| 发明名称 | Device and process for crystallizing (meth)acrylic acid | ||
| 摘要 | A crystallization device and a crystallization process are provided for obtaining (meth)acrylic acid with higher purity without causing leakage of a crude solution by preventing complete clogging in a crystallization tube from occurring. The device for crystallizing (meth)acrylic acid includes a crude (meth)acrylic acid solution supply part, a crystallization tube, a heat medium supply tube, a heat medium discharge tube, a storage part of a crude (meth)acrylic acid solution passed through the crystallization tube, a tube for circulating and supplying the crude (meth)acrylic acid solution to the supply part from the storage part, and a pump for circulating and supplying the crude (meth)acrylic acid solution to the supply part from the storage part, and also includes a pressure meter in the circulate-supply tube. The device is used for carrying out dynamic crystallization in a batch manner by circulating the crude (meth)acrylic acid solution to flow the crude solution downward along the inner wall of the crystallization tube in a coating film-like state. | ||
| 申请公布号 | US8859809(B2) | 申请公布日期 | 2014.10.14 |
| 申请号 | US201013381449 | 申请日期 | 2010.06.24 |
| 申请人 | Nippon Shokubai Co., Ltd. | 发明人 | Sakamoto Kazuhiko;Ueno Koji;Ishii Yoshitake;Kitaura Masatsugu |
| 分类号 | C07C51/42;B01D9/00;C07C51/43 | 主分类号 | C07C51/42 |
| 代理机构 | Wenderoth, Lind & Ponack, L.L.P. | 代理人 | Wenderoth, Lind & Ponack, L.L.P. |
| 主权项 | 1. A process for crystallizing (meth)acrylic acid using a device for crystallizing (meth)acrylic acid, wherein the device for crystallizing (meth)acrylic acid includes: a crude (meth)acrylic acid solution supply part, a crystallization tube, a heat medium supply tube, a heat medium discharge tube, a storage part of a crude (meth)acrylic acid solution passed through the crystallization tube, a tube for circulating and supplying the crude (meth)acrylic acid solution to the supply part from the storage part, and a pump for circulating and supplying the crude (meth)acrylic acid solution to the supply part from the storage part; and a pressure meter in the circulate-supply tube, the device being used for carrying out dynamic crystallization in a batch manner by circulating the crude (meth)acrylic acid solution to flow the crude solution downward along the inner wall of the crystallization tube in a coating film-like state, said process for crystallizing (meth)acrylic acid comprising: decreasing a circulation flow rate of the crude (meth)acrylic acid solution to the supply part from the storage part when the pressure value measured by the pressure meter exceeds a predetermined value. | ||
| 地址 | Osaka JP | ||