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Preparation technology of butadiene catalyst by oxidative dehydrogenation of butene

A technology of oxidative dehydrogenation and production process, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, organic chemistry, etc., and can solve the problem of high catalyst consumption, poor mechanical strength, system blockage, etc. problems, to achieve the effect of simple preparation process, improve mechanical strength and reduce waste

Active Publication Date: 2012-07-18
中国石油集团东北炼化工程有限公司锦州设计院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iron-based catalyst prepared by the method has the advantages of high catalytic activity and high selectivity of the target product; the use of fennel powder as a binder makes the catalyst easy to be crushed, lost, and poor in mechanical strength under the fluidized operation of the fluidized bed , the catalyst consumption is large, and the catalyst powder is easy to cause system blockage

Method used

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  • Preparation technology of butadiene catalyst by oxidative dehydrogenation of butene

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Embodiment 1

[0031] Add the dilute nitric acid solution into a container with iron sheets, react at 50°C for 1 hour, then raise the temperature to 100°C in 15 minutes, and keep the temperature for 30 minutes to obtain a ferric nitrate solution with a mass fraction of 28%; add calcium chloride and zinc oxide Mixed aqueous solution with calcium hydroxide, wherein, the mol ratio of calcium chloride and iron is 14:500, and the mol ratio of calcium hydroxide and iron is 23:500, and the mol ratio of zinc oxide and iron is 125:500; Then use Ammonia water is used as a precipitating agent, and the ammonia water is added dropwise at a rate of 250ml / h until the pH of the solution is 8.3-8.4 to make the solution gel. The colloid after the precipitation will be added 0.5% kale powder binding agent and 0.5% gac (in terms of total weight of iron, calcium chloride, calcium hydroxide and zinc oxide); Aging at ℃ for 10 min, cooling to room temperature, filtering and washing with 40 ℃ ionized water, when th...

Embodiment 2

[0034] Add the dilute nitric acid solution into the container with the iron sheet, react at 55°C for 1.3h, then raise the temperature to 102°C over 20min, and keep the temperature constant for 45min to obtain a ferric nitrate solution with a mass fraction of 30%; add calcium chloride solution, A mixed aqueous solution of zinc oxide and calcium hydroxide, wherein the molar ratio of calcium chloride to iron is 14:500, the molar ratio of calcium hydroxide to iron is 25:500, and the molar ratio of zinc oxide to iron is 250:500; Then use ammonia water as a precipitant, add ammonia water dropwise at a rate of 500ml / h until the pH of the solution is 8.3 to 8.4, and make the solution colloidal; add the colloid after precipitation to 1% scallop powder and 0.5% methyl Cellulose mixture (based on the total weight of iron, calcium chloride, calcium hydroxide and zinc oxide) with the addition of 1% activated carbon (based on the total weight of iron, calcium chloride, calcium hydroxide and ...

Embodiment 3

[0037] Add the dilute nitric acid solution into a container with iron sheets, react at 60°C for 1.5h, then raise the temperature to 105°C in 30min, and keep the temperature constant for 60min to obtain a ferric nitrate solution with a mass fraction of 32%, add calcium chloride, oxidize A mixed aqueous solution of zinc and calcium hydroxide, wherein the molar ratio of calcium chloride to iron is 15:500, the molar ratio of calcium hydroxide to iron is 27:500, and the molar ratio of zinc oxide to iron is 375:500; then Use ammonia water as a precipitant, add ammonia water dropwise at a rate of 750ml / h until the pH of the solution is 8.3-8.4 to make the solution colloidal; add the colloid after precipitation with 2% scallop powder and 1% polyvinyl alcohol Mixture (based on the combined weight of iron, calcium chloride, calcium hydroxide and zinc oxide) with the addition of 2% activated carbon (based on the combined weight of iron, calcium chloride, calcium hydroxide and zinc oxide);...

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Abstract

The invention provides a preparation technology of butadiene catalyst by oxidative dehydrogenation of butane, which comprises the following steps of: dissolving an iron sheet by dilute nitric acid to prepare ferric nitrate solution, adding mixed serous fluid of calcium chloride, calcium hydroxide and zinc oxide, taking ammonia water as precipitator to gelatinize ferric nitrate solution, adding binder and activated carbon to age, cooling to be room temperature, filtering and washing, and retaining a filter cake; performing spray granulation for the filter cake; and activating in a rotary kiln in a roasting way, and screening out catalyst spherical particles with the particle size from 40 mu m to 200 mu m by a vibrating screen after roasting. The catalyst prepared by the preparation technology is high in yield, even in particle size, hard to smash, and good in wear resistance, so that the loss of the catalyst can be reduced, the use quantity of the catalyst can be saved, and the economic benefit can be improved.

Description

technical field [0001] The invention relates to a production process of butadiene oxidative dehydrogenation butadiene catalyst, in particular to a production process of butadiene iron-based spinel composite oxide catalyst for butene oxidative dehydrogenation in a baffle fluidized bed craft. Background technique [0002] Butadiene is an important basic organic raw material in petrochemical industry. It is the main raw material for the production of synthetic rubber. It is also widely used in the synthesis of engineering plastics and organic chemical products. At present, there are two main sources of butadiene, one is obtained from the dehydrogenation of C4 (n-butane and n-butene) fractions in refineries; the other is extracted from the mixed C4 fractions produced by ethylene cracking units get. Due to the low price of butadiene prepared by the extraction method, it has become the main method of butadiene production; in recent years, with the rapid development of the automo...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J35/08C07C11/167C07C5/333
Inventor 赵永祥刘说佘光达张玉马兴攀侯敏杜颖
Owner 中国石油集团东北炼化工程有限公司锦州设计院
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