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1. (WO2018038642) METHOD FOR REGENERATING A SPENT HYDROTREATING CATALYST

Pub. No.:    WO/2018/038642    International Application No.:    PCT/RU2017/000606
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Wed Aug 23 01:59:59 CEST 2017
IPC: B01J 38/52
B01J 38/02
Applicants: AKTSIONERNOE OBSCHESTVO "GAZPROMNEFT-OMSKY NPZ" (AO "GAZPROMNEFT-ONPZ")
АКЦИОНЕРНОЕ ОБЩЕСТВО "ГАЗПРОМНЕФТЬ-ОМСКИЙ НПЗ" (АО "ГАЗПРОМНЕФТЬ-ОНПЗ")
Inventors: KLIMOV, Oleg Vladimirovich
КЛИМОВ, Олег Владимирович
BUDUKVA, Sergey Viktorovich
БУДУКВА, Сергей Викторович
ZAGORUIKO, Andrey Nikolaevich
ЗАГОРУЙКО, Андрей Николаевич
NOSKOV, Alexandr Stepanovich
НОСКОВ, Александр Степанович
Title: METHOD FOR REGENERATING A SPENT HYDROTREATING CATALYST
Abstract:
The invention relates to a method for regenerating spent catalysts and to a method for hydrotreating a diesel fuel. The invention solves the problem of providing an effective method for regenerating catalysts. A method is described for regenerating a spent hydrotreating catalyst, according to which a spent catalyst is calcined in an airstream, or in a bed no higher than 30 mm, or in a rotary-drum furnace, while agitating the bed at a temperature of no more than 650°С, i.e. under conditions which allow a catalyst to be produced that has a pore volume of 0.3-0.8 ml/g, a specific surface area of 150-280 m2/g and an average pore diameter of 6-15 nm and that contains, in wt.%: 2.0-5.35 Со; 10.0-16.0 Мо; 0.2-0.8 S; no more than 0.2 С; which is then saturated with a solution of citric acid with a concentration in the range of 1.3-2.5 mol/litre in a mixture of water and butyl diglycol (10-20 wt. %), and heat-treated under conditions that allow production of a catalyst that contains, in wt.%: 5.1-18.0 Со(C6H6O7); 7.5-15.0 Н4[Мо4(C6H5O7)2O11]; 4.3-19.0 H3[Со(ОН)6Mo6O18]; 0.5-2.30 SO4 2-; with the remainder being a carrier. The technical result is that the invention allows the catalyst activity to be restored to 100% and higher.