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Catalyst for preparing ethene ethyl benzene from ethene and benzene in dry gas, preparation method and application thereof

A kind of catalyst, the technology of ethylbenzene, be used in the catalyst field of producing ethylbenzene

Inactive Publication Date: 2006-10-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the process of using small-grain Y-modified molecular sieve catalysts to catalyze the production of ethylbenzene from ethylene and benzene in dry gas, and have high ethylene conversion and ethylbenzene selectivity at the same time.

Method used

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  • Catalyst for preparing ethene ethyl benzene from ethene and benzene in dry gas, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Weigh 120g NaY molecular sieve (produced by Dalian Chemical Synthesis Factory), SiO 2 / Al 2 O 3 The molar ratio is 5.0, the grain size is 500nm, and 1200 ml of 0.8N ammonium nitrate aqueous solution is added, exchanged at 96 °C for 2 hours, repeated twice, then filtered and washed, and dried at 105 °C for 24 hours to obtain NH 4 NaY-1, relative crystallinity 96%, unit cell parameter 2.465nm, Na 2 O weight content 2.20%.

[0045] will NH 4 NaY-1 was placed in a stainless steel sealed container, the temperature was increased at a rate of 5 °C / min, and the temperature was increased to 590 °C, using NH 4 The pressure generated by NaY-1 itself is maintained at a pressure of 0.11MPa (gauge pressure) for 3.5 hours, and the system is lowered to room temperature. Weigh 100 g of the molecular sieve after the above hydrothermal treatment, add 1000 ml of 2.0N concentration of ammonium nitrate aqueous solution, add HNO 3 77g of aqueous solution with a weight concentration of 3...

Embodiment 2

[0047] Weigh 120g NaY molecular sieve (produced by Dalian Chemical Synthesis Factory), SiO 2 / Al 2 O 3 The molar ratio is 4.8, the grain size is 250nm, the exchange conditions are the same as those in Example 1, and only 0.8N concentration of NH is used instead. 4 Cl aqueous solution replaces ammonium nitrate solution to produce NH 4 NaY-2, relative crystallinity 96%, unit cell parameter 2.463nm, Na 2 O weight content 2.05%.

[0048] will NH 4 NaY-2 was placed in a stainless steel sealed container, the temperature was increased at a rate of 4°C / min, the temperature was raised to 585°C, and the system was maintained at a pressure of 0.10 MPa (gauge pressure) for 3.0 hours and then lowered to room temperature. Weigh 100g of the molecular sieve after the above hydrothermal treatment, add 1.8N concentration NH 4 1000 ml of Cl aqueous solution, add 45 g of HCl weight concentration of 35% aqueous solution, exchange treatment at 95°C for 2.5 hours, repeat the exchange twice, fi...

Embodiment 3

[0050] Weigh 120g NaY molecular sieve (produced by Dalian Chemical Synthesis Factory), SiO 2 / Al 2 O 3 The molar ratio was 4.9, the grain size was 100 nm, and the exchange conditions were the same as those in Example 1, and NH was obtained 4 NaY-3, relative crystallinity 95%, unit cell parameter 2.462nm, Na 2 O weight content 1.97%.

[0051] will NH 4 NaY-3 was placed in a stainless steel sealed container, the temperature was increased at a rate of 4°C / min, and the temperature was increased to 580°C. The system was maintained at a pressure of 0.09MPa (gauge pressure) for 3.0 hours and then lowered to room temperature. Weigh 100g of the molecular sieve after the above hydrothermal treatment, add 2.0N concentration NH 4 NO 3 Solution 1000ml, plus HNO 3 The weight concentration is 64g of a 30% aqueous solution, exchanged at 94°C for 2.2 hours, repeated twice, filtered and washed, and dried at 110°C for 24 hours to obtain DHY-3 with a relative crystallinity of 93% and a uni...

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Abstract

The invention discloses a ethyl benzene accelerant preparing method and usage of catalyzing ethane and benzene of dry gas, which is composed of 40-90% fine grain Y-style molecular screen, 0.07-1.5% F and inert component, wherein the mole ratio of SiO2 and Al2O3 of Y-style molecular screen is 6:15; the cell parameter is 2.430-2.455nm; the crystal grain is 70-700nm; the catalytic dry gas contains 10-60% ethane, 100-5000ppm H2S, 1.0-5.0%v Cox, 0.1-1.5%v oxygen, 1000-4000ppm water; the ethane conversion rate is higher than 95%; the ethylbenzene selective is more than 90%; the ethylization selective is more than 99%; The dimethylbenzene content of pure ethylbenzene is smaller than 100ppm.

Description

technical field [0001] The invention relates to a catalyst for producing ethylbenzene, in particular to a Y-type catalyst for preparing ethylbenzene by catalytically separating ethylene and benzene in a catalytic cracking dry gas in different phases. [0002] The present invention also relates to the preparation method of the above-mentioned catalyst. [0003] The present invention also relates to the use of the above-mentioned catalysts. Background technique [0004] Alkyl aromatic hydrocarbons are intermediate products with a wide range of uses, among which ethylbenzene and cumene are the most important. Ethylbenzene is the key raw material for the production of styrene, and styrene is an important monomer for the synthesis of polymer materials, mainly used in the production of styrene. Taking polystyrene and copolymer ABS resin, AS resin, styrene-butadiene rubber, and unsaturated polyester, etc., the world's ethylbenzene production capacity has more than doubled in the pa...

Claims

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Application Information

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IPC IPC(8): B01J29/08C07C2/66C07C15/073
CPCY02P20/52
Inventor 徐龙伢王清遐陈福存谢素娟刘盛林
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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