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Method for preparing renewable dodecanol and branched alkanes in an aviation kerosene range

A technology for aviation kerosene and branched-chain alkane, which is applied in the field of preparation of branched-chain alkanes in the range of renewable dodecanol and aviation kerosene, can solve the problem of high cost

Inactive Publication Date: 2018-06-22
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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  • Method for preparing renewable dodecanol and branched alkanes in an aviation kerosene range
  • Method for preparing renewable dodecanol and branched alkanes in an aviation kerosene range
  • Method for preparing renewable dodecanol and branched alkanes in an aviation kerosene range

Examples

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 (La 2 o 3 , CeO 2 ) respectively by the corresponding nitrate in N 2 Calcined under atmosphere for 8h.

[0032] 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

[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, Examples 14-16, 16A, 16B)

[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 r...

Embodiment 36-41

[0055] Taking palladium-doped magnesium aluminum hydrotalcite (Pd-MgAl-HT) as an example, the optimization of reaction conditions was explored.

[0056] 1) The effect of palladium / magnesium molar ratio on the yield of propylidene acetone self-condensation reaction

[0057] The influence of table 4 catalyst mass fraction on product yield

[0058]

[0059]

[0060] As can be seen from Table 4, when the palladium / magnesium mol ratio is 0.02, the total product yield is the highest.

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Abstract

The present invention relates to a method for preparing biomass-based dodecanol and branched alkanes in an aviation kerosene range. The preparation method is divided into the following two parts that1) in the first catalyst bed layer of a fixed bed continuous reactor, isopropylideneacetone, diacetone alcohol, methyl isobutyl methanol or the mixture comprising two or more two compounds selected from isopropylideneacetone, diacetone alcohol and methyl isobutyl methanol is subjected to a condensation reaction under the catalysis of an acid catalyst, an alkali catalyst, a metal-doped solid acid catalyst or a metal-doped solid alkali catalyst to obtain oxygen-containing organic compounds having a carbon chain length of 12; and 2) in the second catalyst bed layer of the fixed bed continuous reactor, the condensation product generated in the first catalyst bed layer and unreacted hydrogen are subjected to a hydrogenation reaction at a low reaction temperature under the promotion of a metal catalyst to obtain dodecanol.

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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IPC IPC(8): C07C31/125C07C29/145C07C9/16C07C1/20
CPCC07C1/2076C07C29/145C07C45/72C07C2523/42C07C2523/44C07C2523/72C07C2523/745C07C2523/755C07C2529/46C07C2529/76C07C31/125C07C9/16C07C49/04
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