| 发明名称 | Process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P | ||
| 摘要 | A process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P whose acrylic acid content is at least 10% by weight and which, based on the weight of the acrylic acid present therein, additionally comprises at least 100 ppm by weight of propionic acid and at least 100 ppm by weight of glyoxal, in which at least one chemical compound of the element copper is added to the liquid phase P, and the resulting liquid phases P to which a chemical compound of the element copper has been added. | ||
| 申请公布号 | US9096513(B2) | 申请公布日期 | 2015.08.04 |
| 申请号 | US201113253245 | 申请日期 | 2011.10.05 |
| 申请人 | BASF SE | 发明人 | Blum Till;Zurowski Peter;Korn Tobias Johannes;Haremza Sylke;Friese Thorsten;Martin Friedrich-Georg;Jäger Ulrich;Rissel Steffen;Schliephake Volker |
| 分类号 | C07C51/50 | 主分类号 | C07C51/50 |
| 代理机构 | Oblon, McClelland, Maier & Neustadt, L.L.P. | 代理人 | Oblon, McClelland, Maier & Neustadt, L.L.P. |
| 主权项 | 1. A process, comprising: adding at least one chemical compound that comprises copper to a liquid phase P, said liquid phase P comprises acrylic acid, propionic acid, and glyoxal, thereby inhibiting free-radical polymerization of acrylic acid in liquid phase P, wherein said acrylic acid is present in said liquid phase P in an amount of at least 10% by weight of said liquid phase P, said propionic acid is present in said liquid phase P in an amount of at least 100 ppm by weight, said glyoxal is present in said liquid phase P in an amount of at least 100 ppm by weight, and each copper atom of the at least one chemical compound has an oxidation state of +1 or +2. | ||
| 地址 | Ludwigshafen DE | ||