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Process for producing high-quality acrylamide polymer with enzyme

A kind of technology of acrylamide system and manufacturing method, applied in directions such as fermentation

Inactive Publication Date: 2008-03-19
MITSUBISHI CHEM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In these documents, various conditions in the production method of acrylamide have been studied, but they have not been studied from the viewpoint of the color tone of the acrylamide polymer.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0045] (1) Modulation of immobilized bacterium

[0046] Utilize the culture medium (pH7.0) containing 2% glucose, 1% urea, 0.5% peptone, 0.3% yeast extract, 0.05% cobalt chloride to cultivate under aerobic conditions with nitrile hydratase activity Rhodococcus rhodochrous J-1 strain (FERMBP-1478). After the completion of the culture, the cultured bacterium was recovered by centrifugation, and washed with 50 mM phosphate buffer (pH 7.0). The above-mentioned buffer solution was added to the washed bacterial cells to form a bacterial cell suspension (20% in terms of dry bacterial cells). Add acrylamide, methylenebisacrylamide and 2-dimethylaminopropyl methacrylamide concentration to 500g of this bacterium suspension and be respectively 500g of monomer mixed aqueous solutions of 20, 2 and 2%, and evenly suspend turbidity. 2g of 5% ammonium persulfate and 2g of 50% N,N,N,N-tetramethylethylenediamine were added thereto for polymerization and gelation. After cutting it into a cub...

Embodiment 2

[0070] (1) Production and evaluation of acrylamide-based polymers

[0071] Mix 192 parts of 50% acrylamide aqueous solution prepared according to Example 1, 8 parts of ion-exchanged water and 0.18 parts of chain transfer agent nitrilotripropionic acid amide, adjust to pH 10 with 0.1 equivalent of NaOH aqueous solution, then add 0.5 1% methanol solution of photoinitiator benzoin diethyl ether was dissolved. The light was blocked, and the polymerization solution was replaced with nitrogen. Use a tray made of SUS as a polymerization container, install a glass plate on the upper part, and transfer the polymerization solution after nitrogen substitution to the tray container placed on a water bath at a water bath temperature of 20°C under a nitrogen atmosphere to make the film thickness 5mm, and from above Photoinitiated sheet polymerization was carried out by irradiating Chemicullamp (Toshiba FL-20S-BL). The condition of photopolymerization is that the light intensity used is 1.0W...

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Abstract

A process for producing an acrylamide polymer which has a high molecular weight and is highly soluble and colorless. The process for acrylamide polymer production comprises hydrating acrylonitrile having an oxazole concentration of 5 mg / kg or lower and a hydrocyanic acid concentration of 1 mg / kg or lower by an enzymatic method to yield acrylamide and polymerizing one or more monomers comprising the acrylamide.

Description

technical field [0001] The present invention relates to a method for producing high-quality acrylamide-based polymers suitable for coagulants, thickeners for papermaking, and the like using an enzyme-catalyzed method. Background technique [0002] Acrylamide-based polymers are used as coagulants, thickeners for papermaking, and the like, but in any of these applications, acrylamide-based polymers with high molecular weight, high solubility, and a color tone close to colorless are required. [0003] For example, when using an acrylamide-based polymer as a coagulant, if the molecular weight of the acrylamide-based polymer is low, there will be a problem of coagulation, and if an acrylamide-based polymer with poor solubility is used, the processing time will be delayed. question. In addition, when used as a thickener for papermaking, if an acrylamide polymer having poor solubility is used, problems such as transparent spots appear on the papermaking. In addition, regardless o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P13/02C08F20/56
CPCC12P13/02C08F20/56
Inventor 村尾耕三石井胜男加纳诚番场启泰
Owner MITSUBISHI CHEM CORP
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