申请人:Rhodia Operations
公开号:US20170183283A1
公开(公告)日:2017-06-29
The process allows the preparation of a p-hydroxymandelic compound, comprising at least one step of condensation of at least one aromatic compound bearing at least one hydroxyl group and whose para position is free, with glyoxylic acid, the condensation reaction being performed in at least one reactor equipped with at least one mixing means, the specific mixing power being between 0.1 kW/m
3
and 15 kW/m
3
. In addition, the invention also relates to a process for preparing a 4-hydroxyaromatic aldehyde by oxidation of this p-hydroxymandelic compound.
该过程允许制备一种p-羟基苯乙酸化合物,包括至少一步将至少一种带有至少一个羟基且对位空闲的芳香化合物与乙醛酸进行缩合的步骤,缩合反应在至少一个配备至少一个混合手段的反应器中进行,具体混合功率在0.1 kW/m3和15 kW/m3之间。此外,该发明还涉及通过氧化该p-羟基苯乙酸化合物制备4-羟基芳香醛的过程。