Class 564/499 - Separating primary, secondary, or tertiary amines from each other

Subclass of Class 564 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein mixtures of primary, secondary, or tertiary
No. of patents: 37
Last issue date: 12/18/2007

Number	Title	Issue Date
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
7279602	Method for separating triethanolamin from a mixture obtainable by ammonia and ethylene oxide reaction Process for separating triethanolamine continuously by distillation from a mixture of monoethanolamine, diethanolamine and triethanolamine together with ethanolamine ethers and water obtained by reaction of ammonia with ethylene oxide in the liquid phase under super...	10/09/2007
7271292	Process for distillatively removing piperazine from an ethylenediamine-piperazine mixture The invention relates to a process for continuously, distillatively removing piperazine from an ethylenediamine-piperazine mixture under pressure at elevated temperature, by discharging the ethylenediamine at the top and the piperazine at the bottom of a distillatio...	09/18/2007
7164044	Process for producing high purity trialkanolamine A process for producing a high purity trialkanolamine excelling in hue and having an APHA of not more than 40, characterizing by including producing a mixed alkanolamine by the reaction of an alkylene oxide with ammonia; removing low-boiling substances from the mixe...	01/16/2007
6846959	Process for producing alkanolamines A process for producing an alkanolamine includes supplying a reactive distillation apparatus having an inner contacting surface which simultaneously facilitates a reaction process and a distillation process, feeding a first reactant including an amine represented by...	01/25/2005
6683217	Process for manufacturing triethanolamine and product obtained The present invention relates to a continuous process for the manufacture of triethanolamine (TEA) comprising, in succession: (i) a step of synthesizing the TEA by continuously bringing ammonia into contact with ethylene oxide under conditions allowing th...	01/27/2004
6573406	High-purity alkanolamines and their production process High-purity alkanolamines, whose iron content is less than 50 ppb, are provided. Said high-purity alkanolamines can be produced by covering with an alkanolamine-resistant material at least a part of the inner wall of equipment that contacts alkanolamines ...	06/03/2003
6469214	Process for the preparation of ethanolamines A process for the preparation of one or more ethanolamines (I), chosen from the group consisting of monoethanolamine, diethanolamine and triethanolamine, by conversion of one or more ethanolamines (II) different from the ethanolamine(s) (I), chosen from t...	10/22/2002
6388137	Method of purifying triethanolamine Method of purifying triethanolamine prepared by reacting aqueous ammonia with ethylene oxide in the liquid phase under pressure and at elevated temperature by removing excess ammonia, water and monoethanolamine from the reaction product, reacting the resu...	05/14/2002
6353138	Process for purifying aqueous tertiary amine and alkanolamine solutions A process for the removal of primary and secondary amine and alkanolamine impurities from aqueous tertiary amine and alkanolamine solutions without affecting the tertiary amine and/or alkanolamine by treating these solutions with a monoaldehyde or dialdeh...	03/05/2002
6251229	Process for the separation of 2-aminomethylcyclopentylamine from a mixture containing hexamethyldiamine and 2-aminomethylcyclopentylamine A process for separating 2-aminomethylcyclopentylamine from a mixture consisting of hexamethylenediamine and 2-aminomethylcyclopentylamine by distilling the mixture at a pressure from 1 to 300 mbar....	06/26/2001
6011156	Process for removing primary amines from an amine-containing stream A process is provided for removing primary amines from an amine-containing stream. Particularly, a process is provided for removing primary amines from said amine-containing stream by reacting said primary amine with a dione. More particularly, a process ...	01/04/2000
5902903	Process for purifying tertiary fatty alkylmethylamines In the process described, purification and improvement in odor of, in particular, fatty alkyldimethylamines is achieved by exposing, in the liquid phase, the tertiary amine to be treated to a vacuum or an inert gas stream. By means of the process accordin...	05/11/1999
5869696	Universal solid supports and methods for their use Universal solid support oligonucleotide synthesis reagents, oligonucleotide synthesis processes, and reagents for cleaving oligonucleotides from solid supports are disclosed. Oligonucleotide synthesis reagents have the following general formula: SS--R	02/09/1999
5608114	Disproportionating method of trimethylamine Upon subjecting trimethylamine with ammonia and optionally, a methylamine to a disproportioning reaction to reduce the proportion of the trimethylamine, use of a zeolite as a catalyst, said zeolite being mordenite, clinoptilolite or the like at least 80% ...	03/04/1997
5481037	Decontamination of tertiary amines from primary and secondary amines A process for the purification of tertiary amines in a crude mixture contaminated with undesirable primary and secondary amines which may have only a slight variance in boiling point with respect to the tertiary amine, wherein the crude mixture of the ter...	01/02/1996
5424482	Process for preparing color-stable tertiary butyldiethanolamine Tertiary-butyldiethanolamine subject to color deterioration is purified and stabilized against color formation by vacuum distilling said amine at a pressure within the range of 1 to 50 mm.Hg (1-50 torr) in the absence of a reducing agent,...	06/13/1995
5292958	Process for eliminating the diethanolamine present in triethanolamine and preparation process for purified triethanolamine Processes for eliminating the diethanolamine present in triethanolamine and the preparation of triethanolamine or compositions containing triethanolamine substantially free from diethanolamine in which the triethanolamine containing diethanolamine is trea...	03/08/1994
5225597	Selective, high purity preparation of N-monoalkyl alkylenediamines A continuous method of preparing N-monoalkyl alkylenediamines, uncontaminated by the N,N'-dialkyl alkylenediamine, is based on the observation that the disubstituted material selectively precipitates from aqueous media. A scheme is presented where an aque...	07/06/1993
5189221	Amine separation process A mixture of C1 -C4 mono-, di- and trialkylamines is separated by adding at least about an equimolar amount, based on the amine mixture, of a formyldialkanolamine selected from the group consisting of formyldiethanolamine, formyl ami...	02/23/1993
5175369	Separation of methoxyisopropylamine from methoxyisopropylamine-water azeotrope This invention relates to a process for separating methoxyisopropylamine and particularly to an improvement in the process for the recovery of methoxyisopropylamine from the reaction of methoxyisopropanol with ammonia under amination conditions. In this p...	12/29/1992
4868335	Separation of mono-n-hexylamine-water azeotrope This invention relates to a process for separating mono-n-hexylamine from water and particularly to an improvement in a process for the recovery of mono-n-hexylamine from the reaction of n-hexanol with ammonia under amination conditions. In this process w...	09/19/1989
4552957	Method of separating primary amines from tertiary amines using non-polar hydrocarbon solvent with or without polyhydroxylic compound A method for the separation of primary amines such as bis-(2-aminoethyl)ether from tertiary amines such as N-(2-methoxyethyl)morpholine which have close boiling points via extraction using a non-polar hydrocarbon solvent is described. Alternatively, ...	11/12/1985
4552958	Method of separating primary amines from tertiary amines using non-polar hydrocarbon solvent and water A method for the separation of primary amines such as bis-(2-aminoethyl)ether from tertiary amines such as N-(2-methoxyethyl)morpholine which have close boiling points via extraction using a non-polar hydrocarbon solvent and water is described. The w...	11/12/1985
4543411	Process for selective preparation of secondary and tertiary amines Secondary and tertiary amines are selectively prepared by a process comprising reacting an olefin, a nitrogen-containing compound and synthesis gas in the presence of a catalyst system comprising a ruthenium-containing compound mixed with a quaternary oni...	09/24/1985
4543163	Process for recovery of amine from spent acid stripping liquor Disclosed is a process for recovering a virtually water-free amine from an amine acid salt thereof. The process comprises a unique combination of phase separation stages practiced under mild heating and distillation stages. An amine product containing les...	09/24/1985
4532354	Method for purifying N,N-dimethylaminopropylamine The present invention relates to a method for purifying N,N-dimethylaminopropylamine containing 1,3-diaminopropane as an impurity. Dimethylaminopropionitrile is formed by adding dimethylamine to acrylonitrile, and is then converted by subsequent hydrogena...	07/30/1985
4472246	Process for recovery of amine from spent acid stripping liquor Disclosed is a process for recovering a virtually water-free amine from an amine acid salt thereof. The process comprises a unique combination of phase separation stages practiced under mild heating and distillation stages. An amine product containing les...	09/18/1984
4407703	Amine separation process A mixture of isomers of an alkylamine, for example ethylamine is separated into its constituent components by a process in which the mixture is first distilled and at least one pure component separated from the mixture. The remainder of the mixture is the...	10/04/1983
4398041	Process for manufacturing alkylamines A process for converting a C1 -C4 alcohol to a non-equilibrium controlled distribution of mono-, di- and trialkylamines is disclosed. A mixture of the alcohol and ammonia is reacted in a first conversion reactor containing a shape se...	08/09/1983
4387005	Process and apparatus for carrying out the first stage of separation of constituents of a reaction mixture obtained during synthesis of asymmetric dimethylhydrazine by the Raschig method The present invention relates to a process for carrying out the first stage of separation of constituents of a reaction mixture obtained during synthesis of asymmetric dimethylhydrazine by the Raschig method, consisting in sending, into an empty central s...	06/07/1983
4328370	Ammonation of trialkanolamines Lower trialkanolamines such as triethanolamine and triisopropanolamine are converted to the corresponding mono- and dialkanolamine by reacting with ammonia at about 150° C.-275° C. under superatmospheric pressure in the presence of a hydrogenation catal...	05/04/1982
4306068	Process for separating primary and secondary amines A method for separating primary and secondary amines by contacting a mixture thereof with mesityl oxide, which forms acetone and an adduct with the primary amine. Acetone is removed to force the reaction. The reaction is particulary useful for separating ...	12/15/1981
4255356	Purification of tertiary amines using an adsorbent A method of purifying tertiary amines by removing sec. and prim. amines and/or their hydrochlorides produced in the manufacture of the tertiary amines. The impurities are removed by dissolving the impure tertiary amines in an organic solvent and the resul...	03/10/1981
4174351	Separation of dissimilar amines Amines which are dissimilar in nature by virtue of possessing different substituents, different structures or position isomers may be selectively separated by treatment with a reactive carbonyl compound and an acid. The separation may be effected at react...	11/13/1979
4152219	Separation of ethylamines Mono ethylamine and diethylamine are separated together by distillation from mixtures comprising mono-, di- and tri- ethylamine and water, and the mono ethylamine is separated from the diethylamine by a subsequent distillation....	05/01/1979
3933915	Insect repellent compositions and process having an N-substituted hydroxyalkyl amine as an active ingredient Lower hydroxyalkyl amines in which at least one of the amino hydrogens is replaced by an acyclic monoterpenyl radical or hydrogenated acyclic monaterpenyl radical are useful repellents for insect repelling compositions....	01/20/1976

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Class 564/499 - Separating primary, secondary, or tertiary amines from each other