# US 8,785,345 B2 · Method for preparing hydrorefining catalyst

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- Number: US 8,785,345 B2
- Document ID: US8785345B2
- Status: Granted
- Kind: B2
- Application number: 13/594,659
- Filed: 2012-08-24
- Published: 2013-08-29
- Granted: 2014-07-22
- Earliest claimed: 2010-03-31
- Assignees: PetroChina Company Limited
- Applicants: Shunqin Liang; Wei Xie; Zongbao Wang; Huifeng Xue; Guangbi Gong; Tinghai Wang; Jie Wu; Limin Sun; Hongmin Kang; Dehua Huang; Shufeng Wang; Yundi Zheng; Cailan Jiang; Longgang Lv
- Inventors: Shunqin Liang; Wei Xie; Zongbao Wang; Huifeng Xue; Guangbi Gong; Tinghai Wang; Jie Wu; Limin Sun; Hongmin Kang; Dehua Huang; Shufeng Wang; Yundi Zheng; Cailan Jiang; Longgang Lv
- Web page: https://patentgrep.com/patent/US8785345B2

## CPC

- B01J 23/8885: {containing also molybdenum}
- B01J 23/882: and cobalt
- B01J 23/8872: {Alkali or alkaline earth metals}
- B01J 35/615: {100-500 m2/g}
- B01J 35/633: {less than 0.5 ml/g}
- B01J 35/635: {0.5-1.0 ml/g}
- B01J 37/0201: {Impregnation}
- B01J 37/0203: {the impregnation liquid containing organic compounds}
- B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/20: Sulfiding
- C10G 45/08: in combination with chromium, molybdenum, or tungsten metals, or compounds thereof
- B01J 35/30: characterised by their physical properties
- B01J 2235/00: Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J 2235/30: Scanning electron microscopy; Transmission electron microscopy
- C10G 2300/1037: Hydrocarbon fractions
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES

## Abstract

A method for preparing hydrorefining catalyst comprises the following steps: (1) mixing an aqueous ammonia solution with a polyamine complexing agent to form a mixed solvent; (2) adding a cobalt salt to the mixed solvent, dissolving the cobalt salt, and then adding a molybdenum salt and optional salts of other active components, and dissolving them to prepare an impregnating solution; and (3) impregnating a support with the impregnating solution, followed by aging, drying, and activating the impregnated support to form a hydrorefining catalyst. The hydrorefining catalyst prepared by this method has good activity, selectivity and stability in use.

## Claims

### Claim 1

A method for preparing hydrorefining catalyst, comprising supporting active components on a support, the active components comprising cobalt and molybdenum, wherein the method comprises the steps of:
mixing an aqueous ammonia with a polyamine complexing agent to form a mixed solvent;
adding a salt comprising the active component cobalt to the mixed solvent, dissolving the cobalt salt, and then adding and dissolving a molybdenum salt or a molybdenum salt and salts of other active components and promoters to prepare an impregnation solution; and
impregnating a support with the impregnating solution, followed by aging, drying and activating the impregnated support to obtain the hydrorefining catalyst.

### Claim 2 (depends on 1)

The method for preparing hydrorefining catalyst according to claim 1, wherein a nickel salt, a tungsten salt and/or a soluble alkali or carbonate compound of a Group IA element is added during formulation of the impregnation solution.

### Claim 3 (depends on 1)

The method for preparing hydrorefining catalyst according to claim 1, wherein the impregnation solution has a pH value of above 10.

### Claim 4 (depends on 1)

The method for preparing hydro refining catalyst according to claim 1, wherein the polyamine complexing agent is one or more of EDTA, triethylene tetraamine, triethanolamine and ethylenediamine.

### Claim 5 (depends on 1)

The method for preparing hydrorefining catalyst according to claim 1, wherein the polyamine complexing agent is added at an amount of 5% to 10% by volume of the impregnation solution.

### Claim 6 (depends on 1)

The method for preparing hydrorefining catalyst according to claim 1, wherein the cobalt salt is selected from the group consisting of cobalt sulfate, cobalt halide, cobalt nitrate and cobalt acetate.

### Claim 7 (depends on 6)

The method for preparing hydrorefining catalyst according to claim 6, wherein the cobalt salt is cobalt nitrate or cobalt acetate.

### Claim 8 (depends on 1)

The method for preparing hydrorefining catalyst according to claim 1, wherein the support is alumina, silica, alumina-silica.