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本发明涉及含铜离子的(甲基)丙烯酸水溶液在共沸蒸馏过程中,通过加入不超过0.1%的甲醛,从而减少精馏设备腐蚀的方法。
The present invention relates to a method of reducing corrosion of a distillation apparatus by adding no more than 0.1% formaldehyde during the azeotropic distillation of an aqueous (meth) acrylic acid solution containing copper ions.