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Method for separating n-alkanes in gasoline to improve octane number of gasoline

A gasoline octane number and gasoline technology, which is applied in the field of separating n-alkanes in gasoline to increase gasoline octane number, can solve the problems of inability to separate n-alkanes, low distillation range and low octane number of catalytic cracking gasoline, and achieve environmental friendliness , Simple equipment, stable separation process

Active Publication Date: 2018-03-09
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low octane number of n-paraffins (n-heptane RON=0, and the RON of n-alkanes above C7 is a negative number), the n-paraffins with low octane number can be separated by complexing agent and n-alkanes in gasoline. The alkanes are separated to increase the octane number of the product oil, but due to the low boiling range of catalytic cracking gasoline, the conventional urea complexation method cannot separate the n-alkanes

Method used

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  • Method for separating n-alkanes in gasoline to improve octane number of gasoline
  • Method for separating n-alkanes in gasoline to improve octane number of gasoline
  • Method for separating n-alkanes in gasoline to improve octane number of gasoline

Examples

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Effect test

Embodiment 1

[0042] according to figure 1 The process shown is to purify and recover FCC gasoline, and cut 100kg / h FCC gasoline 101 into 50kg light component oil 102 and 50kg heavy component oil 103 through step 1 at 100°C; heavy component oil 103 is added to 50kg through step 2 / h urea and thiourea (urea: thiourea=1:1, mass ratio) in absolute ethanol solution, gradually cool down to -10°C and stir to obtain a suspension 104; the suspension 104 is vacuum filtered 3 to obtain a solid phase Product 105 and liquid phase product 110; solid phase product 105 is dissolved by adding water in step 4 to obtain oil phase product 106 and cleaning water 107, the quality of the added water is 100~150kg / h; cleaning water 107 can be separated to obtain complexing agent and water; Oil phase product 106 is further washed with water through step 5, and the quality of water is 100~150kg / h, obtains oil phase product 108 (i.e. removed n-paraffin) and cleaning water 109; The liquid phase product 110 that obtain...

Embodiment 2

[0048] according to figure 1 The process shown is to purify and recycle FCC gasoline, cut 100kg / h FCC gasoline 101 into light component oil 102 and heavy component oil 103 through step 1 at 70°C; heavy component oil 103 is added to urea and sulfur through step 2 In the ethanol saturated solution of urea (urea: thiourea=1:1, mass ratio), the mass ratio of the total mass of urea and thiourea to the heavy component oil 103 is 1:1, gradually cool down to -10°C and stir to obtain a suspension Turbid liquid 104; Suspension liquid 104 obtains solid-phase product 105 and liquid-phase product 110 through vacuum filtration 3; Solid-phase product 105 obtains oil-phase product 106 and cleaning water 107 through step 4 and dissolves, and the quality of added water is 100~150kg / h; Cleaning water 107 can be separated to obtain complexing agent and water; Oil phase product 106 is further washed with water through step 5, and the quality of water is 100~150kg / h, obtains oil phase product 108 ...

Embodiment 3

[0053] according to figure 1 The process shown is to purify and recycle FCC gasoline, cut 100kg / h FCC gasoline 101 into light component oil 102 and heavy component oil 103 through step 1 at 100°C; In the ethanol saturated solution of biurea (urea: biuret = 1:1, mass ratio), the mass ratio of the total mass of urea and biuret to the heavy component oil 103 is 1:1, gradually cool down to 0°C and stir Obtain suspension 104; Suspension 104 obtains solid phase product 105 and liquid phase product 110 through vacuum filtration 3; Solid phase product 105 obtains oil phase product 106 and cleaning water 107 through step 4 water dissolving, and the quality of added water is 100 ~150kg / h; Washing water 107 can be separated to obtain urea and water; Oil phase product 106 is further washed with water through step 5, and the quality of water is 100~150kg / h, obtains oil phase product 108 (the n-paraffin that is removed) and Washing water 109; the liquid phase product 110 obtained after vac...

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Abstract

The invention discloses a method for separating n-alkanes in gasoline to improve an octane number of the gasoline. The method comprises the following steps: the gasoline is separated into light component oil and heavy component oil through light-heavy component separation; the heavy component oil and a complexing agent solution are mixed for a complexation reaction, and a liquid-phase product anda solid-phase product are obtained through filtration; the liquid-phase product is washed with water to obtain an oil-phase product; and the light component oil and the oil-phase product are mixed toobtain product oil, so that the octane number of the gasoline is improved. The method provided by the invention adopts a mixture of urea and one selected from thiourea, biuret and biurea as a complexing agent to complex and separate the n-alkanes in the gasoline, and the effects are significantly improved compared with those of a current method for complexing and separating the n-alkanes by individually adopting the urea; in the method provided by the invention, the complexing agent and the n-alkanes are subjected to the complexation reaction at a room temperature or less, thereby facilitatingimproving the separation effects of the n-alkanes; and the method is not only suitable for the catalytic cracking gasoline, but also suitable for the separation process of other gasoline, straight-run diesel oil, isomerized diesel oil, and a composition of other normal and isohydrocarbons containing components of n-alkanes with 6 or more carbons.

Description

technical field [0001] The invention relates to a method for increasing the octane number of gasoline, in particular to a method for separating normal alkanes in gasoline and increasing the octane number of gasoline. Background technique [0002] The gasoline octane number is a numerical index to measure the anti-knock combustion ability of gasoline in the cylinder, and a high value indicates good anti-knock performance. At present, the method of increasing the octane number generally adopts secondary processing technology, such as hydroreforming, isomerization, alkylation, etherification, etc. to improve the grade of gasoline. If the octane number still does not meet the standard after secondary processing, it can The octane number of gasoline is increased by adding gasoline antiknock agents. Conventional additives are Mn gasoline antiknock agents such as MMT, CMT, and NMT, but the maximum RON is increased by 2 to 2.8 units, or by blending high-octane number components (suc...

Claims

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Application Information

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IPC IPC(8): C10G29/20
CPCC10G29/205C10G2300/305
Inventor 耿春宇郝栩陶智超高军虎李莹杨勇李永旺
Owner SYNFUELS CHINA TECH CO LTD
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