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Alkane crystal lattice oxygen selectivity oxidized activating catalyze cracking catalyst and method of use thereof

A technology of alkane lattice oxygen selectivity and catalytic cracking, which is applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., and can solve problems such as difficulty in meeting supply and demand changes, no public reports, and high energy consumption

Inactive Publication Date: 2008-08-27
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Naphtha steam cracking, it can be said that it is difficult to meet the supply and demand changes in the market
[0005] 3) High energy consumption
[0012] There is no public report on the research in this area

Method used

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  • Alkane crystal lattice oxygen selectivity oxidized activating catalyze cracking catalyst and method of use thereof
  • Alkane crystal lattice oxygen selectivity oxidized activating catalyze cracking catalyst and method of use thereof
  • Alkane crystal lattice oxygen selectivity oxidized activating catalyze cracking catalyst and method of use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: take by weighing 4.04kg (NH 3 ) 2 MoO 4 , dissolved in 5kg of water; weigh 7.06kg of pseudo-boehmite, pour it into 10kg of water, add 0.5kg of 36% hydrochloric acid, and stir to form a gel. Will (NH 3 ) 2 MoO 4 The solution was transferred to the colloid formed by pseudo-boehmite, then 5 kg of silica sol was added, stirred vigorously for 1 h, and spray-dried to obtain MoO 3 / Al 2 o 3 / SiO 2 Lattice oxygen oxidation catalyst particles with a mass ratio of 3 / 6 / 1.

[0028] Weigh 3kg HZSM-5, 3kg kaolin, add to 7.5kg water, then add 2kg aluminum sol, stir vigorously for 1h (slurry A). Weigh 3.53kg of pseudo-boehmite, pour it into 7.5kg of water, add 0.3kg of 36% hydrochloric acid, and stir to form a gel (slurry B). Mix A and B together, add 3kg of aluminum sol, stir vigorously for 1 hour, and then spray dry to obtain HZSM-5 / Al 2 o 3 Catalytic cracking catalyst particles with a mass ratio of 3 / 4 / 3 kaolin.

[0029] After the lattice oxygen oxidation ...

Embodiment 2

[0032] Embodiment 2 Weigh the V of 1.5kg 2 o 5 and 1.04kg of (COOH) 2 2H 2 O, added to 5kg of water, stirred to dissolve (Solution C). Weigh 2.5kg of HZSM-5 and 2kg of kaolin, add to 5kg of water, then add 2kg of silica sol, and stir evenly (slurry D). Weigh 3.53kg of pseudo-boehmite, pour it into 5kg of water, add 0.3kg of 36% hydrochloric acid, and stir to form a gel (slurry E). Mix solution C, slurry D and E together, add 3 kg of silica sol, stir vigorously for 1 h, and then spray dry to obtain V 2 o 5 / HZSM-5 / Al 2 o 3 / Kaolin / SiO 2 A catalyst with dual functions of lattice oxygen oxidation activation and catalytic cracking with a mass ratio of 1.5 / 2.5 / 3 / 2 / 1.

[0033] The catalyst was reacted with the same raw material and under the same conditions on the same reaction device as in Example 1, and the results are shown in Table 2. The yield of ethylene is 9.68%, the yield of propylene is 34.02%, and the yield of ethylene+propylene has reached 43.7%.

[0034] Table...

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PUM

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Abstract

The invention relates to an alkane catalytic cracking catalyst of lattice oxygen selective oxidation and activation and application method thereof. The method mainly includes oxidizing and activating alkane in naphtha with the lattice oxygen in the catalyst to produce oxygen-containing compound which is easy to be cracked, and carrying out catalytic cracking on cracking active sites to produce ethylene and propylene at high conversion rate and high selectivity. Compared with the prior art, the inventive catalyst has greatly reduced reaction temperature and greatly reduced water vapor amount (5wt% of naphtha), thereby greatly reducing the energy consumption of reaction part; high propylene yield and low ethylene yield, thereby improving the ratio of propylene to ethylene; less resultant methane with low added value and high yield of high added value product, thereby facilitating the efficient utilization of raw material; and less resultant methane, ethane and ethylene to greatly reduce material requiring cryogenic separation, thereby obviously reducing energy consumption of compression and separation system.

Description

technical field [0001] The invention relates to an alkane crystal lattice oxygen selective oxidation activated catalytic cracking catalyst and a use method thereof. The preparation method and use method of the catalyst belong to the technical improvement of the process of producing ethylene and propylene by catalytic cracking of naphtha in petrochemical industry. This method mainly uses the lattice oxygen in the catalyst to selectively oxidize and activate the alkanes in naphtha to convert them into oxygen-containing compounds that are easy to crack, and then the cracking reaction occurs on the cracking active site of the catalyst, resulting in high conversion conversion to ethylene and propylene with high efficiency and high selectivity. Background technique [0002] Alkanes in naphtha are ideal raw materials for cracking ethylene and propylene. At present, steam cracking is basically used. At a high temperature of about 800°C and with the participation of a large amount of...

Claims

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Application Information

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IPC IPC(8): B01J29/48C07C4/06C07C11/04C07C11/06C10G11/05
CPCY02P20/52Y02P20/584
Inventor 李春义胡晓燕杨朝合山红红
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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