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| Number | Title | Issue Date |
| 7456325 | Process for the production of a hydroxyalkyne by coupling reaction between acetaldehyde and a terminal alkyne A process for performing, a coupling reaction between acetaldehyde and a terminal alkyne to yield a hydroxyalkyne is described comprising the steps of; (i) reacting without solvent, a terminal alkyne with a Lewis acidic metal salt in the presence of a alkanolamine l... | 11/25/2008 |
| 7411098 | Method for the production of tetrahydrogeranylacetone The present invention relates to a process for preparing tetrahydrogeranylacetone (tetrahydropseudoionone) by aldol condensation of citral with acetone and subsequent hydrogenation. The invention further relates to the use of thus obtained tetrahydro-geranylacetone ... | 08/12/2008 |
| 7288693 | Pulse flow reaction A method of operating a multi-phase downflow reactor so as to induce a pulsing flow regime is disclosed. The pulse may be induced by increasing the gas rate while maintaining the liquid rate until a pressure drop sufficient to induce the pulse flow is achieved. The ... | 10/30/2007 |
| 7232933 | Preparation and use of diols A process for the preparation of diols by a Lewis acid-catalysed aldehyde addition reaction on hydroxyalkynes followed by hydrogenation is described. The process provides a wide range of diols from simple, readily available starting materials. In particular the proc... | 06/19/2007 |
| 7208646 | Selective hydrogenation of butadiene A process for the selective hydrogenation of dienes in mixed streams of olefin containing hydrocarbons, such as butadiene in a mixed C4 stream with minimum loss of monoolefins is disclosed wherein the reactor is operated at conditions which induce pulse f... | 04/24/2007 |
| 7078358 | Low VOC cleanroom cleaning wipe A prewetted cleaning wipe for cleaning surfaces and having low volatile organic chemical and low nonvolatile residue properties comprising a wipe substrate wetted with an aqueous solution of high purity water and an effective amount of an acetylenic alcohol surface ... | 07/18/2006 |
| 6956141 | Method for preparing acetylene alcohols and their secondary products A process for preparing at least one unsaturated alcohol (B) comprises the steps (I) to (III) below: (I) reaction of at least one alkali metal hydroxide or alkaline earth metal hydroxide with at least one alcohol (A) in at least one organic solvent (L) ... | 10/18/2005 |
| 6710213 | Production process and use for propargyl alcohol and its intermediate Processes are provided for producing propargyl alcohol in an industrially advantageous manner. One of the processes comprises reaction of 1,2,3-trichloropropane with 3 equivalents or more of an alkali compound to produce propargyl alcohol. The other process comprise... | 03/23/2004 |
| 6641986 | Acetylenic diol surfactant solutions and methods of using same Aqueous solutions comprising one or more acetylenic diol type surfactants are used to improve the wettability of a substrate surface by lowering the contact angle of the aqueous developer solution are enclosed herein. In one embodiment, the aqueous soluti... | 11/04/2003 |
| 6586644 | Process for producing optically active propargyl alcohols A process for producing an optically active propargyl alcohol represented by the following formula (4): ##STR1## wherein R1 is an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an alkylsilyl group, an... | 07/01/2003 |
| 6506946 | Process for continuous production of acetylenediol The present invention provides a process for producing an acetylenediol continuously by reacting a ketone with acetylene in the presence of an alkali catalyst, which process comprises continuously feeding, into a first-stage reactor, a reaction solvent, a... | 01/14/2003 |
| 6462207 | Polyethylene glycol diene derivatives A series of polyethylene glycol derivatives possessing a diene moiety has been prepared and characterized. The reactivities of these derivatives in various Diels-Alder reactions have been demonstrated. The potential derivatives, which can be made by vario... | 10/08/2002 |
| 6369282 | Preparation of alkynediols The process for preparing alkynediols of the formula (I) R1 R2 C(OH)--C.ident.C--C(OH)R1 R2 (I) where R1, R2 are each independently H, or a C1-20 -hydrocarbon radical which may be substit... | 04/09/2002 |
| 6350714 | Method for preparing a catalyst and catalysts prepared accordingly The present invention relates to a process for preparing a catalyst by activating a catalytic composition which comprises a) at least one metal of group IB or IIB or a compound thereof, b) where appropriate a carrier which comprises treating the composition with an... | 02/26/2002 |
| 6297407 | Method for producing alkyne diols The invention relates to a method for producing alkyne diols by reacting ketones with acetylenic hydrocarbons in an organic solvent in the presence of a base which contains potassium alcoholates of primary and/or secondary alcohols. The alkyne diols are p... | 10/02/2001 |
| 6147266 | Method for producing acetylene alcohol compounds using continuous process There is disclosed a method for producing acetylene alcohol compounds in a continuous process, which are produced via ethynylation in which ketones containing a group --CH2 COCH2 --, are condensed with acetylenes at a temperature of ... | 11/14/2000 |
| 6140545 | Preparation of alcohols In a process for preparing alcohols by gas phase hydrogenation of carboxylic acids or esters thereof at elevated temperature and elevated pressure in the presence of catalysts consisting of or comprising, as hydrogenating components, oxides of main group ... | 10/31/2000 |
| 5973213 | Process for separating solids from aqueous 1,4-butynediol solutions Solids are separated from aqueous 1,4-butynediol solutions by passing a solids-containing aqueous butynediol solution in the downflow mode through a column and thus bringing it into contact with a solvent which has a lower density than the solids-containi... | 10/26/1999 |
| 5763688 | Method for producing an alcohol The present invention provides a method for producing a alcohol including an optically active alcohol by hydrogenating a carbonyl compound in the presence of a homogeneous catalyst, a base and a nitrogen-containing organic compound. Thus, the reaction emp... | 06/09/1998 |
| 5444169 | Process and apparatus for the synthesis of butynediol The conversion of formaldehyde and acetylene in the presence of a suspension catalyst to butynediol is usually performed in a cascade of reactors, wherein the separation of the catalyst from the product solution takes place per individual reactor. This ca... | 08/22/1995 |
| 5420365 | Preparation of 2,4-hexadiyne-1,6-diol Process for the preparation of 2,4-hexadiyne-1,6-diol of the formula I HO-CH2 -CH2 -C.ident.C-.ident.C-CH2 -OH (I) by the reaction of diacetylene of the formula II H-C.ident.C-C.ident.C-H (II) with ... | 05/30/1995 |
| 5410094 | Tertiary alkynols Processes for synthesizing tertiary alkynols by reacting carbonyl-group-containing compounds with alkynes in the presence of a basic catalyst are disclosed. Preferred products are 6,10,14-trimethyl-4-pentadecyn-6-ol compounds having the structure: ##... | 04/25/1995 |
| 5349071 | Process for preparing tertiary alkynols Processes for synthesizing tertiary alkynols by reacting carbonyl-group-containing compounds with alkynes in the presence of a basic catalyst are disclosed. Preferred products are 6,10,14-trimethyl-4-pentadecyn-6-ol compounds having the structure: ##... | 09/20/1994 |
| 5324869 | Substituted-acyclic terpene compound Acyclic terpene compounds useful as intermediates or producing sarcophytol A which have an anti-carcinogenic promotor activity and anti-tumor activity, which compounds are shown by the general formula (I): ##STR1##... | 06/28/1994 |
| 5049681 | Optically active allyl alcohol and process for producing leucotriene B.sub. 4 A novel optically active allyl alcohol derivative represented by the following general formulae (I), (II), (III) and (IV): ##STR1## The novel optically active allyl alcohol can be used effectively for producing leucotrienes B4 by the proce... | 09/17/1991 |
| 4965376 | 3,9-dihydroxynonyne and its derivatives protected at the 9-OH function 3,9-Dihydroxynonyne and its derivatives protected at the 9-OH function, of the general formula I ##STR1## where R is hydrogen or a conventional alcohol protective group, and processes for the preparation of the compounds I.... | 10/23/1990 |
| 4960959 | Process for the manufacture of alkynediols by reaction of ketones with acetylene A process for manufacturing an alkynediol is disclosed. In this process, a C3-12 ketone is reacted with acetylene in the presence of potassium hydroxide in an C1-4 alkyl-tert-butyl ether solvent. The potassium hydroxide is used in a ... | 10/02/1990 |
| 4954527 | Novel polyacetylene compositions and their methods of use This invention relates to novel polyacetylene compositions, a process of producing the compositions and a method for inhibiting tumors utilizing the compositions. More particularly, the compositions are antitumor polyacetylenes which are derived form mari... | 09/04/1990 |
| 4952292 | Process for manufacturing 2,4-hexadiyne-1,6-diol A method of manufacturing 2,4-hexadiyne-1,6-diol by the oxidative coupling of propargyl alcohol, in the presence of an aliphatic C4 alcohol solvent is disclosed. The 2,4-hexadiyne-1,6-diol is completely dissolved in the butanol. Residual salts ... | 08/28/1990 |
| 4847440 | Method of manufacturing propynol A process for manufacturing propynol from formaldehyde and acetylene is disclosed. In this process the acetylene is first dissolved in a dimethoxymethane solvent under strong cooling and at slight gauge pressure. The cool acetylene-containing solution is ... | 07/11/1989 |
| 4584418 | Preparation of butynediol Agglomerates of spheroidal masses of malachite crystals are prepared so that they contain silicic acid. These agglomerates can be used to prepare a copper-acetylide complex, which in turn can be used as a catalyst for the preparation of 1,4-butynediol fro... | 04/22/1986 |
| 4536491 | Agglomerates of malachite crystals and method for their preparation Agglomerates of spheroidal masses of malachite crystals are prepared so that they contain silicic acid. These agglomerates can be used to prepare a copper-acetylide complex, which in turn can be used as a catalyst for the preparation of 1,4-butynediol fro... | 08/20/1985 |
| 4388216 | Regenerating heavy metal catalysts for butynediol production A process for regenerating suspended heavy metal catalysts used in the synthesis of butynediol from acetylene and formaldehyde. The aqueous catalytic slurry removed from the reaction mixture is raised to a temperature of about 200° to 500° C., where app... | 06/14/1983 |
| 4317905 | Preparation of compounds containing two conjugated double bonds cis-cis and cis-trans A process is disclosed for preparing aliphatic compounds containing two conjugated double bonds cis-cis or cis-trans, characterized in that a compound of the general formula ##STR1## (in which R is H, alkyl from C1 to C10, or OY... | 03/02/1982 |
| 4294997 | Process for the control of pH in the ethynylation of formaldehyde In the ethynylation of formaldehyde in the presence of a copper acetylide catalyst to produce butynediol, pH is controlled by the incremental or continuous addition of an alkali metal hydroxide and an alkali metal carbonate at an equivalent ratio of hydro... | 10/13/1981 |
| 4288640 | Carrying out exothermic reactions between a gas and a liquid Process for carrying out exothermic reactions between a gas and a liquid in the presence of a solid catalyst by passing the gas and the liquid cocurrently through a packed reaction vessel, preferably of elongated shape, wherein the gas and liquid pass thr... | 09/08/1981 |
| 4288641 | Process for the preparation of 1,4-butynediol and related catalyst The process for the preparation of 1,4-butynediol through the reaction of acetylene with formaldehyde in the presence of a catalytic metal, preferably copper, is improved by using, as the support of the catalytic metal, a molecular sieve or synthetic zeol... | 09/08/1981 |
| 4202822 | 1-Hydroxymethyl-1-oxo-prostane derivatives of the F1 series Derivatives, analogs, and congeners of prostane having a 1-(hydroxymethyl)-1-oxo-prostane structure in the F1 series.... | 05/13/1980 |
| 4180687 | Reaction of formaldehyde in butynediol Formaldehyde in crude BYD, can be reacted to a polymeric substance in the presence of NaOH or Na2 CO3 at high temperatures.... | 12/25/1979 |
| 4165330 | Asymmetric synthesis via optically active chelating agents An asymmetric synthesis process which involves addition of optically active chelated organometal compounds of lithium, sodium, beryllium, magnesium, zinc, copper and cadmium to prochiral unsaturated substrates. The optically active chelating agent is not ... | 08/21/1979 |
