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A hydrogenation saturated catalyst, its preparation method and application

A technology of catalyst and catalyst carrier, which is applied in the field of saturated hydrogenation catalyst of diesel aromatics and hydrogenation saturated catalyst, can solve the problems of small increase range, limited increase degree of cetane number of diesel oil, limited hydrogenation activity, etc. Stability, reduction of risk of precious metal grain aggregation, effect of improved regeneration performance

Active Publication Date: 2020-03-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of limited hydrogenation activity and limited improvement of cetane number of diesel oil in diesel hydrogenation catalysts in the prior art, the present invention intends to provide a hydrogenation saturated catalyst, and overcome the problem of diesel oil hydrogenation upgrading technology sixteenth. For the defect that the alkane number is small, the catalyst of the present invention is used to hydrogenate and saturate the condensed ring aromatics in diesel oil to provide high-quality raw materials for type selection cracking, and then combine with type selection cracking to increase the cetane number and produce low aromatic diesel oil

Method used

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  • A hydrogenation saturated catalyst, its preparation method and application
  • A hydrogenation saturated catalyst, its preparation method and application
  • A hydrogenation saturated catalyst, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of hydrogenation saturated catalyst C1:

[0040] The first step, NaY zeolite modification: place 100 grams of industrially produced NaY zeolite containing 150g (NH 4 ) 2 SO 4 Stir in the aqueous solution, raise the temperature to 90~100°C and keep it for 1 hour, filter, repeat the above operation three times, and wash. Put the above-treated product in a tube furnace, raise the temperature to 500°C while feeding nitrogen, stop nitrogen, keep the pressure at 0.1MPa, and cool down naturally after 2 hours. The product obtained after the hydrothermal treatment was placed in 1 liter containing 154g CH 3 COONH 4 and 100g CH 3 COOH aqueous solution, and then filtered, washed, and dried to obtain the modified NaY zeolite, whose physical and chemical properties are shown in Table 1.

[0041] The second step, alumina modification: take SB powder alumina (Al 2 o 3 Aluminum powder, dry basis content 75%) 120g is melted with 100mL nitric acid gel with a concentrat...

Embodiment 2

[0046] Preparation of hydrogenation saturated catalyst C2:

[0047] The difference from Example 1 is that the hydrothermal treatment time in the second step was 84 hours, and modified alumina G2 was obtained, and the thermal stability test results are shown in Table 2. The other steps were the same as in Example 1 to prepare a bimetallic highly active hydrogenation saturation catalyst C2, the properties of which are listed in Table 3.

Embodiment 3

[0049] Preparation of hydrogenation saturated catalyst C3:

[0050] The difference from Example 1 is that the hydrothermal treatment time in the second step was 96 hours, and modified alumina G3 was obtained, and the thermal stability test results are shown in Table 2. The other steps were the same as in Example 1 to prepare a bimetallic highly active hydrogenation saturation catalyst C3, the properties of which are listed in Table 3.

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Abstract

The invention discloses a hydrogenation saturation catalyst, and a preparation method and application thereof. A catalyst carrier is prepared by compounding modified NaY zeolite and modified alumina,d a non-precious metal hydrogenation component and a precious metal hydrogenation component are sequentially loaded, negative-pressure medium-temperature drying, low-oxygen nitrogen drying and high-temperature oxygen-enriched nitrogen drying are performed, and then low-hydrogen partial-pressure reduction treatment is performed, so that the hydrogenation saturation catalyst is obtained, wherein, inthe low-hydrogen partial-pressure reduction treatment, a mixed gas of hydrogen and inert gas is adopted, the volume percentage of hydrogen in the mixed gas is from 1% to 99%, and the reduction temperature is from 400 to 550 DEG C. according to the invention, reduction is performed on a precious-metal-containing metal catalyst at a relatively high temperature by using a low-hydrogen concentrationand a low-hydrogen partial pressure, the speed of generating water through metal oxide reduction is reduced, and risks of aggregation of precious metal crystal grains caused by excessively high watercontent in a reduction medium is reduced. Low-aromatic diesel oil can be produced by using the catalyst to perform hydrogenation saturation on diesel oil containing aromatics and in combination with selective cracking, and the increase amplitude of the cetane number of the produced diesel oil is 23.8 units higher than that of the prior art.

Description

technical field [0001] The invention relates to a hydrogenation saturated catalyst, in particular to a saturated hydrogenation catalyst for diesel aromatics, and 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, the environmental protection agency has 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 number diesel oil. [0003] CN1156752A discloses a diesel oil upgrading process, which uses low-quality diesel oil as raw material, especially LCO raw material, while maintaining a certain N+αNH 3 Value and hydroconversion conditions, (combined with FH-98 and 3963 catalysts) make the feed oil pass through the hydroconvers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/14C10G45/54
CPCB01J29/146C10G45/54C10G2300/1037C10G2300/307C10G2400/04
Inventor 贝耀明柳伟秦波杜艳泽
Owner CHINA PETROLEUM & CHEM CORP