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Hydrocarbon catalytic cracking method with high yield of gasoline

A catalytic cracking and gasoline technology, which is applied in the field of hydrocarbon catalytic cracking of prolific gasoline, can solve problems such as difficult process control, and achieve the effects of adjustable pore volume, excellent activity, and improved catalytic cracking selectivity.

Active Publication Date: 2021-04-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many cases, the disadvantage of this method is that it is difficult to control the process during the preparation process.

Method used

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  • Hydrocarbon catalytic cracking method with high yield of gasoline
  • Hydrocarbon catalytic cracking method with high yield of gasoline
  • Hydrocarbon catalytic cracking method with high yield of gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Add 1000g NaY molecular sieve (dry basis) into 7L deionized water, under stirring, add 350g ammonium chloride, adjust the pH value of the slurry to 3.50 with hydrochloric acid, stir at 85°C for 1h, then filter and wash, the obtained filter cake and 250mL of rare earth chloride and 2.2L of deionized water were mixed, stirred for 0.5h, spray-dried, and then hydrothermally roasted in a roaster under a 100% steam atmosphere at a roasting temperature of 600°C for 2 hours.

[0059](2) Continue to mix the molecular sieve obtained in step (1) with ammonium chloride and water according to the weight ratio of molecular sieve (dry basis): ammonium salt: water = 1:0.3:7 to form a slurry. Stir under the conditions for 1 hour, add 1% (relative to the molecular sieve dry basis) cationic polyacrylamide, stir for 5 minutes, then add ammonium carbonate, the amount of ammonium carbonate added meets the weight ratio of ammonium carbonate: IIIB group elements (calculated as oxides) = 0....

Embodiment 2

[0063] (1) Except that no filter aid cationic polyacrylamide was added to the molecular sieve slurry exchanged with ammonium salt in step (2) of Example 1, other conditions were the same as in Example 1 to obtain molecular sieve Z-2 of the present invention.

[0064] (2) Add 600g (dry basis) of molecular sieve Z-2 into 1.2L of deionized water, and perform sand milling so that the median particle size D(v, 0.5) of the molecular sieve is less than 5 μm to obtain molecular sieve slurry Z-2J. Mix 425g of alumina sol, 1972g of kaolin, 943g of pseudoboehmite, and 4.9L of water for beating, add 50mL of hydrochloric acid, heat up to 50°C, stir for 1 hour, then cool down to 25°C, add molecular sieve slurry Z-2J, and stir for 15 minutes , then add 240g alkaline silica sol, 180mL water glass, the pH value of the final slurry is 3.57, continue to stir for 30 minutes, after homogeneous spray drying molding, roasting, washing, drying, the catalyst C-2 of the present invention is obtained.

Embodiment 3

[0075] (1) Add 2000g of NaY molecular sieve (dry basis) into 20L of deionized water, under stirring, add 600g of ammonium sulfate, adjust the pH value of the slurry to 3.45 with hydrochloric acid, stir at 90°C for 1h, then filter and wash, the obtained filter cake is the same as 542g Yttrium nitrate and 4.8L deionized water were mixed to make NaY molecular sieve (dry basis): the weight ratio of yttrium compound (in terms of yttrium oxide) was 1:0.08, stirred for 0.5h, spray-dried, and heated in a roasting furnace under 100% water vapor Hydrothermal calcination was carried out under the atmosphere, the calcination temperature was 620° C., and the calcination time was 1.5 hours.

[0076] (2) Mix the molecular sieve, ammonium sulfate and water obtained in step (1) according to the weight ratio of molecular sieve (dry basis): ammonium salt: water = 1:0.3:5 to form a slurry. Stir for 1 hour, add 0.02% (relative to the molecular sieve dry basis) cationic polyacrylamide and ammonium ...

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Abstract

A hydrocarbon catalytic cracking process that produces gasoline. The method comprises the steps of contacting hydrocarbon oil with a cracking catalyst under catalytic cracking conditions, injecting diesel oil at a position in the middle of a riser reactor, and performing catalytic cracking reaction to obtain products such as liquefied gas, gasoline, diesel oil, and heavy oil. The catalyst contains modified molecular sieves, clay, and pseudo-boehmite; the preparation method of the catalyst includes: the pseudo-boehmite has an acid-dissolving process, is mixed with other components of the catalyst to form a slurry, and alkali is added to the final slurry The pH value of the slurry is kept in the range of 3.3-5.0, and then spray-dried, solidified and washed with water to obtain the catalyst. The catalytic cracking catalyst disclosed by the invention has adjustable pore volume, excellent activity stability, cracking reaction selectivity and heavy metal pollution resistance; the method provided by the invention obviously increases the yield of gasoline.

Description

technical field [0001] The invention relates to a hydrocarbon catalytic cracking method for producing gasoline, in particular to a method for catalytically cracking and producing gasoline under catalytic cracking conditions by adopting diesel back-refining and contacting hydrocarbon oil with a cracking catalyst. Background technique [0002] Under the new economic normal, China's main refined oil consumption is still on the rise, the rigid demand for gasoline is growing rapidly, while the growth rate of diesel demand is greatly reduced, and the diesel / gasoline ratio in the market demand has dropped significantly. In the face of market changes, in order to use precious oil resources more efficiently and cleanly, meet market demand and produce more gasoline, the refining research and development department has actively developed new technologies in recent years, playing an important role in supporting the future development of the refining industry and responding to market chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/05B01J29/06B01J29/08B01J29/70B01J29/82B01J29/89
CPCB01J29/06B01J29/088B01J29/7007B01J29/82B01J29/89C10G11/05C10G2300/1033C10G2300/1077C10G2400/02C10G2400/04
Inventor 孙书红侯凯军郑云锋黄校亮苏怡潘志爽袁程远高永福刘明霞孙雪芹
Owner PETROCHINA CO LTD
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