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Preparation method of reproducible dodecanol and branched paraffin in range of aviation kerosene

A technology of aviation kerosene and branched alkanes, which is applied in the preparation of liquid hydrocarbon mixtures, chemical instruments and methods, and the preparation of organic compounds, and can solve the problem of high cost

Active Publication Date: 2018-06-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Separation of the catalyst and rectification of the product, the cost is high

Method used

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  • Preparation method of reproducible dodecanol and branched paraffin in range of aviation kerosene
  • Preparation method of reproducible dodecanol and branched paraffin in range of aviation kerosene
  • Preparation method of reproducible dodecanol and branched paraffin in range of aviation kerosene

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Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0028] 1. Preparation of catalyst:

[0029] 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.

[0030] 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.

[0031] 2) Preparation of solid base catalysts: Alkaline earth oxides (MgO, CaO, SrO) and rare earth oxides (La2O3, CeO2) were obtained by calcining the corresponding nitrates under N2 atmosphere for 8h, respectively.

[0032] Magnesium-aluminum hydrotalcite is to dissolve 0.093mol Mg(NO3)2·6H2O and 0.0465molAl(NO3)3·9H2O in 100ml of water, add 0.219mol NaOH and 0.0565mol Na2CO3 to the solution in a water bath at 70°C in 100ml of aqueous solution dropw...

Embodiment 13

[0043] 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

[0044] Table 1 Supported metal A / X type bifunctional catalyst

[0045]

[0046]

[0047] 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. mL / min was pumped into the reactor. The reaction results are shown in Table 2 and Table 3.

[0048] Table 2 Propylene oxide self-condensation reaction result

[0049]

[0050] As can be seen from Table 2, solid acid and basic catalysts without metal doping are not ideal for the self-polymerization reaction of propylene glycol. When doping noble metals on acid or base catalysts (Example 19-35), dodecyl ketones and alcohols can be generated. Among them, the activity is better when the magnesium aluminum hydrotalcite doped with Pd.

[0051] Table 3 Self-condensation reaction target product structural formula

[0052]

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Abstract

The invention relates to a preparation method of biomass-based dodecanol and branched paraffin in a range of aviation kerosene. The preparation method comprises two parts: 1), mesityl oxide, diacetonealcohol and methyl isobutyl carbinol or a mixture of two or more of the compounds is subjected to a condensation reaction on a first catalyst bed layer of a fixed bed continuous reactor under catalysis of an acid catalyst, a base catalyst, a metal doped solid acid catalyst or a metal doped solid base catalyst, and an oxygen-containing organic compound with carbon chain length being 12 is obtained; 2), a condensation product produced on the first catalyst bed layer and unreacted hydrogen are subjected to a hydrogenation reaction on a second catalyst bed layer of the fixed bed continuous reactor at lower reaction temperature under the acceleration of a metal catalyst, and dodecanol is obtained.

Description

technical field [0001] The present invention relates to a kind of preparation method of branched alkanes within the range of renewable dodecanol and aviation kerosene, which specifically comprises two steps: 1) in the first catalyst bed layer of fixed bed continuous reactor, lignocellulosic biomass platform Compound mesityl oxide, diacetone alcohol, methyl isobutyl carbinol or a mixture of two or more of these compounds with hydrogen in an acid catalyst, base catalyst, metal-doped solid acid catalyst or metal-doped Under the promotion of a solid base catalyst, an oxygen-containing organic compound with a carbon chain length of 12 is obtained through a condensation reaction; 2) On the second catalyst bed of the fixed-bed continuous reactor, the first catalyst bed generates a carbon chain length of 12 The oxygenated organic compounds can be hydrogenated or hydrodeoxygenated under the promotion of supported metal A / X type bifunctional catalysts to obtain renewable dodecanol or br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00C07C29/145C07C31/125
CPCC07C29/145C10G3/54C10G2300/202C07C31/125Y02P30/20
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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