发明名称 |
método para cristalização de ácido (met)acrílico e método para regular o teor de inibidor de polimerização em ácido (met)acrílico de produto |
摘要 |
PROBLEM There is provided a melting method of (meth)acrylic acid crystal which is capable of providing a higher quality of (meth)acrylic acid without carrying out an additional purification treatment to (meth)acrylic acid obtained by a crystallization operation accompanied by melting of (meth)acrylic acid. In addition, there is provided a simple method for adjusting a content of polymerization inhibitor in a product (meth)acrylic acid. SOLUTION In the crystallization method melting (meth)acrylic acid crystal while wetting with the crystalline molten liquid, a polymerization inhibitor is added to a molten liquid melted after initiation of melting, and all of crystal is melted while circulating and feeding the molten liquid containing said polymerization inhibitor to the crystal. In addition, a content of polymerization inhibitor in product (meth)acrylic acid is adjusted by adding a predetermined amount of polymerization inhibitor corresponding to a product specification to the molten liquid melted after initiation of melting. |
申请公布号 |
BRPI1011858(A2) |
申请公布日期 |
2016.03.29 |
申请号 |
BR2010PI11858 |
申请日期 |
2010.05.27 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
HARUNORI HIRAO;KAZUHIKO SAKAMOTO;KOJI UENO;SATOSHI NAKAGAWA;YOSHITAKE ISHII |
分类号 |
C07C51/50;C07C51/43;C07C57/07;C07C57/075 |
主分类号 |
C07C51/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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