WO2019167940A1 - ニトリル系溶媒の精製方法 - Google Patents
ニトリル系溶媒の精製方法 Download PDFInfo
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- WO2019167940A1 WO2019167940A1 PCT/JP2019/007306 JP2019007306W WO2019167940A1 WO 2019167940 A1 WO2019167940 A1 WO 2019167940A1 JP 2019007306 W JP2019007306 W JP 2019007306W WO 2019167940 A1 WO2019167940 A1 WO 2019167940A1
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- nitrile solvent
- aqueous solution
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/32—Separation; Purification; Stabilisation; Use of additives
- C07C253/34—Separation; Purification
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/40—Extractive distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
- C07C255/01—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms
- C07C255/02—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms of an acyclic and saturated carbon skeleton
- C07C255/03—Mononitriles
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
- C07C255/01—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms
- C07C255/06—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms of an acyclic and unsaturated carbon skeleton
- C07C255/07—Mononitriles
- C07C255/08—Acrylonitrile; Methacrylonitrile
Definitions
- the present invention relates to a method for purifying a nitrile solvent.
- Nitrile solvents may contain impurities. Since impurities can cause various problems, various purification methods have been proposed.
- Patent Document 1 a gas generated by an ammoxidation reaction of isobutylene or t-butyl alcohol is brought into contact with an aqueous sodium hydrogen sulfite solution at a pH of 5 to 9 and a temperature of 80 ° C. or less to separate methacrolein contained in the gas.
- a method for producing methacrylonitrile including removing.
- Patent Document 2 discloses a method for purifying acetonitrile, which comprises contacting acetonitrile produced as a by-product in propylene ammoxidation with an aqueous solution of an alkali metal salt or alkaline earth metal salt of hypochlorous acid. .
- Patent Document 2 states that it is preferable to use a mineral acid such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid in the contact treatment.
- Patent Document 3 acetylacetone and dimethylaminoethanol are added to acrylonitrile and heated at 50 ° C., followed by addition of an aqueous ferric chloride solution, followed by cooling to room temperature and precision distillation to remove impurities acrolein. It is disclosed.
- Patent Document 4 water-containing crude acetonitrile is mixed with alkali, separated into an acetonitrile phase and an aqueous phase, the aqueous phase is removed, and the resulting acetonitrile phase is passed through a distillation step to obtain purified acetonitrile, and the obtained purification is obtained.
- a method for producing high-purity acetonitrile is disclosed, wherein high-purity acetonitrile is obtained by passing acetonitrile through a cation exchange resin.
- Patent Document 5 when purifying crude acetonitrile, the first step of bringing the raw crude acetonitrile into contact with the nascent oxygen, and one or more selected from the solid base and the adsorbent as the acetonitrile through the first step A method for purifying crude acetonitrile is disclosed, wherein the crude acetonitrile is purified in the order of the second step of contacting with the substance.
- Patent Document 6 a gas containing ozone is brought into contact with by-product crude acetonitrile obtained by ammoxidation reaction of propylene or isobutylene in the presence of a catalyst, and then neutralized with a basic soot substance, followed by distillation to give a wavelength of 200 nm to A method for purifying acetonitrile is disclosed, which is characterized by obtaining acetonitrile having no UV absorption at 350 nm.
- Patent Document 7 discloses that after by-product crude acetonitrile obtained by subjecting propylene or isobutylene to an ammoxidation reaction in the presence of a catalyst is contacted with sulfuric acid, sulfuric acid is separated, and then contacted with a gas containing ozone.
- a method for purifying acetonitrile is disclosed, which is characterized by obtaining acetonitrile having no ultraviolet absorption at a wavelength of 200 nm to 350 nm by distillation.
- Patent Document 8 when purifying crude acetonitrile, a first step of bringing raw crude acetonitrile into contact with nascent oxygen, and acetonitrile obtained through the first step were selected from a basic substance and an adsorbent. Included in the second step of contacting with the substance of the species or more, the third step of separating and removing the permanganate-reducing substance contained in the acetonitrile having undergone the second step, and the acetonitrile having undergone the third step A crude acetonitrile purification method comprising purifying crude acetonitrile comprising a fourth step of separating and removing the low boiling point compound and the high boiling point compound. Patent Document 8 exemplifies iron chloride, sodium bisulfite, and the like as the permanganate-reducing substance removing agent.
- nitrile solvents extend to advanced technical fields such as solvents for organic synthesis reactions, raw materials for agricultural chemicals and pharmaceuticals, electrolytes for secondary batteries, solvents for organic EL material synthesis, and cleaning solutions for electronic components. Yes. Therefore, an ultra-high purity nitrile solvent has become necessary.
- the prior art focused on the removal of carbonyl compounds such as aldehydes, but imine removal was not considered.
- An object of the present invention is to provide a method for producing a nitrile solvent having higher purity by purifying a nitrile solvent containing imine or the like as an impurity.
- An oxidant is added to a nitrile solvent containing impurities, a nitrile solvent that has been contacted with an acidic aqueous solution, a nitrile solvent that has been contacted with an aqueous sodium hydrogen sulfite solution, or a nitrile solvent that has been contacted with an alkaline aqueous solution.
- a high purity nitrile solvent can be obtained from a nitrile solvent containing imine or the like as an impurity.
- a high-purity nitrile solvent can be obtained from a nitrile solvent containing an imine and a conjugated diene, a carbonyl compound or a high-boiling substance as impurities.
- the method for purifying a nitrile solvent of the present invention includes performing contact treatment A, contact treatment B, and contact treatment C in this order.
- a suitable method for purifying the nitrile solvent of the present invention further includes performing a contact treatment D and / or a distillation treatment.
- the nitrile solvent that is the target of the purification method of the present invention is an organic solvent having a cyano group (—CN) in the molecule and containing impurities.
- the nitrile solvent used in the present invention is preferably hydrophobic.
- “hydrophobic” means separation into a water phase and a nitrile solvent phase when allowed to stand at room temperature.
- Specific examples of nitrile solvents include saturated aliphatic nitriles such as propionitrile, butyronitrile, isobutyronitrile, and valeronitrile, aromatic nitriles such as benzonitrile, o-tolunitrile, m-tolunitrile, and p-tolunitrile. Can be mentioned.
- the purification method of the present invention can be preferably applied to a nitrile solvent containing an imine as an impurity, and more suitable for a nitrile solvent containing an imine and a conjugated diene, a carbonyl compound and / or a high-boiling substance as impurities. It can be preferably applied.
- Examples of the imine that is an impurity contained in the nitrile solvent include a compound represented by the formula (I).
- R 1 to R 3 represent a hydrogen atom or an organic group.
- Examples of the conjugated diene that is an impurity contained in the nitrile solvent include a compound represented by the formula (II).
- R 4 to R 9 represent a hydrogen atom or an organic group.
- R 5 and R 6 may be connected to form a ring.
- Examples of the carbonyl compound that is an impurity contained in the nitrile solvent include ketones and aldehydes.
- the high-boiling substance that is an impurity contained in the nitrile solvent is a substance other than the above-mentioned imine, conjugated diene, and carbonyl compound, and has a boiling point higher than that of the nitrile solvent.
- Examples of the acidic aqueous solution used in the contact treatment A include aqueous mineral acid solutions such as hydrochloric acid (aqueous hydrogen chloride solution), sulfuric acid aqueous solution, and nitric acid aqueous solution. Of these, hydrochloric acid is preferred.
- the pH (20 ° C.) of the acidic aqueous solution is usually 3 or less, preferably 2.9 or less, 2.8 or less, 2.7 or less, 2.6 or less, 2.5 or less, 2.4 or less, 2 or less, 2 .3 or less, 2.2 or less, 2.1 or less, 2.0 or less, 1.9 or less, 1.8 or less, 1.7 or less, 1.6 or less, 1.5 or less can be selected. .
- the amount of the acidic aqueous solution to be contacted is not particularly limited. For example, 1 to 500% by weight, 1 to 400% by weight, 1 to 300% by weight, 1 to 200% by weight, ⁇ 100% by weight can be selected.
- the method for bringing the acidic aqueous solution into contact with the nitrile solvent is not particularly limited.
- a method in which a nitrile solvent and an acidic aqueous solution are added and stirred in a batch type extraction apparatus; a method in which the nitrile solvent and the acidic aqueous solution are brought into countercurrent contact with a continuous extraction apparatus can be exemplified.
- the temperature at which the acidic aqueous solution is brought into contact with the nitrile solvent is not particularly limited.
- 0 ° C to 100 ° C, 0 ° C to 90 ° C, 0 ° C to 80 ° C, 0 ° C to 70 ° C, 0 ° C to 60 ° C, A temperature of 0 ° C. to 50 ° C. can be selected.
- the imine that is an impurity contained in the nitrile solvent is decomposed into the corresponding carbonyl compound and primary amine. Since the primary amine is more dissolved in the acidic aqueous solution phase than the nitrile solvent phase, the primary amine can be removed from the nitrile solvent by separating the acidic aqueous solution phase from the nitrile solvent phase. Then, the carbonyl compound remains as an impurity in the nitrile solvent subjected to the contact treatment A.
- the aqueous sodium hydrogen sulfite solution used in the contact treatment B is not particularly limited depending on its concentration. For example, 1 wt% to solubility, 5 wt% to solubility, 10 wt% to solubility, 15 wt% to solubility, 20 wt%. -Solubility, 25 wt% -Solubility, 30 wt% -Solubility, 30 wt% -35 wt%, etc. can be selected.
- Sodium bisulfite (NaHSO 3 ) has a water solubility of about 43 to 44% by weight at 25 ° C., and the pH of the aqueous sodium hydrogen sulfite solution at 20 ° C. is preferably more than 3.0, more preferably 3 .5 to 5.0.
- the amount of the aqueous sodium hydrogen sulfite solution to be contacted is not particularly limited, but is, for example, 1 to 500% by weight, 1 to 400% by weight, 1 to 300% by weight, 1 to 200% by weight with respect to the total weight of the nitrile solvent. From 1 to 100% by weight can be selected.
- the method for bringing the aqueous solution of sodium hydrogen sulfite into contact with the nitrile solvent is not particularly limited.
- the temperature at which the nitrile solvent is brought into contact with the aqueous sodium hydrogen sulfite solution is not particularly limited. For example, 0 ° C. to 100 ° C., 0 ° C. to 90 ° C., 0 ° C. to 80 ° C., 0 ° C. to 70 ° C., 0 ° C. to 60 ° C. °C, 0 °C ⁇ 50 °C etc. can be selected.
- the carbonyl compound which is an impurity contained in the nitrile solvent, is converted into the corresponding ⁇ -hydroxysulfonic acid compound. Since the ⁇ -hydroxysulfonic acid compound is more dissolved in the phase of the aqueous sodium hydrogen sulfite solution than in the phase of the nitrile solvent, when the aqueous sodium hydrogen sulfite phase is separated from the phase of the nitrile solvent, the ⁇ -hydroxysulfonic acid compound is separated from the nitrile solvent phase.
- the sulfonic acid compound ie carbonyl compound
- the impurity imine can be removed.
- a known treatment for removing a carbonyl compound such as an aldehyde from the nitrile compound may be performed.
- a treatment method including removing aldehydes which are impurities in nitrile with an ion exchange resin JP 2000-16978, JP 58-134063, JP 10-7638, JP No. 54-151915, WO2006 / 121081A, etc.
- Examples of the alkaline aqueous solution used in the contact treatment C include alkali metal hydroxide aqueous solutions such as sodium hydroxide aqueous solution and potassium hydroxide aqueous solution, alkaline earth metal hydroxide aqueous solutions such as calcium hydroxide aqueous solution and strontium hydroxide aqueous solution, ammonia. Examples thereof include water and an aqueous methylamine solution. Of these, an aqueous sodium hydroxide solution is preferred.
- the concentration of the alkaline aqueous solution is not particularly limited, but for example, 1% by weight to solubility, 5% by weight to solubility, 10% by weight to solubility, 15% by weight to solubility, 20% by weight to solubility, 25% by weight to solubility, From wt% to solubility, from 30 wt% to 35 wt% can be selected.
- Sodium hydroxide has a solubility in water at 20 ° C. of about 109 g / 100 ml
- potassium hydroxide has a solubility in water at 25 ° C. of about 110 g / 100 ml.
- the amount of the alkaline aqueous solution to be contacted is not particularly limited. For example, 1 to 500% by weight, 1 to 400% by weight, 1 to 300% by weight, 1 to 200% by weight, ⁇ 100% by weight can be selected.
- the method for bringing the alkaline aqueous solution into contact with the nitrile solvent is not particularly limited.
- a method in which a nitrile solvent and an alkaline aqueous solution are put in a batch type extraction apparatus and agitated; a method in which a nitrile solvent and an alkaline aqueous solution are brought into countercurrent contact with a continuous extraction apparatus can be exemplified.
- the temperature at which the nitrile solvent is brought into contact with the aqueous alkali solution is not particularly limited.
- 0 ° C to 100 ° C, 0 ° C to 90 ° C, 0 ° C to 80 ° C, 0 ° C to 70 ° C, 0 ° C to 60 ° C, A temperature of 0 ° C. to 50 ° C. can be selected.
- the acidic substance which is an impurity contained in the nitrile solvent and the acidic substance added in the contact treatments A and B are neutralized and converted into a corresponding salt. Since the salt dissolves more in the alkaline aqueous solution phase than in the nitrile solvent phase, the salt (ie, acidic substance) can be removed from the nitrile solvent by separating the alkaline aqueous solution phase from the nitrile solvent phase.
- oxidizing agent used in the contact treatment D examples include a sodium hypochlorite aqueous solution (antiformin), hydrogen peroxide, oxygen, air, and ozone. Of these, oxygen and air are preferred because they are easy to handle.
- the nitrile solvent containing impurities before the contact treatment A is contacted with the nitrile solvent that has been contacted with the acidic aqueous solution before the contact treatment B, and the sodium hydrogen sulfite before the contact treatment C is conducted. It can be applied to a nitrile solvent that has been contacted with an aqueous solution, or to a nitrile solvent that has been contacted with an alkaline aqueous solution after contact treatment C has been performed.
- the method for bringing the oxidizing agent into contact with the nitrile solvent is not particularly limited.
- a method of bubbling a gaseous oxidant such as oxygen, air, ozone, etc. to a nitrile solvent a method of countercurrent contacting a gaseous oxidant and a nitrile solvent in a gas absorption tower, hypochlorous acid
- a method of stirring by adding a liquid oxidizer such as aqueous sodium acid solution (antiformin) or hydrogen peroxide to a nitrile solvent
- a method of adding a nitrile solvent to a liquid oxidizer and stirring etc.
- the conjugated diene By bringing an oxidizing agent into contact with the nitrile solvent, the conjugated diene, which is an impurity contained in the nitrile solvent, is oxidized. From the viewpoint of promoting the oxidation of the conjugated diene, it is preferable to perform the contact treatment D using a gaseous oxidant in the presence of an aqueous sodium hydrogen sulfite solution.
- the product obtained by oxidation of the conjugated diene can be removed from the nitrile solvent by contact treatment with an acidic aqueous solution, contact treatment with an aqueous sodium hydrogen sulfite solution, contact treatment with an alkaline aqueous solution, or distillation treatment described later. .
- the distillation treatment is preferably performed after performing the contact treatment C or the contact treatment D.
- the distillation treatment can be performed by a known method.
- the nitrile solvent can be evaporated to separate a high-boiling substance such as N-isobutylformamide as a residue.
- Example 1 Crude isobutyronitrile containing 2454 ppm of N-isobutyl-2-methylpropane-1-imine, 37 ppm of isobutyraldehyde, 8 ppm of 2,5-dimethylhexa-2,4-diene, and 220 ppm of N-isobutylformamide was prepared. .
- the isobutyronitrile phase obtained by the water washing treatment was heated to reflux to perform Dean-Stark dehydration. Thereafter, it was distilled (distillation treatment) at the boiling point of isobutyronitrile (internal temperature of 108 ° C. or lower). Impurities contained in the isobutyronitrile phase obtained by distillation treatment are less than 2 ppm of N-isobutyl-2-methylpropane-1-imine, less than 2 ppm of isobutyraldehyde, 2 ppm of 2,5-dimethylhexa-2,4-diene. And less than 2 ppm N-isobutylformamide.
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Abstract
Description
本発明の課題は、イミンなどを不純物として含有するニトリル系溶媒を精製し、より高純度のニトリル系溶媒を製造する方法を提供することである。特に、イミンと、共役ジエン、カルボニル化合物または高沸点物質とを不純物として含有するニトリル系溶媒を精製し、より高純度のニトリル系溶媒を製造する方法を提供することである。
〔1〕 不純物を含有するニトリル系溶媒に、pH3以下の酸性水溶液を接触させること、
酸性水溶液との接触を経たニトリル系溶媒に、亜硫酸水素ナトリウム水溶液を接触させること、および
亜硫酸水素ナトリウム水溶液との接触を経たニトリル系溶媒に、アルカリ性水溶液を接触させること
を含む、ニトリル系溶媒の精製方法。
〔3〕 アルカリ性水溶液との接触を経たニトリル系溶媒または酸化剤との接触を経たニトリル系溶媒を蒸留することをさらに含む、〔1〕または〔2〕に記載の精製方法。
〔5〕 アルカリ性水溶液が、水酸化ナトリウム水溶液である、〔1〕~〔4〕のいずれかひとつに記載の精製方法。
〔6〕 ニトリル系溶媒が、イソブチロニトリルである、〔1〕~〔5〕のいずれかひとつに記載の精製方法。
次いで酸性水溶液との接触を経たニトリル系溶媒に、カルボニル化合物除去処理を施すこと
を含む、ニトリル系溶媒の精製方法。
ニトリル系溶媒の具体例としては、プロピオニトリル、ブチロニトリル、イソブチロニトリル、バレロニトリルなどの飽和脂肪族ニトリル、ベンゾニトリル、o-トルニトリル、m-トルニトリル、p-トルニトリルなどの芳香族ニトリルなどを挙げることができる。これらのうち、飽和脂肪族ニトリル、芳香族ニトリルが好ましい。
本発明の精製方法は、イミンを不純物として含有するニトリル系溶媒に対して好ましく適用でき、イミンと、共役ジエン、カルボニル化合物および/または高沸点物質とを不純物として含有するニトリル系溶媒に対してより好ましく適用できる。
式(II)中、R4~R9は、水素原子または有機基を意味する。R5とR6が繋がって環を成していてもよい。
接触処理Aにおいて用いられる酸性水溶液としては、例えば、塩酸(塩化水素水溶液)、硫酸水溶液、硝酸水溶液などの鉱酸水溶液を挙げることができる。これらのうち、塩酸が好ましい。酸性水溶液のpH(20℃)は、通常、3以下であり、好ましくは2.9以下、2.8以下、2.7以下、2.6以下、2.5以下、2.4以下、2.3以下、2.2以下、2.1以下、2.0以下、1.9以下、1.8以下、1.7以下、1.6以下、1.5以下などを選択することができる。
第一級アミンは、ニトリル系溶媒の相よりも酸性水溶液の相に多く溶解するので、酸性水溶液の相をニトリル系溶媒の相から分離すると、ニトリル系溶媒から第一級アミンを除去できる。そして、接触処理Aの施されたニトリル系溶媒にはカルボニル化合物が不純物として残される。
接触処理Bにおいて用いられる亜硫酸水素ナトリウム水溶液は、その濃度によって、特に限定されないが、例えば、1重量%~溶解度、5重量%~溶解度、10重量%~溶解度、15重量%~溶解度、20重量%~溶解度、25重量%~溶解度、30重量%~溶解度、30重量%~35重量%などを選択することができる。なお、亜硫酸水素ナトリウム(NaHSO3)は、25℃における水への溶解度が約43~44重量%であり、20℃における亜硫酸水素ナトリウム水溶液のpHは、好ましくは3.0超過、より好ましくは3.5~5.0である。
α-ヒドロキシスルホン酸化合物は、ニトリル系溶媒の相よりも亜硫酸水素ナトリウム水溶液の相に多く溶解するので、亜硫酸水素ナトリウム水溶液の相をニトリル系溶媒の相から分離すると、ニトリル系溶媒からα-ヒドロキシスルホン酸化合物(すなわち、カルボニル化合物)を除去できる。このようにして不純物であるイミンを除去できる。
接触処理Cにおいて用いられるアルカリ性水溶液としては、水酸化ナトリウム水溶液、水酸化カリウム水溶液などのアルカリ金属水酸化物水溶液、水酸化カルシウム水溶液、水酸化ストロンチウム水溶液などのアルカリ土類金属水酸化物水溶液、アンモニア水、メチルアミン水溶液などを挙げることができる。これらのうち水酸化ナトリウム水溶液が好ましい。アルカリ性水溶液の濃度は、特に限定されないが、例えば、1重量%~溶解度、5重量%~溶解度、10重量%~溶解度、15重量%~溶解度、20重量%~溶解度、25重量%~溶解度、30重量%~溶解度、30重量%~35重量%などを選択することができる。なお、水酸化ナトリウムは、20℃における水への溶解度が約109g/100mlであり、水酸化カリウムは、25℃における水への溶解度が約110g/100mlである。
接触処理Dにおいて用いられる酸化剤としては、例えば、次亜塩素酸ナトリウム水溶液(アンチホルミン)、過酸化水素、酸素、空気、オゾンなどを挙げることができる。これらのうち、取り扱いが容易なので、酸素、空気が好ましい。
ニトリル系溶媒に酸化剤を接触させることにより、ニトリル系溶媒に含まれている不純物である共役ジエンなどが酸化される。共役ジエンの酸化を促進するという観点からは、気体状酸化剤を用いての接触処理Dを、亜硫酸水素ナトリウム水溶液の存在下にて行うことが好ましい。共役ジエンの酸化によって得られる生成物は、酸性水溶液との接触処理、亜硫酸水素ナトリウム水溶液との接触処理、若しくはアルカリ性水溶液との接触処理、または後述する蒸留処理によってニトリル系溶媒から除去することができる。
蒸留処理は、接触処理Cまたは接触処理Dを行った後に行うことが好ましい。蒸留処理は、公知の方法で行うことができる。蒸留処理において、ニトリル系溶媒を蒸発させ、N-イソブチルホルムアミドなどの高沸点物質を残渣として分離できる。
N-イソブチル-2-メチルプロパン-1-イミン2454ppm、イソブチルアルデヒド37ppm、2,5-ジメチルヘキサ-2,4-ジエン8ppm、およびN-イソブチルホルムアミド220ppmを不純物として含む粗イソブチロニトリルを用意した。
Claims (7)
- 不純物を含有するニトリル系溶媒に、pH3以下の酸性水溶液を接触させること、
酸性水溶液との接触を経たニトリル系溶媒に、亜硫酸水素ナトリウム水溶液を接触させること、および
亜硫酸水素ナトリウム水溶液との接触を経たニトリル系溶媒に、アルカリ性水溶液を接触させること
を含む、ニトリル系溶媒の精製方法。 - 不純物を含有するニトリル系溶媒、酸性水溶液との接触を経たニトリル系溶媒、亜硫酸水素ナトリウム水溶液との接触を経たニトリル系溶媒またはアルカリ性水溶液との接触を経たニトリル系溶媒に、酸化剤を接触させることをさらに含む、請求項1に記載の精製方法。
- アルカリ性水溶液との接触を経たニトリル系溶媒または酸化剤との接触を経たニトリル系溶媒を蒸留することをさらに含む、請求項1または2に記載の精製方法。
- 酸性水溶液が、塩酸である、請求項1~3のいずれかひとつに記載の精製方法。
- アルカリ性水溶液が、水酸化ナトリウム水溶液である、請求項1~4のいずれかひとつに記載の精製方法。
- ニトリル系溶媒が、イソブチロニトリルである、請求項1~5のいずれかひとつに記載の精製方法。
- イミンを不純物として含有するニトリル系溶媒に、pH3以下の酸性水溶液を接触させることで、不純物であるイミンをカルボニル化合物に変換し、
次いで酸性水溶液との接触を経たニトリル系溶媒に、カルボニル化合物除去処理を施すこと
を含む、ニトリル系溶媒の精製方法。
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EP19760953.0A EP3760612B1 (en) | 2018-02-27 | 2019-02-26 | Method for purifying nitrile solvent |
CN201980014926.7A CN111757865B (zh) | 2018-02-27 | 2019-02-26 | 腈系溶剂的纯化方法 |
CA3091101A CA3091101C (en) | 2018-02-27 | 2019-02-26 | Method for purifying nitrile solvent |
US16/975,317 US11858881B2 (en) | 2018-02-27 | 2019-02-26 | Method for purifying nitrile solvent |
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- 2018-02-27 JP JP2018033238A patent/JP6405064B1/ja active Active
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- 2019-02-26 CN CN201980014926.7A patent/CN111757865B/zh active Active
- 2019-02-26 MA MA052430A patent/MA52430A/fr unknown
- 2019-02-26 KR KR1020207023664A patent/KR102529310B1/ko active IP Right Grant
- 2019-02-26 WO PCT/JP2019/007306 patent/WO2019167940A1/ja unknown
- 2019-02-26 CA CA3091101A patent/CA3091101C/en active Active
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- 2019-02-26 EP EP19760953.0A patent/EP3760612B1/en active Active
- 2019-02-27 TW TW108106813A patent/TWI788534B/zh active
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JPS5132518A (ja) | 1974-09-06 | 1976-03-19 | Mitsubishi Chem Ind | Asetonitorirunoseiseiho |
JPS5268118A (en) | 1975-11-21 | 1977-06-06 | Mitsui Toatsu Chem Inc | Preparation of acrylamide |
JPS54151915A (en) | 1978-05-22 | 1979-11-29 | Mitsui Toatsu Chem Inc | Purification of acrylonitrile |
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JPH0525112A (ja) | 1991-07-16 | 1993-02-02 | Asahi Chem Ind Co Ltd | アセトニトリルの精製方法 |
JPH0532605A (ja) | 1991-08-01 | 1993-02-09 | Asahi Chem Ind Co Ltd | アセトニトリル精製法 |
JPH06329610A (ja) | 1993-05-25 | 1994-11-29 | Asahi Chem Ind Co Ltd | 高純度アセトニトリル及び粗アセトニトリルの精製方法 |
JPH0812640A (ja) | 1994-06-27 | 1996-01-16 | Asahi Chem Ind Co Ltd | 超高純度アセトニトリルおよび粗アセトニトリルの精製方法 |
JPH107638A (ja) | 1996-06-20 | 1998-01-13 | Nitto Chem Ind Co Ltd | ニトリルの精製方法 |
JP2000016978A (ja) | 1998-06-30 | 2000-01-18 | Mitsui Chemicals Inc | ニトリルの精製方法 |
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CA3091101A1 (en) | 2019-09-06 |
JP2019147760A (ja) | 2019-09-05 |
EP3760612A4 (en) | 2021-11-24 |
JP6405064B1 (ja) | 2018-10-17 |
CN111757865A (zh) | 2020-10-09 |
CN111757865B (zh) | 2023-08-25 |
EP3760612B1 (en) | 2024-04-17 |
TW201936571A (zh) | 2019-09-16 |
KR20200110394A (ko) | 2020-09-23 |
EP3760612A1 (en) | 2021-01-06 |
US11858881B2 (en) | 2024-01-02 |
US20200399207A1 (en) | 2020-12-24 |
MA52430A (fr) | 2021-01-06 |
KR102529310B1 (ko) | 2023-05-03 |
TWI788534B (zh) | 2023-01-01 |
CA3091101C (en) | 2022-07-19 |
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