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公开(公告)号：DK166986A
公开(公告)日：1986-10-13
申请号：DK166986
申请日：1986-04-11
Applicant: STAMICARBON
IPC: C07B55/00 , C07B31/00 , C07C67/00 , C07C231/00 , C07C231/12 , C07C231/16 , C07C237/06 , C07C237/30 , C07C241/00 , C07C251/02 , C12P13/04 , C12P13/08 , C12P41/00 , C07C , C12P
Abstract: The invention relates to a process for racemizing an optically active N-benzylidene amino-acid amide, characterized in that a solution of the N-benzylidene amino-acid amide is mixed in a water-miscible organic solvent with at least 0.05 mole strong base per litre solution.The invention further relates to a process for preparing an L-amino acid by enzymatic separation of the corresponding DL-amino-acid amide with an enzyme preparation from Pseudomonas putida, in which process also unconverted D-amino-acid amide is left behind in solution, characterized in that benzaldehyde is added to the solution, during which addition a precipitate of D-N-benzylidene amino-acid amide is being formed, this precipitate is subsequently, after being separated off, dissolved in an acetone-water mixture, 0.08-0.15 mole KOH/litre solution is subsequently added, the resulting solution is stirred for 1-20 hours at 20-60 ¤C, sulphuric acid is then added until the pH of the solution is 5 and the resulting sulphuric acid salt of the DL-amino-acid amide is finally, after isolation at pH 8-10, converted into the DL-amino-acid amide and this DL-amino-acid amide is used again.
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公开(公告)号：ZA862746B
公开(公告)日：1986-11-26
申请号：ZA862746
申请日：1986-04-11
Applicant: STAMICARBON
IPC: C07B55/00 , C07B31/00 , C07C67/00 , C07C231/00 , C07C231/12 , C07C231/16 , C07C237/06 , C07C237/30 , C07C241/00 , C07C251/02 , C12P13/04 , C12P13/08 , C12P41/00 , C12P
Abstract: The invention relates to a process for racemizing an optically active N-benzylidene amino-acid amide, characterized in that a solution of the N-benzylidene amino-acid amide is mixed in a water-miscible organic solvent with at least 0.05 mole strong base per litre solution.The invention further relates to a process for preparing an L-amino acid by enzymatic separation of the corresponding DL-amino-acid amide with an enzyme preparation from Pseudomonas putida, in which process also unconverted D-amino-acid amide is left behind in solution, characterized in that benzaldehyde is added to the solution, during which addition a precipitate of D-N-benzylidene amino-acid amide is being formed, this precipitate is subsequently, after being separated off, dissolved in an acetone-water mixture, 0.08-0.15 mole KOH/litre solution is subsequently added, the resulting solution is stirred for 1-20 hours at 20-60 ¤C, sulphuric acid is then added until the pH of the solution is 5 and the resulting sulphuric acid salt of the DL-amino-acid amide is finally, after isolation at pH 8-10, converted into the DL-amino-acid amide and this DL-amino-acid amide is used again.
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公开(公告)号：DE3668883D1
公开(公告)日：1990-03-15
申请号：DE3668883
申请日：1986-04-10
Applicant: STAMICARBON
IPC: C07B55/00 , C07B31/00 , C07C67/00 , C07C231/00 , C07C231/12 , C07C231/16 , C07C237/06 , C07C237/30 , C07C241/00 , C07C251/02 , C12P13/04 , C12P13/08 , C12P41/00
Abstract: The invention relates to a process for racemizing an optically active N-benzylidene amino-acid amide, characterized in that a solution of the N-benzylidene amino-acid amide is mixed in a water-miscible organic solvent with at least 0.05 mole strong base per litre solution.The invention further relates to a process for preparing an L-amino acid by enzymatic separation of the corresponding DL-amino-acid amide with an enzyme preparation from Pseudomonas putida, in which process also unconverted D-amino-acid amide is left behind in solution, characterized in that benzaldehyde is added to the solution, during which addition a precipitate of D-N-benzylidene amino-acid amide is being formed, this precipitate is subsequently, after being separated off, dissolved in an acetone-water mixture, 0.08-0.15 mole KOH/litre solution is subsequently added, the resulting solution is stirred for 1-20 hours at 20-60 ¤C, sulphuric acid is then added until the pH of the solution is 5 and the resulting sulphuric acid salt of the DL-amino-acid amide is finally, after isolation at pH 8-10, converted into the DL-amino-acid amide and this DL-amino-acid amide is used again.
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公开(公告)号：ZA8602746B
公开(公告)日：1986-11-26
申请号：ZA8602746
申请日：1986-04-11
Applicant: STAMICARBON
IPC: C07B55/00 , C07B31/00 , C07C67/00 , C07C231/00 , C07C231/12 , C07C231/16 , C07C237/06 , C07C241/00 , C07C251/02 , C12P13/04 , C12P13/08 , C12P41/00 , C12P
CPC classification number: C12P13/04 , C12P13/08 , C12P41/007
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Patent Agency Ranking
公开(公告)号：DE2330604A1
公开(公告)日：1974-01-10
申请号：DE2330604
申请日：1973-06-15
Applicant: STAMICARBON
IPC: C22B3/00 , B01D15/00 , B01D15/04 , B01D53/64 , B01J20/24 , B01J45/00 , C02F1/28 , C02F1/42 , C02F1/52 , C02F1/62 , C09K3/00 , C22B3/24 , B01D11/04
Abstract: 1401891 Removing metals from solutions; gas separation STAMICARBON BV 14 June 1973 [17 June 1972 1 May 1973 17 May 1973] 28383/73 Headings C1A and C1C [Also in Division C3] Metal values are removed from solutions or gaseous mixtures containing them by contacting the solution or mixture with a reduced keratin, a Bunte salt of a keratin or a natural or synthetic polyamide having at least some of the amide groups replaced by thioamide groups, which binds the metal values to the contacting agent. The keratin may be in the form of wool or fowls' feathers and can be converted to the Bunte salt by reaction with an alkali metal or alkaline earth metal sulphite with a tetrathionate as oxidant. The amide groups of a natural or synthetic polyamide can be replaced by thioamide groups by reaction of the polyamide with phosphorus pentasulphide. The process may particularly be applied to aqueous effluents.
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公开(公告)号：AT50241T
公开(公告)日：1990-02-15
申请号：AT86200603
申请日：1986-04-10
Applicant: STAMICARBON
IPC: C07B55/00 , C07B31/00 , C07C67/00 , C07C231/00 , C07C231/12 , C07C231/16 , C07C237/06 , C07C237/30 , C07C241/00 , C07C251/02 , C12P13/04 , C12P13/08 , C12P41/00
Abstract: The invention relates to a process for racemizing an optically active N-benzylidene amino-acid amide, characterized in that a solution of the N-benzylidene amino-acid amide is mixed in a water-miscible organic solvent with at least 0.05 mole strong base per litre solution.The invention further relates to a process for preparing an L-amino acid by enzymatic separation of the corresponding DL-amino-acid amide with an enzyme preparation from Pseudomonas putida, in which process also unconverted D-amino-acid amide is left behind in solution, characterized in that benzaldehyde is added to the solution, during which addition a precipitate of D-N-benzylidene amino-acid amide is being formed, this precipitate is subsequently, after being separated off, dissolved in an acetone-water mixture, 0.08-0.15 mole KOH/litre solution is subsequently added, the resulting solution is stirred for 1-20 hours at 20-60 ¤C, sulphuric acid is then added until the pH of the solution is 5 and the resulting sulphuric acid salt of the DL-amino-acid amide is finally, after isolation at pH 8-10, converted into the DL-amino-acid amide and this DL-amino-acid amide is used again.
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公开(公告)号：BR8601656A
公开(公告)日：1986-12-16
申请号：BR8601656
申请日：1986-04-11
Applicant: STAMICARBON
IPC: C07B55/00 , C07B31/00 , C07C67/00 , C07C231/00 , C07C231/12 , C07C231/16 , C07C237/06 , C07C237/30 , C07C241/00 , C07C251/02 , C12P13/04 , C12P13/08 , C12P41/00 , C07C102/00 , C07C103/28
Abstract: The invention relates to a process for racemizing an optically active N-benzylidene amino-acid amide, characterized in that a solution of the N-benzylidene amino-acid amide is mixed in a water-miscible organic solvent with at least 0.05 mole strong base per litre solution.The invention further relates to a process for preparing an L-amino acid by enzymatic separation of the corresponding DL-amino-acid amide with an enzyme preparation from Pseudomonas putida, in which process also unconverted D-amino-acid amide is left behind in solution, characterized in that benzaldehyde is added to the solution, during which addition a precipitate of D-N-benzylidene amino-acid amide is being formed, this precipitate is subsequently, after being separated off, dissolved in an acetone-water mixture, 0.08-0.15 mole KOH/litre solution is subsequently added, the resulting solution is stirred for 1-20 hours at 20-60 ¤C, sulphuric acid is then added until the pH of the solution is 5 and the resulting sulphuric acid salt of the DL-amino-acid amide is finally, after isolation at pH 8-10, converted into the DL-amino-acid amide and this DL-amino-acid amide is used again.
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公开(公告)号：DK166986D0
公开(公告)日：1986-04-11
申请号：DK166986
申请日：1986-04-11
Applicant: STAMICARBON
IPC: C07B55/00 , C07B31/00 , C07C67/00 , C07C231/00 , C07C231/12 , C07C231/16 , C07C237/06 , C07C237/30 , C07C241/00 , C07C251/02 , C12P13/04 , C12P13/08 , C12P41/00 , C07C , C12P
Abstract: The invention relates to a process for racemizing an optically active N-benzylidene amino-acid amide, characterized in that a solution of the N-benzylidene amino-acid amide is mixed in a water-miscible organic solvent with at least 0.05 mole strong base per litre solution.The invention further relates to a process for preparing an L-amino acid by enzymatic separation of the corresponding DL-amino-acid amide with an enzyme preparation from Pseudomonas putida, in which process also unconverted D-amino-acid amide is left behind in solution, characterized in that benzaldehyde is added to the solution, during which addition a precipitate of D-N-benzylidene amino-acid amide is being formed, this precipitate is subsequently, after being separated off, dissolved in an acetone-water mixture, 0.08-0.15 mole KOH/litre solution is subsequently added, the resulting solution is stirred for 1-20 hours at 20-60 ¤C, sulphuric acid is then added until the pH of the solution is 5 and the resulting sulphuric acid salt of the DL-amino-acid amide is finally, after isolation at pH 8-10, converted into the DL-amino-acid amide and this DL-amino-acid amide is used again.
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公开(公告)号：DE2860355D1
公开(公告)日：1981-03-12
申请号：DE2860355
申请日：1978-06-21
Applicant: STAMICARBON
Inventor： DASSEN BERNARDUS HENRICUS NICO
Abstract: Process for the biological purification of waste water in which a suspension of the surplus sludge formed during the purification is hydrolyzed in a basic medium and at elevated temperatures.
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