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Method for producing light olefin from inferior crude

A technology for low-carbon olefins and inferior crude oil, which is applied in the petroleum industry, cracking, catalytic cracking, etc., can solve the problems of unsatisfactory economic benefits and low octane number, so as to overcome the low octane number of gasoline and improve the octane number of gasoline. value, and the effect of improving economic efficiency

Active Publication Date: 2012-05-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the paraffinic acid-containing crude oil with a total acid value greater than 0.5mgKOH / g and a K value greater than 12, saturated hydrocarbons account for more than 50% by weight, and a large amount of octane value generated by direct processing by catalytic cracking is very low. Low gasoline fraction, unsatisfactory economic benefits

Method used

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  • Method for producing light olefin from inferior crude
  • Method for producing light olefin from inferior crude
  • Method for producing light olefin from inferior crude

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] (1) Preparation method and composition of catalyst A1:

[0035] Take 1.5 kg of Y molecular sieve, 1.0 kg of ZSM-5 molecular sieve, add 3.5 kg of deionized water and ball mill for 30 minutes to prepare molecular sieve slurry. Add 3.7 kg of kaolin to 8.8 kg of deionized water, stir for 30 minutes, add 0.26 kg of hydrochloric acid, stir for 30 minutes, add 1.6 kg of pseudo-boehmite, and mix for 40 minutes. Carrier slurry was prepared by aging at 60°C for 1 hour. The molecular sieve slurry was added to the aged carrier slurry and stirred for 20 minutes, 4.8 kg of aluminum sol was added, mixed and stirred for 40 minutes, and spray-dried to obtain catalyst A1. A1 contains 34.2% by weight of molecular sieves, 27.4% by weight of inorganic oxides and 38.4% by weight of kaolin, wherein the content of Y-type molecular sieves is 20.5% by weight, and the content of ZRP is 13.7% by weight.

[0036] (2) Preparation method and composition of catalyst B1:

[0037] The difference betw...

Embodiment 1

[0044] Embodiment 1 illustrates the situation that the method provided by the present invention directly catalytically cracks acid-containing inferior crude oil with an acid value of 2.8 mgKOH / g, a K value of 12.5, and a colloid content of 16.6 wt % to produce qualified products and produce more light olefins.

[0045] The medium-sized riser device in Comparative Example 1 was used for the test, and the difference from Comparative Example 1 was that the catalyst used was A1. The physical and chemical properties of the catalyst are shown in Table 1, the properties of the feed oil are shown in Table 2, and the main operating conditions and product distribution are listed in Table 3.

Embodiment 2

[0050] Embodiment 2 illustrates that the method of the reactor form of the riser+fluidized bed provided by the present invention is directly catalytic cracking acid number 3.7mgKOH / g, K value is 12.1, colloid content is that the acid-containing inferior crude oil production of 21.2wt% is qualified products and produce more light olefins.

[0051] Adopt the medium-sized riser device among the embodiment 1 to test, the difference of embodiment 2 and embodiment 1 is, above the outlet of the riser reactor in the device, one section of fluidized bed reaction section is set up, and the internal diameter of this reaction section is 64 millimeters, The height is 0.6 meters; the raw oil is crude oil B, and its properties are shown in Table 2. The catalyst used in Example 2 is a mixture of MLC-500 and B1, and the dry weight ratio of the two is MLC-500:B1=80:20. The physical and chemical properties of the catalyst are listed in Table 1. The main operating conditions and product distrib...

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Abstract

The invention relates to a method for producing low carbon olefin from inferior crude oil, which is characterized by comprising the following steps: preheating the pretreated crude oil of which the total acid number of more than 0.5 mgKOH per gram and the characteristic factor K value is more than 12.1, and then introducing the crude oil into a catalytic cracking reactor directly to be contacted with a catalyst and react under the catalytic cracking reaction condition; separating the reacted oil gas and the catalyst to be generated; delivering the reaction oil gas to a subsequent separation system to obtain products with different distillation ranges, wherein the catalyst to be generated is recycled after steam stripping and regeneration, and active components of the catalyst comprise a Ytype molecular sieve, a molecular sieve with an MFI structure, and an optional beta molecular sieve. The method adopts the molecular sieves with two apertures as the active components of the catalystto process wax based acid-contained crude oil with the K value of more than 12 and the total acid number of more than 0.5 mgKOH per gram, overcomes the defect that the process of the crude oil in theprior art generates more petrol with lower octane numbers so that the economic benefit is lower, is advantageous for generating more low carbon olefin and improving the petrol octane number, and improves the economic benefit for processing the inferior crude oil.

Description

technical field [0001] The invention relates to a catalytic cracking process of hydrocarbon oil in the absence of hydrogen, and more specifically relates to a method for direct catalytic cracking of low-quality crude oil containing acid to produce more light olefins. Background technique [0002] With the continuous extraction of crude oil, light crude oil resources are gradually decreasing, and the proportion of heavy and low-quality crude oil is increasing. The general trend of the world's crude oil quality is to become heavier and worse. The output of crude oil with high sulfur content, high acid value, high metal content and high carbon residue has grown rapidly. It is predicted that the world's low-quality crude oil production will increase from the current 16% to 20% in 2010. From the perspective of my country's oil and gas resources, the three old oil fields of Shengli, Liaohe and Karamay in my country are all high acid value oil fields. The a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/05C10G11/18
Inventor 张久顺侯栓弟何峻毛安国张占柱田松柏汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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