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Diacetylene hydrogenation catalyst

A hydrogenation catalyst and catalyst technology, which is applied in the direction of hydrogenation hydrocarbon production, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of poor catalyst stability and high cost of alkyne hydrogenation

Active Publication Date: 2016-02-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the technical problem of high alkyne hydrogenation cost and poor catalyst stability in the prior art, and a new diacetylene hydrogenation catalyst is provided. Using this catalyst, the reaction has a higher hydrogenation rate. Hydrogen conversion rate, while the catalyst has good stability

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0017] Take by weighing 90 grams of pseudo-boehmite, 90 grams of θ-alumina, and 10 grams of turnip powder and mix evenly, then add 25 grams of polyvinyl alcohol solution (mass concentration is 5%), and 6.0 grams of nitric acid with a concentration of 68% , 1 g of magnesium nitrate, 310 ml of aqueous solution, squeezed into mm clover-shaped carrier, the wet strip was dried at 110° C. for 10 hours and then calcined at 980° C. for 4 hours to obtain the carrier. The carrier is impregnated in an equal amount of impregnation solution with a nickel content of 10wt.%, a zinc content of 0.1wt.%, and a lanthanum content of 0.1wt.%, dried at 60°C for 8 hours, and calcined at 450°C for 4 hours to obtain oxidized Ni The composition of the base catalyst is shown in Table 2. Then the catalyst was reduced for 12 hours under the conditions that the hydrogen pressure was 0.1 MPa, the temperature was 450° C. and the hydrogen flow rate was 1500 ml / min. When the temperature drops below 35° C., ...

Embodiment 2

[0019] Take by weighing 90 grams of pseudo-boehmite, 90 grams of θ-alumina, and 10 grams of turnip powder and mix evenly, then add 25 grams of polyvinyl alcohol solution (mass concentration is 5%), and 6.0 grams of nitric acid with a concentration of 68% , 2 grams of magnesium nitrate, 310 ml of aqueous solution, squeezed into mm clover-shaped carrier, the wet strip was dried at 110° C. for 10 hours and then calcined at 980° C. for 4 hours to obtain the carrier. The carrier is impregnated in equal amounts in an impregnating solution with a nickel content of 10wt.%, a zinc content of 0.5wt.%, and a cerium content of 0.5wt.%, dried at 60°C for 8 hours, and calcined at 450°C for 4 hours to obtain oxidized Ni The composition of the base catalyst is shown in Table 2. Then the catalyst was reduced for 12 hours under the conditions that the hydrogen pressure was 0.1 MPa, the temperature was 450° C. and the hydrogen flow rate was 1500 ml / min. When the temperature drops below 35° C....

Embodiment 3

[0021] Take by weighing 90 grams of pseudo-boehmite, 90 grams of θ-alumina, and 10 grams of asparagus powder and mix evenly, then add 25 grams of polyvinyl alcohol solution (mass concentration is 5%), and 5.0 grams of nitric acid with a concentration of 68% , 2 grams of calcium nitrate, 310 ml of aqueous solution, squeezed into mm clover-shaped carrier, the wet strip was dried at 110° C. for 10 hours and then calcined at 980° C. for 4 hours to obtain the carrier. The carrier is impregnated in equal amounts in an impregnating solution with a metallic nickel content of 12wt.%, a zinc content of 1.67wt.%, and a cerium content of 0.77wt.%, dried at 60°C for 8 hours, and calcined at 450°C for 4 hours to obtain an oxidized Ni-based substrate. The catalyst composition is shown in Table 2. Then the catalyst was reduced for 12 hours under the conditions that the hydrogen pressure was 0.1 MPa, the temperature was 450° C. and the hydrogen flow rate was 1500 ml / min. When the temperature...

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Abstract

The invention relates to a diacetylene hydrogenation catalyst and mainly solves the technical problems of high catalyst cost and poor stability in the prior art. In the invention, by means of a fixed bed reactor, a material containing the diacetylene and hydrogen are employed as raw materials and are contacted with a catalyst bed layer through the reactor to convert the diacetylene into monoalkene or alkane. The catalyst used in the reactor comprises the following components, on the basis of the weight part of the catalyst: (a) 10-20 parts of metal nickel or an oxide thereof, (b) 0.1-10 parts of at least one element of cerium or lanthanum or an oxide thereof; (c) 0.1-30 parts of zinc or an oxide thereof, (d) 0-2 parts of alkali metal or alkali earth metal, and (e) 38-90 parts of aluminum oxide. The technical scheme solves the technical problem well. The diacetylene hydrogenation catalyst is used in industrial production of high-order acetylene hydrogenation in a device of partially oxidizing natural gas to produce acetylene.

Description

technical field [0001] The invention relates to a high-level alkyne hydrogenation catalyst, especially a diacetylene hydrogenation catalyst. Background of the invention [0002] The partial oxidation of natural gas to acetylene produces some high-grade acetylene by-products. It mainly contains diacetylene (37.17V%), methyl acetylene, propyne (6.74V%), vinyl acetylene (10.51V%) and acetylene (19.85V%) and other unsaturated hydrocarbons and some C6H6 + (25.72V%) heavy components. The properties of these unsaturated hydrocarbons are extremely unstable. For example, the decomposition pressure of diacetylene is only 0.02MPa, vinyl acetylene is easy to polymerize to form explosive polymers, etc., which brings great safety hazards to the production of enterprises. It is diluted and then sent to the torch for burning. The dilution gas contains more than 50% CO, H 2 Such components have high economic value. Higher alkynes contain many widely used chemical raw materials, but due ...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J27/185C07C5/09C07C5/08C07C11/08C07C9/10
Inventor 赵多刘仲能马宇春任杰顾国耀
Owner CHINA PETROLEUM & CHEM CORP
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