Modified alumina carrier and preparation method thereof

An alumina carrier and alumina technology, which is applied in the field of oil hydrogenation, can solve the problems of no significant increase in the amount of B acid, catalyst carbon deposition poisoning and deactivation, and reduced catalyst stability.

Active Publication Date: 2021-04-09
CHINA PETROLEUM & CHEM CORP +1
View PDF15 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when increasing the amount of carrier B acid, the total acid amount of the carrier is too large, or the ratio of the amount of B acid is increased but the amount of B acid is not significantly improved. In addition, while increasing the pore size of the carrier, the carrier Excessive loss of specific surface area

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified alumina carrier and preparation method thereof
  • Modified alumina carrier and preparation method thereof
  • Modified alumina carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]Add 9.5g of phosphoric acid into the reaction tank and place 1 L of deionized water as the bottom liquid, put 1 L of aluminum sulfate solution (concentration of 1mol / L) and 1 L of sodium hydroxide solution (concentration of 3.0mol / L) in In the raw material tank, the temperature of the reaction tank is controlled at 65°C. The aluminum sulfate solution was injected into the reaction tank at a rate of 12 mL / min, while the sodium hydroxide solution was injected and the rate was adjusted to keep the pH value of the reaction tank solution at 8.0, and the neutralization was completed after 120 min. Keep 65°C and pH constant at 8.0 in the reaction tank, aging treatment for 3h, washing with deionized water for 3 times, filtering, placing the filter cake in a 500ml solution containing 27.7g magnesium nitrate and 100g urea, fully stirring, and then Hydrothermal treatment at 150°C for 10 hours, filtration and drying at 120°C for 3 hours to obtain modified pseudo-boehmite.

[0024] ...

Embodiment 2

[0026] Add 20g of phosphoric acid into the reaction tank and place 1 L of deionized water as the bottom liquid, and place 1 L of aluminum sulfate solution (concentration of 1mol / L) and 1 L of sodium hydroxide solution (concentration of 3.0mol / L) in the raw material In the tank, the temperature of the reaction tank is controlled at 65°C. The aluminum sulfate solution was injected into the reaction tank at a rate of 12 mL / min, while the sodium hydroxide solution was injected and the rate was adjusted to keep the pH value of the reaction tank solution at 8.0, and the neutralization was completed after 120 min. Keep 65°C and pH constant at 8.0 in the reaction tank, aging treatment for 3h, washing with deionized water for 3 times, filtering, placing the filter cake in a 500ml solution containing 27.7g magnesium nitrate and 100g urea, fully stirring, and then Hydrothermal treatment at 150°C for 10 hours, filtration and drying at 120°C for 3 hours to obtain modified pseudo-boehmite. ...

Embodiment 3

[0029] Add 28.6g of phosphoric acid into the reaction tank and place 1 L of deionized water as the bottom liquid, put 1 L of aluminum sulfate solution (concentration of 1mol / L) and 1 L of sodium hydroxide solution (concentration of 3.0mol / L) in In the raw material tank, the temperature of the reaction tank is controlled at 65°C. The aluminum sulfate solution was injected into the reaction tank at a rate of 12 mL / min, while the sodium hydroxide solution was injected and the rate was adjusted to keep the pH value of the reaction tank solution at 8.0, and the neutralization was completed after 120 min. Keep 65°C and pH constant at 8.0 in the reaction tank, aging treatment for 3h, washing with deionized water for 3 times, filtering, placing the filter cake in a 500ml solution containing 27.7g magnesium nitrate and 100g urea, fully stirring, and then Hydrothermal treatment at 150°C for 10 hours, filtration and drying at 120°C for 3 hours to obtain modified pseudo-boehmite.

[0030...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a modified alumina carrier and a preparation method thereof. Based on the weight of the modified alumina carrier, the modifier A accounts for 2wt%-10wt% by element, the modifier B accounts for 3wt%-15wt% by oxide, and a group VIII metal sulfide accounts for 2wt%-10wt%; and the infrared acid amount at a temperature of 250-450DEG C is 0.18-0.55mmol/g. The preparation method comprises the following steps: (1) adding an aluminum source and a precipitant into a precursor aqueous solution containing a modifier A in parallel, carrying out precipitation reaction, carrying out hydrothermal treatment, and then performing filtering and drying to obtain modified pseudo-boehmite; (2) uniformly mixing the modified pseudo-boehmite with a peptizing agent and an extrusion aid, carrying out extrusion molding, and performing drying and roasting to obtain an alumina carrier; and (3) loading a VIII group metal onto the alumina carrier, and carrying out vulcanization treatment to obtain the modified alumina carrier. The modified alumina carrier has the characteristics of appropriate medium-strength acid amount, high B acid content, low L acid content, large pore size, centralized pore size and pore distribution and the like, and is suitable for the hydrogenation reaction process of aviation kerosene, diesel oil and coker naphtha.

Description

technical field [0001] The invention relates to the technical field of hydrogenation of oil products, in particular to a modified alumina carrier and a preparation method thereof. Background technique [0002] Due to the existence of the acid center of the hydrogenation catalyst, the compound that is easy to deposit carbon is strongly adsorbed on the acid center of the catalyst, covering the active center, and gradually blocking the pores, so that the reactants cannot approach the active center, which greatly reduces the surface utilization of the catalyst, resulting in Catalyst carbon deposit deactivation. The deactivation rate of the diesel hydrodesulfurization catalyst is related to the deactivation of the catalyst's carbon deposition, and the carbon deposition reaction is closely related to the medium-strong acid strength of the catalyst. At the same time, the interaction between Lewis acid and basic nitrogen compounds is the main char formation pathway, and the Lewis a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J21/04B01J23/75B01J23/755B01J23/882B01J23/883B01J35/10B01J37/02B01J37/20C10G45/08
CPCB01J23/78B01J21/04B01J35/1019B01J35/1042B01J35/1061B01J37/20B01J37/0207B01J23/8872C10G45/08C10G2300/202C10G2300/1055C10G2300/1059C10G2300/70Y02P20/52
Inventor 刘丽李扬杨成敏姚运海段为宇孙进郭蓉周勇郑步梅丁莉
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap