Hydrocarbon catalytic cracking method for maximizing gasoline

A catalytic cracking and gasoline technology, which is applied in the field of hydrocarbon catalytic cracking that produces gasoline, and can solve problems such as process control difficulties

Active Publication Date: 2018-07-10
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 for maximizing gasoline
  • Hydrocarbon catalytic cracking method for maximizing gasoline
  • Hydrocarbon catalytic cracking method for maximizing 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

Disclosed is a hydrocarbon catalytic cracking method for maximizing gasoline. According to the method, on a catalytic cracking condition, hydrocarbon oil and a cracking catalyst are allowed to contactwith each other, diesel oil is injected to the position at the middle of a riser reactor to perform catalytic cracking reaction to obtain products such as liquefied gas, gasoline, diesel oil and heavy oil. The catalyst comprises modified molecular sieves, clay and pseudo-boehmite. A preparation method of the catalyst includes subjecting pseudo-boehmite to acid dissolution and then mixing the samewith other components of the catalyst to form slurry, adding alkaline substance in the slurry to keep pH value of the slurry within the range of 3.3-5.0, and then carrying out spray drying, solidifying and washing to obtain the catalyst. The catalytic cracking catalyst has adjustable volume, has excellent activity stability, cracking reaction selectivity and heavy-metal contamination resistance capacity. The hydrocarbon catalytic cracking method has the effect of increasing yield of gasoline obviously.

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 Applications(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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