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A reduced bimetallic diesel hydroconversion catalyst

A hydrogenation conversion and bimetallic technology, which is applied in the field of hydrogenation conversion catalysts of polycyclic aromatic hydrocarbons in diesel oil and reduced bimetallic diesel hydrogenation conversion catalysts, can solve the problems of inability to remove aromatics, limited range, etc., and save equipment investment , saving operating costs, and simplifying the process

Active Publication Date: 2021-11-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is used in many sets of industrial devices in China. The problem is that its ring-opening and chain-breaking is the hydrocracking of an aromatic ring in the fused-ring aromatic hydrocarbons, and the aromatics cannot be removed; it can only increase the cetane number in Conducted within aromatics, limited range

Method used

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  • A reduced bimetallic diesel hydroconversion catalyst
  • A reduced bimetallic diesel hydroconversion catalyst
  • A reduced bimetallic diesel hydroconversion catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Take 40ml of Catalyst C (31.3g) and put it into the reactor of 100ml single-tube hydrogen once-through device, raise the temperature and vacuumize the device, and dry it for 4 hours at a temperature of 250°C and a vacuum degree > 66kPa; Nitrogen with % oxygen breaks the vacuum and heats up to 400°C at a rate of 20°C / h under the conditions of pressure 0.1MPa and tail gas volume 48NL / h. h, under the condition of constant temperature for 4 hours, replace the nitrogen with a mixed gas of 70v% hydrogen and 30v% argon, adjust the pressure to 0.1MPa, the exhaust gas volume to 28NL / h, raise the temperature to 510°C, and perform reduction for 48 hours; at 30°C / hour Cool down to 420°C at a rate of 15°C / h; adjust the pressure to 0.5MPa, circulate gas volume to 48NL / h, inject 320mL of cyclohexane containing 0.3g of quinoline in 4 hours; raise the temperature to 520°C at a rate of 15°C / h for 0.5h, The reduced bimetallic diesel hydroconversion catalyst RC1 was obtained, and its prope...

Embodiment 2

[0053] Except that the consumption of quinoline is changed into 0.6 gram, other operation is the same as embodiment 1. Catalyst RC2 is obtained.

Embodiment 3

[0055] Except that the consumption of quinoline is changed into 0.9 gram, other operation is the same as embodiment 1. Catalyst RC3 is obtained.

[0056] The catalyst of above embodiment is used for diesel oil hydroconversion experiment:

[0057] Presulfurize the catalysts of Examples 1 to 3; keep the temperature at 420°C, adjust the pressure to 0.5MPa, the circulation gas volume to 48NL / h, the amount of sulfurized oil to enter 80mL / h, and inject 320mL of 0.032g of sulfur into the ring in 4 hours. Hexane; cool down to 320°C at a speed of 15°C / h, adjust the pressure to 8.0MPa, the circulation gas volume to 48NL / h, and feed the raw material oil at the rate of 45g / h. 360°C fraction. After running for 300 hours, samples were taken for correlation analysis. The properties of the raw oil used in the test are shown in Table 3, and the test results are shown in Table 4.

[0058] Table 3. Raw oil properties

[0059]

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Abstract

A reduced bimetallic diesel hydroconversion catalyst, which uses the first modified zeolite, the second modified zeolite and alumina as a carrier to simultaneously support non-precious metal and noble metal hydrogenation components, after reduction with low hydrogen partial pressure, It is obtained after passing through at least one gaseous nitrogen compound selected from pyridine, quinoline, isoquinoline, azaanthene and azaphenanthrene. The acidic cracking component of the catalyst, the molecular sieve, is embedded in the highly active reducing state bimetallic diesel hydroconversion catalyst, so that the polycyclic aromatic hydrocarbons in the diesel oil are hydrogenated and saturated while opening the ring, which simplifies the process flow and can save equipment investment, Save on operating costs. And the gaseous nitrogen compound is used to passivate the acid center of the catalyst, so as to weaken the acid site of the molecular sieve, reduce the cracking reaction of the alkyl group, and improve the quality and yield of the target product.

Description

technical field [0001] The invention relates to a reduced-state bimetallic diesel hydrogenation conversion catalyst and a preparation method thereof, in particular to a catalyst for the hydrogenation conversion of diesel oil polycyclic aromatic hydrocarbons, which belongs to the technical field of hydrogenation catalysts. Background technique [0002] The main components of catalytic diesel are condensed ring aromatics, and the cetane number is very low. With the enhancement of people's awareness of environmental protection, environmental protection agencies have also put forward more stringent requirements for diesel oil indicators, limiting the aromatic content and minimum cetane number of diesel oil. Therefore, the market needs low aromatic high cetane diesel production technology. [0003] Chinese patent CN96109877.5 discloses a diesel hydrogenation conversion catalyst, which uses non-precious metals to provide hydrogenation active centers, molecular sieves to provide a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/14B01J29/16C10G45/54
CPCB01J29/146B01J29/166B01J2229/18C10G45/54
Inventor 贝耀明柳伟秦波杜艳泽
Owner CHINA PETROLEUM & CHEM CORP
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