In the first step the methanol is partially converted to formaldehyde over a silver catalyst, and in the second step the remaining methanol is converted to formaldehyde over a bismut... | 10/19/1976 |
| 3983073 | Process for preparing a catalyst for the oxidation of methanol to formaldehyde A catalyst active in the oxidation of methanol to formaldehyde is prepared by forming a suspension of an amorphous precipitate by mixing an aqueous molybdate solution with an aqueous solution of a ferric salt, while maintaining an atomic ratio Mo/Fe of at... | 09/28/1976 |
| 3978136 | Process for the production of a catalyst suitable for the oxidation of methanol to formaldehyde Catalysts for the oxidation of methanol to formaldehyde are prepared having an MoO3 :Fe2 O3 weight ratio below 10:1 by coprecipitating dissolved molybdenum and iron compound, mixing up to 90% of titanium dioxide with the c... | 08/31/1976 |
