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    • 8. 发明公开
    • SOLID PHOSPHORIC ACID CATALYST, AND METHOD FOR PRODUCING TRIOXANE
    • 固体磷酸催化剂和生产三氧杂环己烷的方法
    • EP2998023A1
    • 2016-03-23
    • EP14797038.8
    • 2014-04-15
    • Clariant Catalysts (Japan) K.K.
    • NAKAO, HiroakiKUBOTA, YutakaCHEN, Xin
    • B01J29/06B01J27/182B01J35/10B01J37/08C07D323/06C07B61/00
    • B01J27/182B01J21/12B01J21/16B01J27/16B01J35/002B01J35/023B01J35/08B01J35/1009B01J35/1014B01J37/0201B01J37/082C07D323/06
    • Provided is a solid phosphoric acid catalyst which, when gas-phase synthesizing trioxane from formaldehyde, obtains trioxane at a high yield and at a high selection rate by markedly suppressing side reactions, and which reduces the adhesion of organic matter to the catalyst surface, and achieves a stable and long-term catalyst reaction. This solid phosphoric acid catalyst contains silicon phosphate oxide (SPO) obtained by sintering at a temperature of at least 200°C a carrier material to which a phosphoric acid component has been added, and the total quantity of acid does not exceed 5mmol per 1g of solid phosphoric acid catalyst when calculated as acid quantity determined by NH 3 -TPD measurement. The average specific surface area of the solid phosphoric acid catalyst preferably does not exceed 20m 2 /g, the carrier is preferably selected from porous silica, aluminum hydrosilicate, or diatomaceous earth, and the SPO is preferably a dehydrated composite compound of the aforementioned carrier and a phosphoric acid selected from orthophosphoric acid, pyrophosphoric acid or polyphosphoric acid, or a precursor thereof.
    • 本发明提供一种固体磷酸催化剂,其在从甲醛气相合成三烷时通过显着抑制副反应以高收率和高选择率得到三烷,并且降低了有机物对催化剂表面的附着, 实现了稳定和长期的催化剂反应。 该固体磷酸催化剂含有通过在至少200℃的温度下烧结添加有磷酸成分的载体材料而获得的磷酸硅氧化物(SPO),并且酸的总量不超过5mmol / 1g 当以通过NH 3 -TPD测量确定的酸量计算时为固体磷酸催化剂。 固体磷酸催化剂的平均比表面积优选不超过20m 2 / g,载体优选选自多孔二氧化硅,氢硅酸铝或硅藻土,并且SPO优选为前述载体和 选自正磷酸,焦磷酸或多磷酸的磷酸或其前体。