WO2015025774A1 - メタ-キシリレンジアミン類の製造方法およびビスアミド化合物の製造方法 - Google Patents
メタ-キシリレンジアミン類の製造方法およびビスアミド化合物の製造方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
- C07D209/44—Iso-indoles; Hydrogenated iso-indoles
- C07D209/48—Iso-indoles; Hydrogenated iso-indoles with oxygen atoms in positions 1 and 3, e.g. phthalimide
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/62—Preparation of compounds containing amino groups bound to a carbon skeleton by cleaving carbon-to-nitrogen, sulfur-to-nitrogen, or phosphorus-to-nitrogen bonds, e.g. hydrolysis of amides, N-dealkylation of amines or quaternary ammonium compounds
Definitions
- the present invention relates to a method for producing meta-xylylenediamines and a method for producing bisamide compounds.
- metaxylylenediamines are well known as raw materials for polyamides used for fibers, films and the like.
- Metaxylylene diisocyanates derived from such metaxylylene diamines are useful, for example, as a raw material for polyurethane used in paints, adhesives, plastic lenses and the like.
- metaxylene is ammoxidized using a fluid catalyst made of vanadium to produce isophthalonitrile, and the isophthalonitrile is hydrogenated in the presence of a nickel catalyst or the like. It has been proposed (see, for example, Patent Document 1).
- the present invention has been made in view of such problems, and the object thereof is meta-xylylenediamine which does not require high temperature and high pressure (special equipment) and is excellent in equipment, safety and economy. It is in providing the manufacturing method of a kind.
- the method for producing meta-xylylenediamines of the present invention comprises reacting monohalogenated benzenes, formaldehyde, and an amide compound having a primary amide group or a secondary amide group in the presence of an acidic liquid.
- Reaction step dehalogenation step of substituting a halogen atom derived from the monohalogenated benzene with a hydrogen atom, and conversion of a primary amide group or a secondary amide group derived from the amide compound into an amino group
- the acidic liquid contains an inorganic acid, and the equivalent ratio of hydrogen atoms of the inorganic acid to the monohalogenated benzenes exceeds 16, It is characterized in that the concentration of the inorganic acid in the acidic liquid exceeds 80% by mass and the reaction temperature exceeds 40 ° C.
- the amide compound is preferably a phthalimide represented by the following general formula (1).
- R 1 represents a hydrogen atom, a halogen atom or an alkyl group, and R 1 may be the same or different from each other.
- a recovery step of preparing the phthalimides by recovering the phthalic acids released in the deprotection step and then reacting the recovered phthalic acids with ammonia and / or urea.
- the inorganic acid is preferably sulfuric acid.
- the monohalogenated benzene is preferably monochlorobenzene.
- the equivalent ratio of hydrogen atoms of the inorganic acid to the monohalogenated benzenes is 18 or more, the concentration of the inorganic acid in the acidic liquid is 88% by mass or more, and the reaction temperature is 50 It is preferable that the temperature is not lower than ° C.
- the method for producing a bisamide compound of the present invention comprises a reaction step of reacting monohalogenated benzenes, formaldehydes, and an amide compound having a primary amide group or a secondary amide group in the presence of an acidic liquid.
- the acidic liquid contains an inorganic acid
- the equivalent ratio of hydrogen atoms of the inorganic acid to the monohalogenated benzenes exceeds 16, and the inorganic acid in the acidic liquid
- the concentration exceeds 80% by weight and the reaction temperature exceeds 40 ° C.
- Such bisamide compounds can be derived into meta-xylylenediamines by a deprotection step and a dehalogenation step.
- the method for producing meta-xylylenediamines and the method for producing bisamide compounds of the present invention is excellent in equipment, safety and economy, and is safe, low-cost and high-yield bisamide compounds, and thus Meta-xylylenediamines can be produced. Therefore, the present invention can be suitably used as an industrial method for producing meta-xylylenediamines.
- the method for producing meta-xylylenediamines of the present invention includes a reaction step, a dehalogenation step, and a deprotection step, and preferably further includes a recovery step.
- a reaction step a monohalogenated benzene, formaldehyde, and an amide compound having a primary amide group or a secondary amide group are reacted in the presence of an acidic liquid to produce a bisamide compound.
- Monohalogenated benzenes are aromatic compounds in which one of the hydrogen atoms bonded to the benzene ring is substituted with a halogen atom.
- monohalogenated benzenes represented by the following general formula (4)
- monohalogenated benzenes represented by the general formula (5).
- X represents a halogen atom.
- R 2 represents a hydrogen atom, an alkyl group, an amino group, a hydroxyl group or an alkoxy group. R 2 may be the same or different from each other.
- halogen atom represented by X examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- halogen atoms a chlorine atom, a bromine atom and an iodine atom are preferable from the viewpoint of raw material cost, and a chlorine atom is more preferable.
- examples of the alkyl group represented by R 2 include a linear alkyl group having 1 to 12 carbon atoms (for example, a methyl group, an ethyl group, n- A propyl group, an n-butyl group, a pentyl group, a hexyl group, a heptyl group, an n-octyl group, a nonyl group, a decyl group, a dodecyl group, etc.), a branched alkyl group having 1 to 12 carbon atoms (for example, an isopropyl group, Isobutyl group, t-butyl group, isopentyl group, isooctyl group, 2-ethylhexyl group, 2-propylpentyl group, isodecyl group, etc.).
- a linear alkyl group having 1 to 12 carbon atoms for example, a methyl group, an ethyl group,
- the amino group represented by R 2 may be any of primary, secondary and tertiary amino groups.
- the secondary or tertiary amino group include amino groups containing the above alkyl groups.
- examples of the alkoxy group represented by R 2 include an alkoxy group having 1 to 12 carbon atoms (for example, a methoxy group, an ethoxy group, a propoxy group, a butoxy group, etc. ) And the like.
- a hydrogen atom is preferable from the viewpoint of the orientation of monohalogenated benzenes.
- all R 2 are preferably the same.
- monohalogenated benzenes represented by general formula (4) and general formula (5) are identical.
- monochlorobenzene is preferable from the viewpoint of raw material cost and orientation.
- Such monohalogenated benzenes may be used alone or in combination.
- Formaldehydes include, for example, formaldehyde and paraformaldehyde, and paraformaldehyde is preferable from the viewpoint of handleability.
- Paraformaldehyde is a homopolymer obtained by polymerizing only formaldehyde, and is represented by the following general formula (6).
- General formula (6) HO (CH 2 O) n H (6) (In general formula (6), n represents an integer of 2 or more and 100 or less.) In general formula (6), n is preferably 8 or more and 100 or less.
- Such formaldehydes may be used alone or in combination.
- Such formaldehydes are preferably prepared as an aqueous solution from the viewpoint of handleability.
- the concentration of the formaldehyde is, for example, 70% by mass or more, and preferably 80% by mass or more, for example, 100% by mass or less from the viewpoint of reactivity.
- the mixing ratio of formaldehydes is, for example, 1.0 mol or more, preferably 1.2 mol or more, for example 10.0 mol or less, from the viewpoint of the yield of the bisamide compound, relative to 1 mol of monohalogenated benzenes, From the viewpoint of cost, it is preferably 3.0 mol or less.
- the mixing ratio of the formaldehydes is, for example, 30 parts by mass or more, preferably 40 parts by mass or more, for example, 70 parts by mass or less, preferably 60 parts by mass or less, with respect to 100 parts by mass of the monohalogenated benzenes. It is.
- the amide compound having a primary amide group or a secondary amide group is an amide compound having an amide group having at least one NH bond, and includes, for example, an imide compound having an imide group, and a urea having a urea group Examples thereof include a compound and a urethane compound having a urethane group.
- R 1 represents a hydrogen atom, a halogen atom or an alkyl group, and R 1 may be the same or different from each other.
- examples of the halogen atom represented by R 1 include the same halogen atoms as the halogen atom represented by X in the general formula (4).
- examples of the alkyl group represented by R 1 include the same alkyl groups as the alkyl group represented by R 2 in the general formula (4).
- R 1 a hydrogen atom is preferable from the viewpoint of reactivity.
- all R 1 are preferably the same.
- the acidic liquid is a liquid containing an inorganic acid, and is also used as a reaction solvent in the reaction process.
- Such an acidic liquid may be composed of only an inorganic acid, or may be an inorganic acid aqueous solution in which an inorganic acid is dissolved in water.
- the inorganic acid examples include inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, and boric acid.
- a strong acid that is, an acid dissociation constant (PKa (H 2 O )) Is an inorganic acid having 3 or less.
- Specific examples of the strong acid inorganic acid include hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid and the like, and sulfuric acid is preferable from the viewpoint of the yield of the bisamide compound.
- Such inorganic acids may be used alone or in combination.
- the concentration of the inorganic acid in the acidic liquid is more than 80% by mass, preferably 88% by mass or more, for example, 100% from the viewpoint of the yield of the bisamide compound. Preferably, it is 99 mass% or less from the ease of preparation of inorganic acid aqueous solution.
- Such acidic liquids may be used alone or in combination.
- an aqueous sulfuric acid solution is preferable.
- the blending ratio of such an acidic liquid is, for example, 300 parts by mass or more with respect to 100 parts by mass of the monohalogenated benzene, and preferably 700 parts by mass or more, for example, 2000 parts by mass from the viewpoint of the yield of the bisamide compound.
- it is preferably 1100 parts by mass or less.
- the blending ratio of the inorganic acid is, for example, 3 mol or more, preferably 8 mol or more, for example, 15 mol or less, preferably from the viewpoint of cost, with respect to 1 mol of monohalogenated benzenes, 12 mol or less.
- the equivalent ratio (molar equivalent ratio) of hydrogen atoms of the inorganic acid exceeds 16, preferably 18 or more, more preferably, from the viewpoint of the yield of the bisamide compound with respect to the monohalogenated benzenes. 20 or more, for example, 40 or less, and preferably 30 or less from the viewpoint of cost.
- each component monohalogenated benzenes, formaldehydes and amide compounds
- an acidic liquid for example, after dissolving the formaldehydes and amide compounds in an acidic liquid to prepare an aldehyde / amide solution Mix aldehyde / amide solution and monohalogenated benzenes.
- the mixing method of the aldehyde / amide solution and the monohalogenated benzenes is not particularly limited, and examples thereof include a method in which the other is added dropwise to either one, and from the viewpoint of the yield of the bisamide compound, preferably an aldehyde -The method of dripping monohalogenated benzenes to an amide solution is mentioned.
- the temperature is, for example, 0 ° C. or more, preferably 10 ° C. or more, for example, 50 ° C. or less, preferably 35 ° C. or less
- the time required for dropping is, for example, 15 minutes or more, preferably 30 minutes or more, for example, 5 hours or less, preferably 3 hours or less.
- the mixed solution of the aldehyde / amide solution and the monohalogenated benzenes is heated to react the monohalogenated benzenes, formaldehydes and amide compounds.
- the reaction temperature exceeds 40 ° C. from the viewpoint of the yield of the bisamide compound, preferably 50 ° C. or more, more preferably exceeds 50 ° C., and from the viewpoint of equipment and safety, for example, 100 ° C.
- it is preferably 90 ° C. or lower, more preferably 80 ° C. or lower.
- the reaction pressure is not particularly limited and may be any of normal pressure, pressurization, and reduced pressure, and is preferably normal pressure (specifically, 90 kPa to 110 kPa) from the viewpoint of equipment and safety. is there.
- the reaction time is, for example, 1 hour or more, preferably 3 hours or more, for example, 10 hours or less, preferably 8 hours or less, and more preferably less than 8 hours.
- Such a 2,4-di-substituted product and a 2,6-di-substituted product are both meta-forms when a halogen atom is substituted with a hydrogen atom in the dehalogenation step described later, regardless of the production ratio.
- Such a bisamide compound is a di-substituted product in which two hydrogen atoms of monohalogenated benzenes are substituted with the above amide compound, and the 2-position of monohalogenated benzenes depends on the orientation of monohalogenated benzenes.
- One of the body is a di-substituted product in which two hydrogen atoms of monohalogenated benzenes are substituted with the above amide compound, and the 2-position of monohalogenated benzenes depends on the orientation of monohalogenated benzenes.
- the production ratio (on a molar basis) of the 2,4-di-substituted product is, for example, 1.5 times or more, preferably 2 times or more, for example, 20 times or less, preferably 2,6-di-substituted product. 10 times or less.
- the production ratio of 2,4-disubstituted product is measured by high performance liquid chromatography (HPLC).
- the bisamide compound produced in the reaction step is a bisphthalimide compound (2,4-disubstituted product) represented by the following general formula (7) and the following general formula (8).
- a bisphthalimide compound (2,6-disubstituted) represented by the following general formula (7) and the following general formula (8).
- R 1 has the same meaning as R 1 in General Formula (1), and X has the same meaning as X in General Formula (4).
- X has the same meaning as X in General Formula (4).
- the bisphthalimide compound represented by the general formula (8) for example, when all of R 1 are hydrogen atoms and X is a chlorine atom, N, N ′-(2-chloro-1,3-phenylenebis Methylene) bisphthalimide (see chemical formula (3) above).
- the conversion rate of monohalogenated benzenes is, for example, 80 mol% or more, preferably 90 mol% or more, for example, 100 mol% or less.
- the yield of the bisamide compound is, for example, 60 mol% or more, preferably 70 mol% or more, for example, 100 mol% or less, preferably 90 mol% or less, with respect to the monohalogenated benzenes.
- the conversion rate of monohalogenated benzenes and the yield of bisamide compound are calculated from the integrated values of peaks measured by high performance liquid chromatography (HPLC).
- a monoamide compound (mono-substituted product) in which one of the hydrogen atoms of the monohalogenated benzenes is substituted with the amide compound may be generated.
- the yield of the monoamide compound is, for example, 1 mol% or more, for example, 20 mol% or less, preferably 15 mol% or less, with respect to the monohalogenated benzenes.
- the production ratio (on a molar basis) of the monoamide compound is, for example, 0.01 or more, for example, 0.3 or less, preferably 0.2 or less, relative to the bisamide compound.
- the yield of the monoamide compound and the yield of the production ratio of the monoamide compound are calculated from the integrated value of the peak measured by high performance liquid chromatography (HPLC).
- the reaction product in such a reaction step contains impurities such as components remaining in the reaction (specifically, formaldehydes, amide compounds, inorganic acids, etc.). There is a case. Therefore, the reaction product can be used as it is, but is preferably used after isolation and purification.
- Examples of the purification method of the reaction product include known purification methods such as distillation, solvent extraction, chromatography, crystallization, and recrystallization. In such a purification method, separation and purification by a single purification method may be repeated as necessary, and separation and purification by two or more purification methods may be combined. Among such purification methods, solvent extraction is preferable from the viewpoint of simplicity.
- the reaction product is mixed with a mixed solution of water and an organic solvent, and then the aqueous layer is removed. Thereby, at least the bisamide compound is distributed to the organic solvent (organic layer), and for example, hydrophilic impurities such as formaldehydes and inorganic acids are distributed to the aqueous layer.
- the organic solvent is not particularly limited as long as the bisamide compound is soluble and the formaldehydes and amide compounds are insoluble, and examples thereof include saturated hydrocarbons (hexane, heptane, etc.), aromatic hydrocarbons ( Benzene, toluene, xylene, etc.) and low polar solvents such as halogenated hydrocarbons (dichloromethane, dichloroethane, carbon tetrachloride, etc.).
- aromatic hydrocarbons are preferable from the viewpoint of affinity with the bisamide compound, and toluene is more preferable.
- Such organic solvents may be used alone or in combination of two or more.
- the reaction product contains the above bisamide compound and monoamide compound
- the bisamide compound and monoamide compound can be separated and purified by, for example, chromatography.
- dehalogenation process In the dehalogenation step, in the above bisamide compound, a halogen atom derived from monohalogenated benzenes is replaced with a hydrogen atom.
- a dehalogenation method As a method of substituting a halogen atom of a bisamide compound with a hydrogen atom, that is, a dehalogenation method, a known dehalogenation method from a halogenated benzene can be mentioned. Among such dehalogenation methods, a method of supplying hydrogen to the above bisamide compound in the presence of a catalyst is preferable.
- the catalyst examples include known hydrogenation catalysts, for example, catalysts containing metals such as Ni, Mo, Fe, Co, Cu, Pt, Pd, and Rh, and preferably a palladium carbon catalyst from an industrial viewpoint. It is done. Such catalysts may be used alone or in combination.
- the ratio of the catalyst used is, for example, 0.5 parts by mass or more, preferably 1 part by mass or more, for example, 7 parts by mass with respect to 100 parts by mass of the monohalogenated benzenes used in the reaction step. From the viewpoint of cost, it is preferably 8 parts by mass or less.
- the catalyst is used in an amount of, for example, 0.1 parts by mass or more, preferably 0.5 parts by mass or more, for example, 5 parts by mass or less, with respect to 100 parts by mass of the bisamide compound. Preferably from a viewpoint, it is 2 mass parts or less.
- the catalyst and the bisamide compound are charged into a reactor (for example, an autoclave), and then the air in the reactor is replaced with hydrogen. .
- the metal salt examples include alkali metal carbonates (for example, sodium carbonate and potassium carbonate), alkali metal sulfates (for example, sodium sulfate and potassium sulfate), and alkaline earth metal carbonates (for example, magnesium carbonate and carbonate). Calcium), alkaline earth metal sulfates (eg, magnesium sulfate, calcium sulfate, etc.), and the like.
- alkali metal carbonate for example, sodium carbonate and potassium carbonate
- alkali metal sulfates for example, sodium sulfate and potassium sulfate
- alkaline earth metal carbonates for example, magnesium carbonate and carbonate.
- the mixing ratio of the metal salt is, for example, 0.1 mol or more with respect to 1 mol of monohalogenated benzenes used in the reaction step. 3 mol or less, preferably 1.5 mol or less from the viewpoint of cost.
- organic solvent examples include the organic solvents described above, preferably aromatic hydrocarbons, and more preferably toluene. Such organic solvents may be used alone or in combination of two or more.
- the organic layer obtained in the reaction step can be used as it is without adding an organic solvent in the dehalogenation step.
- the inside of the reactor is pressurized and the temperature is raised to replace the halogen atom of the bisamide compound with a hydrogen atom.
- the temperature is, for example, 40 ° C. or higher, preferably from the viewpoint of reactivity, preferably 70 ° C. or higher, for example, 150 ° C. or lower, preferably from the viewpoint of equipment and safety. 110 MPa or less and the pressure is, for example, 0.1 MPa or more, preferably from the viewpoint of reactivity, preferably 0.2 MPa or more, for example, 3.0 MPa or less, preferably from the viewpoint of equipment and safety, 1.0 MPa.
- the time is, for example, 1 hour or longer, preferably from the viewpoint of reactivity, 2 hours or longer, for example, 20 hours or shorter, preferably 10 hours or shorter.
- R 1 has the same meaning as R 1 in General Formula (1)). That is, both the bisphthalimide compound (2,4-disubstituted product) represented by the general formula (7) and the bisphthalimide compound (2,6-disubstituted product) represented by the general formula (8) are By the dehalogenation step, it is converted into a 1,3-position amide substituted product represented by the general formula (9).
- the yield of the 1,3-position amide substituted product is, for example, 80 mol% or more, preferably 90 mol% or more, for example, 100 mol% or less, preferably 99 mol% or less, with respect to the bisamide compound used in the dehalogenation step. It is.
- the yield of 1,3-position amide substitution product is calculated from the integrated value of the peak measured by high performance liquid chromatography (HPLC).
- HPLC high performance liquid chromatography
- the method for converting an amide group to an amino group is not particularly limited, and may be a known method, and preferably a method for converting an amide group to an amino group by hydrolysis.
- the amide group and water (H 2 O) are reacted in the presence of an acid component or a base component.
- the acid component is not particularly limited, and examples thereof include inorganic acids (hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, etc.), organic acids (sulfonic acid, acetic acid, etc.), and the like. Such acid components may be used alone or in combination.
- Examples of the base component include alkali metal hydroxides (such as sodium hydroxide and potassium hydroxide) and alkaline earth metal hydroxides (such as magnesium hydroxide and calcium hydroxide). Such base components may be used alone or in combination.
- a base component is preferable from the viewpoint of reactivity, more preferable is an alkali metal hydroxide, and particularly preferable is sodium hydroxide.
- the base component is preferably dissolved in water and prepared as a basic aqueous solution.
- the base component concentration of the basic solution is, for example, 30% by mass or more, preferably 40% by mass or more, for example, 70% by mass or less, preferably 60% by mass or less.
- the 1,3-position amide substituent and a basic aqueous solution are stirred and mixed.
- the amide group of the 1,3-position amide substituted product reacts with water in the basic aqueous solution and is converted to an amino group.
- the temperature is, for example, 60 ° C. or more, preferably from the viewpoint of reactivity, preferably 70 ° C. or more, for example, 100 ° C. or less, and preferably from the viewpoint of safety, preferably 90 ° C. or less, and time Is, for example, 0.1 hour or more, preferably 0.5 hour or more, for example, 10 hours or less, preferably 5 hours or less.
- the yield of meta-xylylenediamine is, for example, 80 mol% or more, preferably 90 mol% or more, for example, 100 mol% or less, preferably 99 mol, based on the 1,3-amide substituted product used in the deprotection step. % Or less.
- the yield of meta-xylylenediamine is calculated from the integrated value of the peak measured by gas chromatography (GC).
- the carboxylate is eliminated with hydrolysis of the amide group. Therefore, the reaction product (crude product) in the deprotection step contains a carboxylate in addition to the above meta-xylylenediamine.
- the crude product is preferably used after removing the carboxylate in the crude product.
- the removal of carboxylate in the crude product is not particularly limited, and examples thereof include the purification method described above.
- separation and purification by a single purification method may be repeated as necessary, and separation and purification by two or more purification methods may be combined.
- crystallization is preferable.
- the deprotection step is performed after the reaction step and then through the dehalogenation step, but the present invention is not limited to this.
- a dehalogenation process can also be implemented after a reaction process through a deprotection process.
- the reaction step for example, after the bisphthalimide compound represented by the general formula (7) is formed
- the deprotection step the amide group of the bisphthalimide compound is converted to an amino group, and the halogenated xylylenediamine
- a halogen atom is eliminated from the halogenated xylylenediamine to prepare meta-xylylenediamine.
- the carboxylate In order to convert a carboxylate to a carboxylic acid, for example, the carboxylate is dispersed in an acid, a proton is donated to the carboxylate, and the carboxylate is converted to a carboxylic acid.
- Examples of the acid include the same acids as those described above, preferably an inorganic acid, and more preferably hydrochloric acid. Such acids may be used alone or in combination.
- Such an acid is preferably prepared as an acidic aqueous solution.
- the concentration of the acid is, for example, 1 mol% or more, preferably 10 mol% or more, for example, 50 mol% or less, preferably 30 mol% or less.
- carboxylic acid is reacted with urea or ammonia.
- the temperature is, for example, 20 ° C. or higher, preferably from the viewpoint of reactivity, preferably 40 ° C. or higher, for example, 200 ° C. or lower, preferably from the viewpoint of safety, preferably 150 ° C. or lower
- the time is, for example, 30 minutes or more, preferably 2 hours or more, for example, 50 hours or less, preferably 25 hours or less.
- the amide compound described above that is, the amide compound used in the reaction process is generated. Therefore, the amide compound recovered in the recovery step can be used in the reaction step, and further economic improvement can be achieved.
- Such a method for producing meta-xylylenediamines can produce bisamide compounds, and thus meta-xylylenediamines, safely, at low cost and in high yield under relatively mild conditions as compared with conventional methods. can do. Therefore, such a method for producing meta-xylylenediamine is excellent in equipment, safety and economy. As a result, it can be suitably used as an industrial production method for meta-xylylenediamines.
- meta-xylylenediamines and salts thereof are suitably used as various industrial raw materials such as polyurethane raw materials and resin raw materials such as polyamide raw materials.
- meta-xylylenediamines when used as a polyurethane raw material, meta-xylylenediamines are derived into meta-xylylene diisocyanates by a known phosgene method or non-phosgene method.
- Table 1 shows the formulation, acidic liquid, reaction conditions, addition rate and yield in the reaction step.
- each component in each step was analyzed by gas chromatography (GC) or high performance liquid chromatography (HPLC). More specifically, a three-check quantity curve was created, and the concentration and content of each component were calculated from the integrated value of the peak obtained by GC or HPLC.
- GC gas chromatography
- HPLC high performance liquid chromatography
- reaction product When the reaction product was analyzed by HPLC, the conversion of monochlorobenzene was 99 mol%, and the reaction product contained a bisphthalimide compound (disubstituted product) and a monophthalimide compound (monosubstituted product). .
- the yield of the bisphthalimide compound (disubstituted product) with respect to monochlorobenzene was 80 mol%, and the yield of the monophthalimide compound (monosubstituted product) was 10 mol%. That is, the total amount of bisphthalimide compounds was 0.4 mol, and the total mass was 172.3 g.
- the obtained bisphthalimide compound includes a bisphthalimide compound represented by the following chemical formula (2) (2,4-disubstituted product) and a bisphthalimide compound represented by the following chemical formula (3) (2,6-disubstituted product). ) Only. Chemical formula (2):
- the gas phase portion in the autoclave was replaced with nitrogen, then with hydrogen, and pressurized to a hydrogen pressure of 0.5 MPa.
- the temperature inside the autoclave was raised to 90 ° C. to advance the dehalogenation reaction of the bisphthalimide compound. After 5 hours, the reaction was completed and cooled.
- N, N ′-(1,3-phenylenebismethylene) bisphthalimide (substituted 1,3-position amide).
- the yield of N, N ′-(1,3-phenylenebismethylene) bisphthalimide with respect to the sum of the bisphthalimide compounds represented by the above chemical formula (2) and the following chemical formula (3) was 98 mol%. That is, 0.39 mol of N, N ′-(1,3-phenylenebismethylene) bisphthalimide was produced, and its mass was 154.6 g.
- N, N ′-(1,3-phenylenebismethylene) bisphthalimide was calculated from the integrated value of peaks measured by high performance liquid chromatography (HPLC).
- HPLC high performance liquid chromatography
- phthalic acid and equimolar urea (45.6 g) were charged into the flask, the temperature in the flask was raised to a temperature range of 60 ° C. to 130 ° C., and the resulting ammonia was stirred while being removed from the flask. As a result, phthalimide was obtained.
- the recovery yield of phthalimide with respect to sodium phthalate was 92 mol%. That is, 0.70 mol of phthalimide was recovered and its mass was 102.9 g.
- Example 2 In the reaction step, meta-xylylenediamine was prepared in the same manner as in Example 1 except that the amount of 95% by mass sulfuric acid aqueous solution was changed to 464.6 g (sulfuric acid: 4.5 mol).
- Example 3 In the reaction process, except that the amount of 95 mass% sulfuric acid aqueous solution used was changed to 464.6 g (sulfuric acid: 4.5 mol), the reaction temperature was changed to 50 ° C., and the reaction time was changed to 8 hours. Prepared meta-xylylenediamine in the same manner as in Example 1.
- Example 4 In the reaction step, in the same manner as in Example 1, except that the concentration of the sulfuric acid aqueous solution was changed to 98% by mass and the usage amount of the sulfuric acid aqueous solution was changed to 450.4 g (sulfuric acid: 4.5 mol). -Xylylenediamine was prepared.
- the conversion of monochlorobenzene was 99 mol%
- the yield of the bisphthalimide compound (di-substituted product) was 80 mol%
- the yield of the monophthalimide compound (mono-substituted product) was 12 mol%.
- Example 5 In the reaction step, the meta-xylyl was changed in the same manner as in Example 1 except that the concentration of the sulfuric acid aqueous solution was changed to 88% by mass and the usage amount of the sulfuric acid aqueous solution was changed to 557.3 g (sulfuric acid: 5 mol). Range amine was prepared.
- the conversion of monochlorobenzene was 99 mol%
- the yield of the bisphthalimide compound (disubstituted product) was 20 mol%
- the yield of the monophthalimide compound (monosubstituted product) was 5 mol%.
- Comparative Example 9 In the reaction step, the concentration of the sulfuric acid aqueous solution was changed to 88% by mass, the usage amount of the sulfuric acid aqueous solution was changed to 557.3 g (sulfuric acid: 5 mol), the reaction temperature was changed to 30 ° C., and the reaction time. Was carried out in the same manner as in Example 1 except that was changed to 8 hours.
- the conversion of monochlorobenzene was 99 mol%, and the yield of the monophthalimide compound (mono-substituted product) was 94 mol%. Moreover, the bisphthalimide compound (di-substituted product) was not produced.
- Comparative Example 10 In the reaction step, the concentration of the aqueous sulfuric acid solution was changed to 70% by mass, the usage amount of the aqueous sulfuric acid solution was changed to 1050.8 g (sulfuric acid: 7.5 mol), the reaction temperature was changed to 100 ° C., and The reaction was performed in the same manner as in Example 1 except that the reaction time was changed to 8 hours.
- the conversion of monochlorobenzene was 0 mol%, and bisphthalimide compound (di-substituted product) and monophthalimide compound (mono-substituted product) were not produced.
- meta-xylylenediamines can be produced under relatively mild conditions as compared with conventional methods. Therefore, meta-xylylenediamines can be obtained more industrially advantageous from the viewpoints of equipment, safety and economy.
- meta-xylylenediamines are preferably used for high performance in applications such as polyamides, polyimides, polyurethanes, polythiourethanes, polyisocyanates, and epoxy resin curing agents.
- polyamides polyimides
- polyurethanes polyurethanes
- polythiourethanes polyisocyanates
- epoxy resin curing agents epoxy resin curing agents
- it is suitable for polyurethane paints, adhesives, sealants, and elastomer and polythiourethane lens applications.
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
一般式(1):
また、前記脱保護工程において脱離するフタル酸類を回収した後、回収したフタル酸類と、アンモニアおよび/または尿素とを反応させて、前記フタルイミド類を調製する回収工程をさらに含むことが好適である。
化学式(2):
[反応工程]
反応工程では、モノハロゲン化ベンゼン類と、ホルムアルデヒド類と、第1級アミド基または第2級アミド基を有するアミド化合物とを、酸性液体の存在下において反応させて、ビスアミド化合物を生成する。
一般式(4):
一般式(5):
一般式(4)および一般式(5)のそれぞれにおいて、Xで示されるハロゲン原子としては、例えば、フッ素原子、塩素原子、臭素原子、ヨウ素原子などが挙げられる。このようなハロゲン原子のなかでは、原料コストの観点から好ましくは、塩素原子、臭素原子、ヨウ素原子が挙げられ、さらに好ましくは、塩素原子が挙げられる。
一般式(6):
HO(CH2O)nH (6)
(一般式(6)中、nは、2以上100以下の整数を示す。)
一般式(6)において、nは、好ましくは、8以上100以下である。
一般式(1):
一般式(1)において、R1で示されるハロゲン原子としては、例えば、一般式(4)においてXで示されるハロゲン原子と同様のハロゲン原子などが挙げられる。
一般式(7):
上記一般式(7)で示されるビスフタルイミド化合物は、例えば、R1のすべてが水素原子であり、Xが塩素原子である場合、N,N′‐(4-クロロ-1,3‐フェニレンビスメチレン)ビスフタルイミド(上記化学式(2)参照)である。
一般式(8):
上記一般式(8)で示されるビスフタルイミド化合物は、例えば、R1のすべてが水素原子であり、Xが塩素原子である場合、N,N′‐(2-クロロ-1,3‐フェニレンビスメチレン)ビスフタルイミド(上記化学式(3)参照)である。
[脱ハロゲン化工程]
脱ハロゲン化工程では、上記のビスアミド化合物において、モノハロゲン化ベンゼン類に由来するハロゲン原子を水素原子に置換する。
一般式(9):
つまり、上記一般式(7)で示されるビスフタルイミド化合物(2,4-ジ置換体)、および、上記一般式(8)で示されるビスフタルイミド化合物(2,6-ジ置換体)の両方は、脱ハロゲン化工程によって、上記一般式(9)で示される1,3位アミド置換体に変換される。
[脱保護工程]
脱保護工程では、上記の1,3位アミド置換体が有する、アミド化合物に由来するアミド基をアミノ基に変換する。
化学式(10):
[回収工程]
回収工程では、まず、脱保護工程において得られたカルボン酸塩を、カルボン酸塩をカルボン酸に変換した後、カルボン酸と、尿素あるいはアンモニアとを反応させて、上記のアミド化合物を生成する。
(実施例1)
[反応工程]
攪拌器、滴下漏斗、温度計、ガス排気管を装備した1Lの4つ口フラスコに、95質量%硫酸水溶液515.8g(硫酸:5mol)を装入した後、さらに、フタルイミド147.1g(1mol)、90質量%パラホルムアルデヒド水溶液33.4g(ホルムアルデヒド:1mol)を装入して、それらを95質量%硫酸水溶液に溶解して、アルデヒド・アミド溶解液を調製した。
化学式(2):
[脱ハロゲン化工程]
次いで、攪拌器付き1Lのオートクレーブに、パラジウムカーボン(触媒)1.5gと、炭酸ナトリウム無水物53.0g(0.5mol)とを装入した後、さらに上記の有機層の全量を装入した。
[脱保護工程]
攪拌器、ディーンシュタック還流管、温度計、ガス排気管を装備した1Lの4つ口フラスコに、脱ハロゲン化工程で得られた濾液(取り分けた濾液を除く)の全量を装入した後、さらに、48質量%水酸化ナトリウム水91.7g(1.1mol)を装入し攪拌した。フラスコ内を80℃に昇温し、この温度を一定にし、かつ、常圧下で2時間攪拌した。さらに、フラスコ内の温度を110~120℃に昇温し、ディーンシュタック還流管により水を分離して抜き出した。
[回収工程]
また、脱保護工程において濾別されたフタル酸ナトリウム159.7g(0.76mol)を、1Lのフラスコ中で20mol%塩酸に分散させて、フタル酸(0.76mol)に変換した。次いで、フタル酸と等モルの尿素(45.6g)をフラスコに装入し、フラスコ内を60℃~130℃の温度範囲に昇温するとともに、生じるアンモニアをフラスコ外に除去しながら攪拌した。これによって、フタルイミドを得た。フタル酸ナトリウムに対する、フタルイミドの回収収率は、92mol%であった。つまり、フタルイミドは、0.70mol回収され、その質量は、102.9gであった。
(実施例2)
反応工程において、95質量%硫酸水溶液の使用量を464.6g(硫酸:4.5mol)に変更した点以外は、実施例1と同様にして、メタ-キシリレンジアミンを調製した。
(実施例3)
反応工程において、95質量%硫酸水溶液の使用量を464.6g(硫酸:4.5mol)に変更した点、反応温度を50℃に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様にして、メタ-キシリレンジアミンを調製した。
(実施例4)
反応工程において、硫酸水溶液の濃度を98質量%に変更した点、硫酸水溶液の使用量を、450.4g(硫酸:4.5mol)に変更した点以外は、実施例1と同様にして、メタ-キシリレンジアミンを調製した。
(実施例5)
反応工程において、硫酸水溶液の濃度を88質量%に変更した点、硫酸水溶液の使用量を、557.3g(硫酸:5mol)に変更した点以外は、実施例1と同様にして、メタ-キシリレンジアミンを調製した。
(比較例1)
反応工程において、硫酸水溶液の使用量を、413.0g(硫酸:4mol)に変更した点以外は、実施例1と同様に実施した。
(比較例2)
反応工程において、95質量%硫酸水溶液の使用量を464.6g(硫酸:4.5mol)に変更した点、反応温度を40℃に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様に実施した。
(比較例3)
反応工程において、硫酸水溶液の濃度を80質量%に変更した点、硫酸水溶液の使用量を613.0g(硫酸:5mol)に変更した点、反応温度を100℃に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様に実施した。
(比較例4)
反応工程において、90質量%パラホルムアルデヒド33.4g(ホルムアルデヒド:1mol)を、37質量%ホルムアルデヒド水溶液81.2g(ホルムアルデヒド:1mol)に変更した点、フタルイミド147.1g(1mol)を、20質量%アンモニア水85.0g(アンモニア:1mol)に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様に実施した。
(比較例5)
反応工程において、フタルイミド147.1g(1mol)を、20質量%アンモニア水溶液85.0g(アンモニア:1mol)に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様に実施した。
(比較例6)
反応工程において、95質量%硫酸水溶液515.8g(硫酸:5mol)を、99質量%メタンスルホン酸水溶液970.7g(メタンスルホン酸:10mol)に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様に実施した。
(比較例7)
反応工程において、95質量%硫酸水溶液515.8g(硫酸:5mol)を、99質量%酢酸水溶液606.6g(酢酸:10mol)に変更した点、反応温度を100℃に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様に実施した。
(比較例8)
反応工程において、クロロベンゼン56.3g(0.5mol)を、ベンゼン39.1g(0.5mol)に変更した点以外は、実施例1と同様に実施した。
(比較例9)
反応工程において、硫酸水溶液の濃度を88質量%に変更した点、硫酸水溶液の使用量を557.3g(硫酸:5mol)に変更した点、反応温度を30℃に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様に実施した。
(比較例10)
反応工程において、硫酸水溶液の濃度を70質量%に変更した点、硫酸水溶液の使用量を1050.8g(硫酸:7.5mol)に変更した点、反応温度を100℃に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様に実施した。
(比較例11)
反応工程において、硫酸水溶液の濃度を48質量%に変更した点、硫酸水溶液の使用量を1021.7g(硫酸:5mol)に変更した点、反応温度を100℃に変更した点、および、反応時間を8時間に変更した点以外は、実施例1と同様に実施した。
CB :モノクロロベンゼン(東京化成株式会社製)
BZ :ベンゼン(和光純薬工業株式会社製)
PFA :パラホルムアルデヒド(東京化成株式会社製)
ホルマリン:37質量%ホルムアルデヒド水溶液(和光純薬工業株式会社製)
PI :フタルイミド(和光純薬工業株式会社製)
NH3水 :20mol%アンモニア水溶液(和光純薬工業株式会社製)
MSA :メタンスルホン酸(和光純薬工業株式会社製)
なお、上記発明は、本発明の例示の実施形態として提供したが、これは単なる例示に過ぎず、限定的に解釈してはならない。当該技術分野の当業者によって明らかな本発明の変形例は、後記特許請求の範囲に含まれる。
Claims (7)
- モノハロゲン化ベンゼン類と、ホルムアルデヒド類と、第1級アミド基または第2級アミド基を有するアミド化合物とを、酸性液体の存在下において反応させる反応工程と、
前記モノハロゲン化ベンゼン類に由来するハロゲン原子を水素原子に置換する脱ハロゲン化工程と、
前記アミド化合物に由来する第1級アミド基または第2級アミド基をアミノ基に変換する脱保護工程と、を含み、
前記反応工程において、
前記酸性液体が、無機酸を含有し、
前記モノハロゲン化ベンゼン類に対する、前記無機酸の水素原子の当量比が、16を超過し、
前記酸性液体中の無機酸の濃度が、80質量%を超過し、
反応温度が、40℃を超過していることを特徴とする、メタ-キシリレンジアミン類の製造方法。 - 前記脱保護工程において脱離するフタル酸類を回収した後、回収したフタル酸類と、アンモニアおよび/または尿素とを反応させて、前記フタルイミド類を調製する回収工程をさらに含むことを特徴とする、請求項2に記載のメタ-キシリレンジアミン類の製造方法。
- 前記無機酸は、硫酸であることを特徴とする、請求項1~3のいずれか一項に記載のメタ-キシリレンジアミン類の製造方法。
- 前記モノハロゲン化ベンゼン類が、モノクロロベンゼンであることを特徴とする、請求項1~4のいずれか一項に記載のメタ-キシリレンジアミン類の製造方法。
- 前記モノハロゲン化ベンゼン類に対する、前記無機酸の水素原子の当量比が、18以上であり、
前記酸性液体中の無機酸の濃度が、88質量%以上であり、
前記反応温度が、50℃以上であることを特徴とする、請求項1~5のいずれか一項に記載のメタ-キシリレンジアミン類の製造方法。 - モノハロゲン化ベンゼン類と、ホルムアルデヒド類と、第1級アミド基または第2級アミド基を有するアミド化合物とを、酸性液体の存在下において反応させる反応工程を含み、
前記反応工程において、
前記酸性液体が、無機酸を含有し、
前記モノハロゲン化ベンゼン類に対する、前記無機酸の水素原子の当量比が、16を超過し、
前記酸性液体中の無機酸の濃度が、80質量%を超過し、
反応温度が、40℃を超過していることを特徴とする、ビスアミド化合物の製造方法。
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EP14838298.9A EP3037406A4 (en) | 2013-08-23 | 2014-08-11 | Method for producing m-xylylenediamine and method for producing bisamide compound |
JP2014556875A JP5739591B1 (ja) | 2013-08-23 | 2014-08-11 | メタ−キシリレンジアミン類の製造方法およびビスアミド化合物の製造方法 |
KR1020157035752A KR101768357B1 (ko) | 2013-08-23 | 2014-08-11 | 메타-크실릴렌디아민류의 제조 방법 및 비스아미드 화합물의 제조 방법 |
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JP2007186504A (ja) * | 2005-12-15 | 2007-07-26 | Sumitomo Chemical Co Ltd | 選択的一級アミン化合物の製造方法 |
JP2011162697A (ja) * | 2010-02-10 | 2011-08-25 | Fujifilm Corp | 射出成形用樹脂組成物、成形体、及びその製造方法、並びに電気電子機器用筐体 |
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JP2007186504A (ja) * | 2005-12-15 | 2007-07-26 | Sumitomo Chemical Co Ltd | 選択的一級アミン化合物の製造方法 |
JP2011162697A (ja) * | 2010-02-10 | 2011-08-25 | Fujifilm Corp | 射出成形用樹脂組成物、成形体、及びその製造方法、並びに電気電子機器用筐体 |
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