|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||502/220 ; 502/221 ; 502/313 ; 502/314|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 50 인용 특허 : 0|
This invention concerns a method of preparing catalysts and certain catalysts which can be obtained by the method. The method comprises (a) coprecipitating at least a group VIII metal sulfide with at least a group VIB metal sulfide, at a pH maintained at a value of 4.5 to 8; (b) separating the resultant precipitate; (c) drying the precipitate; and (d) calcining the dried precipitate; all the steps being effected under an inert atmosphere. The catalysts have a stoichiometry of 1.2 to 2.2 atoms of sulfur per metal atom, a crystallographic structure of moly...
A process for preparing a hydrotreatment catalyst comprising an intimate mixture of at least one group VI B metal sulfide and at least one group VIII metal sulfide characterized in that it comprises the following steps: (a) reacting, at a pH maintained at a value of 4.5 to 8, an aqueous solution of at least one soluble salt of at least one group VIII metal and at least one ammonium salt of a polyanion of at least one group VI B metal, with at least one water-soluble sulfiding agent, under conditions which form a coprecipitate of sulfides; (b) separating ...