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Naphtha and light dydrocarbon transformation method

A technology for naphtha and light hydrocarbons, which is applied in the field of upgrading through two-stage reaction, can solve the problems of elevated catalyst bed temperature and difficult control of reaction heat, and achieves reduction of investment and energy consumption, octane number and production. rate increase effect

Active Publication Date: 2019-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Chinese patent CN101875851A discloses a method for non-hydrogenation upgrading of liquefied gas fractions. The raw material of liquefied gas fractions is divided into multiple strands, which respectively enter multiple series-connected upgrading reaction zones, and olefin superposition and isomerization occur in contact with the upgrading catalyst. And aromatization reaction, the reaction product is separated to obtain the vehicle liquefied gas blending component and the gasoline blending component, and part of the gas phase product stream is recycled back to the reaction zone. , the temperature rise of the catalyst bed is too high and the heat of reaction is difficult to control

Method used

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  • Naphtha and light dydrocarbon transformation method
  • Naphtha and light dydrocarbon transformation method

Examples

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Effect test

example 1

[0058] Preparation of dehydrogenation catalyst.

[0059] Take 100 grams (dry basis 95 grams) of γ-Al 2 o 3The carrier is used as the first carrier, and its saturated water absorption is measured to be 82mL, and a predetermined amount of chloroplatinic acid and hydrochloric acid are used to prepare 140mL of impregnating solution, so that the impregnating solution contains 0.5% by mass of Pt and 1.9% by mass of Cl (both dry with respect to alumina. base mass), the volume ratio of impregnating liquid 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 ℃, and the gas / solid volume ratio is 700:1 and baked for 4 hours. The catalyst prepared by the above method contains 0.5% by mass of Pt and 1.0% by mass of Cl based on the dry weight of the alumina...

example 2

[0061] Preparation of modified catalysts.

[0062] (1) Preparation of the second carrier

[0063] Get 120 grams of HZSM-5 molecular sieve powder (produced by Shanghai Huaheng Chemical Plant) with a silica / alumina molar ratio of 56, and 80 grams of aluminum hydroxide powder (produced by Qilu Catalyst Plant, with an alumina content of 76% by mass), and stir evenly Finally, add 4 milliliters of nitric acid with a concentration of 40% by mass and 100 milliliters of deionized water, knead fully, extrude into strips with a diameter of 2 mm, dry at 110 ° C for 8 hours, cut into particles with a length of 2-3 mm, and then dry them at 570 ° C Roast for 4 hours.

[0064] (2) Preparation of catalyst

[0065] Take 100 grams of the above-mentioned second carrier, use 100 milliliters containing 1.0 grams of mixed rare earth chloride (produced by Inner Mongolia Baotou Rare Earth Industry Company, which contains 31 mass % of lanthanum oxide, 51 mass % of cerium oxide, 14 mass % of An aqueo...

example 3

[0068] According to the method of the invention, naphtha and light hydrocarbons are upgraded.

[0069] In the laboratory fixed-bed four-reactor adiabatic medium-scale test device (four reactors in the device are arranged in series, each reactor is equipped with an independent raw material oil and raw gas feeding system, and the outlets of the first three reactors are equipped with online chromatography. instrument, which can detect the composition of the reactor outlet product in real time, and the device is equipped with a gas cycle compressor), and the first two reactors are filled with catalysts, and the total loading amount of the catalyst is 120g, wherein the first reactor is filled with the dehydrogenation catalyst prepared by 15g example 1 , the second reactor was loaded with the modified catalyst prepared in Example 2 of 105g.

[0070] The dehydrogenation catalyst and the modified catalyst are activated before the reaction in the device. The activation medium is nitrog...

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Abstract

The invention relates to a naphtha and light dydrocarbon transformation method which comprises the following steps: enabling naphtha to contact a dehydrogenation catalyst in a first reaction zone, andcarrying out a dehydrogenation reaction under a dehydrogenation reaction condition so as to partially convert cycloparaffin in the naphtha into aromatic hydrocarbon, wherein the aromatic hydrocarboncomprises a first carrier as well as a chlorine element and a VIII group metal which are carried by the first carrier; mixing the reaction product obtained from the first reaction zone with light dydrocarbon, enabling the mixture to contact a transformation catalyst in a second reaction zone, carrying out a transformation reaction, and cooling and separating the obtained reaction product, therebyobtaining a gas phase product and a liquid phase product. By adopting the sectional transformation method provided by the invention, the yield of a liquid product can be increased.

Description

technical field [0001] The invention relates to a method for upgrading naphtha and light hydrocarbons, in particular to a method for upgrading through two-stage reactions. Background technique [0002] With the upgrading of environmental protection requirements and the introduction of new gasoline standards, some low-octane gasoline, such as reformed top oil, condensate, partially hydrocoked gasoline and straight-run gasoline, etc., urgently need to find suitable processing technology. Although this part of naphtha is suitable as ethylene raw material, it is difficult to transport due to its high vapor pressure. If there is no ethylene plant near the enterprise, it is difficult to use it for ethylene production. At present, catalytic reforming is the main device used by refineries to produce aromatics and high-octane gasoline blending components. Reformed gasoline, as a gasoline blending component, has the characteristics of high octane number and high yield of liquid produ...

Claims

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Application Information

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IPC IPC(8): C10G35/06C10G35/09B01J23/42B01J29/60
CPCB01J23/42B01J29/605C10G35/06C10G35/09C10G2300/70C10G2400/02
Inventor 任坚强于中伟王子健马爱增王杰广张新宽刘洪全马冲马云超
Owner CHINA PETROLEUM & CHEM CORP
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