WO1997045396A1 - N-bis- or n-tris-[(1,2-dicarboxy-ethoxy)-ethyl]-amine derivatives and preparation and use of the same - Google Patents

N-bis- or n-tris-[(1,2-dicarboxy-ethoxy)-ethyl]-amine derivatives and preparation and use of the same Download PDF

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Publication number
WO1997045396A1
WO1997045396A1 PCT/FI1997/000332 FI9700332W WO9745396A1 WO 1997045396 A1 WO1997045396 A1 WO 1997045396A1 FI 9700332 W FI9700332 W FI 9700332W WO 9745396 A1 WO9745396 A1 WO 9745396A1
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Prior art keywords
alkali metal
formula
compounds
earth
compound
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PCT/FI1997/000332
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English (en)
French (fr)
Inventor
Reijo Aksela
Ilkka Renvall
Aarto Paren
Original Assignee
Kemira Chemicals Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kemira Chemicals Oy filed Critical Kemira Chemicals Oy
Priority to CA002256559A priority Critical patent/CA2256559C/en
Priority to EP97924047A priority patent/EP0904263B1/en
Priority to DE69703796T priority patent/DE69703796T2/de
Priority to AU29643/97A priority patent/AU2964397A/en
Priority to JP54169397A priority patent/JP3901735B2/ja
Priority to AT97924047T priority patent/ATE198316T1/de
Priority to BR9709393A priority patent/BR9709393A/pt
Priority to US09/194,310 priority patent/US6093849A/en
Publication of WO1997045396A1 publication Critical patent/WO1997045396A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/26—Organic compounds containing nitrogen
    • C11D3/33—Amino carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
    • C01B15/01—Hydrogen peroxide
    • C01B15/037—Stabilisation by additives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C217/00—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton
    • C07C217/02—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton
    • C07C217/04—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C217/06—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one etherified hydroxy group and one amino group bound to the carbon skeleton, which is not further substituted
    • C07C217/08—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one etherified hydroxy group and one amino group bound to the carbon skeleton, which is not further substituted the oxygen atom of the etherified hydroxy group being further bound to an acyclic carbon atom
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
    • C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
    • C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C229/24—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having more than one carboxyl group bound to the carbon skeleton, e.g. aspartic acid
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents

Definitions

  • the invention relates to novel N-bis- or N-i ⁇ is-[(l,2-dicarboxy-emoxy-(emyl]-amine derivatives and to the preparation and use of the same.
  • R2 is hydrogen, an alkali metal or an earth alkali metal.
  • EDTA emylenediaminetetraacetic acid
  • DTPA diemylenetriaminepentaacetic acid
  • Patent applications FI-960758, FI-960757, FI-960756 and FI-960755 disclose the use of aspartic acid derivatives as chelating agents in bleaching of pulp.
  • Such chelating agents include ethylenediaminedisuccinic acid (EDDS) and its earth-alkali salts, as well as N,N'-iminodisucciruc acid (ISA) and its earth-alkali salts.
  • EDDS and ISA are effective chelating agents of heavy metals. In addition, they are biodegradable.
  • Chelating agents should contain as small an amount as possible of nitrogen in order for the nitrogen load in waste waters to be as low as possible.
  • Chelating agents of the type of EDDS wherein some of the nitrogen atoms have been replaced with oxygen atoms, are disclosed in JP patent applications 7 120 899 and 7 120 894.
  • the applications disclose the use of various isomers of N-[2-(l,2-dicarboxyethoxy)- ethyl]-aspartic acid (EDODS) in photography chemicals. According to the publica ⁇ tions, EDODS is biodegradable. A method of preparing EDODS by La3+-catalyzed O-alkylation of maleic acid salts has been described in the literature (J.
  • the object was to develop an effective chelating agent which would be biodegradable and contain little nitrogen.
  • R is H , or C H . -C H . / CH >.
  • R2 is hydrogen, an alkali metal or an earth-alkali metal.
  • a secondary or tertiary nitrogen atom is as the central atom.
  • the molecular structures contain four or six carboxylic acid groups, which coordinate effectively with heavy metals.
  • the carbon chains are sufficiently long in terms of the formation of advantageous bond angles.
  • Novel compounds according to the invention include N-bis-[(l,2-dicarboxy- emoxy)-e ⁇ yl]-amine (BCEEA), N-tris-[(l,2-dicarboxy-emoxy)-emyl]-amine (TCEEA) and N-bis-[(l,2-dicarboxy-ethoxy)-ethyl]-aspartic acid (BCEEAA), as well as the alkali metal and earth-alkali metal salts of the said compounds, pref ⁇ erably Na + , K + , Ca2+ and Mg 2+ salts.
  • novel amine compounds according to the invention can be prepared by using as the starting material alkali metal or earth-alkali metal salts of maleic acid and diemanolamine or triethanolamine in the presence of a lanthanide or earth-alkali metal catalyst, in accordance with Synthesis Formula 1.
  • Synthesis Formula 1
  • the maleic acid salt which is the intermediate stage in the synthesis can be prepared in an aqueous solution by preferably using, as the starting substances, available starting substances such as maleic acid anhydride and alkali metal or earth-alkali metal compounds
  • Alkali metal compounds suitable for the reaction include lithium hydroxide, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, and lithium carbonate.
  • Earth-alkali metal compounds suitable for the reaction include magnesium hydroxide, magnesium oxide, magnesium carbonate, calcium oxide, calcium hydroxide, and calcium carbonate
  • maleate is an exothermal reaction.
  • maleic anhydride is first added to water, maleic acid is formed.
  • an alkali is added to this solution at a suitable rate, the temperature of the reaction mixture will increase to 80-90 °C, which is a temperature preferable for the performing of the alkylation reaction
  • the amino alcohol most preferably die ⁇ anolamine or t ⁇ ethanolamme, and the lanthanum compound used as the catalyst can thereafter be added rapidly to the alkaline reaction mixture.
  • Lanthanide compounds or their mixtures can be used as the catalyst Likewise, suitable catalysts for O-alkylation include earth-alkali metal compounds such as calcium hydroxide and magnesium hydroxide. Furthermore, nickel compounds can be used as the catalyst. It is preferable to use as the catalyst lanthanum(III) compounds, such as lanthanum(III) nitrate, lanthanum(III) chloride, lanthanum oxide, lanthanum sulfate, and lanthanum octanoate. Likewise, lanthanum compounds which contain optically active ligands can be used as a catalyst in the reaction.
  • lanthanum(III) compounds such as lanthanum(III) nitrate, lanthanum(III) chloride, lanthanum oxide, lanthanum sulfate, and lanthanum octanoate.
  • lanthanum compounds which contain optically active ligands can be used as a catalyst in the reaction.
  • La3+-catalyzed O-alkylation of maleic acid salt with amino alcohols is a useful reaction, since the synthesis is a single-step synthesis and the catalyst can be recycled.
  • the catalyst can be separated from the reaction mixture after the reaction by rendering the reaction mixture acidic by means of mineral acids and by adding oxalic acid to the hot reaction mixture.
  • the pH of the reaction mixture can be adjusted by using hydrochloric acid, sulfuric acid, nitric acid or phosphoric acid, most preferably hydrochloric acid or sulfuric acid.
  • the lanthanum oxalate precipitate formed can be separated from the reaction mixture by filtration.
  • the lanthanum(III) salt used as a catalyst can be separated from the oxalate precipitate by treating the precipitate with nitric acid or hydrochloric acid. After the treatment the catalyst can be reused.
  • the compounds according to the invention are especially well suited for use in alkaline aqueous solutions, such as detergents and cleansing agents. Furthermore, the compounds according to the invention are suited for use in photography chemi ⁇ cals.
  • novel compounds are useful chelating agents in, for example, alkaline aqueous solutions which contain hydrogen peroxide or peroxy compounds.
  • the novel compounds are particularly useful as chelating agents of heavy metals in a pretreatment before the bleaching of cellulose with ozone, hydrogen peroxide or peroxy acids such as performic, peracetic, perpropionic or Caro's acid and combinations of the same.
  • novel compounds do not contain phosphorus and contain very little nitrogen, they load the environment considerably less than do the chelating agents currently used.
  • a disodium maleate solution was prepared by dissolving 29.4 g (0.3 mol) of maleic anhydride in 50 ml of water and by adding 50 g of a 48 % caustic solution (0.6 mol NaOH) to the reaction mixture. During the addition the temperature of the reaction mixture was maintained at 70-90 °C. 17 g (0.05 mol) of lanthanum(III) nitrate, La(N03)3 x 6 H2O, was added to the reaction mixture together with diethanolamine (10.5 g, 0.1 mol). The reaction mixture was stirred at 85 °C under a reflux con ⁇ denser for 48 hours. The reaction mixture was cooled and rendered acidic (pH 1.8) by means of a concentrated sulfuric acid.
  • reaction mixture was reheated to 60 °C, and 10 g of oxalic acid and 50 ml of water were added, the mixture was stirred at 60 °C for 20 minutes, and the formed La(III) oxalate precipi ⁇ tate was removed from the hot solution by filtration. The filtrate was cooled and any precipitate subsequently formed was removed by filtration. From the remaining solution (40 ml), which contained water 54 %, the organic compounds were analyzed as silyl or methyl ester derivatives by means of 13c NMR spectra and a mass spectrometer.
  • BCEEAA and BCEEA were identified from the 13c NMR spectra. Unreacted initial substances were identified on the basis of reference spectra: diethanolamine and maleic acid, as well as oxalic acid used for the precipitation of the catalyst. Malic acid and fumaric acid were formed as byproducts of the reaction; these were also identified on the basis of reference spectra.
  • BCEEA 7.9 diethanolamine 1.2 maleic acid 2.2 malic acid 2.5 oxalic acid 0.3 fumaric acid 2.1 water 54.3
  • the carboxylic acids contained in the reaction mixture were silylated by treating the reaction mixture with a silylation reagent (BSTFA) commonly used in gas chromatography.
  • BSTFA silylation reagent
  • the sample was analyzed by using a gas chromatography - mass spectrometry apparatus.
  • the carboxyhc acid groups in the reaction mixture were esterified into methyl esters by using methanol in a reaction catalyzed with boron trifluoride.
  • the methyl esters of the reaction byproducts and the methyl ester derivative of BCEEAA were identified from a GC-MS spectrum (Table 3).
  • a sample (13.25 g) of the reaction mixture obtained in accordance with what has been presented above was preheated by adding to it 1.16 g of calcium carbonate. Thereupon the sulfate ions present in the sample precipitated as calcium sulfate.
  • the ion exchange resin used was a strong anion exchange resin (Bio-Rad AG1 - X8, 200-400 mesh) in its formiate form.
  • the sample was eluted through an ion exchange column by using an eluent (1000 ml); the formic acid concentration of the eluent was increased gradually so that the formic acid concentration in the eluent ranged from 0 - 2 mol/1.
  • eluent 1000 ml
  • the formic acid concentration of the eluent was increased gradually so that the formic acid concentration in the eluent ranged from 0 - 2 mol/1.
  • one hundred samples of 10-20 ml were collected, and they were analyzed by liquid chromatography. BCEEA and BCEEAA were isolated from the fractions.
  • TCEEA was prepared by the method described in Example 1 by using triemanolamine (1.0 mol) and maleic anhydride (3.4 mol) as the starting substances.
  • TCEEA was identified from the 13C NMR spectrum.
  • the unreacted starting substances were identified on the basis of reference spectra: friemanolamine and maleic acid, as well as oxalic acid used for precipitating the catalyst. Malic acid and fumaric acid were formed as byproducts of the reaction; these were also identified on the basis of reference spectra.
  • the carboxylic acid groups in the reaction mixture were esterified into methyl esters by using methanol in a reaction catalyzed with boron trifluoride.
  • the methyl esters of the reaction byproducts and the methyl ester derivative of TCEEA were identified from a GC-MS spectrum (Table 5). (15), 172 (10), 113 (30), 59 (40)
  • the pulp was washed with the aqueous solution described above.
  • the concentrations of metals in the washing solution were analyzed after the wash.
  • the passing of iron (Fe), manganese (Mn), calcium (Ca) and magnesium (Mg) into the washing waters was thus determined.
  • the passing of iron and manganese into the washing solutions is advantageous in terms of bleaching.
  • the passing of calcium and magnesium into the washing solutions is disadvantageous in terms of bleaching.
  • the pulp was washed with a DTPA solution.
  • the concentrations of the chelating agents and the pH during the wash are indicated in Table 6.
  • the reference agent used was DTPA, which is a commonly used chelating agent of iron and manganese, for example in connection with pulp production.
  • EDDS a chelating agent which has been found to be good in the applicant's previous experiments, was used as an additional reference agent.
  • PAA peroxyacetic acid
  • PAA-delignification Kappa 5.3, viscosity 709 dm3/kg
  • a magnesium maleate solution was prepared by dissolving 29.4 g (0.3 mol) of maleic anhydride in 50 ml of water and by adding to the reaction mixture 35.0 g of magnesium hydroxide (0.3 mol Mg(OH)2) slurried in 70 ml of water. During the adding, the temperature of the reaction mixture was maintained at 70-90 °C. 17 g (0.05 mol) of lanthanum(III) nitrate, La(NO3)3 x 6 H2O was added to the reaction mixture together with diethanolamine (10.5 g, 0.1 mol). The pH of the reaction mixture was adjusted to a pH value of 1 1 by adding a 48 % sodium hydroxide solution.
  • the reaction mixture was stirred at 85 °C under a reflux condenser for 10 hours.
  • the reaction mixture was cooled and was rendered acidic (pH 1.8) by using concentrated sulfuric acid. Thereafter the reaction mixture was reheated to 60 °C, 10 g of oxalic acid and 50 ml of water were added, the mixture was stirred at 60 °C for 20 minutes, and the formed precipitate was removed from the hot solution by filtration.
  • the filtrate was cooled and any precipitate which subsequently formed was removed by filtration. From the remaining solution (42 ml), which contained water 54 %, the organic compounds were analyzed as silyl or methyl ester derivatives by using 13c NMR spectra and a mass spectrometer.
  • BCEEAA and BCEEA were identified from the 13c NMR spectrum.
  • the unreacted starting substances were identified on the basis of reference spectra: diethanolamine and maleic acid. Malic acid and fumaric acid were formed as byproducts of the reaction; these were also identified on the basis of reference spectra.
  • BCEEA 4.5 diethanolamine 7.5 maleic acid 2.3 malic acid 1.3 fumaric acid 0.3

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
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  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
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PCT/FI1997/000332 1996-05-30 1997-05-30 N-bis- or n-tris-[(1,2-dicarboxy-ethoxy)-ethyl]-amine derivatives and preparation and use of the same WO1997045396A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
CA002256559A CA2256559C (en) 1996-05-30 1997-05-30 N-bis- or n-tris-[(1,2-dicarboxy-ethoxy)-ethyl]-amine derivatives and preparation and use of the same
EP97924047A EP0904263B1 (en) 1996-05-30 1997-05-30 N-bis- or n-tris-[(1,2-dicarboxy-ethoxy)-ethyl]-amine derivatives and preparation and use of the same
DE69703796T DE69703796T2 (de) 1996-05-30 1997-05-30 N-bis- oder n-tris-[(1,2-dicarboxy-ethoxy)-ethyl]-amin-derivate und herstellung und anwendung derselben
AU29643/97A AU2964397A (en) 1996-05-30 1997-05-30 N-bis- or n-tris-{(1,2-dicarboxy-ethoxy)-ethyl}-amine derivatives and preparation and use of the same
JP54169397A JP3901735B2 (ja) 1996-05-30 1997-05-30 Ｎ―ビス―またはｎ―トリス〔（１，２―ジカルボキシエトキシ）エチル〕アミン誘導体およびそれらの製造および用途
AT97924047T ATE198316T1 (de) 1996-05-30 1997-05-30 N-bis- oder n-tris-((1,2-dicarboxy-ethoxy)-ethyl)-amin-deri ate und herstellung und anwendung derselben
BR9709393A BR9709393A (pt) 1996-05-30 1997-05-30 Derivados de n-bis ou n-tris-[(1,2-dicarbóxietóxi)etil] amina e preparação e uso dos mesmos
US09/194,310 US6093849A (en) 1996-05-30 1997-05-30 N-bis- or N-tris-[(1,2-dicarboxy-ethoxy)-ethyl]-amine derivatives and preparation and use of the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI962261A FI112075B (fi) 1996-05-30 1996-05-30 N-bis- tai N-tris-[(1,2-dikarboksyyli-etoksi)-etyyli]amiinijohdannaiset, niiden valmistus ja käyttö
FI962261 1996-05-30

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US (1) US6093849A (fi)
EP (1) EP0904263B1 (fi)
JP (1) JP3901735B2 (fi)
CN (1) CN1158243C (fi)
AT (1) ATE198316T1 (fi)
AU (1) AU2964397A (fi)
BR (1) BR9709393A (fi)
CA (1) CA2256559C (fi)
DE (1) DE69703796T2 (fi)
ES (1) ES2154902T3 (fi)
FI (1) FI112075B (fi)
PT (1) PT904263E (fi)
WO (1) WO1997045396A1 (fi)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999046234A1 (en) * 1998-03-09 1999-09-16 Kemira Chemicals Oy Methods for the preparation of an n-bis-[2-(1,2-dicarboxy-ethoxy)-ethyl]amine derivative and products of the methods and their uses
EP1086944A2 (en) * 1999-09-03 2001-03-28 Nippon Shokubai Co., Ltd. Amino acid derivative composition and process for producing an amino acid derivative
JP2001192362A (ja) * 1999-09-03 2001-07-17 Nippon Shokubai Co Ltd アミノ酸誘導体組成物及びアミノ酸誘導体の製造方法
EP1030943B1 (en) * 1997-11-13 2002-02-13 Kemira Chemicals Oy Bleaching of chemical pulp and treatment with a chelating agent
WO2011151517A2 (en) 2010-06-02 2011-12-08 Kemira Oyj Process for the preparation of a mixture of chelating agents
WO2011151519A2 (en) 2010-06-02 2011-12-08 Kemira Oyj Catalyst recovery process
WO2019002685A1 (en) 2017-06-30 2019-01-03 Kemira Oyj PROCESS FOR THE PREPARATION OF A MIXTURE OF CHELATING AGENTS, MIXTURE OF CHELATING AGENTS AND METHODS OF USE THEREOF
WO2019002684A1 (en) 2017-06-30 2019-01-03 Kemira Oyj PROCESS FOR THE PREPARATION OF A MIXTURE OF CHELATING AGENTS, MIXTURE OF CHELATING AGENTS AND METHODS OF USE THEREOF

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US9745504B2 (en) 2013-03-21 2017-08-29 Halliburton Energy Services, Inc. Wellbore servicing compositions and methods of making and using same
US9512348B2 (en) 2013-03-28 2016-12-06 Halliburton Energy Services, Inc. Removal of inorganic deposition from high temperature formations with non-corrosive acidic pH fluids
SI2902544T1 (sl) * 2014-01-30 2017-09-29 Archroma France Sas Vodni sestavek, ki obsega polivalentno kovino, ki tvori komplekse s kabonatnimi ligandi in ligandi karboksilne kisline, ter njegova uporaba
CN106905171B (zh) * 2017-03-31 2018-12-11 浙江大学 2-[2-叔丁氧基乙氧基]-乙胺的制备方法

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EP0532003A1 (en) * 1991-09-11 1993-03-17 Konica Corporation Processing solution for silver halide color photographic light-sensitive material

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1030943B1 (en) * 1997-11-13 2002-02-13 Kemira Chemicals Oy Bleaching of chemical pulp and treatment with a chelating agent
WO1999046234A1 (en) * 1998-03-09 1999-09-16 Kemira Chemicals Oy Methods for the preparation of an n-bis-[2-(1,2-dicarboxy-ethoxy)-ethyl]amine derivative and products of the methods and their uses
US6590120B1 (en) 1998-03-09 2003-07-08 Kemira Chemicals Oy Methods for the preparation of an N-bis-[2-(1,2-dicarboxy-ethoxy)-ethyl]amine derivative and products of the methods and their uses
EP1086944A2 (en) * 1999-09-03 2001-03-28 Nippon Shokubai Co., Ltd. Amino acid derivative composition and process for producing an amino acid derivative
EP1086944A3 (en) * 1999-09-03 2001-04-11 Nippon Shokubai Co., Ltd. Amino acid derivative composition and process for producing an amino acid derivative
JP2001192362A (ja) * 1999-09-03 2001-07-17 Nippon Shokubai Co Ltd アミノ酸誘導体組成物及びアミノ酸誘導体の製造方法
US6504054B1 (en) 1999-09-03 2003-01-07 Nippon Shokubai Co., Ltd. Amino acid derivative and producing method thereof
JP4632500B2 (ja) * 1999-09-03 2011-02-16 株式会社日本触媒 アミノ酸誘導体組成物及びアミノ酸誘導体の製造方法
WO2011151517A2 (en) 2010-06-02 2011-12-08 Kemira Oyj Process for the preparation of a mixture of chelating agents
WO2011151519A2 (en) 2010-06-02 2011-12-08 Kemira Oyj Catalyst recovery process
WO2011151519A3 (en) * 2010-06-02 2012-03-15 Kemira Oyj Catalyst recovery process
WO2011151517A3 (en) * 2010-06-02 2012-03-22 Kemira Oyj Process for the preparation of a mixture of chelating agents
US9061276B2 (en) 2010-06-02 2015-06-23 Kemira Oyj Catalyst recovery process
RU2554950C2 (ru) * 2010-06-02 2015-07-10 Кемира Ойй Способ регенерации катализатора
US9090536B2 (en) 2010-06-02 2015-07-28 Kemira Oyj Process for the preparation of a mixture of chelating agents
WO2019002685A1 (en) 2017-06-30 2019-01-03 Kemira Oyj PROCESS FOR THE PREPARATION OF A MIXTURE OF CHELATING AGENTS, MIXTURE OF CHELATING AGENTS AND METHODS OF USE THEREOF
WO2019002684A1 (en) 2017-06-30 2019-01-03 Kemira Oyj PROCESS FOR THE PREPARATION OF A MIXTURE OF CHELATING AGENTS, MIXTURE OF CHELATING AGENTS AND METHODS OF USE THEREOF
RU2761831C2 (ru) * 2017-06-30 2021-12-13 Кемира Ойй Способ получения смеси хелатообразующих агентов, смесь хелатообразующих агентов и способы ее применения
US11225456B2 (en) 2017-06-30 2022-01-18 Kemira Oyj Process for the preparation of a mixture of chelating agents, mixture of chelating agents and methods of using them

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CN1158243C (zh) 2004-07-21
PT904263E (pt) 2001-04-30
AU2964397A (en) 1998-01-05
US6093849A (en) 2000-07-25
FI112075B (fi) 2003-10-31
JP2000515121A (ja) 2000-11-14
DE69703796D1 (de) 2001-02-01
CN1220659A (zh) 1999-06-23
FI962261A (fi) 1997-12-01
BR9709393A (pt) 1999-08-10
CA2256559A1 (en) 1997-12-04
EP0904263B1 (en) 2000-12-27
FI962261A0 (fi) 1996-05-30
DE69703796T2 (de) 2001-04-19
CA2256559C (en) 2006-05-02
ATE198316T1 (de) 2001-01-15
EP0904263A1 (en) 1999-03-31
ES2154902T3 (es) 2001-04-16
JP3901735B2 (ja) 2007-04-04

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