Method for producing aromatic hydrocarbon and ethylene by taking naphtha as raw material

A technology for naphtha and aromatics, which is applied in naphtha processing, chemical instruments and methods, and the petroleum industry, and can solve problems such as increasing demand for naphtha and low normal paraffin content

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the above-mentioned technology, the naphtha is separated by adsorption, and the normal paraffin is used as the steam cracking raw material, although the ethylene yiel...

Method used

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  • Method for producing aromatic hydrocarbon and ethylene by taking naphtha as raw material
  • Method for producing aromatic hydrocarbon and ethylene by taking naphtha as raw material
  • Method for producing aromatic hydrocarbon and ethylene by taking naphtha as raw material

Examples

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example 1

[0086] In this example, naphtha is hydrorefined.

[0087]In a 20 milliliter fixed bed continuous flow reactor, fill 20 milliliters of hydrorefining catalyst A (RS-1 catalyst, produced by Sinopec Catalyst Changling Branch Company), which contains 0.03 mass % CoO, 2.0 mass % NiO, 19.0 mass% WO 3 , 0.7% by mass of F and 78.27% by mass of Al 2 o 3 .

[0088] The naphtha with the composition and properties listed in Table 1 was heated at 290°C, the hydrogen partial pressure was 1.6MPa, the hydrogen / hydrocarbon volume ratio was 200:1, and the feed volume space velocity was 8.0h -1 Under certain conditions, it is passed into the above-mentioned reactor filled with catalyst A for hydrogenation refining, and the reaction product enters the water cooler and is separated into two phases of gas and liquid, which are measured separately and analyzed for composition. The composition and properties of the naphtha obtained after refining are shown in Table 2.

[0089] Table 1

[0090] ...

example 2～3

[0095] The following examples carry out catalytic reforming according to the method of the present invention.

[0096] Using PtSn / γ-Al 2 o 3 Catalyst B (GCR-100A, produced by Hunan Jianchang Petrochemical Co., Ltd.), which contains 0.35% by mass of Pt, 0.30% by mass of Sn, 1.0% by mass of Cl, and the balance is γ-Al 2 o 3 .

[0097] In 100 milliliters of fixed-bed continuous flow reactors, fill 50 milliliters of catalyst B, be the catalytic reforming raw material with the refined naphtha listed in table 2, be 500 ℃ at reaction mass inlet temperature, reaction pressure be 0.34MPa, hydrogen / The hydrocarbon molar ratio is 6.7, and the feed volume space velocity is 20.0h -1 、8.0h -1 The reforming reaction is carried out under certain conditions, and the reforming reaction product is subjected to gas-liquid separation and rectification to obtain reformed liquefied gas and C 5 + Reforming produces oil, and the reaction results are shown in Table 3.

example 4

[0099] Using PtRe / γ-Al 2 o 3 Catalyst C (CB-60 catalyst, produced by Sinopec Catalyst Changling Branch), which contains 0.26% by mass of Pt, 0.26% by mass of Re, 1.0% by mass of Cl, and the balance is γ-Al 2 o 3 .

[0100] In a 100 milliliter fixed-bed continuous flow reactor, 50 milliliters of catalyst C was filled, and catalyst C was presulfurized by adding 0.1 mass % hydrogen sulfide in a hydrogen stream at 425 ° C before use, so that the sulfur content of the catalyst was 0.06 mass %. The refined naphtha listed in Table 2 is used as the raw material for catalytic reforming, when the reaction raw material inlet temperature is 475°C, the reaction pressure is 1.4MPa, the hydrogen / hydrocarbon molar ratio is 6.7, and the feed volume space velocity is 20.0h -1 The reforming reaction is carried out under certain conditions, and the reforming reaction product is subjected to gas-liquid separation and rectification to obtain reformed liquefied gas and C 5 + Reforming produces ...

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Abstract

The invention relates to a method for producing aromatic hydrocarbon and ethylene taking naphtha as a raw material. The method comprises the following steps of: (1) contacting naphtha with a reforming catalyst in a catalytic reforming region to carry out a shallow catalytic reforming reaction in the presence of hydrogen at the pressure of 0.15-3.0 MPa, the temperature of 300-540 DEG C and the volume space velocity of 2.1-50 h<-1>, enabling the conversion rate of naphthenic hydrocarbon in the naphtha to be higher than 85wt%, and enabling the conversion rates from alkane to aromatic hydrocarbon and C4-hydrocarbon to be lower than 30wt%; (2) carrying out aromatic hydrocarbon separation on reformate produced by catalytic reforming in a first aromatic hydrocarbon separation region, so as to obtain aromatic hydrocarbon-rich cut fraction and alkane-rich cut fraction; (3) introducing the aromatic hydrocarbon-rich cut fraction and liquefied gas produced by the catalytic reforming into a steam cracking region, and carrying out a cracking reaction to produce ethylene. According to the method for producing the aromatic hydrocarbon and the ethylene taking naphtha as the raw material, the ethylene can be maximally produced when the naphtha is adequately utilized in a shallow catalytic reforming reaction manner.

Description

technical field [0001] The invention relates to a method for producing aromatic hydrocarbons and ethylene, specifically, a method for producing aromatic hydrocarbons and ethylene using naphtha as a raw material. Background technique [0002] Catalytic reforming and steam cracking are mature industrial technologies in the petrochemical field. The main purpose of catalytic reforming is to produce aromatics, high-octane gasoline and hydrogen. During catalytic reforming, several competing reactions can occur simultaneously, these reactions include dehydrogenation of cyclohexane to aromatics, dehydroisomerization of alkylcyclopentanes to aromatics, dehydrocyclization of paraffins to aromatics, hydrogenation of paraffins Cracking conversion to light hydrocarbon products outside the gasoline boiling range, dealkylation of alkylbenzenes and isomerization of paraffins. In order to obtain high-octane gasoline blending components or aromatics, it is not only desirable to dehydrocycliz...

Claims

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Application Information

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IPC IPC(8): C10G59/02C07C11/04C07C4/04C07C15/00C07C5/367C07C5/387C07C5/41
Inventor 马爱增王杰广
Owner CHINA PETROLEUM & CHEM CORP
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