Preparation method for branched alkanes in range of gasoline, aviation kerosene and diesel oil

A technology of aviation kerosene and branched alkanes, which is applied in the preparation of liquid hydrocarbon mixtures, the preparation of organic compounds, chemical instruments and methods, etc., and can solve the problems of rising costs

Active Publication Date: 2018-03-13
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

In the two-step reaction, the separation of the catalyst and the rectification of the product are required, which will lead to an increase in cost

Method used

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  • Preparation method for branched alkanes in range of gasoline, aviation kerosene and diesel oil
  • Preparation method for branched alkanes in range of gasoline, aviation kerosene and diesel oil
  • Preparation method for branched alkanes in range of gasoline, aviation kerosene and diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0026] 1. Preparation of catalyst:

[0027] 1) Preparation of solid acid catalysts: Nafion and Amberlyst resins, Y-type molecular sieves, montmorillonite K-10 and KSF are commercial catalyst products purchased directly.

[0028] Phosphorylated zirconium oxide (ZrP) catalyst is mixed with 1mol / L zirconium oxychloride and ammonium dihydrogen phosphate aqueous solution at a volume ratio of 2:1, and the obtained precipitate is washed and filtered repeatedly, dried at 120°C for 10 hours, and then placed in Calcined at 400°C for 4h.

[0029]2) Preparation of solid base catalysts: alkaline earth oxides (MgO, CaO, SrO) and rare earth oxides (La 2 o 3 , CeO 2 ) respectively by the corresponding nitrate in N 2 Calcined under atmosphere for 8h.

[0030] Magnesium aluminum hydrotalcite is the mass of 0.093mol Mg(NO 3 ) 2 ·6H 2 O and 0.0465mol Al(NO 3 ) 3 9H 2 O is dissolved in 100ml of water, and the solution is mixed with 0.219mol NaOH and 0.0565mol NaOH in a water bath at 70°...

Embodiment 13

[0041] Sedimentation and precipitation method: Prepare 0.0175M nickel nitrate solution and divide it into two parts A and B in equal volume. Add silica, H-ZSM-5, H-MOR, silicon-aluminum composite carrier, H-β molecular sieve, oxidation One kind of aluminum and an appropriate amount of concentrated nitric acid, 0.0525M urea was added to B, B was slowly added dropwise to A in a water bath at 80°C, the temperature was raised to 90°C, stirred for 10 hours, filtered and washed, dried overnight at 80°C, and air roasted at 500°C for 2 hours. The calcined catalyst was reduced in situ with hydrogen at 500 °C for 2 h in a fixed bed. (see table 1, embodiment 14-18)

Embodiment 14-18

[0042] Table 1 Supported metal A / X type bifunctional catalyst

[0043]

[0044] 2 Self-condensation reaction: In a fixed-bed reactor, put 1.0g of catalyst into the reaction tube, keep the hydrogen pressure in the reactor at 0.6MPa, and the hydrogen flow rate at 150mL / min. Pump into the reactor at 0.05 mL / min. The reaction results are shown in Table 2 and Table 3.

[0045] Table 2 methyl isobutyl ketone self condensation reaction result

[0046]

[0047] It can be seen from Table 2 that the self-polymerization reaction activity of methyl isobutyl ketone is not ideal for the solid acid and basic catalyst without metal doping. When doping noble metals on acid or base catalysts (Examples 19-35), carbon-numbered dodecanones and alcohols can be generated. Among them, the activity is better when the magnesium aluminum hydrotalcite doped with Pd.

[0048] Table 3 Self-condensation reaction target product structural formula

[0049]

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Abstract

The invention relates to a preparation method for branched alkanes in a range of gasoline and aviation kerosene and biomass-based fatty alcohols. The method comprises the following two parts: (1) on afirst catalyst bed layer of a fixed-bed continuous reactor, methyl isobutyl ketone is subjected to a self-condensation reaction under catalysis of an acid catalyst, a base catalyst, a metal-doped solid acid catalyst, or a metal-doped solid base catalyst, so that an oxygen-containing organic compound with a carbon atom number of 12 is obtained; and (2) on a second catalyst bed layer of the fixed-bed continuous reactor, the generated product of the first catalyst bed layer and un-reacted raw materials are subjected to a one-step hydrodeoxygenation reaction under catalysis of a supported metal A/X-type bifunctional catalyst and conditions of a relatively high temperature and no solvents, and therefore the branched alkanes with carbon atom number of 6 and 12 in the range of the gasoline and the aviation kerosene are obtained. According to the invention, the saturated alcohols with a carbon atom number of 6 can be used as mineral flotation agents, and the saturated alcohols with a carbon atom number of 12 can be used for synthesis of biomass-based surfactants and the like.

Description

technical field [0001] The invention relates to a method for preparing branched alkanes and biomass-based fatty alcohols within the scope of gasoline and aviation kerosene, which specifically includes two steps: 1) in the first catalyst bed of a fixed-bed continuous reactor, a biomass platform The compound methyl isobutyl ketone is catalyzed by an acid catalyst, a base catalyst, a metal-doped solid acid catalyst or a metal-doped solid base catalyst, and undergoes a self-condensation reaction to obtain an oxygen-containing organic compound with a carbon number of 12; 2 ) On the second catalyst bed of the fixed-bed continuous reactor, the first catalyst bed generates product and unreacted raw materials under the catalysis of supported metal A / X type bifunctional catalyst: at higher temperature, solvent-free conditions Next, carry out a hydrodeoxygenation reaction to obtain branched chain alkanes within the range of carbon number 6 and 12 gasoline and aviation kerosene. The hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00C07C29/145C07C31/125
CPCC07C29/145C10G3/44C10G3/45C10G3/47C10G3/49C10G3/54C07C31/125Y02P30/20
Inventor 李宁盛雪茹张涛李广亿王爱琴王晓东丛昱
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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