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Alkyne selective hydrogenation catalyst and preparation method thereof

A technology of selective hydrogenation and catalyst, applied in the direction of selective hydrogenation refining, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., which can solve the problems of difficult regeneration, catalyst life and short regeneration cycle , Catalyst active components are easy to lose, etc.

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Noble metal catalysts have good low-temperature activity and mild reaction conditions, but their disadvantages are that the active components of the catalyst are easy to lose, expensive, difficult to regenerate, and slightly poor in hydrogenation selectivity
Due to the poor selectivity of the above catalysts, resulting in C 4 The loss of 1,3-butadiene in the fraction is relatively large, so it is not suitable for the selective hydrogenation of the C4 fraction with a large butadiene content to remove alkynes
In addition, the lifetime and regeneration cycle of these catalysts are short, which increases the operating cost

Method used

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  • Alkyne selective hydrogenation catalyst and preparation method thereof
  • Alkyne selective hydrogenation catalyst and preparation method thereof
  • Alkyne selective hydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1-preparation catalyst 1

[0061] Firstly, a titania-alumina composite oxide carrier was prepared according to the method in Example 1 of CN1184289C. Take the specific surface area as 160m 2 / g, 90g of clover-shaped alumina with a pore volume of 0.58ml / g and a most probable pore diameter of 130 angstroms, impregnated with 53ml of titanium sulfate in a 0.557g / ml dilute sulfuric acid solution, stirred for 15 minutes, and dried at 120°C for 8 hours Then, it was calcined at 900° C. for 4 hours to obtain a titanium oxide-alumina composite oxide (A-1). The obtained composite oxide had a titanium oxide content of 10% by weight and a specific surface area of ​​144m 2 / g, the pore volume is 0.56ml / g, and the most probable pore diameter is 125 angstroms.

[0062] Prepare 63ml of a mixed aqueous solution containing copper nitrate, cobalt nitrate, cerium nitrate and nickel nitrate as the immersion solution, in the immersion solution, the amount of copper nitrate is 3% ...

Embodiment 2

[0063] Embodiment 2-preparation catalyst 2

[0064] Prepare 63 ml of a mixed aqueous solution containing copper nitrate, cobalt nitrate, lanthanum nitrate and zinc nitrate as an immersion solution, in this immersion solution, the amount of copper nitrate is 7% by weight based on copper element, and the amount of cobalt nitrate is 3% by weight based on cobalt element , the amount of lanthanum nitrate is 0.1% by weight in terms of lanthanum element, and the amount of zinc nitrate is 0.2% by weight in terms of zinc element. At room temperature, take 100g of titanium oxide-alumina composite oxide (A-1), impregnate it with the previously prepared impregnation solution, dry it at 120°C for 4 hours, then calcinate it at 500°C for 4 hours, take it out and cool it to room temperature . The catalyst prepared in this way is designated Catalyst 2.

Embodiment 3

[0065] Embodiment 3-preparation catalyst 3

[0066] Prepare 63ml of a mixed aqueous solution containing copper nitrate, cobalt nitrate, neodymium nitrate and nickel nitrate as the immersion solution, in the immersion solution, the amount of copper nitrate is 5% by weight based on copper element, and the amount of cobalt nitrate is 3% by weight based on cobalt element , the amount of neodymium nitrate was 0.1% by weight as neodymium element, and the amount of nickel nitrate was 0.2% by weight as nickel element. At room temperature, take 100g of titanium oxide-alumina composite oxide (A-1), impregnate it with the previously prepared impregnation solution, dry it at 120°C for 4 hours, then calcinate it at 500°C for 4 hours, take it out and cool it to room temperature . The catalyst prepared in this way is designated Catalyst 3.

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Abstract

The invention provides an alkyne selective hydrogenation catalyst and a preparation method thereof. The alkyne selective hydrogenation catalyst comprises a titanium oxide-alumina composite oxide carrier and materials carried by the titanium oxide-alumina composite oxide carrier, wherein the materials comprise: by weight, 1 to 20% of copper, 0.05 to 3% of cobalt, 0.05 to 1% of one or more lanthanide metals, and optional zinc and / or nickel. In alkyne selective hydrogenation, the alkyne selective hydrogenation catalyst has high activity and high selectivity, can resist sulfur and arsenic poisoning, and has long action time. The alkyne selective hydrogenation catalyst is especially suitable for selective hydrogenation of alkynes of mixed C4 hydrocarbons.

Description

technical field [0001] The invention relates to an alkyne selective hydrogenation catalyst and a preparation method thereof. Specifically, the present invention relates to a supported copper-based alkyne selective hydrogenation catalyst comprising a titania-alumina composite oxide support, and the active metal component loaded on the support contains, in addition to copper, Cobalt, lanthanide metals, and optionally zinc and / or nickel are used as promoter metals. The catalyst can be used for hydroremoval of C 4 The alkynes in the distillate not only have high catalytic activity and high selectivity, but also have good stability and long service life. Background technique [0002] 1,3-butadiene as a raw material for synthetic rubber is mainly a by-product C from cracking to ethylene 4 Separated from the distillate. Synthetic rubber requires that the total content of alkynes in 1,3-butadiene raw materials should be less than 20ppm, of which vinyl acetylene is less than 5ppm...

Claims

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Application Information

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IPC IPC(8): B01J23/83C07C7/167C10G45/36
Inventor 杜周柴忠义纪玉国季静任玉梅
Owner CHINA PETROLEUM & CHEM CORP
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