发明名称 |
PROCESS FOR PRODUCTION OF A SILICA-SUPPORTED ALKALI METAL CATALYST |
摘要 |
A process for regenerating a silica-supported depleted alkali metal catalyst is described. The level of alkali metal on the depleted catalyst is at least 0.5 mol % and the silica support is a zero-gel. The process comprises the steps of contacting the silica supported depleted alkali metal catalyst with a solution of a salt of the alkali metal in a solvent system that has a polar organic solvent as the majority component. A re-impregnated catalyst prepared by the process of the invention any comprising a silicazero-gel support and a catalytic metal selected from an alkali metal in the range 0.5-5 mol % on the catalyst, wherein the surface area of the silica support is <180 m2/g is also described. The invention is applicable to a process for preparing an ethylenically unsaturated acid or ester comprising contacting an alkanoic acid or ester of the formula R1—CH2—COOR3, with formaldehyde or a suitable source of formaldehyde. |
申请公布号 |
US2015238942(A1) |
申请公布日期 |
2015.08.27 |
申请号 |
US201314432430 |
申请日期 |
2013.10.01 |
申请人 |
LUCITE INTERNATIONAL UK LIMITED |
发明人 |
York Ian Andrew;Morris Trevor Huw |
分类号 |
B01J23/92;B01J38/64;C07C51/353;B01J23/04 |
主分类号 |
B01J23/92 |
代理机构 |
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代理人 |
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主权项 |
1. A process for regenerating a silica-supported depleted alkali metal catalyst wherein a level of alkali metal on the depleted catalyst is at least 0.5 mol %, and
wherein the silica support is a zero-gel comprising the step of: contacting said silica supported depleted alkali metal catalyst with a solution of a salt of the alkali metal in a solvent system that has a polar organic solvent as the majority component. |
地址 |
Southampton GB |