EP1928816A1 - Procede de production de xylylenediamine - Google Patents

Procede de production de xylylenediamine

Info

Publication number
EP1928816A1
EP1928816A1 EP06793495A EP06793495A EP1928816A1 EP 1928816 A1 EP1928816 A1 EP 1928816A1 EP 06793495 A EP06793495 A EP 06793495A EP 06793495 A EP06793495 A EP 06793495A EP 1928816 A1 EP1928816 A1 EP 1928816A1
Authority
EP
European Patent Office
Prior art keywords
hydrogenation
xylylenediamine
range
weight
phthalonitrile
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP06793495A
Other languages
German (de)
English (en)
Inventor
Kirsten Dahmen
Sabine Huber
Randolf Hugo
Johann-Peter Melder
Thomas Preiss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP1928816A1 publication Critical patent/EP1928816A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/44—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers
    • C07C209/48—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of nitriles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C211/00—Compounds containing amino groups bound to a carbon skeleton
    • C07C211/01—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms
    • C07C211/26—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms of an unsaturated carbon skeleton containing at least one six-membered aromatic ring
    • C07C211/27—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms of an unsaturated carbon skeleton containing at least one six-membered aromatic ring having amino groups linked to the six-membered aromatic ring by saturated carbon chains

Definitions

  • the present invention relates to a process for the preparation of xylylenediamine by hydrogenation of phthalonitrile in the presence of a heterogeneous catalyst.
  • Xylylenediamine bis (aminomethyl) benzene
  • Xylylenediamine is a useful starting material, e.g. for the synthesis of polyamides, epoxy hardeners or as an intermediate for the preparation of isocyanates.
  • xylylenediamine includes the three isomers ortho-xylylenediamine, meta-xylylenediamine (MXDA) and para-xylylenediamine.
  • the phthalonitriles are solids (for example, melts isophthalonitrile (IPN) at 161 0 C) and have relatively poor solubilities in organic solvents.
  • EP-A1-1 209 146 (BASF AG) relates to a process for the hydrogenation of nitriles to primary amines on specific Raney catalysts.
  • the solvents mentioned are alcohols, amines, amides such as NMP and dimethylformamide (DMF), ethers and esters.
  • WO-A-98/09947 (Du Pont) describes the hydrogenation of 2-methylglutaronitrile in the presence of many possible solvents, i.a. NMP (see claim 2).
  • a disadvantage of the use of methanol is that methylated XDA occurs as a byproduct.
  • CN-A-1 285 343 (Derwent Abstract WP2001317563) (China Petrochem Corp.) describes the use of amines as solvents for the hydrogenation of PDN.
  • US-A-4,482,741 (UOP) describes the use of MXDA as a solvent.
  • MXDA solubility of IPDN at 70 ° C is about 20 wt .-%.
  • this requires high purification streams of the MXDA.
  • a 20% solution of IPDN in pure MXDA requires ⁇ times the cleaning capacity than would be required to purify the formed product alone. The investment and operating costs are correspondingly higher.
  • EP-A-538 865 and US 4,247,478 teach the use of ethers such as dioxane, THF and diglyme as solvents for the hydrogenation of PDN.
  • EP-A2-1 193 247 and EP-A1-1 279 661 (both Mitsubishi Gas Chem. Comp.) Relate to a process for the purification of isophthalonitrile (IPDN) and a process for the preparation of pure XDA.
  • IPDN isophthalonitrile
  • EP-A2-1 193 247 discloses the hydrogenation of IPDN in the presence of NH 3 and a solvent (see Figure 1).
  • EP-A1-1 279 661 discloses aromatic hydrocarbons and saturated hydrocarbons as solvents for the hydrogenation (column 7, paragraph [0038]).
  • EP-A2-1 193 244 (Mitsubishi Gas Chem. Comp.) Describes a process for the preparation of XDA by hydrogenation of phthalonitrile which is dissolved in a C 6 -C 12 aromatic hydrocarbon, such as xylene, mesitylene and pseudocumene (columns 5 6, paragraphs [0027] and [0028], column 6, paragraph [0032]).
  • GB-A-852,972 (equivalent: DE-A-1 1 19 285) (BASF AG) discloses the use of ammonia as a solvent in the hydrogenation of PDN.
  • German Patent Application No. 102005036222.2 dated 02.08.05 (BASF AG) relates to a process for the preparation of xylylenediamine by continuous hydrogenation of phthalonitrile on a heterogeneous catalyst in the presence of liquid ammonia in a reactor, wherein a portion of the reactor effluent as liquid recycle stream continuously recycled to the reactor inlet is (circulating), in which by means of a mixer phthalonitrile as a melt or in solid form with a stream of liquid ammonia (stream a) and another stream which is at least partially withdrawn from the recycle stream to the hydrogenation reactor, (stream b) or a mixture of the streams a and b is mixed and the resulting liquid mixture is driven into the hydrogenation reactor.
  • a mixer phthalonitrile as a melt or in solid form with a stream of liquid ammonia (stream a) and another stream which is at least partially withdrawn from the recycle stream to the hydrogenation reactor, (stream b) or a mixture of the streams a and
  • the addition of nitrile or its solution in the hydrogenation reactor should be at moderate temperatures (eg ⁇ 80 ° C) or pressures (eg ⁇ 6 bar) can take place and the distillation effort should be kept as low as possible, so that the production of XDA in existing Equipment or standard equipment can be carried out so that no investment is needed.
  • a process for the preparation of o-, m- or p-xylylenediamine by hydrogenation of o-, m- or p-phthalodinitrile was found in the presence of a heterogeneous catalyst, which is characterized in that a solution of the Phthodoinitrils in the corresponding isomer of crude xylylenediamine is fed to the hydrogenation reactor, wherein the crude xylylenediamine has a purity in the range of 85 to 99.7 wt .-% and a content of high boilers in the range of 0.3 to 15 wt .-%.
  • a solution of the phthalonitrile in the corresponding isomer of crude xylylenediamine is moved into the hydrogenation reactor, the crude xylylenediamine having a purity in the range from 89 to 99.5% by weight, in particular in the range from 92 to 99.2% by weight, and a content of high boilers in the range of 0.5 to 11 wt .-%, in particular in the range of 0.8 to 8 wt .-%, having.
  • the high boilers are, for example, amides, amidines, bis-XDA (XDA dimers), and further oligomers, for example according to the following formulas:
  • R -CH 2 NH 2 , -CN, -CONH 2 , -CH 2 NHCH 2 -AfyI, -C (NH) NCH 2 -aryl, -CHFCH 2 -aryl
  • Amidines e.g.
  • R, R '(independently of each other) -CH 2 NH 2 , -CN, -CONH 2 , -CH 2 NHCH 2 -aryl, -C (NH) NCH 2 -aryl, -CHFCH 2 -aryl
  • Bis-XDA e.g. BisMXDA
  • the crude xylylenediamine used as solvent preferably has a content of low-boiling components, such as benzylamine and / or N-methylbenzylamine, in the range from 0.01 to 2% by weight, in particular in the range from 0.01 to 1% by weight. , (each without ammonia) and a content of ammonia in the range of 0 to 5 wt .-%, especially in the range of 0 to 2 wt .-%, on.
  • high boilers are meant components which, under the same conditions, have a higher boiling point than the respective xylylenediamine.
  • low boilers are meant components which have a lower boiling point than the respective xylylenediamine under the same conditions.
  • the process according to the invention preferably finds application for the preparation of meta-xylylenediamine (MXDA) by hydrogenation of isophthalonitrile (IPDN).
  • MXDA meta-xylylenediamine
  • IPDN isophthalonitrile
  • MXDA is suitable as a solvent for IPDN. Due to the poor solubility (e.g., 15% by weight at 60 ° C), high distillation capacities are required. According to the invention, it was recognized that the use of the obtained crude MXDA (reaction discharge after removal of the ammonia optionally used in the reaction), the distillation streams can be greatly reduced (almost the same amount as used IPDN as feed stream for purifying).
  • the reaction effluent contains reaction by-products (e.g., benzylamine, methylbenzylamine, methylated MXDA, amides, amidines, bis-MXDA, other high boilers) and optionally residual ammonia.
  • the PDN used in the process as starting material can be synthesized in a previous stage by ammoxidation of the corresponding xylene isomer.
  • Such synthesis methods are e.g. in BASF patent applications EP-A-767 165, EP-A-699 476, EP-A-222 249, DE-A-35 40 517 and DE-A-37 00 710, in the aforementioned applications EP-A2 1 193 247, EP-A1-1 279 661 and EP-A2-1 193 244 (all Mitsubishi Gas Chem. Comp.) And in the above-mentioned BASF patent applications for the preparation of XDA described.
  • the PDN is solved in raw XDA.
  • This can e.g. separately, i. in an upstream step, in a discontinuously, semicontinuously or continuously operated vessel or stirred tank, optionally with external pumped circulation, or other suitable mixing or dissolving device.
  • the dissolution process at elevated temperature e.g. at 40 to 120 ° C, preferably at 50 to 80 ° C, more preferably at 55 to 70 ° C, take place.
  • the heat can be supplied via double jacket, coils, external heat exchanger or other suitable means for heat transfer device.
  • the dissolution process is preferably carried out at an absolute pressure in the range of 1 to 20 bar, preferably 1 to 6 bar.
  • the accumulation of larger amounts of by-products can be controlled by regular continuous discharge of crude XDA, eg crude MXDA. It is advantageous to correlate the amount of discharged material with the amount of PDN used, eg IPDN. Thus, only at the beginning of a campaign the use of pure XDA, eg MXDA, is necessary. Thus, the distillation streams - off see from these first use amounts - to reduce only the formed XDA. In the other case, ie when pure XDA is used instead of the crude XDA for dissolving the PDN, the use of an eg -15% by weight solution would produce 7 times the amount of XDA to be distilled.
  • the solution is particularly preferably ammonia, preferably in liquid form, added.
  • the weight ratio in the fresh feed of dinitrile to ammonia is in this case generally 1: 0.15 to 1:15, preferably 1: 0.5 to 1:10, in particular 1: 1 to 1: 5.
  • the catalysts and reactors known to those skilled in the art for this reaction e.g., fixed bed or suspension mode
  • processes continuous, semi-batch, batch
  • the hydrogenation reactor can be run in straight passage.
  • a circulation procedure is possible, in which part of the reactor discharge is returned to the reactor inlet.
  • an optimal dilution of the reaction solution can be achieved, which has a favorable effect on the selectivity.
  • the circulation stream can be cooled by means of an external heat exchanger in a simple and cost-effective manner, and thus the heat of reaction can be dissipated.
  • the reactor can also be operated adiabatically, wherein the temperature rise of the reaction solution can be limited by the cooled circulation stream. Since the reactor does not have to be cooled in this case, a simple and cost-effective design is possible.
  • An alternative is a cooled tube bundle reactor.
  • the heterogeneous catalysts known in the prior art can be used for the hydrogenation of aromatic nitriles.
  • catalysts which contain cobalt and / or nickel and / or iron as a full catalyst or on an (inert) support.
  • Suitable catalysts are for example Raney nickel, Raney cobalt, Co full contact, titanium-doped cobalt supported (JP-A-2002 205980), Ni on SiO 2 support (WO-A-2000/046179), Co / Ti / Pd on SiO 2 support (CN-A-1 285 343, CN-A-1 285 236) and nickel and / or cobalt on zirconia support (EP-A1-1 262 232).
  • catalysts are the full cobalt contacts disclosed in EP-A1-742 045 (BASF AG), doped with Mn, P, and alkali metal (Li, Na, K, Rb, Cs).
  • the catalytically active composition of these catalysts before reduction with hydrogen from 55 to 98 wt .-%, in particular 75 to 95 wt .-%, cobalt, 0.2 to 15 wt .-% phosphorus, 0.2 to 15 wt. -% manganese and 0.05 to 5 wt .-% alkali metal, especially sodium, each calculated as the oxide.
  • reaction temperatures of the hydrogenation are generally from 40 to 150.degree. C., preferably from 40 to 120.degree.
  • the absolute pressure in the hydrogenation is generally 40 to 250 bar, preferably 100 to 210 bar.
  • the ammonia used is distilled off. If necessary, part of the XDA (preferably the corresponding amount that was added to PDN) is removed and added to the purification. The remaining amount is used again as a solvent.
  • the product (XDA) is additionally extracted with an organic solvent, preferably an aliphatic hydrocarbon, in particular a cycloaliphatic hydrocarbon, very particularly cyclohexane or methylcyclohexane.
  • an organic solvent preferably an aliphatic hydrocarbon, in particular a cycloaliphatic hydrocarbon, very particularly cyclohexane or methylcyclohexane.
  • This purification by extraction may be e.g. according to DE-A-1 074 592 (BASF AG).
  • the hydrogenation of MXDA can be carried out in a plant as shown in Figure 1.
  • MXDA or crude MXDA (stream [2]) is placed in a stirred tank and heated.
  • IPDN stream [1] is fed in with stirring.
  • a 15% solution of IPDN in MXDA is obtained.
  • This solution (stream [3]) is then mixed continuously with ammonia (stream [4]) and preheated together with fresh hydrogen (stream [5]) and possibly hydrogen peroxide (stream [9]) in the heat exchanger W 300 and the hydrogenation reactor C. 300 closed.
  • the catalytic hydrogenation to MXDA, with load and temperature are adjusted so that full conversion is achieved.
  • the reaction is cooled and separated from the gas in the high pressure separator B 301.
  • the gas is circulated by means of compressor V 300 (stream [9]) and a part is discharged (stream [12]) to avoid accumulation of inert gases.
  • the liquid phase from B 301 can partly be circulated (stream [6]) or completely fed to the pressure distillation in K 300, in which ammonia is recovered in liquid form (stream [12]) and again in place of fresh ammonia Electricity [4] can be used.
  • Crude MXDA is obtained via the bottom of the K 300 pressure column (stream [13]) which, depending on the distillation conditions, contains only slight traces of ammonia. It can then be used directly and without any further work-up step to dissolve a new batch of IPDN instead of the pure MXDA (stream [2]).
  • a part of the crude MXDA can be fed to the purifying distillation to obtain MXDA with a purity> 99 wt .-%.
  • This pure MXDA can also be used to dissolve IPDN, but crude MXDA is preferably used to minimize the distillation overhead. Examples
  • a sump-mode reactor with a reactor volume of 70 ml was filled with a cobalt full contact (doped with Mn, P, Na), 4 mm strands.
  • a 15% by weight solution (at 60 ° C) of IPDN in MXDA was introduced.
  • Hydrogen and ammonia were also introduced from below. With an hourly feed of 126 g of dinitrile-MXDA solution and 54 g of ammonia per hour, a hydrogen flow of 20 l / h (volume under normal conditions) and a circuit of 3.5 ml / min, was set.
  • the reactor pressure was 190 bar (abs.).
  • the reaction effluent was depressurized to about 14 bar and distilled off at this pressure ammonia, which was used again after condensation.
  • the selectivity based on IPDN used was 93%.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

L'invention concerne un procédé pour produire le composé o-xylylènediamine, m-xylylènediamine, ou p-xylylènediamine, par hydrogénation du composé o-phtalodinitrile, m-phtalodinitrile, ou p-phtalodinitrile, en présence d'un catalyseur hétérogène. Ce procédé est caractérisé en ce qu'il consiste à introduire une solution du composé phtalodinitrile dans l'isomère correspondant de xylylènediamine brute dans le réacteur d'hydrogénation. Selon l'invention, la xylylènediamine brute présente une pureté qui est comprise entre 85 et 99,7 % en poids, et une teneur en éléments à point d'ébullition élevé qui est comprise entre 0,3 et 15 % en poids.
EP06793495A 2005-09-24 2006-09-14 Procede de production de xylylenediamine Withdrawn EP1928816A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005045806A DE102005045806A1 (de) 2005-09-24 2005-09-24 Verfahren zur Herstellung von Xylylendiamin
PCT/EP2006/066342 WO2007033932A1 (fr) 2005-09-24 2006-09-14 Procede de production de xylylenediamine

Publications (1)

Publication Number Publication Date
EP1928816A1 true EP1928816A1 (fr) 2008-06-11

Family

ID=37462875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06793495A Withdrawn EP1928816A1 (fr) 2005-09-24 2006-09-14 Procede de production de xylylenediamine

Country Status (7)

Country Link
US (1) US20080262266A1 (fr)
EP (1) EP1928816A1 (fr)
JP (1) JP2009508909A (fr)
KR (1) KR20080049846A (fr)
CN (1) CN101273006A (fr)
DE (1) DE102005045806A1 (fr)
WO (1) WO2007033932A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8142618B2 (en) 2006-02-01 2012-03-27 Basf Aktiengesellschaft Processes for preparing pure xylylenediamine
CN102179259B (zh) * 2011-03-23 2013-01-16 南通泰禾化工有限公司 用于制备对苯二甲胺的催化剂及其制备方法

Family Cites Families (19)

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US3009957A (en) * 1958-04-02 1961-11-21 Basf Ag Production of xylene diamines
US3069469A (en) * 1958-06-11 1962-12-18 California Research Corp Hydrogenation of aromatic nitriles
US4247478A (en) * 1979-11-16 1981-01-27 Suntech, Inc. Process and catalyst for hydrogenation of aromatic dinitriles
US4482741A (en) * 1984-01-09 1984-11-13 Uop Inc. Preparation of xylylenediamine
DE3540517A1 (de) * 1985-11-15 1987-05-21 Basf Ag Verfahren zur herstellung von aromatischen nitrilen
DE4428595A1 (de) * 1994-08-12 1996-02-15 Basf Ag Für die Ammonoxidation geeignete Trägerkatalysatoren
EP0742045B1 (fr) * 1995-05-09 2001-12-12 Basf Aktiengesellschaft Catalyseurs à base de cobalt
DE19537446A1 (de) * 1995-10-07 1997-04-10 Basf Ag Verfahren zur Herstellung von aromatischen oder heteroaromatischen Nitrilen
WO2000046179A1 (fr) * 1999-02-04 2000-08-10 Sagami Chemical Research Center Procede de production d'amine primaire aromatique par hydrogenation a basse pression de nitrile aromatique
JP4729779B2 (ja) * 2000-09-25 2011-07-20 三菱瓦斯化学株式会社 キシリレンジアミンの製造方法
DE10056840A1 (de) * 2000-11-16 2002-05-23 Basf Ag Verfahren zur Hydrierung von Nitrilen an Raney-Katalysatoren
JP5017756B2 (ja) * 2001-07-16 2012-09-05 三菱瓦斯化学株式会社 高純度メタキシリレンジアミンの製造方法
DE10341612A1 (de) * 2003-09-10 2005-04-28 Basf Ag Verfahren zur Herstellung von Xylylendiamin
ATE384037T1 (de) * 2003-09-10 2008-02-15 Basf Ag Verfahren zur herstellung von xylylendiamin durch kontinuierliche hydrierung von flüssigem phthalodinitril
DE502004005718D1 (de) * 2003-09-10 2008-01-24 Basf Ag Verfahren zur herstellung von xylylendiamin durch kontinuierliche hydrierung von flüssigem phthalodinitril
DE10341613A1 (de) * 2003-09-10 2005-04-14 Basf Ag Verfahren zur Herstellung von Xylylendiamin
DE10341614A1 (de) * 2003-09-10 2005-04-28 Basf Ag Verfahren zur Herstellung von Xylylendiamin (XDA)
DE102005003315A1 (de) * 2005-01-24 2006-08-03 Basf Ag Verfahren zur Herstellung eines Xylylendiamins
DE102005008929A1 (de) * 2005-02-24 2006-08-31 Basf Ag Verfahren zur Herstellung eines Xylylendiamins

Non-Patent Citations (1)

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Title
See references of WO2007033932A1 *

Also Published As

Publication number Publication date
JP2009508909A (ja) 2009-03-05
CN101273006A (zh) 2008-09-24
US20080262266A1 (en) 2008-10-23
DE102005045806A1 (de) 2007-03-29
WO2007033932A1 (fr) 2007-03-29
KR20080049846A (ko) 2008-06-04

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