Method for removing impurity elements

The invention discloses a method for removing impurity elements. The method for removing the impurity elements comprises the following steps: carrying out a reaction on a mixed slurry of a solid matter and water under sealed microwave heating, the solid matter comprises an organic solid matter, and the organic solid matter contains one or more miscellaneous elements of chlorine, nitrogen and sulfur; the reaction temperature is 210-260 DEG C, the reaction pressure is not less than 1.5 MPa, the water phase in the reaction is in a subcritical state, and the pH value of the mixed slurry is not higher than 10. According to the method, the loss of combustible components is reduced while impurity elements are effectively removed, the raw material cost is low, and the problem that waste liquid is difficult to treat is solved. 本发明公开了一种脱除杂元素的方法。本发明的脱除杂元素的方法包括如下步骤：固形物和水的混合浆料在密封的微波加热下进行反应，即可；所述固形物包括有机固形物，所述有机固形物含氯、氮和硫中的一种或多种杂元素；所述反应的温度为210～260℃，所述反应的压力不小于1.5MPa，所述反应中水相处于亚临界态，所述混合浆料的pH不高于10。本发明在有效脱除杂元素的同时减少可燃组分的损失，且原材料成本低