Preparing method for hydrotreating catalyst with desulfurization activity

A hydrogenation treatment and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve high desulfurization activity

Active Publication Date: 2019-07-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these improvements are not sufficient to meet refiners' increasingly stringent fuel requirements

Method used

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  • Preparing method for hydrotreating catalyst with desulfurization activity
  • Preparing method for hydrotreating catalyst with desulfurization activity
  • Preparing method for hydrotreating catalyst with desulfurization activity

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preparation example Construction

[0030] A preparation method of a hydrotreating catalyst with desulfurization activity, comprising the following steps:

[0031] Step 1, preparing a macroporous carrier of phosphorus-containing alumina or phosphorus-modified alumina material;

[0032] Step 2, impregnating the porous carrier with a type I metal solution, aging, drying, and roasting to obtain a catalyst precursor, and the type I metal solution is a NiMo solution containing Ni and Mo elements;

[0033] Step 3, the catalyst precursor is impregnated with the type II metal solution containing organic additives, then matured and dried, without going through the roasting process, to obtain the final catalyst; the type II metal solution is a CoMo solution containing Co and Mo elements, I The metalloid solution and the II metal solution are not NiMo solution or CoMo solution at the same time.

[0034] In the preparation method of the hydrotreating catalyst with desulfurization activity described in the present invention...

Embodiment 1

[0043] Embodiment 1: preparation I / II type Ni / CoMo catalyst C3 (according to the present invention)

[0044] Step 1: Use pseudo-boehmite to extrude, dry, and roast to make clover-shaped A1 2 o 3 carrier. Take 70g of prepared A1 2 o 3 The carrier was impregnated with 5.0 g of 85% phosphoric acid, and after curing for 4 hours, it was dried at 120° C. for 3 hours to obtain a phosphoric acid-modified alumina carrier.

[0045] Step 2, dissolving ammonium heptamolybdate (15 g) and nickel nitrate hexahydrate (11.6 g) in 50 ml of ammonia water (6%) solution to prepare NiMo solution. NiMo solution was added to the above-mentioned phosphorus-modified carrier, after impregnation, the extrudate was aged at room temperature for 6 hours, dried at 120°C overnight, and calcined at 400°C for 4 hours to obtain a catalyst precursor.

[0046] Step 3, dissolving ammonium heptamolybdate (15g) and cobalt nitrate hexahydrate (18.8g) in an aqueous solution of citric acid to prepare a uniform and ...

Embodiment 2

[0047] Embodiment 2 prepares I / II type Co / NiMo catalyst C2 (according to the present invention)

[0048] Step 1: Use pseudo-boehmite to extrude, dry, and roast to make clover-shaped A1 2 o 3 carrier. Take 70g of prepared A1 2 o 3 The carrier was impregnated with 5.0 g of 85% phosphoric acid, and after curing for 4 hours, it was dried at 120° C. for 3 hours to obtain a phosphoric acid-modified alumina carrier.

[0049] Step 2, dissolving ammonium heptamolybdate (15 g) and cobalt nitrate hexahydrate (18.8 g) in 50 ml of ammonia water (6%) solution to prepare a CoMo solution. The CoMo solution was added to the above-mentioned phosphorus-modified carrier, and after impregnation, the extrudate was aged at room temperature for 6 hours, dried at 100°C overnight, and calcined at 550°C for 4 hours to obtain a catalyst precursor.

[0050] Step 3, dissolving ammonium heptamolybdate (15g) and nickel nitrate hexahydrate (11.6g) in an aqueous solution of citric acid to prepare a uniform ...

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Abstract

The invention discloses a preparing method for a hydrotreating catalyst with the desulfurization activity. The preparing method includes the following steps that 1, a macroporous carrier of a phosphorus-containing aluminum oxide or phosphorus-modified aluminum oxide material is prepared; 2, a porous carrier is soaked with a I-class metallic solution, curing, drying and roasting are conducted, anda catalyst precursor is obtained, and the I-class metallic solution is a NiMo solution containing a Ni element and a Mo element; 3, the catalyst precursor is soaked with a II-class metallic solution containing an organic assistant, then curing and drying are conducted, a roasting process is not required, and a final catalyst is obtained; the II-class metallic solution is a CoMo solution containinga Co element and a Mo element, and the I-class metallic solution and the II-class metallic solution are not simultaneously the NiMo solution or the CoMo solution. The method adopts a metallic-solution step-by-step soaking, and active site combinations with different metal-class combinations and different types are provided, so that the hydrotreating catalyst generates the higher hydrogen desulfurization activity than a traditional pure I-type catalyst and a pure II-type catalyst.

Description

technical field [0001] The invention relates to a method for preparing a high-activity hydrogenation treatment catalyst, in particular to a NiCoMo high-activity hydrogenation desulfurization catalyst and its preparation method and application. Background technique [0002] The presence of impurities such as sulfur, nitrogen and metals in distillate oil will not only affect the oxidation stability of refined oil, but also emit SO 2 , NO 2 and other harmful gases. It is a very necessary measure to remove impurities in distillate oil through hydrotreating process. The goal of distillate hydrotreating is to convert organic sulfur in raw materials into hydrogen sulfide and organic nitrogen into ammonia. Distillate oil hydrotreating is a process in which distillate oil and hydrogen are contacted with a catalyst under certain temperature and pressure conditions to remove impurities and saturate aromatic hydrocarbons. Therefore, it is important to develop preparation methods of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J27/187C10G45/08
CPCB01J23/8892B01J27/187C10G45/08
Inventor 王延飞张志华翟绪丽谢彬张占全王燕王晶晶庄梦琪
Owner PETROCHINA CO LTD
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