Method for producing clean gasoline by naphtha upgrading

A technology for naphtha and gasoline, applied in the field of clean gasoline and high-quality liquefied gas, can solve the problems of low yield of modified gasoline and high content of aromatic hydrocarbons, and achieve the effects of increasing liquid yield, high octane number and improving quality

Active Publication Date: 2009-02-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology uses full-cut straight-run gasoline, and the amount of C4 mixed in is 20-60% by mass

Method used

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  • Method for producing clean gasoline by naphtha upgrading
  • Method for producing clean gasoline by naphtha upgrading
  • Method for producing clean gasoline by naphtha upgrading

Examples

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example 1

[0032] Preparation of naphtha upgrading catalyst.

[0033] Take 130g of HZSM-5 zeolite powder (Shanghai Huaheng Chemical Factory) with a silica / alumina molar ratio of 56, 70g of aluminum hydroxide powder (Germany SASOL), add 6ml of nitric acid with a concentration of 50% by mass and 95g of water, knead and extrude , dried at 120°C for 4hrs, and calcined at 550°C for 4hrs to obtain a carrier.

[0034] Take 100g carrier, impregnate with 100ml aqueous solution containing 1.0g mixed rare earth chloride (produced by Inner Mongolia Baotou Rare Earth Industry Company, containing lanthanum oxide 14.6 mass%, cerium oxide 24.0 mass%, praseodymium oxide 6.6 mass%, neodymium oxide 1.9 mass%) 2hr, dried at 120°C for 8 hours, and calcined at 550°C for 4hr to obtain catalyst A, wherein the content of mixed rare earth oxide was 0.43% by weight (analysis by fluorescence method), the content of HZSM-5 was 70.4% by mass, and the content of γ-alumina was 29.17% by mass .

[0035] Put the cataly...

example 2～5

[0037] The following examples use light naphtha as raw material to carry out non-hydrogenation modification reaction according to the method of the present invention.

[0038] The naphtha 1 shown in Table 1 is passed into the fractionation tower for fractionation, and the temperature at the top of the tower is properly controlled so that the isopentane oil fractionated at the top of the tower accounts for 20%, 15%, and 10% of the total amount of naphtha respectively. % and 5%, then the deisopentanized oil is passed into 20 milliliters of fixed-bed continuous flow reactors filled with 14 grams of catalyst A, at 350 ° C, 0.3 MPa and feed quality space velocity 0.4hr -1 The non-hydrogen modification reaction is carried out under certain conditions, and the gasoline obtained by the modification reaction is blended with isopentane oil to obtain clean gasoline. The composition of the isopentane oil and de-isopentane oil obtained by the fractional distillation of each example is show...

example 6～8

[0043] The following examples use light naphtha and carbon four fractions as raw materials to carry out non-hydrogenation reforming reaction according to the method of the present invention.

[0044] A 20 ml fixed bed continuous flow reactor was loaded with 14 g of Catalyst A. Firstly, the naphtha 1 shown in Table 1 is fractionated, and 20% of isopentane oil and 80% of deisopentanized oil are separated, and then the carbon four cuts and deisopentanized oil shown in Table 5 are separated by The modified raw materials are mixed in different proportions and passed into the reactor. -1 The non-hydrogen upgrading reaction is carried out under certain conditions, and the reaction product is sent to the water cooler, separated into gas-liquid two phases, measured separately and calculated for composition, and the modified gasoline and isopentane oil are blended to obtain clean gasoline components. See Table 6 for the C4 fraction content in the modified raw material and the compositi...

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Abstract

The present invention relates to a method for producing clean gasoline by upgrading naphtha. The method includes the following steps: naphtha is fractionated in order to separate out isopentane oil and de-isopentane oil, and with the existing of catalyst, the de-isopentane oil is upgraded without hydrogen, so that clean gasoline and liquefied gas are produced. The method can increase the liquid yield of the upgrading reaction and the treatment capacity of a reacting device. In particular, after the isopentane oil is bended with the upgraded gasoline, the liquid yield of the whole reaction canbe greatly increased, and the content of the aromatic hydrocarbon of the blended oil can be greatly reduced.

Description

technical field [0001] The invention relates to a method for producing clean gasoline by upgrading naphtha, in particular, a method for producing clean gasoline and high-quality liquefied gas with low olefin and aromatic content from low-octane naphtha. Background technique [0002] With the improvement of environmental protection requirements, my country's new formula standard for motor gasoline requires that the content of olefins in gasoline should be less than 35m%, the content of aromatics should not exceed 40m%, and the content of benzene should not exceed 2.5m%. At present, the finished gasoline on the Chinese market is mainly FCC gasoline, and the olefin content is much higher than 35m%. The traditional methods of producing clean gasoline that meet the requirements of the new formula include catalytic reforming of naphtha, isomerization of light gasoline, and hydrocracking, etc., but catalytic reforming is still the main method. Therefore, the production capacity of...

Claims

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Application Information

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IPC IPC(8): C10G57/00
Inventor 陈春芳于中伟马爱增孙义兰王子健孟宪波
Owner CHINA PETROLEUM & CHEM CORP
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