| 摘要 |
A hydroconversion catalyst with a bimodal pore structure:
an oxide matrix predominantly of calcined aluminium;a hydro-dehydrogenative active phase of at least one group VIII metal being at least partly commixed within the said oxide matrix mainly made up of calcined aluminium, an SBET specific surface greater than 100 m2/g, a mesoporous median diameter in volume between 12 and 25 nm inclusive, a macroporous median diameter in volume between 250 and 1500 nm inclusive, a mesoporous volume as measured by mercury intrusion porosimeter greater than or equal to 0.55 ml/g and a total measured pore volume by mercury porosimetry greater than or equal to 0.70 ml/g;
a method for preparing a residue catalyst for hydroconversion/hydroprocessing by commixing the active phase with a particular alumina,
the use of the catalyst in hydroproces sing, including hydroproces sing heavy feeds. |
| 主权项 |
1. Procedure for preparing an active phase commixing catalyst, comprising at least one metal from the periodic table group VI B, possibly at least one metal from group VIII of the periodic table, possibly phosphorus and a predominantly aluminium calcined matrix oxide, comprising the following steps:
a) a step dissolving in water an acid aluminium precursor chosen from among aluminium sulphate, aluminium chloride and aluminium nitrate at a temperature between 20 and 90° C., a pH between 0.5 and 5, for a period between 2 and 60 minutes; b) a step for adjusting the pH by adding into the suspension obtained in step a) at least one base precursor chosen from among sodium aluminate, potassium aluminate, ammonia, sodium hydroxide, or potassium hydroxide, at a temperature between 20 and 90° C., with a pH between 7 and 10, between 5 and 30 minutes. (c) a step for co-precipitation of the suspension obtained after step b) by adding into the suspension at least one base precursor chosen between sodium aluminate, potassium aluminate, ammonia, sodium hydroxide or potassium hydroxide and at least one acid precursor selected from aluminium sulphate, aluminium chloride, aluminium nitrate, sulphuric acid, hydrochloric acid or nitric acid, at least one base or acid precursor comprising aluminium; the relative flow rate of the acidic and base precursors is chosen so as to obtain a pH of the reaction medium between 7 and 10 and the flow rate of the acidic and base precursors comprising aluminium is set so as to obtain a final alumina concentration in the suspension of between 10 and 38 g/l; d) a step for filtering the suspension obtained after step c) co-precipitation to obtain alumina gel; e) a step for drying the alumina gel obtained in step d) to obtain a powder; f) a step for heat treating the powder resulting from step e) at a temperature between 500 and 1000° C., for between 2 and 10 hrs in the presence or not of an air flow containing up to 60% water volume to obtain an aluminium calcined pore oxide; g) a step of mixing the aluminium calcined pore oxide obtained with a solution containing at least a metal precursor of the active phase to form a paste; h) a step for shaping the obtained paste; (i) a step for drying the shaped paste at a temperature less than or equal to 200° C. to obtain a dried catalyst; (j) a possible step for heat treating the catalyst dried at a temperature between 200 and 1000° C. with or without water. |
