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| Number | Title | Issue Date |
| 7872131 | Method for producing a solution of pure triethylenediamine (TEDA) Process for preparing a solution of pure triethylenediamine (TEDA), in which TEDA is vaporized, the gaseous TEDA is passed into a liquid solvent 1 (quench) and the TEDA is crystallized from the resulting solution and separated off (solid-liquid separation), wherein ... | 01/18/2011 |
| 7345173 | Work-up of the mother liquor obtained in the preparation of high-purity triethylenediamine In a process for the purification of triethylenediamine (TEDA) in which TEDA is vaporized and the gaseous TEDA is passed into a liquid solvent and is subsequently crystallized from this, the mother liquor obtained after the TEDA has been crystallized is extracted wi... | 03/18/2008 |
| 7309403 | Method for avoiding corrosion The invention relates to a method of avoiding corrosion in the separation of methylamine from a product stream (10) which is obtained in the preparation of methylamines by gas-phase reaction of methanol and ammonia and includes monomethylamine, dimethylamine,... | 12/18/2007 |
| 7244657 | Zeolite sol and method for preparing the same, composition for forming porous film, porous film and method for forming the same, interlevel insulator film, and semiconductor device The present invention provides a zeolite sol which can be formed into a porous film that can be thinned to an intended thickness by a method used in the ordinary semiconductor process, that excels in dielectric properties, adhesion, film consistency and mechanical s... | 07/17/2007 |
| 7176103 | Zeolite sol and method for preparing the same, composition for forming porous film, porous film and method for forming the same, interlevel insulator film, and semiconductor device The present invention provides a zeolite sol which can be formed into a porous film that can be thinned to an intended thickness by a method used in the ordinary semiconductor process, that excels in dielectric properties, adhesion, film consistency and mechanical s... | 02/13/2007 |
| 7151177 | Process for the preparation of highly pure triethylene diamine Highly pure triethylenediamine is obtained by a process in which triethylenediamine is freed from high boilers and then the triethylenediamine is vaporized from the mixture thus obtained and is passed into a liquid solvent. The process makes it possible in particula... | 12/19/2006 |
| 7132538 | Isolation of high-purity triethylenediamine (TEDA) by distillation Process for purifying triethylenediamine (TEDA) by disillation, in which the fractionation is carried out in a dividing wall column. ... | 11/07/2006 |
| 7115742 | Process for the preparation of triethylenediamine (TEDA) from ethylenediamine A process for the preparation of triethylenediamine (TEDA) by reaction of ethylenediamine (EDA) in the presence of a zeolite catalyst, wherein the zeolite catalyst contains one or more metals M in oxidation states II, III or IV as oxides. The desired molar ratio of ... | 10/03/2006 |
| 7098162 | Catalysts for deep catalytic cracking of petroleum naphthas and other hydrocarbon feedstocks for the selective production of light olefins and method of making thereof Provided herein are monocomponent and hybrid catalyst compositions for use in steam-cracking of hydrocarbon feeds to selectively produce light olefins. The catalyst compositions being characterized by a first catalytic component comprising oxides of aluminum, silico... | 08/29/2006 |
| 7094941 | Selectivated metallosilicate catalyst composite for alkyl aromatic conversion, process for the preparation thereof, use thereof in hydrocarbon conversion A repeated “soak and dry” selectivation process for preparing a modified metallosilicate catalyst composite is disclosed comprising of a mixture of amorphous silica, alumina and a pore size controlled metallosilicate useful for alkylaromatic conversion. The proc... | 08/22/2006 |
| 7074926 | Decoloration and color stabilization of TEDA solution The present invention relates to a process for preparing TEDA solutions comprising a solvent selected from the group consisting of polyhydric alcohols and ethers of polyhydric alcohols. The process comprises passing gaseous TEDA into the solvent and subsequently tre... | 07/11/2006 |
| 7049260 | Selective para-xylene production via methylation of toluene with methanol in the presence of modified HZSM-5 catalyst We disclose a method for converting toluene to xylenes, comprising contacting toluene with methanol in the presence of a silica-bound HZSM-5 catalyst. As an example, in one embodiment the method can include: (i) first silylating HZSM-5, to form silylated HZSM-5; (ii... | 05/23/2006 |
| 6958397 | Method of selectively synthesizing triethylenediamine The present invention describes a process for the preparation of triethylenediamine by reacting piperazine over a zeolite catalyst which, in addition to SiO2, contains an oxide of at least one further divalent, trivalent or tetravalent metal M, wherein th... | 10/25/2005 |
| 6627756 | Preparation of pure triethylenediamine Pure triethylenediamine (TEDA) is prepared by vaporizing TEDA, introducing the gaseous TEDA into a liquid solvent and subsequently crystallizing the TEDA from the solution obtained in this way.... | 09/30/2003 |
| 6562971 | Process for the preparation of triethylenediamine (TEDA) A process for the preparation of triethylenediamine (TEDA) by reaction of ethylenediamine (EDA) in the presence of a zeolite catalyst, wherein the zeolite catalyst comprises one or more metals M in oxidation states II, III or IV as oxides, and for M=Al, has an... | 05/13/2003 |
| 6555688 | Method for the production of triethylene diamine making use of ethylene diamine The invention in question is concerned with a method for the production of triethylene diamine using ethylene diamine as an educt and zeolite catalysts of the Pentasil type.... | 04/29/2003 |
| 6552194 | Process for the preparation of pure triethylenediamine (TEDA) The invention relates to the preparation of pure triethylenediamine (TEDA) by evaporating TEDA from the mixture comprising a solvent or diluent, where the solvent or diluent has a boiling point at atmospheric pressure in the range from 175 to 250° C., pa... | 04/22/2003 |
| 6531601 | Molded catalyst for production of triethylenediamine, method for its production, and method for producing triethylenediamine A molded catalyst for production of triethylenediamine, wherein (1) the main components are silica and crystalline aluminosilicate, (2) the silica is amorphous, and the content of the silica is from 5 to 70 wt %, (3) the molar ratio of silica to alumina i... | 03/11/2003 |
| 6350874 | Method for producing triethylenediamines and piperazines A method for producing triethylenediamines and piperazines, which comprises contacting an amine compound having a group of the formula (1): ##STR1## wherein each of R1 to R4 which are independent of one another, is a hydrogen atom or... | 02/26/2002 |
| 6316621 | Triethylenediamine production using phosphate catalysts A new method of making phosphate-based catalysts by mixing phosphoric acid with a substantially water insoluble alkaline earth metal salt such that the phosphorus to alkaline earth metal molar ratio is less than 1. The product, containing alkaline earth m... | 11/13/2001 |
| 6084096 | Triethylenediamine and piperazine synthesis using zeolite catalysts modified with a silicon-containing compound A process for preparing triethylenediamine and piperazine by passing an ethanolamine, ethyleneamine, piperazine or morpholine over a pentasil-type zeolite at elevated temperature characterized by employing a ZSM-5 zeolite in the hydrogen or ammonium form ... | 07/04/2000 |
| 6057321 | 1,4-diazabicyclo [2.2.2] oct-2-ylmethyl derivatives, their preparation and therapeutic application The invention concerns compounds of general formula (I) ##STR1## in which R1 represents a methyl group, X1 represents a hydrogen atom, or OR1 and X1 together form a group of formula --O(CH2)... | 05/02/2000 |
| 5756741 | Process for the production of triethylenediamine A process for preparing triethylenediamine by passing an amine compound over a catalyst at elevated temperature to afford a reaction product containing triethylenediamine and piperazine, the amine compound having, in the molecule, a moiety represented by ... | 05/26/1998 |
| 5741906 | Production of triethylenediamine using surface acidity deactivated zeolite catalysts A process for preparing triethylenediamine by passing an ethanolamine, ethyleneamine, piperazine or morpholine over a pentasil-type zeolite at elevated temperature characterized by employing a ZSM-5 zeolite in the hydrogen or ammonium form which has been ... | 04/21/1998 |
| 5731449 | Triethylendiamine synthesis with base-treated zeolites as catalysts A process for preparing triethylenediamine by passing an ethanolamine, ethyleneamine, piperaziHe or morpholine over a pentasil-type zeolite at elevated temperature characterized by employing a ZSM-5 zeolite in the hydrogen or ammonium form which has been ... | 03/24/1998 |
| 5631372 | Process for the manufacture of 1-substituted-4-fluoro-1,4-diazoniabicyclo[2.] octane salts A process for producing 1-substituted-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane salts having the formula ##STR1## wherein the Z substituent is OH, OR, OC(O)R, SO3, SO2 R, NO2, NO, or PO(OR)2, wherein R... | 05/20/1997 |
| 5606084 | Process of fluorinating organic compounds with 1-substituted-4-fluoro-1,4-diazoniabicyclo octane salts The present invention relates to the preparation and uses of 1-substituted-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane salts, specifically 1-hydroxyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane salts as reagents for the introduction of fluorine in organic com... | 02/25/1997 |
| 5472984 | 1,2-ethanediol derivative and salt thereof and cerebral function-improving agent comprising the same This invention relates to a 1,2-ethanediol derivative and a salt thereof, a process for producing the same, and a cerebral function-improving agent comprising the same. The cerebral function-improving agent of this invention is useful for treating cerebro... | 12/05/1995 |
| 5288909 | Catalytic reforming of alkyleneamines A process of reforming an alkyleneamine feedstock or a mixture of such feedstocks to an alkyleneamine or a mixture of alkyleneamines which is different from the feedstock or feedstock mixture. The process is catalyzed by one of the following: Group VB met... | 02/22/1994 |
| 5280120 | Catalytic processes for the preparation triethylenediamine A process for preparing bridged nitrogen-containing compounds which comprises contacting a carboxylated cyclic nitrogen-containing compound with a mixed metal oxide catalyst under conditions effective to produce the bridged nitrogen-containing compound.... | 01/18/1994 |
| 5210306 | Promoted amines catalysis This invention relates to a process for making amines by condensing an amino compound in the presence of a condensation catalyst and a condensation catalyst promoter, wherein said condensation catalyst promoter is present in an amount sufficient to promot... | 05/11/1993 |
| 5210307 | Catalytic reforming of alkyleneamines to linearly-extended polyalkylenepolyamines A process for reforming alkyleneamines to predominantly linearly-extended polyalkylenepolyamines comprising contacting an alkyleneamine or mixture thereof with a catalyst under conditions such that a mixture of polyalkylenepolyamines enriched in linearly-... | 05/11/1993 |
| 5194613 | Catalytic processes for the preparation of bridged nitrogen-containing compounds A process for preparing bridged nitrogen-containing compounds which comprises contacting a carboxylated cyclic nitrogen-containing compound with a mixed metal oxide catalyst under conditions effective to produce the bridged nitrogen-containing compound.... | 03/16/1993 |
| 5164497 | Decarboxylation processes using mixed metal oxide catalysts A decarboxylation process which comprises contacting a carboxylated compound with a metal oxide catalyst under conditions effective to decarboxylate the carboxylated compound.... | 11/17/1992 |
| 5162531 | Mixed metal oxide catalytic process for the preparation of triethylenediamines A process for preparing bridged nitrogen-containing compounds which comprises contacting a cyclic nitrogen-containing compound reactant with a mixed metal oxide catalyst under conditions effective to produce the bridged nitrogen-containing compound.... | 11/10/1992 |
| 5118850 | Catalytic reforming of alkyleneamines to linearly-extended polyalkylenepolyamines A process for reforming alkyleneamines to predominantly linearly-extended polyalkylenepolyamines comprising contacting an alkyleneamine or mixture thereof with a catalyst under conditions such that a mixture of polyalkylenepolyamines enriched in linearly-... | 06/02/1992 |
| 5041548 | Method for the preparation of triethylene diamines Triethylene diamines are prepared in a high yield with an amine compound having a specific group as the starting material by bringing the same into contact with a catalyst formed of a crystalline metal silicate of which the molar ratio (SiO2 /M... | 08/20/1991 |
| 5037838 | Method for the manufacture of triethylenediamine using a pelleted titania-supported tungstopyrophosphate catalyst N-hydroxyethyl piperazine is converted to triethylenediamine using a titania-supported tungstopyrophosphate catalyst.... | 08/06/1991 |
| 5011999 | Process of preparing non-cyclic polyalkylenepolyamines employing group VB metal catalysts A process for the preparation of predominantly non-cyclic polyalkylenepolyamines comprising contacting a difunctional aliphatic alcohol with ammonia or a primary or secondary aliphatic amine in the presence of a catalyst selected from the group consisting... | 04/30/1991 |
| 4970307 | Process for formation of base and light-sensitive material A process for formation of a base from a base precursor, which comprises decomposing the base precursor in the presence of a catalyst. The base precursor has the following formula (I) or (II): (R1 --C.tbd.C--CO2 H)x .multidot.B... | 11/13/1990 |
