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Preparation method of isooctane, isododecane and isohexadecane

A technology for isomerizing dodecane and isomerizing hexadecane, which is applied in chemical instruments and methods, hydrocarbons, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high energy consumption, complex process, Large equipment investment and other problems, to achieve the effect of equipment investment reduction, simple process, equipment investment and energy consumption reduction

Pending Publication Date: 2022-04-15
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two-step synthesis of isooctane and isododecane requires complex process, large equipment investment and high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027](1) Catalyst preparation: 1500ml (1kg) dry A-35 resin (Dow) is packed in the reactor of polytetrafluoroethylene liner, add the concentrated sulfuric acid of 2kg concentration 98%, with reactor airtight, use nitrogen After purging, 500g of fluorine gas was introduced to react, the reaction temperature was 10°C, and the reaction time was 5h. After the reaction was completed, 1kg of water was added to quench, filtered, and washed with deionized water for many times. The fluorine content in the deionized water was detected to be less than 1ppm. After washing, a fluorine-modified polystyrene sulfonic acid resin is obtained. The above-mentioned 1500ml fluorine-modified A-35 resin is filled in a fixed bed with an inner diameter of 25mm, and a mixed solution of palladium nitrate, nickel nitrate, and lanthanum chloride is prepared, and the concentrations are respectively 50g / L, 50g / L, and 25g / L. Feeding by peristaltic pump, space velocity 0.1h -1 , Take the eluent from the outle...

Embodiment 2

[0030] (1) Catalyst preparation: 1500ml (1kg) dry A-35 resin (Dow) is loaded in the reactor of polytetrafluoroethylene liner, adds the concentrated sulfuric acid of 100g concentration 98%, with reactor airtight, uses nitrogen After purging, feed 10g of fluorine gas to react, the reaction temperature is -10°C, and the reaction time is 1h. After the reaction is completed, add 5g of water to quench, filter, and use deionized water to wash for many times. The fluorine content in the deionized water is detected to be less than 1ppm , and the washing is completed to obtain a fluorine-modified polystyrene sulfonic acid resin. Fill the above 1500ml fluorine-modified A-35 resin into a fixed bed with an inner diameter of 25mm, and prepare a mixed solution of palladium nitrate, nickel sulfate, and cerium chloride with concentrations of 5g / L, 100g / L, and 25g / L respectively. Feeding by peristaltic pump, space velocity 5h -1 , Take the eluent from the outlet under the fixed bed to measure ...

Embodiment 3

[0033] (1) Catalyst preparation: 1500ml (1kg) dry A-35 resin (Dow) is loaded in the reactor of polytetrafluoroethylene liner, adds the concentrated sulfuric acid of 500g concentration 98%, with reactor airtight, uses nitrogen After purging, feed 100g of fluorine gas to react, the reaction temperature is 0°C, and the reaction time is 2h. After the reaction is completed, add 100g of water to quench, filter, and use deionized water to wash for many times. The fluorine content in the deionized water is detected to be less than 1ppm. After washing, a fluorine-modified polystyrene sulfonic acid resin is obtained. Fill the above 1500ml fluorine-modified A-35 resin into a fixed bed with an inner diameter of 25mm, and prepare a mixed solution of palladium chloride, nickel sulfate, and ytterbium nitrate with concentrations of 10g / L, 45g / L, and 5g / L respectively. Feeding by peristaltic pump, space velocity 0.5h -1 , Take the eluent from the outlet under the fixed bed to measure the pH v...

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PUM

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Abstract

The invention relates to a preparation method of isooctane, isododecane and isohexadecane, which comprises the following steps: by using hydrogen, isobutene or raffinate C4 as raw materials, adding an auxiliary agent, and synthesizing isooctane, isododecane and isohexadecane in one step in a fixed bed reactor by adopting an oligomerization-hydrogenation bifunctional catalyst under certain temperature, pressure and space velocity conditions. According to the method, oligomerization and hydrogenation are coupled in the same reactor, the process is simple, the device investment is low, the energy consumption is low, and the economic benefit is remarkable.

Description

technical field [0001] The invention relates to a preparation method of isooctane, iso-dodecane and iso-hexadecane. [0002] technical background [0003] Isooctane, colorless, transparent liquid, insoluble in water, flammable, irritating, volatile; mainly used as an additive for gasoline, aviation gasoline, etc. inert solvent. Isododecane and Isohexadecane are highly branched synthetic hydrocarbon solvent oil products, clear, colorless, odorless, almost free of aromatics and sulfur, harmless to the human body, easy to biodegrade, and fast in evaporation. Good compatibility, widely used in cosmetics, metal processing, aerosol and other fields. [0004] Isobutene or mixed C4 oligomerization hydrogenation to prepare isooctane and isododecane is currently the mainstream process for producing isooctane and isododecane. CN1381548A uses mixed carbon four oligomerization and hydrogenation to produce isooctane. This process uses a solid acid catalyst for contact reaction. After t...

Claims

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Application Information

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IPC IPC(8): C07C2/28C07C9/21C07C9/22B01J31/10B01J31/28B01J23/89
Inventor 黄少峰马岩龙许振成任亚鹏黎源
Owner WANHUA CHEM GRP CO LTD
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