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Process for preparing high-octane-rating high-cleaning gasoline based on naphtha and methanol as raw materials

A high-octane, naphtha technology, applied in the petroleum industry, naphtha treatment, etc., can solve the problems of large liquefied gas production, gasoline standards, poor economic benefits, etc., to achieve sufficient raw materials and economic benefits Significant, scientific and novel effect

Inactive Publication Date: 2015-09-16
天津市福生染料厂 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two problems in this reaction, the output of liquefied gas is too large, and the economic benefit is poor
Although the octane number of the produced naphtha has increased, it is still not up to the gasoline standard and can only be used as a blending oil

Method used

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  • Process for preparing high-octane-rating high-cleaning gasoline based on naphtha and methanol as raw materials
  • Process for preparing high-octane-rating high-cleaning gasoline based on naphtha and methanol as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Prepare the first reactor catalyst, the catalyst uses SiO 2 / Al 2 o 3 The 38 NKF-5 molecular sieve is molded and roasted, and treated with water vapor with α value = 200. Put the prepared catalyst into the first reactor, the reaction temperature is 321°C, the specific gravity of the raw material is 0.648, the RON (octane number) is 70, the space velocity is 0.25, the specific gravity of the product oil is 0.68g / ml, the RON is 84.5, and gas is produced—— Dry gas (carbon 1 and carbon 2) 2%, C 3 -C 4 Gas contains 19.25%.

Embodiment 2

[0051] Put the prepared catalyst into the second reactor. The main component of the catalyst is SiO2 / Al2O3=480, the grain size is ≈400nm high silicon ZSM-5 and SAPO-11 molecular sieve, the mixing ratio is 85:15, and the reaction temperature is 370℃± 3. Airspeed 0.5h -1 , pure methanol reacted for 192 hours, the conversion rate of methanol was greater than 99.6%, the hydrocarbon number of methanol converted to gasoline was 50.81%, the octane number of gasoline was 94, and the rest was gas, accounting for 49.19%, of which methane was 0.56%, ethylene ethane 4.57%, the rest is liquefied petroleum gas, 44.06% of liquefied petroleum gas above C3, of which olefins account for 21%, accounting for 47.74% of liquefied petroleum gas, the gasoline produced by methanol has an octane number of 94.

Embodiment 3

[0053] Put the prepared catalyst in the second reactor with example two, high silicon ZSM-5 molecular sieve content 68%, SAPO-11 molecular sieve 12%, pseudoboth aluminum 20% as binder, the specific physical and chemical properties of catalyst amount The properties are as follows:

[0054] The ratio of methanol to naphtha in the reactant is 10:5, the space velocity is 0.74, and the reaction temperature is 370°C-380°C. After the reaction, the reaction product is cooled by a cooler, and the reaction product oil and gas are separated by a gas-liquid separator. The calculation is a simple calculation: the hydrocarbon number of methanol is 51.6% for gasoline, 48.4% for gas, part of the olefins in the gas undergoes alkylation reaction, 0.705% of methane in the remaining gas, 3.72% of ethane plus ethylene, and 43.98% is C3 Of the above liquefied petroleum gas, olefins accounted for 25.92%, accounting for 58.94% of liquefied petroleum gas. The resulting oil measured 93 octane.

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Abstract

The invention relates to a process for preparing high-octane-rating high-cleaning gasoline based on naphtha and methanol as raw materials. According to the process, naphtha enters a first reactor, a reaction product is mixed with methanol in a mixer, and the mixture enters a second reactor when the temperature reaches 300-400 DEG C; a reaction product of the second reactor is cooled by virtue of a first condenser and enters a first gas-liquid separator to form gasoline A and gas, gas enters a second heat exchanger through a pressure storage tank, is subjected to heat exchange with a reaction product of a third reactor, is heated to 350-450 DEG C by virtue of a heater and enters the third reactor; the reaction product of the third reactor is cooled by virtue of a second condenser and enters a second gas-liquid separator to form gasoline B and gas. The process has the beneficial effects that the raw materials are sufficient, the process is scientific and novel, the economic benefit is remarkable, a new way is developed for the application of naphtha, and a new process is developed for the preparation of high-octane-rating gasoline from methanol; more than 90% hydrocarbons in methanol are converted into high-octane-rating high-cleaning gasoline, and each 2.46-2.53 tons of methanol can be converted into 1 ton of high-octane-rating high-cleaning gasoline.

Description

technical field [0001] The invention relates to a process for preparing high-octane high-clean gasoline by using naphtha and methanol as raw materials. Background technique [0002] A large amount of condensate oil and light naphtha are produced in the process of oil exploitation, oil refining, and coal chemical oil production, the main component of which is C 5 -C 12 Among the alkanes, there are linear, isomeric and naphthenes, among which catalytic cracking of straight chain hydrocarbons to olefins, naphthenes and polycyclic alkanes are good raw materials for catalytic reforming. Most of the naphtha cannot be used as raw materials for olefin production and reforming. This part of naphtha has a low octane number and does not meet the requirements of anti-knock and cleanliness for motor gasoline. However, this part of naphtha is Good feedstock for alkylated gasoline. Because in this part of raw materials, since the hydrogen atoms on the tertiary carbon atoms in the isopar...

Claims

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Application Information

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IPC IPC(8): C10G59/02
Inventor 刘二明刘光明宋军涛王文桥宋英俊张宇张子夜韩煦李占杰陈春江
Owner 天津市福生染料厂
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