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Methanol catalyst protection agent and preparation method thereof

A protective agent and catalyst technology, applied in the field of methanol catalyst protective agent and its preparation, can solve the problem that sulfides and carbonyls are difficult to be effectively removed at the same time

Active Publication Date: 2019-09-24
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a methanol catalyst protectant and its preparation method in order to overcome the existing problems in the prior art that the sulfide and carbonyl compounds in the synthesis gas are difficult to be effectively removed at the same time.

Method used

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preparation example Construction

[0016] The invention provides a kind of preparation method of methanol catalyst protecting agent, comprising the following steps:

[0017] (1) Prepare a mixed aqueous solution of precursors of copper oxide, zinc oxide, aluminum oxide and calcium oxide, iron oxide and / or manganese oxide, or first prepare a mixed aqueous solution of precursors of copper oxide, zinc oxide and aluminum oxide, and then prepare calcium oxide Mixing an aqueous solution with precursors of iron oxide and / or manganese oxide; configuring an aqueous solution of a precipitating agent;

[0018] (2) Co-precipitate the precursor mixed aqueous solution of copper oxide, zinc oxide, aluminum oxide and calcium oxide, iron oxide and / or manganese oxide with the precipitant aqueous solution, or mix the precursor mixed aqueous solution of copper oxide, zinc oxide and aluminum oxide The aqueous solution mixed with the precursors of calcium oxide, iron oxide and / or manganese oxide and the aqueous solution of the precip...

Embodiment 1

[0031] CuO-ZnO-Al 2 o 3 -CaO-Fe 2 o 3 Preparation of catalyst protection agent: adopt the method of step-by-step co-precipitation, the specific process is: first mix a certain proportion of CuO, ZnO and Al 2 o 3 The precursors of the precursors are dissolved in water together to prepare a mixed solution of Cu, Zn and Al precursors, and then a certain amount of CaO and Fe 2 o 3 The precursor is dissolved in water to prepare a precursor mixed solution containing Ca and Fe, wherein CuO / ZnO (weight ratio)=1 / 1, CuO / Al 2 o 3 (weight ratio) = 2.67 / 1, CuO / CaO (weight ratio) = 20 / 1, CuO / Fe 2 o 3 (weight ratio)=13.3 / 1, and prepare corresponding amount of Na 2 CO 3 and NaHCO 3 The mixed solution of which, Na 2 CO 3 / NaHCO 3 (molar ratio) = 10 / 1, then at 75 ° C, the precursor solution is precipitated in two steps, wherein the precursor solution and Na 2 CO 3 and NaHCO 3 The drop rate of the mixed aqueous solution is matched to control the pH value of the precipitation to ...

Embodiment 2

[0033] CuO-ZnO-Al 2 o 3 -CaO-Fe 2 o 3 The preparation of the catalyst protection agent: adopt the co-precipitation method, the specific process is: first mix a certain ratio of CuO, ZnO, Al 2 o 3 , CaO and Fe 2 o 3 The precursors of the precursors are dissolved in water together to prepare a precursor mixed solution of Cu, Zn, Al, Ca and Fe, wherein CuO / ZnO (weight ratio)=1 / 4, CuO / Al 2 o 3 (weight ratio) = 1 / 1.33, CuO / CaO (weight ratio) = 15 / 1, CuO / Fe 2 o 3 (weight ratio)=3.75 / 1, and prepare corresponding amount of Na 2 CO 3 and NaHCO 3 The mixed solution of which, Na 2 CO 3 / NaHCO 3 (molar ratio) = 5 / 1, then at 70 ° C, the precursor solution is precipitated in two steps, wherein the precursor solution and Na 2 CO 3 and NaHCO 3 The drop rate of the mixed aqueous solution is matched to control the pH value of the precipitation to be 7-9. After the precipitation is completed, it is aged at 70°C for 2 hours, then dried at 120°C for 12 hours, and roasted at 280°C ...

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Abstract

The invention relates to the field of catalyst protection agents, and discloses a methanol catalyst protection agent and a preparation method thereof. The methanol catalyst protection agent comprises copper oxide, zinc oxide, alumina, calcium oxide, and iron oxide and / or manganese oxide; and the protection agent concretely comprises 3-65 wt% of copper oxide, 3-65 wt% of zinc oxide, 5-25 wt% of alumina, 5 wt% of calcium oxide and 0.05-4 wt% of iron oxide and / or manganese oxide. The invention also discloses the preparation method of the methanol catalyst protection agent. The protection agent plays a role in simultaneously removing toxic substances such as sulfides and carboxides in a synthetic gas obtained after low-temperature methanol washing under the synergistic action of various metal oxides in order to protect a methanol catalyst and prolong the service life.

Description

technical field [0001] The invention relates to the field of catalyst protection agents, in particular to a methanol catalyst protection agent and a preparation method thereof. Background technique [0002] Methanol is a potential clean fuel that can replace gasoline, and it is also an important chemical raw material. In recent years, with the development of the national economy, China's methanol consumption has grown rapidly, and the corresponding output has continued to increase. The raw material gas used for synthesizing methanol is mainly the synthesis gas obtained by pyrolysis of coal. The synthesis gas will also contain a certain amount of sulfur, chlorine, and a small amount of carbonyl iron, nickel carbonyl and other toxic substances after the low-temperature methanol washing process. At present, the catalysts for synthesizing methanol are mainly Cu-Zn-Al catalysts, which are easily poisoned by reactions with sulfur elements or metal carbonyls, thereby affecting the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/56
CPCC01B3/56
Inventor 刘媛张玉龙孔劼琛徐晓颖张凡邱正璞杨盼盼孙琦缪平
Owner CHNA ENERGY INVESTMENT CORP LTD
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