Work starting method for hydrogenation process

Abstract

The invention discloses a work starting method for a hydrogenation process, which comprises the following steps of: taking the required oxidation state hydrogenation catalyst, and performing presulfurizing treatment on 20 to 80 weight percent of oxidation state hydrogenation catalyst, wherein a sulfurizing agent contained in partial oxidation state hydrogenation catalyst subjected to the presulfurizing treatment is 85 to 115 percent of theoretically required sulfur of all oxidation state hydrogenation catalyst; filling the presulfurized hydrogenation catalyst and the non-presulfurized hydrogenation catalyst in reactor, raising the temperature, introducing work starting oil and hydrogen into the reactor from the bottom of the reactor, keeping the constant temperature of between 200 and 280DEG C for 1 to 6 hours, and continuously raising the temperature to 300-340 DEG C to finish the work starting; and regulating to meet required conditions of hydrogenation reaction and performing normal hydrogenation operation. By the method, a part of the required catalyst can be subjected to the presulfurizing treatment only, the production period of presulfurizing the catalyst is reduced, the production cost is reduced, the economic performance is improved, and a proper work starting method can further improve the use performance of the catalyst.

Description

technical field [0001] The invention relates to a hydrogenation process start-up method, in particular to a hydrogenation process start-up method using both an oxidized hydrogenation refining catalyst and a sulfide-containing hydrogenation refining catalyst. technical background [0002] Due to the slow growth of crude oil production and increasingly heavy quality, the demand for clean oil products in today's world is increasing, and the product quality requirements are becoming more and more stringent. The hydrogenation process of petroleum distillate is the main technology for producing clean oil products at present, and the preparation technology of hydrogenation catalyst is the key of hydrogenation technology. The active metal component of the hydrogenation catalyst prepared by the common method is in an oxidized state. Before the oxidized state catalyst is used in industry, the active metal must be converted into a sulfurized state to have a high catalytic activity. Th...

AI Technical Summary

Problems solved by technology

Its main disadvantage is that the amount of catalyst that needs to be presulfurized outside the device is large, the pretreatment process outside the device takes a long time, and the processing cost increases. In the case of short delivery time of presulfurized catalyst or large production tasks , which may affect the on-time start-up of the hydrogenation unit