摘要:
The object of the present invention is to obtain a highly soluble and colorless acrylamide polymer having a high molecular weight. A method for producing such acrylamide polymer involves comprises steps of: hydrating acrylonitrile containing oxazole at a concentration of 5 mg/kg or less and hydrogen cyanide at a concentration of 1 mg/kg or less by an enzymatic method to yield acrylamide; andt polymerizing monomers containing acrylamide.
摘要:
Provided is a method for producing a compound using a biocatalyst. In the method for continuously producing a compound using a biocatalyst in one or a plurality of reaction tanks, the downstream reaction temperature is set higher than the upstream reaction temperature of the flow of the catalyst in a reaction tank or between reaction tanks.
摘要:
A method for producing acrylamide from acrylonitrile by a biocatalyst method, wherein both evaporation of acrylonitrile into a gas phase and damaging of a catalyst by stirring are prevented, is provided. In the present invention, the production of acrylamide from acrylonitrile by the biocatalyst method comprises feeding acrylonitrile into an aqueous medium comprising a microbial catalyst.
摘要:
A method for producing acrylamide from acrylonitrile by a biocatalyst method, wherein both evaporation of acrylonitrile into a gas phase and damaging of a catalyst by stirring are prevented, is provided. In the present invention, the production of acrylamide from acrylonitrile by the biocatalyst method comprises feeding acrylonitrile into an aqueous medium comprising a microbial catalyst.
摘要:
There is provided a powdery S,S-EDDS iron complex improved in its caking property. An S,S-ethylenediamine-N,N′-disuccinic acid iron complex, which is crystalline and has an average particle diameter of from 10 to 1000 μm and a water content of not more than 7% by weight, a powdery S,S-ethylene-N,N′-disuccinic acid (S,S-EDDS) iron complex having a compressive strength of not more than 1 kg/cm2, the compressive strength being measured according to JIS A 1108 after a lapse of 2 months under conditions of a temperature of 50° C. and a load of 300 g/cm2, and a process for producing the same.
摘要翻译:提供粉末状S,S-EDDS铁络合物,其结块性能得到改善。 S,S-乙二胺-N,N'-二琥珀酸铁络合物,其结晶,平均粒径为10〜1000μm,水含量为7重量%以下,粉末状S,S 亚乙基-N,N'-二琥珀酸(S,S-EDDS)铁络合物,抗压强度不超过1kg / cm 2,抗压强度根据JIS A 1108 在温度为50℃,负荷为300g / cm 2的条件下经过2个月及其制造方法。
摘要:
Provided is a process for producing acrylamide with good storage stability and improved acrylamide polymer physical properties using a microbial catalyst. A microbial catalyst having catalytic activity to convert from acrylonitrile to acrylamide is washed with an aqueous acrylic acid solution, and then the washed microbial catalyst is used for the conversion reaction, so that the production of the above acrylamide is achieved.
摘要:
Crystals of [S,S]-ethylenediamine-N,N′-disuccinic acid which have a bulk density of 0.45 to 1.2 g/cm3, and a process for obtaining these crystals comprising the steps of adjusting an aqueous solution of an [S,S]-ethylenediamine-N,N′-disuccinic acid metal salt to a temperature of 40 to 80° C. and a pH of 1.9 to 4.5, and cooling the solution to a temperature below 40° C. over a period of 0.2 to 10 hours while supplying a mineral acid so as to maintain the pH at 1.9 to 4.5 to precipitate [S,S]-ethylenediamine-N,N′-disuccinic acid in a high yield.
摘要:
Crystals of [S,S]-ethylenediamine-N,N′-disuccinic acid which have a bulk density of 0.45 to 1.2 g/cm3, and a process for obtaining these crystals comprising the steps of adjusting an aqueous solution of an [S,S]-ethylenediamine-N,N′-disuccinic acid metal salt to a temperature of 40 to 80° C. and a pH of 1.9 to 4.5, and cooling the solution to a temperature below 40° C. over a period of 0.2 to 10 hours while supplying a mineral acid so as to maintain the pH at 1.9 to 4.5 to precipitate [S,S]-ethylenediamine-N,N′-disuccinic acid in a high yield.