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Hydrogenation protection catalyst as well as preparation method and application thereof

A hydrogenation protection and catalyst technology, which is applied in the petrochemical field, can solve the problems such as the decrease of the mechanical strength of the carrier, the large addition amount, and the large particles, and achieve the effects of protecting the stability of the activity, improving the wear resistance, and improving the pore-enlarging effect.

Pending Publication Date: 2022-05-10
NINGBO ZHONGJIN PETROCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, on the one hand, it can avoid the problem that the mechanical strength of the carrier is reduced due to the large amount of conventional physical pore-enlarging agents that are formed when they burn out; on the other hand, it can better protect the activity stability of the downstream main catalyst

Method used

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  • Hydrogenation protection catalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0039] A method for preparing a hydrogenation protection catalyst, comprising the following steps:

[0040] (1) Mix and knead pseudo-boehmite, anthracene, biotite and extrusion aid evenly to obtain a mixture. in:

[0041] The added amount of the anthracene is 3.1-5.0% of the weight of the alumina carrier; the added amount of the biotite is 1.0-3.0% of the weight of the alumina carrier. The extrusion aid is one or more of starch, scallop powder, polyvinyl alcohol, methyl cellulose and polyethylene glycol, and its addition amount is 2 to 10 wt% based on the total weight of each component .

[0042] (2) Add the peptizing acid solution at 40-80°C to the mixture at a speed of 11-20g / min and knead evenly, after shaping, drying at 100-140°C, and roasting at 350-550°C for 5-10h, the alumina carrier is obtained . in:

[0043] The peptizing acid is one or more of nitric acid, phosphoric acid, citric acid, hydrochloric acid and acetic acid. The shaping is extruded into a cylindrica...

specific Embodiment

[0047] Preparation of hydrogenation protection catalyst C1: Take 50g of pseudo-boehmite, add 1.3g of anthracene, 0.7g of biotite, 3g of squash powder (extrusion aid), and knead evenly; add nitric acid (concentration of 60 %) aqueous solution, the addition rate is 20g / min, kneading, the addition amount is to meet the uniformity of kneading of the aforementioned four substances, extrude into a cylindrical strip with equal height-to-diameter ratio of 10mm, dry at 140°C for 7h, and roast at 400°C for 7.5h , to make an alumina carrier; then use cobalt nitrate to prepare an aqueous solution with a metal ion concentration of 10g / ml, add lauryl alcohol polyether to this solution to obtain an impregnating solution, which is used to impregnate the above alumina carrier for 7.5 hours, and then dry at 125°C 3h, 500 ℃ roasting 5h. The final composition of the catalyst is: 6.4wt% of cobalt oxide and the balance of aluminum oxide. Catalyst specific surface area 56m 2 / g, pore volume 0.56mL...

Embodiment 1

[0057] Example 1: Hydrogenation protection catalyst C1 and selective hydrofinishing catalyst 1010C are used, and the loading volume ratio is 1:3.

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Abstract

The invention relates to the field of petrifaction, and discloses a hydrogenation protection catalyst as well as a preparation method and application thereof. The hydrogenation protection catalyst comprises an alumina carrier and a metal oxide active component, and the preparation method comprises the following steps: uniformly mixing and kneading pseudo-boehmite, anthracene, biotite and an extrusion aid to obtain a mixture; uniformly mixing and kneading a peptizing acid solution and the mixture, shaping, drying and roasting to obtain an aluminum oxide carrier; adding a nonionic surfactant into the precursor aqueous solution of the metal oxide active component to form a mixed solution; and impregnating the alumina carrier in the mixed solution, drying, and roasting to obtain the hydrogenation protection catalyst. Anthracene is used as a pore-enlarging agent, and a better pore-enlarging effect is achieved. The mechanical strength of the carrier can be improved; on the other hand, the activity stability of the downstream main catalyst can be better protected. According to the hydrogenation protection catalyst, inferior heavy oil can be completely utilized, and the obtained mixed aromatic hydrocarbon product is high in yield and low in impurity content.

Description

technical field [0001] The invention relates to the petrochemical field, in particular to a hydrogenation protection catalyst and its preparation method and application. Background technique [0002] At present, oil resources are showing a trend of heavy and inferior quality. The output of heavy and inferior crude oil is increasing year by year worldwide, and the processing ratio of heavy and inferior crude oil is increasing day by day. There is an urgent need to increase the processing capacity of heavy and inferior crude oil, especially the processing capacity of residual oil. [0003] The residual oil is the residual oil obtained from the vacuum distillation of the primary processing unit of the refinery in the petrochemical industry, so it is called the vacuum residual oil; sometimes the heavy oil obtained from the bottom of the atmospheric distillation tower is also called the atmospheric residual oil. The content of vacuum residue in crude oil produced in my country is...

Claims

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Application Information

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IPC IPC(8): B01J23/755C10G45/06C07C7/163C07C15/24
CPCB01J23/755C10G45/06C07C7/163C07C15/24Y02P20/52
Inventor 李水荣徐保岳楼巧琳胡阳阳曹澎锐
Owner NINGBO ZHONGJIN PETROCHEM CO LTD
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