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A kind of naphtha upgrading method

A naphtha and upgrading technology, which is applied in the treatment of naphtha, petroleum industry, hydrocarbon oil, etc., can solve the problems of huge equipment investment and production energy consumption, strict requirements for raw material impurities, and unfavorable gasoline blending. Improve octane number, improve yield, and achieve the effect of continuous regeneration

Active Publication Date: 2022-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content of aromatics in reformed gasoline is too high, which is not conducive to gasoline blending
In addition, the catalytic reforming process has strict requirements on raw material impurities, and the equipment investment and production energy consumption are huge

Method used

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  • A kind of naphtha upgrading method
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039] Preparation of dehydrogenation catalyst.

[0040] Take 100 grams of γ-Al 2 o 3 Carrier, its saturated water absorption is measured to be 82mL, is made into 140mL impregnating liquid with predetermined amount of chloroplatinic acid, hydrochloric acid, makes containing Pt 0.5 mass %, Cl 1.9 mass % (both relative to the quality of aluminum oxide dry basis) in impregnating liquid, The volume ratio of impregnation solution to carrier is 1.05:1. Separate the carriers into flasks, evacuate and control the vacuum at 0.085MPa, introduce the impregnating solution, rotate and impregnate at 30°C for 3 hours, and rotate at a linear speed of 0.10 m / s, then dry under reduced pressure, and then dry in dry air at 500 ℃, gas / solid volume ratio of 700:1 under the conditions of roasting for 4 hours to obtain a dehydrogenation catalyst, which contains 0.5% by mass of Pt and 1.0% by mass of Cl based on the dry basis of the alumina carrier.

example 2

[0042] Preparation of modified catalysts.

[0043] (1) Preparation of carrier

[0044] Take 67.6 kg of pseudo-boehmite powder (produced by Sasol Company, with an alumina content of 74% by mass), and under stirring conditions, add 300 kg of nitric acid aqueous solution with a concentration of 1.1% by mass, stir for 2 hours to peptize, and then add 55.0 kg of oxidized HZSM-5 zeolite powder (zeolite content: 91% by mass) with a silicon / alumina molar ratio of 60 was stirred at high speed for 3 hours. Drop the prepared slurry into an oily ammonia column containing 8% by mass of ammonia water, take out the wet ball formed in the oily ammonia column, dry at 60°C for 10 hours, and roast at 550°C for 3 hours to obtain a carrier, which is an HZSM-5-containing Zeolite 50% by mass alumina pellets.

[0045] (2) Preparation of modified catalyst

[0046] Get 50 kilograms of carrier, use 50 kilograms containing 4.7 mass % of zinc nitrate, 3.0 mass % of oxidized mixed rare earths (wherein l...

example 3

[0049] The naphtha is modified according to the method of the present invention.

[0050] The fixed-bed reaction zone is composed of an independent fixed-bed reactor, filled with the dehydrogenation catalyst prepared in Example 1, and the loading amount accounts for 30% by mass of the total catalyst. The moving bed reaction zone is composed of an independent moving bed reactor, loaded with the modified catalyst prepared in Example 2, and the loading amount accounts for 70% by mass of the total catalyst. Before the reaction, the dehydrogenation catalyst and the modified catalyst are activated in the device. The activation medium is nitrogen, the pressure is 0.4MPa, the volume ratio of nitrogen to catalyst is 500:1, the activation treatment temperature is 400°C, and the activation time is 2h.

[0051] according to figure 1 In the process shown, the naphtha raw material is introduced into the fixed bed reaction zone for dehydrogenation reaction, and the obtained reaction product...

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Abstract

The invention relates to a method for upgrading naphtha, comprising: introducing naphtha into a fixed bed reaction zone, contacting with a dehydrogenation catalyst, and performing a dehydrogenation reaction under dehydrogenation reaction conditions, so as to convert part of the naphthenes in the naphtha It is an aromatic hydrocarbon; wherein, the dehydrogenation catalyst includes a carrier and chlorine elements and Group VIII metals loaded on the carrier; the reaction product obtained in the fixed bed reaction zone is introduced into the moving bed reaction zone to contact with the reforming catalyst and carry out the reforming reaction to obtain Reaction products and unused catalysts, the reaction products are cooled and separated to obtain gas phase products and liquid phase products, and at least part of the gas phase products are returned to the fixed bed reaction zone; in the bed reaction zone. The liquid product yield and octane number of the upgrading method of the present invention are high.

Description

technical field [0001] The invention relates to a method for upgrading naphtha, in particular to a method for upgrading naphtha through two-stage reactions. Background technique [0002] In recent years, with the upgrading of environmental protection requirements, the content of aromatics in gasoline has been further restricted. The content of aromatics in reformed gasoline is too high, which is not conducive to gasoline blending. In addition, the catalytic reforming process has strict requirements on raw material impurities, and the equipment investment and production energy consumption are huge. Therefore, for naphtha raw materials such as reformed tops, condensate, partially hydrocoked gasoline and straight-run gasoline, more suitable processing technologies need to be developed to produce high-quality gasoline blending components. [0003] Aromatization technology can convert raw materials such as naphtha and light hydrocarbons into low-sulfur and low-olefin gasoline c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G59/02
CPCC10G59/02C10G2300/70C10G2300/1044C10G2300/1037
Inventor 董晨刘彤马冲任坚强王杰广张新宽马云超
Owner CHINA PETROLEUM & CHEM CORP
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