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公开(公告)号:US06759560B2
公开(公告)日:2004-07-06
申请号:US10148929
申请日:2002-06-05
申请人: Josef Guth , Holger Friedrich , Hans-Josef Sterzel , Gerd Kaibel , Kirsten Burkart , Elke Hoffmann
发明人: Josef Guth , Holger Friedrich , Hans-Josef Sterzel , Gerd Kaibel , Kirsten Burkart , Elke Hoffmann
IPC分类号: C07C3130
CPC分类号: B01D3/141 , B01D1/2856 , C07C29/70 , C07C31/30
摘要: Alkali metal methoxides are prepared from aqueous alkali metal hydroxide, which may have been admixed with methanol, and methanol in a reaction column having at least 5, preferably from 15 to 30, theoretical plates between the feed point for the aqueous alkali metal hydroxide and the feed point for the methanol. The gaseous methanol/water mixture formed in the reaction is fractionated in a rectification column. In one variant of the invention, the trays chosen for the reaction column configured as a bubble cap tray, valve tray or sieve tray column are trays in which not more than 5%, preferably
摘要翻译: 碱金属甲醇盐由碱金属氢氧化物水溶液制成,碱金属氢氧化物可与甲醇混合,甲醇在反应塔中具有至少5个,优选15至30个理论塔板的碱金属氢氧化物水溶液和 甲醇的进料点。 在反应中形成的气态甲醇/水混合物在精馏塔中分馏。在本发明的一个变体中,为构成气泡盖,阀盘或筛板塔的反应塔选择的塔板是不在其中的托盘 超过5%,优选<1%的液体通过相应的托盘。在本发明方法的另一变型中,双壁反应塔的双壁温度为3至10℃ 高于柱内部温度,并且具有随机或有序填料,其中液体流量与蒸气流量的平均比率在塔的所有子区域中不超过15%以上,优选不超过3% 截面对应于总柱横截面的2%以上。