Hydrocarbon oil catalytic cracking method

A hydrocarbon oil and catalyst technology, applied in the chemical industry, organic chemistry, chemical recovery, etc., can solve the problem of insufficient selectivity of olefins in the conversion rate of methanol, and achieve the effects of flexible product solutions, reduced consumption, and low investment

Active Publication Date: 2012-12-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] It can be seen from the existing technology that the coupling reaction of methanol conversion and catalytic cracking of petroleum hydrocarbons is limited by process conditions, catalyst activity and selectivity, and methanol conversion and olefin selectivity are not high enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This example illustrates the hydrocarbon oil catalytic cracking method provided by the present invention.

[0056] The feedstock oil for catalytic cracking is Wuhan miscella, which is a mixture of 70% vacuum wax oil and 30% vacuum residue (see Table 2 for the properties of the raw material). The oxygenate feed is methanol aqueous solution (containing 80% by weight of methanol, prepared by adding deionized water to industrial methanol with a purity of 97%).

[0057] Table 2

[0058] project

Density (20℃), g / cm 3

0.9044

Refraction(20℃)

1.5217

Viscosity(100℃)mm 2 / s

9.96

freezing point, ℃

40

Aniline point, ℃

95.8

C wt%

85.98

Hwt%

12.86

S wt%

0.55

N wt%

0.18

Carbon residue wt%

3.0

Distillation range, ℃

initial boiling point

243

5％

294

70％

473

[0059] The preparation ...

Embodiment 2

[0085] This example illustrates the effect of adopting the method of injecting the oxygenate raw material into the stripper in stages in the method provided by the present invention.

[0086] The catalytic cracking raw oil is the same as that in Example 1, which is a mixed oil formed by mixing 70% vacuum wax oil and 30% vacuum residue. The oxygenate feed is methanol aqueous solution (containing 80% by weight of methanol, prepared by adding deionized water to industrial methanol with a purity of 97%).

[0087] Catalyst preparation method is as follows:

[0088] Add 20kg of ZSM-5 zeolite (ZSP-2, product of Sinopec Catalyst Qilu Branch) on a dry basis, add 35kg of deionized water for beating, add USY molecular sieve (DASY2.0 product of Sinopec Catalyst Qilu Branch) 10kg, and then add SAPO -34 molecular sieve (pilot test product of Sinopec Catalyst Jianchang Branch) 20kg, beating evenly. Aluminum sol (commercially available, Al 2 o 3 Content is 25%) 80kg beating, add 30Kg kaol...

Embodiment 3

[0098] This example illustrates the result of the simultaneous injection of methanol and ethanol into the stripping section in the method provided by the present invention.

[0099] The preparation process of the present embodiment catalyst is as follows:

[0100] With 2kg of ZSM-5 zeolite (ZSP-3, iron oxide content 2.5wt%, phosphorus pentoxide content 2.9wt%, Sinopec Catalyst Qilu Branch Company product) on a dry basis, add 45kg deionized water for beating, add REY molecular sieve ( REY, rare earth oxide content 18.7%, unit cell constant 2.469nm, crystallinity 46% performance index, Sinopec Catalyst Qilu Branch product) 35kg, add SRM-8 molecular sieve 15kg again, beat evenly. 15Kg pseudo-boehmite (product of China Aluminum Shandong Aluminum Plant) on a dry basis is added to 100 kg of deionized water for beating, and 2 kg of concentrated hydrochloric acid (commercially available, HCl content 31.5% by weight) is added for beating evenly, then aluminum sol (commercially availabl...

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Abstract

A hydrocarbon oil catalytic cracking method includes: hydrocarbon oil cracking raw materials and catalyst regenerant lifted by steam and entering a riser reactor are contacted for the cracking reaction, the mixture of catalysts and cracking reaction oil gas obtained at an outlet of a riser enters a settler for separation, the separated cracking reaction oil gas ascends to enter a subsequent product separation system through an oil gas pipeline on the top of the settler, the separated carbon deposit catalysts descend to enter a steam stripping section and then enter a regenerator through a spent catalyst circulation line to react with prevailing wind to be burnt, the obtained regenerated fume enters a fume energy recovery system through a fume pipe on the top of the regenerator, and the obtained catalyst regenerant returns to the riser reactor through a regenerant circulation line and lifted by steam to react with the hydrocarbon oil cracking raw materials. The hydrocarbon oil catalytic cracking method is characterized by further including steps of preheating oxygenated compound materials to directly enter the steam stripping section, or mixing all or part of oxygenated compound materials with stripping steam to enter the steam stripping section, and contacting with the carbon deposit catalysts falling into the steam stripping section to perform an oxygenated compound conversion reaction, wherein reaction oil gas generated in the conversion reaction ascends to be mixed with the cracking reaction oil gas to enter an oil gas pipeline on the top of the settler.

Description

technical field [0001] The present invention relates to a method for catalytic cracking of hydrocarbon oil, more specifically to a method for increasing the yield of low-carbon olefins such as ethylene and propylene by combining the catalytic cracking process of petroleum hydrocarbons with the catalytic conversion of oxygen-containing compounds. Background technique [0002] Light olefins include ethylene and propylene, which are the basic raw materials for the production of many important chemical products (such as ethylene oxide, polyethylene, polyvinyl chloride and polypropylene, etc.). With the rapid development of my country's economy and the improvement of people's quality of life, the demand for ethylene and propylene is also increasing rapidly, and the annual growth rate exceeds the world average level. [0003] There are many ways to prepare light olefins. The steam cracking technology of light hydrocarbon raw materials such as naphtha is widely used in the world. M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C07C11/04C07C11/06C07C1/24
CPCY02P20/50Y02P20/584
Inventor 李明罡宗保宁张巍罗一斌舒兴田慕旭宏庄立
Owner CHINA PETROLEUM & CHEM CORP
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