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Method for producing clean gasoline by naphtha upgrading

A naphtha and gasoline technology, which is 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 aromatics, and achieve the effects of increased liquid yield, high octane number, and improved quality

Active Publication Date: 2013-01-09
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. The yield of the obtained modified gasoline is relatively low and the content of aromatics is high.

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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Comparison scheme
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example 1

[0032] Preparation of naphtha upgrading catalyst.

[0033] Take 130g of HZSM-5 zeolite powder (Shanghai Huaheng Chemical Plant) with a silica / alumina molar ratio of 56, 70g of aluminum hydroxide powder (German SASOL), add 6ml of nitric acid with a concentration of 50% by mass and 95g of water. The carrier was prepared by drying at 120°C for 4 hours and calcining at 550°C for 4 hours.

[0034] Take 100g of the carrier and impregnate it with 100ml of an aqueous solution containing 1.0g of mixed rare earth chloride (produced by Inner Mongolia Baotou Rare Earth Industry Co., Ltd., which contains 14.6% by mass lanthanum oxide, 24.0% by mass cerium oxide, 6.6% by mass praseodymium oxide, and 1.9% by mass neodymium oxide) 2hr, 120°C drying for 8 hours, 550°C roasting for 4hr to prepare catalyst A, in which the mixed rare earth oxide content is 0.43% by weight (fluorescence analysis), the HZSM-5 content is 70.4% by mass, and the γ-alumina content is 29.17% by mass .

[0035] The catalyst A...

example 2～5

[0037] The following example uses light naphtha as a raw material to carry out a non-hydrogen upgrading reaction according to the method of the present invention.

[0038] Pass the naphtha 1 shown in Table 1 into the fractionation tower for fractionation, and appropriately control the temperature at the top of the tower so that the isopentane oil fractionated from the top of the tower accounts for 20%, 15%, and 10% of the total naphtha respectively. % And 5%, and then pass the deisopentane oil into a 20 ml fixed-bed continuous flow reactor filled with 14 grams of catalyst A, at 350°C, 0.3 MPa and feed mass space velocity 0.4 hr -1 The non-hydrogen upgrading reaction is carried out under the conditions of, and the gasoline obtained by the upgrading reaction is blended with isopentane oil to obtain clean gasoline. The composition of isopentane oil and deisopentane oil obtained by fractional distillation in each example is shown in Table 2, and the product composition and gasoline pr...

example 6～8

[0043] The following example uses light naphtha and carbon four fractions as raw materials for non-hydrogen upgrading reactions according to the method of the present invention.

[0044] A 20 ml fixed bed continuous flow reactor was charged with 14 g of catalyst A. First, fractionate the naphtha 1 shown in Table 1 to separate 20% isopentane oil and 80% deisopentane oil, and then divide the C4 fraction and deisopentane oil shown in Table 5 into The modified raw materials are mixed in different proportions and passed into the reactor at 350℃, 0.3MPa, and the feed mass space velocity is 0.4hr -1 The non-hydrogen upgrading reaction is carried out under the conditions of, the reaction product is sent to the water cooler, separated into gas-liquid two phases, respectively measured and calculated composition, the upgraded gasoline and isopentane oil are blended to obtain clean gasoline components. The content of the C4 fraction in the modified raw material and the composition and proper...

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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 present invention is a method for upgrading naphtha to produce clean gasoline, specifically, a method for producing clean gasoline with low olefin and aromatic content and high-quality liquefied gas from low-octane naphtha. Background technique [0002] With the improvement of environmental protection requirements, my country's new formula standards for motor gasoline require that the content of olefins in gasoline is less than 35%, the content of aromatics is not more than 40%, and the content of benzene is not more than 2.5m%. At present, the finished gasoline on the Chinese market is mainly catalytic cracked gasoline, and the olefin content is much higher than 35%. 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 my co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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