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Preparation method of catalyst for synthesis of pyridine

A technology for synthesizing pyridine and a catalyst, applied in the field of catalysis, can solve problems such as short operating cycle and catalyst life, and achieve the effects of improving life, less equipment investment, and simple production process

Inactive Publication Date: 2014-01-22
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has always had the disadvantages of short operating cycle and catalyst life.

Method used

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  • Preparation method of catalyst for synthesis of pyridine

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Effect test

Embodiment 1

[0014] Take a certain amount of aluminum sulfate and sodium hydroxide solution to neutralize to obtain alumina hydrate, take a certain amount of lead nitrate, lanthanum nitrate, and cerium nitrate and add it to the alumina hydrate for beating and spray drying, and then calcined in a muffle furnace at 550°C Catalyst A in which lead, lanthanum, and cerium accounted for 2.5%, 0.4%, and 0.4% of alumina were prepared in 6 hours.

Embodiment 2

[0016] Take a certain amount of aluminum sulfate and sodium hydroxide solution to neutralize to obtain alumina hydrate, take a certain amount of potassium nitrate, lead nitrate, lanthanum nitrate, and cerium nitrate and add it to the alumina hydrate for beating and spray drying, and then pass through a muffle furnace Calcined at 550°C for 6 hours to prepare catalyst B in which potassium, lead, lanthanum and cerium accounted for 0.2%, 2.5%, 0.4% and 0.4% of alumina respectively.

Embodiment 3

[0018] Take a certain amount of aluminum sulfate and sodium metaaluminate solution to neutralize to obtain alumina hydrate, take a certain amount of potassium nitrate, lead nitrate, lanthanum nitrate, and cerium nitrate and add it to the alumina hydrate for beating and spray drying, and then pass through muffle Calcined in a furnace at 550°C for 6 hours to prepare catalyst C in which potassium, lead, lanthanum and cerium accounted for 0.2%, 2.5%, 0.4% and 0.4% of alumina respectively.

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Abstract

The invention provides a preparation method of a catalyst for synthesis of pyridine. The preparation method is characterized by comprising the following steps: 1) preparing an alumina by using hydrate aluminum salt containing aluminum sulfate and sodium metaaluminate, and a neutralizing agent through a sol-gel method; 2) adding potassium nitrate, lead nitrate and nitrates of rare earth lanthanum and cerium for beating, wherein potassium, lead, lanthanum and cerium respectively account for 0.1-0.3%, 1-3%, 0.1-0.5% and 0.1-0.5% of the alumina; 3) molding the beating material by a spray drying method; and 4) calcining the material subjected to spray drying in a muffle furnace at 350-650 DEG C for 4-8 h.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a method for preparing a catalyst for synthesizing pyridine. Background technique [0002] Pyridine is an important organic chemical raw material. As an intermediate, it is widely used in the synthesis of medicine and pesticides. There are two main sources of pyridine, one is the refining method, and the other is the catalytic synthesis method. Pyridine has been produced mainly by catalytic synthesis since the 1950s due to low yields from extraction methods. However, this method has always had the disadvantages of short operating cycle and catalyst life. Contents of the invention [0003] In order to solve the above-mentioned problems, the present invention adopts the following solutions to achieve. [0004] The present invention is a kind of catalyst preparation method of synthesizing pyridine, it is characterized in that: [0005] 1) Prepare alumina hydrate by sol-gel m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14
Inventor 陈永生于海斌孙春晖许岩刘伟刘冬冬
Owner CHINA NAT OFFSHORE OIL CORP
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