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A kind of mixed acid system containing ionic liquid and nitric acid catalyzes the method for synthesizing alkylated oil

An ionic liquid and alkylated oil technology, which is applied in the production of liquid hydrocarbon mixtures, the petroleum industry, and the treatment of hydrocarbon oil, etc., can solve the problems of high price of ionic liquids and low economical efficiency of new processes, and can accelerate the pace of gasoline upgrading, The effect of improving competitiveness and productivity, increasing octane rating

Active Publication Date: 2017-10-27
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current price of ionic liquids is relatively high, resulting in low economic efficiency of the new process

Method used

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  • A kind of mixed acid system containing ionic liquid and nitric acid catalyzes the method for synthesizing alkylated oil
  • A kind of mixed acid system containing ionic liquid and nitric acid catalyzes the method for synthesizing alkylated oil
  • A kind of mixed acid system containing ionic liquid and nitric acid catalyzes the method for synthesizing alkylated oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Concentrated H 2 SO 4 and HNO 3 The mixed acid acts as a catalyst to catalyze the C4 alkylation reaction. HNO 3The addition amount of is 1wt%. Add an appropriate amount of catalyst to the reaction kettle cleaned with ethanol and dried, tighten the lid of the kettle, fill the reaction kettle with nitrogen to ensure a pressure of 0.4MPa, start the stirrer, and set the rotation speed to 1000r / min. Turn on the feed gas sampling pump and set the sampling rate to 500ml / h. Set the temperature of the circulating alcohol bath to 1°C, and when the thermometer in the reaction kettle reaches the set temperature, add 50ml of raw material gas, and continue the reaction for 10 minutes after the addition is complete.

[0027] After the reaction was over, the stirring was stopped and left to stand for 15 min. After the liquid product is left to stand for stratification, take the upper layer liquid, wash it with 0.05M NaOH solution three times, then wash it with water three times, ...

Embodiment 2

[0032] Concentrated H 2 SO 4 and ionic liquids [Bmim][SbF 6 ] as a catalyst to catalyze the C4 alkylation reaction. The added amount of ionic liquid is 0.1wt%. Reaction steps are as embodiment 1, and evaluation result is as shown in table 3:

[0033] table 3

[0034]

Embodiment 3

[0036] Use H 2 SO 4 and ionic liquids [Bmim][HSO 4 ] as a catalyst to catalyze the C4 alkylation reaction. The addition amount of ionic liquid is 0.6wt%. Reaction steps are as embodiment 1, and evaluation result is as shown in table 4:

[0037] Table 4

[0038]

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PUM

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Abstract

The invention discloses a method for catalytic synthesis of alkylate oil through a mixed acid system containing ionic liquid and nitric acid. The method comprises the steps that iso-butane and olefin are adopted as raw materials, the mixed acid system containing ionic liquid and nitric acid additive modified concentrated sulfuric acid is adopted as a catalyst, a reaction is performed within the temperature range of subzero 10 DEG C to 35 DEG C, the reaction pressure is 0.3-1.0 MPa, the volume ratio of raw materials of iso-butane to olefin is 1:1-100:1, the volume ratio of the catalyst to the raw materials is 1:2-2:1, the reaction time is 0.1-60 min, and alkylate oil is obtained through preparation. The reaction is performed inside a high-pressure reactor where it is ensured that the catalyst and the raw materials are sufficiently mixed. The alkylation reaction selectivity is improved, the alkylate oil has a higher octane value, consumption of sulfuric acid is lowered, environmental pollution is reduced, and the production cost of alkylate oil is lowered.

Description

technical field [0001] The invention relates to a method for synthesizing alkylate oil, in particular to a method for synthesizing alkylate oil from isobutane and olefins through a mixed acid system containing ionic liquid and nitric acid. technical background: [0002] Urban motor vehicle exhaust is one of the important sources of PM2.5, and accelerating the quality upgrade of oil products is one of the important means to control air pollution and smog. Alkylation oil refers to high-purity industrial isooctane produced by alkylation technology of C4 isomeric alkanes and olefins. It has the advantages of high octane number, low vapor pressure, no sulfur, no aromatics, etc., and is an ideal substitute Environmentally friendly high-octane gasoline additive components of MTBE and ethanol. Increasing the blending ratio of isooctane is the most effective way to speed up domestic gasoline upgrading, reduce harmful gas emissions in motor vehicle exhaust and protect the environment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G50/00
CPCC10G50/00C10G2300/1092
Inventor 张锁江周志茂杨飞飞刘瑞霞张军平
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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