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Benzin naphtha catalytic reforming method

A technology for catalytic reforming and naphtha, which is applied in the direction of catalytic reforming of naphtha, control/regulation of reforming operations, etc., can solve the problems of increased BTX yield, inconspicuousness, and large loss of aromatics, and achieves conversion rate. High, good selectivity and high yield

Active Publication Date: 2012-07-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under suitable reaction conditions, this method can convert almost all paraffins into C 5 - products, while obtaining a higher C 9 + The conversion rate of aromatics, but the loss of aromatics is relatively large, and the increase of BTX yield is not obvious

Method used

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  • Benzin naphtha catalytic reforming method
  • Benzin naphtha catalytic reforming method
  • Benzin naphtha catalytic reforming method

Examples

Experimental program
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preparation example Construction

[0033] The preparation method of the aromatic hydrocarbon lightening catalyst can be prepared by impregnation method, that is, the carrier is impregnated with a solution containing metal components and halogens, then dried, activated with high-temperature water chlorine, and reduced. The method of high-temperature water chlorine activation is to treat the catalyst impregnated with active components with HCl-containing steam, and the H 2 The O / HCl molar ratio is 3-90:1, and the suitable water chlorine activation temperature is 400-800°C, preferably 450-650°C. After the chlorine water is activated, the catalyst is reduced, the gas used for the reduction is hydrogen or carbon monoxide, and the reduction temperature is 250-800°C, preferably 300-500°C.

[0034] The present invention is a kind of improved naphtha catalytic reforming method, if take BTX as target product, because reforming device itself has separated C 6 ~C 8 The fractionation system of the product fraction, the in...

example 1

[0043] This example carries out naphtha catalytic reforming and product separation.

[0044] The continuous reforming catalyst (manufactured by Hunan Jianchang Petrochemical Co., Ltd., brand RC011) is filled in two stages in the reactor of the 200ml test device, with 40ml in the upper stage and 60ml in the lower stage. The naphtha shown in Table 1 is passed into the reforming reactor, and the catalyst has been dried and reduced before feeding. The material flowing out from the reforming reactor passes through the cooler and then enters the high-pressure gas-liquid separator for gas-liquid separation. Part of the separated gas is pressurized by the compressor and then returns to the reforming reactor for circulation. The composition of the reforming catalyst used, the reaction conditions and the composition of the reforming liquid product are shown in Table 2, wherein C 6 ~C 8 Aromatics yield is C 5 + Liquid product yield vs. C 6 、C 7 、C 8 The product of the sum of the a...

example 2

[0053] (1) Preparation of γ-alumina carrier.

[0054] Take 100 grams of aluminum hydroxide powder (brand SB produced by Condea Company) and add 200 grams of deionized water, and stir to make it slurry. Adding 7.5 milliliters of nitric acid with a volume ratio of 1:1 by every 100 grams of SB powder, adding 30 grams of urea and 10 grams of hydrochloric acid solution with a concentration of 36.5 mass % at the same time, stirred for 1 hour, added 30 grams of kerosene and stirred for 1 hour. Dropping balls are formed in the ammonia column. The wet bulb was solidified in ammonia water with a concentration of 6.0% by mass for 1 hour, then filtered, washed 2 to 3 times with deionized water, dried at 60°C for 6 hours, and dried at 120°C for 10 hours, and then dried in dry air at a ratio of 700:1 The gas / solid volume ratio was calcined at 600° C. for 4 hours to obtain the gamma-alumina carrier.

[0055] (2) Preparation of catalyst

[0056] Take 100 grams of the above-mentioned gamma-...

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Abstract

The invention relates to a naphtha catalytic reforming method which includes the steps as follows: the naphtha is pumped into the reactor of a catalytic reforming device; gas-liquid separation is carried out on the reformed product for separating gas components, the light component of C8- as well as the heavy component of C9+; then a light aromatics reaction is carried out on the heavy component of C9+ under the existence of a light aromatics catalyst; the hydrogen used by the light aromatics reaction is from the circulated hydrogen generated from a reforming device; then gas-liquid separation is carried out on the product after the light aromatics reaction; the liquid returns to the liquid product distilling system of the reforming device. The method can fully utilize the heavy component of C9+ and convert the heavy component into light aromatic hydrocarbon, improve the aromatic hydrocarbon yield or the yield of the reformed gasoline during the whole process and improve the character of the gasoline.

Description

technical field [0001] The invention is a method for catalytic reforming of naphtha, specifically, a method for making full use of C in the catalytic reforming product of naphtha. 9 + A method of lightening a heavy product. Background technique [0002] Catalytic reforming is one of the processing technologies of petroleum products. Its process is to convert naphtha into high-octane gasoline or reformed products rich in aromatics through catalytic reaction, and at the same time produce rich and cheap hydrogen. In the catalytic reforming process, naphtha rich in paraffins and naphthenes is in contact with a reforming catalyst containing platinum under certain conditions, and the following reactions mainly occur: dehydrogenation of naphthenes into aromatics, dehydrogenation of paraffins into aromatics, isomerization of paraffins and naphthenes, and hydrocracking of paraffins. [0003] The liquid product of catalytic reforming of naphtha is a hydrocarbon mixture rich in arom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G35/06C10G35/24
Inventor 陈恒芳蔡迎春王杰广任坚强马爱增潘锦程张新宽
Owner CHINA PETROLEUM & CHEM CORP
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