Microspherical ethylene oxychlorination catalyst preparation method

An ethylene oxychlorination catalyst, spherical technology, applied in the field of preparation of ethylene oxychlorination catalysts, can solve the problems of loss, reduction of catalyst effective specific surface area, uneven dispersion of active components, etc.

Active Publication Date: 2011-05-11
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The first technical problem to be solved by the present invention is that in the prior art, the ethylene oxychlorination catalyst adopts the co-precipitation method to prepare the alumina microsphere carrier containing the main active component, and then uses the impregnation method to realize the oxidation of other auxiliary active components. The loading on the aluminum microsphere carrier, the preparation method adopts the follow-up independent impregnation method to easily lead to the uneven dispersion of the active component on the carrier, thereby affecting the catalytic activity of the catalyst, and then provides a method that can be used in the preparation of alumina microspheres In the process of carrier, the uniform loading of main active component and auxiliary active component is realized at the same time, and the method of preparing ethylene oxychlorination catalyst by coupling coprecipitation method and impregnation method
[0010] The second technical problem to be solved by the present invention is that in the process of preparing the ethylene oxychlorination catalyst in combination with the coprecipitation method and the impregnation method in the prior art, when the copper-containing alumina carrier microspheres are prepared by the coprecipitation method, water is used to The co-precipitate is slurried and spray-dried to shape, and the prolongation of the spraying time will easily lead to uneven di

Method used

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  • Microspherical ethylene oxychlorination catalyst preparation method
  • Microspherical ethylene oxychlorination catalyst preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Weigh 1000g of aluminum hydroxide powder, add it to 1200ml of 30% sodium hydroxide solution by mass, set the temperature at 95°C for reaction, and prepare aluminum oxide and sodium hydroxide with a weight percentage of 1.15% Sodium metaaluminate solution;

[0056] The preparation mass percentage concentration is the hydrochloric acid solution of 25%;

[0057] Preparation mass percentage concentration is the cupric chloride active component solution of 20%;

[0058] A magnesium chloride additive solution with a mass percentage concentration of 30% is prepared.

[0059] Using the one-way method, place 1000ml of the sodium metaaluminate solution in a self-made precipitation kettle with a stirrer, gradually add 1200ml of hydrochloric acid solution with a mass percentage concentration of 25%, and turn on the stirrer to stir it for 5h. Precipitation reaction, in which the reaction temperature is set at 30°C and the pH value is 9; after the reaction is completed, the precipi...

Embodiment 2

[0065] Weigh 1000g of aluminum hydroxide powder, add it to 800ml of sodium hydroxide solution with a concentration of 30% by mass, set the temperature to 125°C for reaction, and prepare aluminum oxide and sodium hydroxide with a weight percentage of 2.25% Sodium metaaluminate solution;

[0066] The preparation mass percentage concentration is the hydrochloric acid solution of 40%;

[0067] Preparation mass percentage concentration is the cupric chloride active component solution of 20%;

[0068] The preparation mass percent concentration is the magnesium chloride auxiliary solution of 30%;

[0069] A potassium chloride additive solution with a mass percent concentration of 30% was prepared.

[0070] Using the one-way method, place 1000ml of the sodium metaaluminate solution in a self-made precipitation kettle with a stirrer, gradually add 980ml of hydrochloric acid solution with a mass percent concentration of 40%, and turn on the stirrer to stir it for 0.5h Carry out a pre...

Embodiment 3

[0076] Weigh 1000g of aluminum hydroxide powder, add it to 1100ml of sodium hydroxide solution with a mass percent concentration of 30%, set the temperature at 105°C for 2 hours, and prepare aluminum oxide and sodium hydroxide with a weight percent of 1.8 % sodium metaaluminate solution;

[0077] The preparation mass percentage concentration is the nitric acid solution of 40%;

[0078] Preparation mass percentage concentration is the cupric chloride active component solution of 20%;

[0079] The preparation mass percent concentration is the magnesium chloride auxiliary solution of 30%;

[0080] Prepare a solution of cerium nitrate additive with a mass percent concentration of 30%.

[0081] Using the co-current method, 1000ml of the sodium metaaluminate solution and 940ml of nitric acid solution with a mass percent concentration of 40% were gradually added to the self-made precipitation kettle with agitator at the same time, and the agitator was turned on to stir it for 1.0h ...

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Abstract

The invention discloses a microspherical ethylene oxychlorination catalyst preparation method, which comprises the following six steps: solution preparation; precipitation and reaction; peptization; active component and assistant component homogenization; spray forming; and post-treatment. Solution of an active component and solution of an assistant component are dissolved in peptized pulp; a proper amount of dispersant and pore-expanding agent are added into the pulped sol solution to ensure the active component and the assistant component are uniformly distributed in the sol solution; the dispersant can prevent active and assistant component deposition caused by the prolongation of spray time; and the added proper amount of pore expanding agent can expand formed pore passage with a microspherical structure in a spraying process of the sol solution so as to improve the volume of the pore passage of a catalyst carrier and improve the pore volume and specific area of the catalyst.

Description

technical field [0001] The invention relates to a preparation method of an ethylene oxychlorination catalyst. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose resins. It has the outstanding characteristics of rich raw materials, mature manufacturing technology, low price, and wide application. It has become the second largest general-purpose resin in the world after polyethylene resin. PVC is easy to process, and can be processed by molding, lamination, injection molding, extrusion, calendering, blow molding, etc., so it is widely used in the production of soft plastic products such as artificial leather, film, and wire sheaths, as well as in the production of panels, doors and windows. , pipes and valves and other hard plastic products. [0003] Polyvinyl chloride is polymerized from vinyl chloride (VCM) monomer. Vinyl chloride is an important organic chemical raw material with a large tonnage. Most of it is used to produce polyviny...

Claims

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Application Information

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IPC IPC(8): B01J37/00B01J37/04B01J35/10B01J23/72B01J23/78B01J23/83C07C19/045C07C17/156
Inventor 蒲延芳刘丽芝
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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