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Catalyst for synthesizing propylene ether into DIPE (Diisopropyl Ether) and preparation method thereof

A technology for the synthesis of diisopropyl ether, which is applied in the field of catalysts for the synthesis of diisopropyl ether from propylene ether, can solve the problems of low conversion rate of reaction raw materials and low selectivity of catalytic products, so as to improve the conversion rate of propylene and DIPE Selectivity, increase the conversion rate of raw materials, and reduce the effect of side reactions

Active Publication Date: 2010-06-30
临沂星火知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of the above catalysts can improve the selectivity of DIPE and the conversion rate of propylene to varying degrees in the process of preparing DIPE, there is still the problem that the conversion rate of reaction raw materials is not high and the selectivity of catalytic products is low.

Method used

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  • Catalyst for synthesizing propylene ether into DIPE (Diisopropyl Ether) and preparation method thereof
  • Catalyst for synthesizing propylene ether into DIPE (Diisopropyl Ether) and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0015] (1) Take 100g of Y-type high silica zeolite with a silicon-aluminum ratio of 23, put it into a 1000ml four-necked flask, then add 600ml of ammonium nitrate solution with a concentration of 1mol / L, under 200 rpm stirring speed, at 80 Exchange four times at -90°C for three hours each time, filter after each exchange, dry at 120°C for 4 hours after the exchange, and roast in a muffle furnace at 550°C for four hours to obtain a modified zeolite;

[0016] (2) Add 100 g of the modified zeolite obtained in step (1) to 600 ml of a mixed solution of chromium (II) nitrate and molybdenum (III) with a concentration of 1 mol / L, and dry at 120 ° C for 12 h after impregnating for 5 h. Roast in the furnace at 550°C for 5 hours, and then press into tablets into 20-30 meshes to obtain the catalyst for the etherification of propylene to diisopropyl ether.

Embodiment 2

[0018] (1) Take by weighing 100g of the Y-type high-silica zeolite with a silicon-aluminum ratio of 23, put it into a 1000ml four-necked flask, then add 600ml of ammonium nitrate solution with a concentration of 1mol / L, at 300 rev / min stirring speed, at 80 Exchange four times at -90°C for three hours each time, filter after each exchange, dry at 120°C for 4 hours after the exchange, and roast in a muffle furnace at 550°C for four hours to obtain a modified zeolite;

[0019] (2) Add 100 g of the modified zeolite obtained in step (1) to a 600 ml mixed solution of chromium (II) nitrate and molybdenum (III) nitrate with a concentration of 1 mol / L, and dry it at 120° C. for 7 hours after immersion for 3 hours. Roast at 450°C for 5 hours in a furnace, and then press into tablets into 20-30 meshes to obtain a catalyst for the etherification of propylene to diisopropyl ether.

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Abstract

The invention discloses a catalyst for synthesizing propylene ether into diisopropyl ether (DIPE), wherein the mol composition of the catalyst is SiO2: Al2O3: Cr2O3:MoO3 of 46:2:1:1. The invention also discloses a preparation method of the catalyst. In the catalyst for synthesizing the propylene ether into the diisopropyl ether, Cr ions and Mo ions which can be taken as active centers of non-protonic acid (L acid) are introduced into zeolite, play a role of the coordinated catalysis performance with the porous performance of the zeolite, which realizes an integrated process of adsorption-catalysis and etherification-desorption, thereby greatly improving the synthesis condition of the DIPE and effectively enhancing the propylene conversion ratio and the DIPE selectivity.

Description

technical field [0001] The invention relates to a catalyst for synthesizing propylene ether into diisopropyl ether, and also relates to a preparation method of the catalyst. Background technique [0002] Diisopropyl ether (DIPE) is currently a widely used gasoline additive component to improve gasoline combustion performance. DIPE has excellent blending performance with gasoline, and is a high-octane gasoline blending component with good oxygen-containing compounds. [0003] At present, DIPE is mainly prepared by the hydration and etherification of propylene: [0004] [0005] Among them, the reaction of the first step of hydration of propylene to isopropanol is very mature, and the key is the second step reaction. In this reaction, the choice of catalyst is very important. Japanese scholar Zhu Yuanzhe (Journal of the Petroleum Society 1987, 30 (3), 174) used the porous strong acidic ion exchange resin Amberlyst-15 as a catalyst to make propylene and isopropanol under th...

Claims

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Application Information

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IPC IPC(8): B01J29/16C07C43/04C07C41/06
CPCY02P20/10
Inventor 张成如
Owner 临沂星火知识产权服务有限公司
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