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Selective hydrogenation and mono-olefin isomerism catalyst, and its preparing method and use

A technology for selective hydrogenation and catalysts, which is applied in the fields of isomerization to produce hydrocarbons, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Large hydrogen loss and other problems, to achieve the effect of high activity, stable activity and low starting temperature

Inactive Publication Date: 2005-10-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the study of U.S.P3485887, it is mentioned that Al containing 20-40% spinel lithium aluminate 2 o 3 Palladium catalyst as a carrier, but the hydrogenation rate of butadiene is low, and the hydrogenation loss of butene is large

Method used

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  • Selective hydrogenation and mono-olefin isomerism catalyst, and its preparing method and use
  • Selective hydrogenation and mono-olefin isomerism catalyst, and its preparing method and use
  • Selective hydrogenation and mono-olefin isomerism catalyst, and its preparing method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The catalyst is used for C 4 The alkylation feedstock is prehydrogenated. The hydrogenation process conditions are pressure 2.0MPa, space velocity 4.0h -1 , the ratio of hydrogen to butadiene is 8:1 (mol), and the temperature is 70°C. Catalyst loading 50ML, isothermal bed. The evaluation results are:

[0022]

[0023] The hydrogenation rate of butadiene is greater than 99.8%, the isomerization rate of n-butene reaches 60.6%, and the hydrogenation loss rate of butene is 0%.

Embodiment 2

[0025] The raw material aluminum hydroxide powder prepared by the nitric acid method or quick release method is mixed and kneaded with nitric acid, phosphoric acid and water. After extrusion, it is dried at 120°C, and then roasted at 1150°C for 5 hours. The rest of the preparation process is the same as in Example 1. P 2.5%, palladium 0.3% catalyst. Its physical properties are:

[0026] Specific surface (m 2 / g)

Pore ​​volume (ml / g)

Lateral pressure strength (N / cm)

92

0.56

≮30

[0027] Evaluation process is with embodiment 1, and evaluation result is:

[0028]

[0029] The hydrogenation rate of butadiene is greater than 99.8%, the isomerization rate of n-butene reaches 69.5%, and the hydrogenation loss rate of butene is 0%.

Embodiment 3

[0031] The raw material aluminum hydroxide powder prepared by the nitric acid method or the quick release method is mixed and kneaded with nitric acid, boric acid and water. After extrusion, it is dried at 120°C, and then roasted at 1150°C for 5 hours. The rest of the preparation process is the same as in Example 1. B 2.5%, palladium 0.3% catalyst. Its physical properties are:

[0032] Specific surface (m 2 / g)

Pore ​​volume (ml / g)

Lateral pressure strength (N / cm)

108

0.68

≮30

[0033] Evaluation process is with embodiment 1, and evaluation result is:

[0034]

[0035] The hydrogenation rate of butadiene is greater than 99.8%, the isomerization rate of n-butene reaches 64.4%, and the hydrogenation loss rate of butene is 0.72%.

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PUM

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Abstract

The present invention relates to a catalyst selective hydrogenation and mono-olefin isomerization. Its carrier is aluminium oxide, and its active composition contains palladium. It is characterized by that specific surface area of said catalyst is 80-120 sq.m / g, and its specific pure volume is 0.4-0.8 ml / g. The weight percentage contents of active components are Pd 0.2-0.3%, adjuvant X, 1-5% and ajuvant X2 0-5%, in which X, is one or several kinds selected from B, P and Si, and X2 is one or several kinds selected from first main group elements and second main group elements. Besides, said invention also provides the preparation method of said catalyst and its application.

Description

technical field [0001] The invention relates to a catalyst for selective hydrogenation and monoolefin isomerization, especially suitable for C4 selective hydrogenation for removing butadiene and converting 1-butene into 2-butene, a preparation method and application thereof. Background technique [0002] With the rapid expansion of refining capacity, FCC produces a considerable amount of by-product C4 through the steam cracking process of hydrocarbons. Butene alkylation is the main process for refineries to produce high-quality gasoline. In this process, the isoparaffin mixture is produced from isobutane and butene under the action of sulfuric acid and hydrofluoric acid, which is an ideal blending component of high-quality high-octane gasoline, with moderate saturated vapor pressure, no olefin, no sulfur , No benzene and aromatic compounds, clean. With the continuous improvement of people's awareness of environmental protection, it is urgent to reduce or stop the use of gas...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J23/58B01J27/14C07C5/05C07C5/22
Inventor 李斯琴梁顺琴刘根生马红江靳军
Owner PETROCHINA CO LTD
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