WO2007116824A1 - アクリルアミドの製造方法 - Google Patents
アクリルアミドの製造方法 Download PDFInfo
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- WO2007116824A1 WO2007116824A1 PCT/JP2007/057103 JP2007057103W WO2007116824A1 WO 2007116824 A1 WO2007116824 A1 WO 2007116824A1 JP 2007057103 W JP2007057103 W JP 2007057103W WO 2007116824 A1 WO2007116824 A1 WO 2007116824A1
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- acrylamide
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/02—Amides, e.g. chloramphenicol or polyamides; Imides or polyimides; Urethanes, i.e. compounds comprising N-C=O structural element or polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/52—Amides or imides
- C08F20/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F20/56—Acrylamide; Methacrylamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/42—Nitriles
- C08F220/44—Acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
Definitions
- the present invention relates to a method for producing acrylamide, and more specifically, acrylamide is efficiently hydrated by a microbial cell containing a nitrile hydratase to produce acrylamide with excellent quality. Regarding the method.
- a method of hydrating acrylonitrile for example, a method of hydrating with a metallic copper catalyst such as Raney copper or a microbial cell containing nitrile hydratase.
- a hydration reaction method using a treated product of the microbial cells as a catalyst is known.
- acrylamide obtained by such a reaction is mainly used as a raw material for acrylamide polymers.
- acrylamide polymers have been required to have higher quality.
- flocculants there are flocculants in the use of acrylamide polymers, but acrylamide polymers used as flocculants have recently been required to have higher molecular weight while maintaining water solubility in accordance with the demand for improved performance. It has been.
- acrylamide polymers have applications such as paper additives, but as these paper additives, polymers with better color tone are required to further improve the quality of the paper obtained. ing.
- the quality of acrylamide obtained by a cell catalyst containing nitrile hydratase, etc., and certain lamellar polyacrylamides can be used as a method to improve the quality of cyanuric acid in nitrile compounds.
- a method for producing an amide compound in which nitrile hydratase is allowed to act on a nitrile compound see, for example, Patent Document 1
- oxazole and hydrocyanic acid contained in acrylonitrile as impurities are reduced.
- a method for converting acrylonitrile into acrylamide and producing an acrylamide polymer from the acrylamide for example, Patent Document 2 is known.
- Patent Document 1 Japanese Patent Laid-Open No. 11-123098
- Patent Document 2 Pamphlet of International Publication No. 2004/090148
- An object of the present invention is to provide a method for producing acrylamide with higher efficiency and higher quality by using a microbial catalyst containing nitrile hydratase or the like.
- the inventors of the present invention have studied the above-mentioned problems, and are the same in producing acrylamide by hydrating acrylonitrile with a microbial cell containing nitrile hydratase or a treated product thereof.
- the reaction is carried out in the presence of a compound having an active methylene group in the molecule and / or a salt of the compound, the catalytic activity of nitrile hydratase can be maintained, and high-quality acrylamide can be obtained.
- the present invention has been completed.
- the method for producing acrylamide of the present invention comprises:
- a microbial cell containing nitrile acrylyl, a nitrile hydratase, or a treated product thereof It is characterized by the hydration reaction.
- the compound having an active methylene group in the molecule includes dimedone, barbituric acid, hydride. Preferred is at least one compound selected from the group consisting of enttoin.
- the salt of the compound having an active methylene group in the molecule is preferably a salt of at least one compound selected from dimedone, barbituric acid, and hydantoin.
- acrylamide with higher efficiency and higher quality can be produced using a microbial catalyst containing nitrile hydratase.
- Acrylonitrile used in the present invention is not particularly limited.
- the acrylamide of the present invention can be obtained by performing a hydration reaction using the above acrylonitrile as a raw material and a microbial cell containing nitrile hydratase and a treated product thereof as a catalyst.
- nitrile hydratase refers to an enzyme having an ability to hydrolyze a nitrile compound to produce a corresponding amide compound.
- a microorganism containing nitrile hydratase nitrile hydratase having the ability to hydrolyze the nitrile compound to produce a corresponding amide compound is produced, and the nitrile hydratase is used in an acrylamide aqueous solution.
- the microorganism is not particularly limited as long as it retains the activity of the target.
- the genus Nocardia the genus Corynebacterium, the genus Bacillus, the thermophilic Bacillus, the genus Pseudomonas, the genus Micrococcus, Rhodoc occus, Acinetobacter, Xanthobacter, Streptomyces, Rhizobium, Klebsiella typified by Rhodochrous species Represented by the genus Enterobacter, Erwinia, Aeromonas, Citrobacter, Achromobacter, Agrobacterium or thermophila Ru
- a preferable example is a microorganism belonging to the genus Pseudonocardia.
- a transformant in which a nitrile hydratase gene cloned from the microorganism is expressed in an arbitrary host is also included in the microorganism referred to in the present invention.
- Escherichia coli can be mentioned as a representative example as in the examples described later, but not limited to Escherichia coli, and Bacillus subtilis and other Bacillus subtilis.
- Other microbial strains such as genera, yeasts and actinomycetes are also included.
- MT-1 0822 (This strain was founded on February 7, 1996 in Tsukuba Rakuhito 1-chome 1-3, Tsukuba, Ibaraki Pref.
- the microorganism or a treated product of the microorganism is usually used.
- the microbial cells may be prepared using a general method known in the fields of molecular biology, biotechnology, and genetic engineering. For example, after inoculating the microorganism in a normal liquid medium such as LB medium or M9 medium, an appropriate culture temperature (generally 20 ° C to 50 ° C, but in the case of thermophilic bacteria 50 ° C C. or higher), followed by separation and recovery of the microorganism from the culture solution by centrifugation.
- the treated microbial cell product in the present invention is obtained by separating and purifying the microbial cell extract or ground product, and the nitrile hydratase active fraction of the extract or ground product.
- This refers to an isolated product, an isolated product obtained by immobilizing a microbial cell extract, a ground product, a post-segregated product using an appropriate carrier, and the like, which have nitrile hydratase activity. As long as it is present, it corresponds to the treated bacterial cell of the present invention. These may be of a single type, or two or more different types may be used simultaneously or alternately. [Compounds having an active methylene group, etc.]
- the active methylene group contained in the above compound is, for example, Organic Reactions Vol.l5 (19
- R represents an alkyl group
- Ar represents an aryl group.
- salts of these compounds such as potassium salt, sodium salt, magnesium salt, calcium salt and the like can also be used.
- dimedone, barbituric acid, hydantoin, and barbituric acid and barbituric acid salts which are preferred because of their effectiveness and availability, are effective. To more preferable.
- the above compound and salt may be used in combination.
- the above compounds may be used alone or in combination of two or more, and the above salts may be used alone.
- Two or more types may be used in combination.
- the abundances of these compounds and salts are not particularly limited, but in order to improve the quality of the obtained acrylamide and to prevent an excessive load in the purification process of acrylamide,
- the abundance is usually in the range of 10 to 10,000 ppm by weight, preferably in the range of 50 to 5,000 ppm by weight, based on the total weight of the reaction solution.
- acrylic nitrile is usually subjected to a hydration reaction with the above-mentioned cells in an aqueous medium.
- the aqueous medium in the present invention is water or a buffering agent such as phosphate, inorganic salt such as sulfate or carbonate, alkali metal hydroxide, amide compound or the like dissolved in an appropriate concentration. Add the aqueous solution.
- the concentration of acrylonitrile in the aqueous medium is a concentration equal to or higher than the saturated concentration of the nitrile compound at the start of the reaction.
- the upper limit of the concentration is not particularly limited, but the supply of too much excess of nitrile compound may result in a reactor with a large amount of catalyst and excessive volume, and heat removal to complete the reaction. Therefore, an excessive heat exchanger is required for this, and the economic burden on the facilities increases.
- the supply concentration of acrylonitrile is more specific so that when it is all converted to the corresponding acrylamide, the theoretical concentration of the product solution is in the range of 40 to 80% by weight in the case of acrylamide. Is preferably supplied in an amount of 0.4 to 1.5 parts by weight per 1 part by weight of water.
- reaction time in the above reaction may also depend on conditions such as the amount of catalyst used and the temperature. Usually, when reacting using a plurality of reactors, per reactor:! It is a range of time, preferably each in the range of 2 to 40 hours.
- the amount of the catalyst used depends on the reaction conditions, the type of catalyst, and the form of the catalyst. Usually, the amount of the catalyst is 10 to 50,000 ppm by weight, preferably in terms of the weight of the reaction liquid in terms of the weight of the dried microorganism. More ⁇ 50 to 30000 ppm by weight.
- the hydration reaction can be performed under pressure in order to increase the solubility of the nitrile compound in an aqueous medium, which is usually performed at or near normal pressure.
- the reaction temperature is not particularly limited as long as it is above the freezing point of the aqueous medium, but it is usually preferable to perform the reaction in the range of 0 to 50 ° C, more preferably 10 It is in the range of ⁇ 40 ° C.
- the reaction can also be performed in a slurry state in which the product crystallizes in the reaction solution.
- the pH of the reaction solution during the hydration reaction is not particularly limited as long as the nitrile hydratase activity is maintained, but is preferably in the range of pH 6 to 10 and more Preferably pH 7-9 Range.
- Examples of the method for purification by removing the compound having an active methylene group and the reaction product of the compound and the like with impurities from the acrylamide obtained in the present invention include, for example, a method of contacting with an anion exchange resin. Can do.
- the anion exchange resin it is preferable to use a weakly basic, medium basic, or strong basic anion exchange resin that is not particularly limited as long as these compounds can be removed.
- anion exchange resin examples include Lebatit MP62 (trade name, manufactured by LANXESS), Diaion WA20 (trade name, manufactured by Mitsubishi Kasei), Dowex 66 (trade name, manufactured by Dow Chemical). Macroporous weakly basic resin such as
- Gel type weakly basic resin such as Levacit ⁇ C1059 (trade name, manufactured by LANXESS), gel type medium basic resin such as Levacit MP64 (trade name, manufactured by LANXESS) or Amberlite IRA68 (trade name, manufactured by Organo) Resin;
- Macroporous medium basic resin such as Dowex WRG2 (trade name, manufactured by Dow Chemical Company);
- Macroporous strong basic resins such as Levacit MP500 (trade name, manufactured by LANXESS); gel-type strong basic resins such as Amberlite IRA400 (trade name, manufactured by Organone).
- anion exchange resins may be used after sufficiently washing with water, but it is preferable to use them after pretreatment with a dilute aqueous alkali solution and then with sufficient washing with water.
- These resins can be used as a fixed layer such as a packed bed by continuously contacting and purifying an aqueous acrylamide solution, and can also be used in a batch system. However, it is preferably used as a fixed bed for reasons such as purification efficiency and ease of operation.
- Acrylamide thus obtained is excellent in quality, and when it is evaluated as an acrylamide polymer by polymerizing with acrylamide alone or copolymerized or with other monomers, water solubility is remarkably improved. A sufficiently high molecular weight can be obtained. Moreover, it is excellent in the color tone of the obtained polymer.
- acrylamide is homopolymerized or acrylamide is And can be copolymerized with other monomers.
- Unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid and their salts;
- N—N dimethylaminoalkyl (meth) acrylamides such as N—N-dimethylaminopropyl methacrylamide, N, N-dimethylaminopropyl atallamide, or their quaternary ammonium derivatives;
- Hydrophilic acrylamides such as acetone acrylamide, N, N dimethyl acrylamide, N, N dimethyl methacrylamide, N ethyl methacrylamide, N ethyl acrylamide, N, N decyl acrylamide, N propyl acrylamide;
- N- ( ⁇ -glycidoxyalkyl) (meth) acrylamide derivatives such as 5-glycidoxypentyl) acrylamide and N- (6-glycidoxyhexyl) acrylamide; Methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, lauryl
- (Meth) acrylate derivatives such as (meth) acrylate, 2-ethylhexyl (meth) acrylate, glycidyl (meth) atelate;
- Examples include acrylonitrile, methatalonitrile, butyl acetate, butyl chloride, vinylidene chloride, ethylene, propylene, butene and other olefins, styrene, trimethylstyrene, butadiene, isoprene, and methacrylamide.
- the mixing ratio in the case of copolymerizing acrylamide with these other monomers is not particularly limited, but the amount of other monomers is usually 100 mol or less per 100 mol of acrylamide. The amount is preferably 50 mol or less.
- Examples of polymerization methods for these monomers include aqueous solution polymerization and emulsion polymerization.
- the total concentration of acrylamide and other monomers added as necessary is usually 5 to 90% by weight.
- polymerization initiator for example, a radical polymerization initiator can be used.
- Peroxides such as potassium persulfate, ammonium persulfate, hydrogen peroxide, benzoyl peroxide; azobisisobutyronitrile, 2 -2'-azobis (4-amidinopropane) dihydrochloride, 4-4 '— Azo-based free radical initiators such as azobis (sodium 4-cyanovaleric acid); so-called redox catalysts using the above-mentioned peroxides together with reducing agents such as sodium bisulfite, triethanolamine and ferrous ammonium sulfate And dimethylaminopropionitrile
- the above polymerization initiators may be used alone or in combination of two or more.
- the amount of the polymerization initiator is usually in the range of 0.00 :! to 5% by weight based on the total weight of the monomers.
- the polymerization temperature is usually in the range of -10 to 120 ° C, more preferably in the range of 0 to 90 ° C.
- the polymerization temperature need not always be maintained at a constant temperature and may be changed as the polymerization progresses. Usually, however, the polymerization temperature tends to increase as the polymerization proceeds. Therefore, it may be cooled as necessary.
- the atmosphere during the polymerization is not particularly limited, but from the viewpoint of rapidly proceeding the polymerization, for example
- the polymerization is preferably performed in an inert gas atmosphere such as nitrogen gas.
- the polymerization time is not particularly limited, but is usually in the range of! To 20 hours.
- the pH of the aqueous solution at the time of polymerization is not particularly limited, but the polymerization may be performed by adjusting the pH if necessary.
- pH adjusters that can be used in this case include alkalis such as sodium hydroxide, potassium hydroxide and ammonia; mineral acids such as phosphoric acid, sulfuric acid and hydrochloric acid; organic acids such as formic acid and acetic acid.
- the molecular weight of the polymer obtained by the present invention is not particularly limited, but is usually in the range of 100,000 to 50 million, and preferably in the range of 500,000 to 30 million.
- the acrylamide polymer obtained in this way is excellent in the quality of the acrylamide obtained in the present invention, so that water solubility is remarkably improved, sufficiently high molecular weight is obtained, and color tone is also excellent. Therefore, this acrylamide polymer can be suitably used as a flocculant, a papermaking additive, a petroleum recovery agent and the like.
- Example 1 of Japanese Patent Application Laid-Open No. 2001-340091 No. 3 cloned cells were obtained and cultured in the same manner as in Example 1, and then wet bacteria containing nitrolyl hydratase. I got a body.
- a 1 L glass flask equipped with a stirrer was prepared as the first reactor, and a Teflon (registered trademark) tube 40 m having an inner diameter of 5 mm was prepared as the second reactor.
- the first reactor was charged with 400 g of water in advance.
- the wet cells obtained by the above culture method were suspended in pure water so as to be 12% by weight.
- the suspension was continuously fed at a rate of l lg / h while stirring in the first reactor.
- 31 g of acrylonitrile containing 30 wt ppm oxazole and 2 wt ppm acrolein Barbituric acid was added to pure water at a rate of / h, and a barbituric acid aqueous solution adjusted to 550 ppm by weight was continuously fed at a rate of 38 g / h.
- a 0.1 M NaOH aqueous solution was continuously fed so that the reaction pH was 7.5 to 8.5.
- the reaction solution is continuously withdrawn from the first reactor at a rate of 80 g / h and continuously fed to the second reactor. The reaction was further advanced in 2 reactors.
- Both the first reactor and the second reactor were immersed in a water bath having a temperature of 10 to 20 ° C, and the temperature was controlled so that the liquid temperature inside each reactor was 15 ° C.
- Example 2 Water was added to the acrylamide aqueous solution obtained in Example 1 to prepare an aqueous acrylamide solution having a concentration of 20% by weight. 500 g of this 20 wt% acrylamide aqueous solution was put into an 11 polyethylene container, and while maintaining the temperature at 18 ° C., dissolved oxygen in the liquid was removed through nitrogen, and immediately put into a heat insulation block made of foamed polystyrene.
- the acrylamide polymer hydrous gel thus obtained was taken out of a polyethylene container, divided into small chunks and ground with a meat grinder.
- the ground hydrogel containing acrylamide polymer was dried with hot air at 100 ° C. for 2 hours, and further pulverized with a high-speed rotary blade pulverizer to obtain a dry powdery acrylamide polymer.
- the obtained dry powdery acrylamide polymer was passed through a sieve and fractions of 32-42 mesh were collected.
- the fractionated acrylamide polymer was evaluated by the test method of acrylamide polymer of Example 5 described later. The results are shown in Table 1.
- a 0.1 M NaOH aqueous solution was added to the barbituric acid aqueous solution to prepare a sodium barbiturate aqueous solution so that the pH was 7.0.
- a 1 L glass flask equipped with a stirrer was prepared as a first reactor, and a Teflon (registered trademark) tube 40 m having an inner diameter of 5 mm was prepared as a second reactor.
- the first reactor was charged with 400 g of water in advance.
- the wet cells obtained by the culture method of Example 1 were suspended in pure water so as to be 12% by weight.
- This suspension was continuously fed at a rate of 1 lgZh while stirring in the first reactor.
- Acrylonitrile containing 30 ppm by weight of oxazole and 2 ppm by weight of acrolein was added at a rate of 3 lg / h, and the above sodium barbiturate aqueous solution was added to pure water to obtain 550 ppm by weight in terms of norbituric acid.
- a sodium barbiturate aqueous solution adjusted to be continuously fed at a rate of 38 gZh.
- an aqueous solution of 0.1% -NaOH was continuously fed so that the reaction pH was 7.5 to 8.5.
- the liquid level of the first reactor In order to keep the flow constant, the reaction solution is continuously withdrawn from the first reactor at a rate of 80 g / h, continuously fed to the second reactor, and the reaction proceeds further in the second reactor. It was.
- Both the first reactor and the second reactor were immersed in a water bath at a temperature of 10 to 20 ° C, and the temperature was controlled so that the liquid temperature inside each reactor was 15 ° C.
- Example 2 Using this aqueous acrylamide solution, the same operation as in Example 2 was performed to obtain an acrylamide polymer sample. The obtained acrylamide polymer sampnore was evaluated by the acrylamide polymer test method of Example 5 described later. The results are shown in Table 1.
- Example 1 was the same as Example 1 except that hydantoin was used instead of barbituric acid to prepare an aqueous solution.
- the wet cells obtained by the culture method of Example 1 were suspended in pure water so as to be 12% by weight. This suspension was continuously fed at a rate of 1 lgZh while stirring in the first reactor. Acrylonitrile containing 30 ppm by weight of oxazole and 2 ppm by weight of acrolein was continuously fed at a rate of 3 lg / h and pure water at a rate of 38 gZh. In addition, an aqueous solution of 0.1% -NaOH was continuously fed so that the reaction pH was 7.5 to 8.5. Furthermore, in order to keep the liquid level of the first reactor constant, the reaction solution is continuously withdrawn from the first reactor at a rate of 80 g / h, continuously fed to the second reactor, The reaction was further advanced in 2 reactors.
- Both the first reactor and the second reactor were immersed in a water bath at a temperature of 10 to 20 ° C, and the temperature was controlled so that the liquid temperature inside each reactor was 15 ° C.
- the polymer samples obtained in Examples 2, 3, and 4 and Comparative Example 1 were evaluated for water solubility, standard viscosity, and color tone by the following methods.
- Water-solubility is as follows: 1 Put 600ml of water in a beaker 2 While stirring at C, add 0.666 g of polymer sample (pure content of 0.6 g), stir at 400 rpm for 2 hours, filter the resulting solution through a 150 mesh wire mesh, and filter some of the insoluble matter. From the nature, water solubility was judged. In other words, ⁇ is completely dissolved, ⁇ is almost completely dissolved, ⁇ is undissolved, but there is an insoluble matter, ⁇ is what can be filtered out, and insoluble matter is filtered slowly. Let X, which is practically possible.
- Standard viscosity The filtrate obtained by the water solubility test above is a 0.1% by weight polymer aqueous solution. To this, sodium chloride equivalent to 1M concentration is added, and a BL adapter is used with a BL type viscometer. The viscosity was measured at 25 ° C and a rotor rotation speed of 60 rpm (standard viscosity). The standard viscosity obtained by such a method is conventionally used as a value correlated with the molecular weight.
- Color tone According to the color tone of the polymer, the polymer powder was visually evaluated.
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Priority Applications (4)
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KR1020087023780A KR101162810B1 (ko) | 2006-04-06 | 2007-03-30 | 아크릴아미드의 제조방법 |
JP2008509821A JP4975735B2 (ja) | 2006-04-06 | 2007-03-30 | アクリルアミドの製造方法 |
CN2007800114617A CN101410527B (zh) | 2006-04-06 | 2007-03-30 | 丙烯酰胺的制造方法 |
EP07740539A EP2003208A4 (en) | 2006-04-06 | 2007-03-30 | PROCESS FOR THE PREPARATION OF ACRYLAMIDE |
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JP (2) | JP4975735B2 (ja) |
KR (1) | KR101162810B1 (ja) |
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JP6020741B1 (ja) * | 2014-12-17 | 2016-11-02 | 三菱レイヨン株式会社 | アクリルアミド水溶液及びアクリルアミド系重合体の製造方法 |
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CN101654414B (zh) * | 2009-06-30 | 2012-09-12 | 山东宝莫生物化工股份有限公司 | 采用螺旋板式反应器制备丙烯酰胺的工艺 |
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JPS5473727A (en) * | 1977-11-18 | 1979-06-13 | Mitsubishi Chem Ind Ltd | Production of acrylamide |
SE449362B (sv) * | 1979-10-31 | 1987-04-27 | American Cyanamid Co | Akrylamid- och akrylsyrapolymerer innehallande en cyklisk organisk forening med en 1,3-diongrupp samt komposition och forfarande for framstellning derav |
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- 2007-03-30 KR KR1020087023780A patent/KR101162810B1/ko not_active IP Right Cessation
- 2007-03-30 EP EP07740539A patent/EP2003208A4/en not_active Withdrawn
- 2007-03-30 CN CN2007800114617A patent/CN101410527B/zh not_active Expired - Fee Related
- 2007-03-30 JP JP2008509821A patent/JP4975735B2/ja not_active Expired - Fee Related
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6020741B1 (ja) * | 2014-12-17 | 2016-11-02 | 三菱レイヨン株式会社 | アクリルアミド水溶液及びアクリルアミド系重合体の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN101410527A (zh) | 2009-04-15 |
KR20080105132A (ko) | 2008-12-03 |
EP2003208A2 (en) | 2008-12-17 |
EP2003208A4 (en) | 2012-03-28 |
JPWO2007116824A1 (ja) | 2009-08-20 |
EP2003208A9 (en) | 2009-05-06 |
KR101162810B1 (ko) | 2012-07-05 |
JP2012061010A (ja) | 2012-03-29 |
JP4975735B2 (ja) | 2012-07-11 |
CN101410527B (zh) | 2012-07-04 |
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