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A method for producing isobutene and high-octane gasoline with n-butene as raw material

A high-octane gasoline and n-butene technology, applied in chemical instruments and methods, processing hydrocarbon oil, petroleum industry, etc., can solve the problem of high yield of cracked gas, small increase of product octane number, low catalyst acid strength, etc. problem, to achieve the effect of enhanced stability

Active Publication Date: 2018-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2011, the total output of MTBE in my country has exceeded 4.5 million tons, while the average operating rate of domestic MTBE devices is only 60%. The insufficient supply of raw material isobutylene has become the bottleneck of the development of MTBE industry.
If the existing technical scheme is used in the non-hydrogenation reforming reaction of by-product gasoline in the process of n-butene skeletal isomerization, because the reaction needs to be carried out at high temperature, the yield of cracked gas will inevitably be too high and the yield of product gasoline will be reduced.
If the existing catalyst is used for the reaction at low temperature (below 300°C), due to the relatively low acid strength of the catalyst, the ideal conversion rate cannot be met, and there are disadvantages of low olefin conversion rate and small increase in octane number of the product

Method used

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  • A method for producing isobutene and high-octane gasoline with n-butene as raw material
  • A method for producing isobutene and high-octane gasoline with n-butene as raw material
  • A method for producing isobutene and high-octane gasoline with n-butene as raw material

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Embodiment 1

[0037] (1) The operating pressure of isomerization reactor 2 is 0.25 MPa, the temperature is 250 °C, and the space velocity is 4 h -1 , the diameter of the reactor is 1200mm, and the height is 2200mm. Each reactor is filled with 2.5m 3 The hydrogen type FER molecular sieve catalyst, a total of 5.0m 3 catalyst. The present invention adopts hydrogen type FER molecular sieve catalyst which is composed of 90% hydrogen type FER molecular sieve and 10% aluminum hydroxide binder, wherein the Si / Al molar ratio of hydrogen type FER molecular sieve is 54. The catalyst has a specific surface area of ​​316 m 2 / g, pressure test strength ≮70N / cm. The preparation process of the catalyst is as follows: mixing and kneading the hydrogen-type FER molecular sieve and alumina binder with an appropriate amount of nitric acid, water, and safflower powder, extruding and forming, and then drying the obtained extrudate at room temperature for 24 hours, and then Dry at 120° C. for 24 hours, and ba...

Embodiment 2

[0046] (1) The operating pressure of isomerization reactor 2 is 0.1 MPa, the temperature is 350°C, and the space velocity is 2 h -1 , the diameter of the reactor is 1200mm, and the height is 2200mm. Each reactor is filled with 2.5m 3 The hydrogen type FER molecular sieve catalyst, a total of 5.0m 3 catalyst. The present invention adopts hydrogen type FER molecular sieve catalyst which is composed of 50% hydrogen type FER molecular sieve and 50% alumina binder, wherein the Si / Al molar ratio of hydrogen type FER molecular sieve is 94. The catalyst has a specific surface area of ​​307 m 2 / g, pressure test strength ≮70N / cm. The preparation process of the catalyst is as follows: mixing and kneading the hydrogen-type FER molecular sieve and alumina binder with an appropriate amount of nitric acid, water, and safflower powder, extruding and forming, and then drying the obtained extrudate at room temperature for 24 hours, and then Dry at 120° C. for 24 hours, and bake at 550° C....

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Abstract

The invention discloses a method for producing isobutene and high-octane petrol by taking n-butene as a raw material. The method comprises the following steps: (1) adding the raw material containing n-butene into an isomerization reactor and reacting in the presence of an isomerization catalyst; (2) adding isomerized reaction effluent into a gas-liquid separation tank, compressing a gaseous product separated after cooling via a compressor, and then adding the gaseous product into a fractionating tower; (3) adding a liquid phase product separated by the separation tank in the step (2) into a non-hydrogenation modification reactor, reacting in the presence of a non-hydrogenation modification catalyst and adding non-hydrogenation modification reaction effluent into the fractionating tower in the step (2); (4) extracting a mixed C4 product containing isobutene from the top of the fractionating tower, and extracting C5<+> gasoline product from the bottom of the fractionating tower. The method is capable of simultaneously obtaining two high-addition-value products which are isobutene and high-octane petrol.

Description

technical field [0001] The invention relates to a method for producing isobutene and high-octane gasoline by using n-butene as raw material. Background technique [0002] As the market demand for high-octane gasoline continues to grow, so too does the need for the incorporation of methyl tert-butyl ether (MTBE) as an octane booster. In 2011, the total output of MTBE in my country has exceeded 4.5 million tons, while the average operating rate of domestic MTBE devices is only 60%. The insufficient supply of raw material isobutylene has become the bottleneck of the development of MTBE industry. [0003] With the lightening of ethylene cracking raw materials, and the impact of ethane cracking route and methanol to olefins project, in recent years, the output of cracking raffinate C4, which is the main source of isobutene, has been decreasing year by year. On the other hand, the rapid development of the methanol-to-olefins project, and its by-product C4 has provided more n-bute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02C07C5/27C07C11/09B01J29/44
CPCB01J29/44B01J2229/186B01J2229/24C07C5/2743C07C2529/44C10G67/02C10G2300/1092C10G2300/305C10G2400/02C07C11/09
Inventor 周峰马会霞乔凯
Owner CHINA PETROLEUM & CHEM CORP