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Catalyst in oxychlorination reaction as well as its preparation method and application

A chlorination reaction and catalyst technology, which is applied to the oxychlorination reaction catalyst and the fields of preparation and application thereof, can solve the problems of low alkali metal content of the catalyst, no significant improvement in the selectivity of the catalyst, etc. Considerable social benefits and the effect of reducing production costs

Inactive Publication Date: 2004-09-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, since alkali metals such as potassium cannot form precipitates, the content of alkali metals in the catalyst prepared by this method is extremely low, and the catalyst selectivity is not significantly improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Dissolve 9.5kg of copper chloride in 77 liters of hydrochloric acid with a concentration of 33% (weight), add 39.4kg of aluminum hydroxide powder to 64.5 liters of sodium hydroxide aqueous solution at 120°C under normal pressure, stir, =9, carry out co-precipitation reaction, make the sodium metaaluminate solution of sodium hydroxide / aluminum trioxide=1.4~1.7, after precipitation finishes, aging 15 minutes, carry out filtration, peptization, spray drying; Get 150g spray drying The finished material is put into the ammonia water of PH=10~11 and carries out ammonia washing, until the electric conductivity of washing liquid>400(Ω·cm -1 ), then filter, and dry the filter cake at 120°C to obtain copper-containing aluminum oxide microspheres;

[0044] Weigh CeCl 3 ·7H 2 O 6.3840g, KCl 0.2564g, dissolved in 38.4ml of water, impregnated with 120 grams of copper-containing aluminum oxide microspheres, dried at 120°C for 2 hours, and roasted at 550°C for 4 hours to obtain coppe...

Embodiment 2

[0046] The operation steps and methods are the same as those in Example 1, and the composition of the catalyst: 1.5 wt% of cerium and 1.85 wt% of potassium, based on the weight of copper-containing aluminum oxide microspheres. The physical properties of this catalyst and its temperature at 225°C and 0.2MPa, the molar ratio of raw materials: C 2 h 2 :HCL:O 2 =1.64:2:0.64 The reaction results are listed in Table 1.

Embodiment 3

[0048] The operation steps and methods are the same as those in Example 1. The composition of the catalyst: 2.5 wt% cerium and 1.85 wt% potassium, based on the weight of copper-containing aluminum oxide microspheres. The physical properties of this catalyst and its temperature at 225°C and 0.2MPa, the molar ratio of raw materials: C 2 h 2 :HCL:O 2 =1.64:2:0.64 The reaction results are listed in Table 1.

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Abstract

A catalyst for oxychlorination reaction is prepared from Cu-contained alumina microspheres, RE metal chosen from La, Nd, Ce, Pr and Y, and at least one alkali metal through preparing the Cu-contained alumina microspheres and adding active components by impregnation method. Its advantages are high conversion rate of hydrogen chloride (99.75%), high purity of dichloroethane (99.6%), high output rate of dichloroethane (22 g / hr), high selectivity.

Description

technical field [0001] The invention relates to a catalyst for oxychlorination reaction and its preparation method and application, in particular to a catalyst for ethylene oxychlorination reaction by pure oxygen method, its preparation method and application. Background technique [0002] 1,2-Dichloroethane, commonly known as ethylene dichloride (EDC), is a compound that is industrially produced in the millions of tons per year. The compound is cracked and converted into vinyl chloride and hydrogen chloride. Vinyl chloride monomer can be Polymerized into widely used polyvinyl chloride (PVC). The HCL obtained by cracking is separated from VCM, and then contacted with ethylene and oxygen-containing gas in the presence of a catalyst for the production of EDC, which is the oxychlorination reaction. [0003] Catalysts and methods for the production of chlorinated hydrocarbons by the oxychlorination process have been developed over the years. Specifically, the production of 1,2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J37/02
Inventor 黄凤兴齐兰芝刘晓红王红霞杨丹贾春革
Owner CHINA PETROLEUM & CHEM CORP
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