Catalytic reforming method for naphtha

A technology for catalytic reforming and naphtha, which is applied in the catalytic reforming of naphtha, processing naphtha, reforming naphtha, etc. question

Active Publication Date: 2012-11-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 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 yield can be increased, but because the normal paraffin content in the naphtha is low, when the same ethylene yield is obtained, the naphtha The demand for oil has increased dramatically

Method used

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  • Catalytic reforming method for naphtha
  • Catalytic reforming method for naphtha
  • Catalytic reforming method for naphtha

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0046] In this example, naphtha is hydrorefined.

[0047] In a 20 ml fixed bed continuous flow reactor, fill 20 ml of hydrorefining catalyst A, which contains 0.03 mass % of CoO, 2.0 mass % of NiO, 19.0 mass % of WO 3 , 0.7% by mass of F and 78.27% by mass of Al 2 o 3 . At 290°C, the hydrogen partial pressure is 1.6MPa, the hydrogen / hydrocarbon volume ratio is 200:1, and the feed volume space velocity is 8.0h -1 The naphtha with the composition and properties listed in Table 1 is hydrorefined under certain conditions. 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 refined naphtha are shown in Table 2.

[0048] Table 1

[0049]

[0050] Table 2

[0051]

[0052] It can be seen from the results in Table 2 that after hydrofining, the contents of olefins, sulfur, nitrogen, arsenic and lead in naphtha meet the requirements ...

example 2～3

[0054] According to the method of the invention, the refined naphtha is catalytically reformed.

[0055] Catalytic reforming reaction using PtSn / γ-Al 2 o 3 Catalyst B, 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 .

[0056] In a 100 milliliter fixed-bed continuous flow reactor, 50 milliliters of catalyst B was loaded, and the refined naphtha listed in Table 2 was used as raw material to carry out catalytic reforming of naphtha. When the reaction raw material inlet temperature is 500°C, the reaction pressure is 0.34MPa, the hydrogen / hydrocarbon molar ratio is 6.7, and the feed volume space velocity is 20.0 and 8.0h respectively -1 The reforming reaction is carried out under certain conditions, and the reforming reaction product is rectified to obtain C 5 + Reforming produces oil, and the reaction results are shown in Table 3.

example 4

[0058] According to the method of the invention, the refined naphtha is catalytically reformed. Using PtRe / γ-Al 2 o 3 Catalyst C, 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 . Before catalyst C is used, 0.1% by mass hydrogen sulfide needs to be added into the hydrogen flow at 425°C for presulfurization, so that the sulfur content of the catalyst is 0.06% by mass.

[0059]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 rectified to obtain C 5 + Reforming produces oil, and the reaction results are shown in Table 3.

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Abstract

The invention discloses a catalytic reforming method for naphtha, which comprises a step that: naphtha is in contact with a reforming catalyst under the conditions that the pressure is 0.15-3.0MPa, the temperature is 300-540 DEG C and the hourly space velocity is 2.1-50/h so as to carry out shallow catalytic reforming reaction, so that the cycloparaffin conversion rate of the naphtha is greater than 85 mass%, and the ratio of converting paraffin into arene and C4-hydrocarbon is less than 30 mass%. According to the method, naphtha can largely produce paraffin while producing arene, so that the naphtha becomes a raw material which both can be used for producing arene and high-quality raw materials for ethylene cracking.

Description

technical field [0001] The invention relates to a naphtha catalytic reforming method, specifically, a catalytic reforming method for producing aromatic hydrocarbons and ethylene cracking raw materials using naphtha as a raw material. Background technique [0002] Catalytic reforming and steam cracking are mature industrial technologies in the petrochemical industry. The main purpose of catalytic reforming is to produce aromatics, high-octane gasoline and rich hydrogen. The main purpose of steam cracking is to produce ethylene and a relatively small amount of propylene. The raw material of the reforming unit is naphtha, and naphtha is the main component in the raw material composition of the steam cracking unit. As crude oil becomes heavier, naphtha yield decreases, and the global demand for ethylene and aromatics continues to increase, the problem of catalytic reforming and steam cracking units competing for raw materials has become more prominent. [0003] During catalytic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G35/085C10G35/09C10G61/04C10G61/06C10G69/08
Inventor 马爱增王杰广潘锦程
Owner CHINA PETROLEUM & CHEM CORP
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