Startup method for preparing light aromatic hydrocarbon by reforming raffinate oil

The invention belongs to the technical field of catalytic reforming, and particularly provides a startup method for preparing light aromatic hydrocarbon by reforming raffinate oil, and the method comprises the following steps: drying a catalyst, carrying out special gradient temperature control reduction under the condition of low hydrogen partial pressure, and then carrying out high-temperature reduction under the condition of high hydrogen partial pressure. The method can reduce the water generation speed in the reduction process of the catalyst, greatly reduce the high peak value of reduction generated water, reduce the influence of water generated in the reduction process on the catalyst, reduce the activity of the catalyst in the initial reaction stage, reduce the content of heavy aromatics in reactants, improve the stability of the catalyst and prolong the service life of the catalyst. 本发明属于催化重整技术领域，具体提供一种重整抽余油制备轻质芳烃的开工方法，将催化剂干燥后在低氢分压条件下进行特殊的梯度控温还原，随后再进行高氢分压下的高温还原。该法能够降低催化剂还原过程中水生成速度，大幅度降低还原生成水的高峰值，减少还原