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Selective nickel series hydrogenating catalyst and its preparing process and uses

A hydrogenation catalyst and catalyst technology, applied in refining to remove heteroatoms, etc., can solve the problems of catalysts bearing hydrogenation load and poor hydrogenation stability, and achieve good stability

Active Publication Date: 2009-05-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1218822A has reported a kind of Ni / Al 2 o 3 A selective hydrogenation catalyst suitable for pyrolysis gasoline fractions. The catalyst is prepared by loading nickel on an alumina support containing lithium or alkaline earth metals. This catalyst is not good in hydrogenation load and hydrogenation stability.

Method used

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  • Selective nickel series hydrogenating catalyst and its preparing process and uses
  • Selective nickel series hydrogenating catalyst and its preparing process and uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 300g of alumina powder to 140ml of water, knead and extrude into a strip, dry at 120°C in air, and bake at 860°C for 4 hours to obtain Al 2 o 3 carrier.

[0027] Add 8.6g of nickel nitrate to 5ml of water and stir to dissolve, then add 1.4ml of triethanol, add 0.8g of cerium nitrate, 0.8g of lanthanum nitrate, 0.6g of ammonium molybdate, add 0.8g of citric acid, and adjust the pH value to 4. Impregnated on 10g carrier, aged for 12 hours, dried at 120°C, and calcined at 400°C for 4 hours to prepare catalyst A. Catalyst specific surface 160m 2 / g, pore volume 0.48ml / g.

Embodiment 2

[0031] Add 300g of alumina powder prepared by the nitric acid method to 140ml of water, knead and extrude into a strip, dry at 120°C in air, and roast at 900°C for 6 hours to obtain Al 2 o 3 carrier.

[0032] Add 7.7g of nickel nitrate to 5ml of water and stir to dissolve, then add 1.0ml of triethanol, add 1.1g of lanthanum nitrate, 0.8g of ammonium molybdate, add 0.5g of citric acid, adjust the pH value to 4, impregnate in 10g on the carrier, aged for 12 hours, dried at 120°C, and calcined at 450°C for 4 hours to obtain catalyst D. Catalyst specific surface area 148m 2 / g, pore volume 0.45ml / g.

Embodiment 3

[0036] Add 300g of alumina powder to 140ml of water, knead and extrude into a strip, dry at 120°C in the air, and roast at 980°C for 4 hours to obtain Al 2 o 3 carrier.

[0037] Add 8.6g of nickel nitrate to 5ml of water and stir to dissolve, add 0.8g of cerium nitrate, 0.8g of lanthanum nitrate, and 0.9g of chromium molybdate during stirring, adjust the pH value to 4, impregnate on 10g of carrier, and age for 12 hours at 120°C Drying and calcining at 400°C for 4 hours to obtain catalyst H. Catalyst specific surface area 136m 2 / g, the pore volume is 0.43ml / g.

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Abstract

The invention discloses a selectivity nickel-system hydrogenating catalyst based on alumina as carrier, which comprises the following parts: 100g catalyst, 12-20g nickel oxide, 2-8g lanthanum oxide and / or cerium oxide, 2-8g VIB element oxide, wherein the specific surface of catalyst is 60-200m2 / g with pore content at 0.4-0.7ml / g. the making method comprises the following steps: adding active component nickel and lanthanum and or cerium, VIB element compound in the water; dissolving completely; adjusting pH value to 3. 8-5; immersing alumina carrier in the leaching liquid; loading each component on the alumina carrier; drying under 100-120 deg. c; sintering under 200-480 deg. c for 3-5h.

Description

technical field [0001] The invention relates to a selective nickel-based hydrogenation catalyst and its preparation method and application. The catalyst is suitable for selective hydrogenation of middle and low distillate oils, and is especially suitable for one-stage selective hydrogenation process of pyrolysis gasoline fraction. Background technique [0002] Pyrolysis gasoline is a by-product of ethylene cracking, accounting for more than 50% of ethylene production capacity. It contains highly unsaturated hydrocarbons, such as diolefins, styrene, etc., which are converted into corresponding monoolefins through selective hydrogenation. With the continuous enhancement of my country's ethylene production capacity, pyrolysis gasoline hydrogenation has been developed in the direction of nickel-based catalysts for full-fraction hydrogenation. The variability of domestic pyrolysis gasoline raw materials, differences in cracking equipment and cracking methods have caused some manu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/06
Inventor 梁顺琴吕龙刚许东义唐迎春滕彩梅
Owner PETROCHINA CO LTD
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