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Method using naphtha to prepare alkane

A naphtha and alkane technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of high production cost, complex process, low olefin recovery rate, etc., achieve less impurity content and simple preparation process , the effect of high purity

Inactive Publication Date: 2018-10-16
陈久仓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the processing method of naphtha is mainly to prepare olefins, the process is complicated, the production cost is high, and the recovery rate of olefins is low

Method used

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  • Method using naphtha to prepare alkane

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Effect test

Embodiment 1

[0029] A method for preparing alkanes from naphtha, comprising the following steps:

[0030] (1) Mix naphtha and desulfurizer evenly, stir and bake in a vacuum oven at 50°C for 1 hour;

[0031] (2) Send the roasted mixed liquid into the distillation tower, control the temperature at the bottom of the tower to 95°C, and the temperature at the top of the tower to 150°C, collect the sulfur-containing mixture from the bottom of the tower, and collect the desulfurized naphtha from the top of the tower ;

[0032] (3) The naphtha after desulfurization is put into a fixed-bed reactor, a hydrogenation catalyst is added in the reactor, and hydrogen is circulated to carry out a hydrogenation reaction to obtain hydrocarbons comprising chain hydrocarbons and cyclic hydrocarbons;

[0033] (4) adding a ring-opening catalyst to react in the fixed-bed reactor after the step (3) reaction;

[0034] (5) The product after the reaction of step (4) is sent to a rectification tower for rectificatio...

Embodiment 2

[0048] A method for preparing alkanes from naphtha, comprising the following steps:

[0049] (1) Mix naphtha and desulfurizer evenly, stir and bake in a vacuum oven at 55°C for 2 hours;

[0050] (2) Send the roasted mixed liquid into the distillation tower, control the temperature at the bottom of the tower to 135°C, and the temperature at the top of the tower to 160°C, collect the sulfur-containing mixture from the bottom of the tower, and collect the desulfurized naphtha from the top of the tower ;

[0051] (3) The naphtha after desulfurization is put into a fixed-bed reactor, a hydrogenation catalyst is added in the reactor, and hydrogen is circulated to carry out a hydrogenation reaction to obtain hydrocarbons comprising chain hydrocarbons and cyclic hydrocarbons;

[0052] (4) adding a ring-opening catalyst to react in the fixed-bed reactor after the step (3) reaction;

[0053] (5) The product after the reaction of step (4) is sent to a rectification tower for rectificatio...

Embodiment 3

[0067] A method for preparing alkanes from naphtha, comprising the following steps:

[0068] (1) Mix naphtha and desulfurizer evenly, stir and bake in a vacuum oven at 60°C for 1 hour;

[0069] (2) Send the roasted mixed solution into the distillation tower, control the temperature at the bottom of the tower to 115°C, and the temperature at the top of the tower to 140°C, collect the sulfur-containing mixture from the bottom of the tower, and collect the desulfurized naphtha from the top of the tower ;

[0070] (3) The naphtha after desulfurization is put into a fixed-bed reactor, a hydrogenation catalyst is added in the reactor, and hydrogen is circulated to carry out a hydrogenation reaction to obtain hydrocarbons comprising chain hydrocarbons and cyclic hydrocarbons;

[0071] (4) adding a ring-opening catalyst to react in the fixed-bed reactor after the step (3) reaction;

[0072] (5) The product after the reaction of step (4) is sent to a rectification tower for rectifica...

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Abstract

The invention discloses a method using naphtha to prepare alkane and relates to the technical field of naphtha processing. The method includes the steps firstly, evenly mixing the naphtha and a desulfurizing agent, and stirring and baking in a vacuum oven; secondly, feeding the baked mixed liquid into a distillation tower, collecting a sulfur-containing mixture from the bottom of the tower, and collecting desulfurized naphtha from the top of the tower; thirdly, placing the desulfurized naphtha into a fixed bed reactor, adding a hydrogenation catalyst into the reactor, and feeding hydrogen in acirculating manner to perform hydrogenation reaction so as to prepare hydrocarbon containing chain hydrocarbon and cyclic hydrocarbon; fourthly, adding a ring opening catalyst into the fixed bed reactor after the reaction in the third step to perform reaction; fifthly, feeding the reaction product of the fourth step into a rectifying tower for rectifying, and collecting the alkane at the top of the rectifying tower. The method has the advantages that the method is simple in process and controllable in operation, and the prepared alkane is high in purity, low in impurity content and few in byproducts.

Description

Technical field: [0001] The invention relates to the technical field of naphtha processing, in particular to a method for preparing alkanes from naphtha. Background technique: [0002] Naphtha (naphtha) is one of the petroleum products, also called chemical light oil. It is a light oil used for chemical raw materials produced by processing crude oil or other raw materials. It is mainly used for reforming and chemical raw materials. Due to different uses, there are various distillation ranges. China stipulates that the distillation range is from the initial boiling point to about 220°C. When used as a reforming raw material for the production of aromatics, the distillate at 70°C to 145°C is called light naphtha; when the purpose is to produce high-octane gasoline, the fraction at 70°C to 180°C is used to weigh naphtha; it is used as When it is used as a solvent, it is called solvent naphtha; aromatic solvents from coal tar are also called weighted naphtha or solvent naphtha....

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02
Inventor 陈久仓
Owner 陈久仓
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