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Method for grease to be decarbonylated into long-chain alkane under hydrogen-free condition

A technology for long-chain alkanes and conditions, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of high metal loading and low reaction efficiency, and achieve low equipment requirements and high operational safety , the effect of improving efficiency

Active Publication Date: 2018-09-28
上海科密思新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can be carried out in a nitrogen atmosphere at atmospheric pressure, and has high safety, but this method requires a relatively high metal loading (15-50%), the highest hydrocarbon yield is only 78%, and the reaction efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this example, glyceryl tristearate is used as a raw material, and Pt / Ca-Al-hydrotalcite is used as a decarbonylation catalyst.

[0025] Step 1, using the impregnation method to prepare the catalyst Pt / Ca-Al-hydrotalcite:

[0026] Pt precursor PtCl 4 Dissolving in water to make a metal solution, adding the calcium aluminum hydrotalcite powder into the metal solution, the total amount of metal accounts for 3% of the mass of the calcium aluminum hydrotalcite. The above mixture was stirred until dry, dried overnight at 80°C, and then ground into powder. The powder was calcined in air at a temperature of 350 degrees Celsius, and then reduced with hydrogen at the same temperature to obtain the catalyst Pt / Ca-Al-hydrotalcite.

[0027] In step 2, 0.2 g of the catalyst Pt / Ca—Al-hydrotalcite prepared in step 1 and 2 g of glyceryl tristearate were added to the reaction kettle, and 40 ml of dodecane was added as a solvent. After the reactor is sealed, first replace the air in...

Embodiment 2

[0031] In this example, methyl stearate was used as a raw material, and Pt / HAP was used as a decarbonylation catalyst.

[0032] Step 1, prepare catalyst Pt / HAP using ion exchange method:

[0033] A certain amount of Pt precursor PtCl 4 Dissolve in water and dilute to a certain concentration to make a Pt-based metal solution, add hydroxyapatite (HAP) into the Pt-based metal solution, stir at 80 degrees Celsius for 8-12 hours, and make a sample. After cooling the samples were filtered and dried overnight at 80°C. The dried sample was ground into powder, calcined in air at 350 °C, and then reduced with hydrogen at the same temperature to obtain the catalyst Pt / HAP.

[0034] In step 2, 0.5 g of the catalyst Pt / HAP prepared in step 1 and 10 g of methyl stearate were added into the reaction kettle, and then 40 ml of dodecane was added as a solvent. After the reactor is sealed, first replace the air in the reactor with nitrogen, and then fill it with 0.1MPa nitrogen. The reaction...

Embodiment 3

[0038] In this embodiment, palm oil is used as raw material, and Pt / Ca-Al 2 o 3 as a decarbonylation catalyst.

[0039] Step 1, prepare catalyst Pt / Ca-Al using ion exchange method 2 o 3 :

[0040] A certain amount of Pt precursor PtCl4 Dissolve in water and dilute to a certain concentration to make a Pt-based metal solution, and Ca-Al 2 o 3 Add it to the Pt-based metal solution, stir at 80 degrees Celsius for 8-12 hours, and make a sample. After cooling the samples were filtered and dried overnight at 80°C. The dried sample was ground into powder, calcined in air at 350°C, and then reduced with hydrogen at the same temperature to obtain the catalyst.

[0041] Step 2, the catalyst Pt / Ca-Al prepared by 0.5g step 1 2 o 3 And 5g palm oil is added in the reactor, then add 40ml dodecane as solvent. After the reactor is sealed, first replace the air in the reactor with nitrogen, and then fill it with 0.1MPa nitrogen. The reaction kettle was heated to 320 degrees Celsius an...

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Abstract

The invention relates to a method for grease to be decarbonylated into long-chain alkane under a hydrogen-free condition. One or more of long-chain fatty acid or / and fatty acid ester, animal and vegetable fats and oils, aqueous algal oil and waste cooking oil are used as raw materials, a carrier which contains Ca is loaded with Pt and used as a decarbonylation catalyst, carboxyls are removed though the decarbonylation, and thus the long-chain alkane is generated. The method is simple in process and high in operational safety, sources of the raw materials are wide, and the investment costs of devices and the raw materials are reduced. Green and reproducible grease is used as the raw material, and usage of fossil energy is avoided, so that the method accords with green and environmental-friendly concepts. A catalytic reaction is conducted under the hydrogen-free condition, and the carrier with Ca promotes adsorption and activation of grease molecules, so that the decarbonylation efficiency is greatly improved, and the aim of preparing the long-chain straight-chain alkane from the grease through the decarbonylation at a lower temperature under the hydrogen-free condition can be achieved.

Description

technical field [0001] The invention relates to the technical field of oil deoxygenation conversion, in particular to a method for decarbonylation of oil into long-chain alkanes under hydrogen-free conditions. Background technique [0002] Long-chain alkanes (C8-C20), as the main component of internal combustion engine fuel, are usually obtained by cracking fossil energy oil. Fossil energy is a non-renewable resource that will be exhausted one day as people exploit it. Fossil energy has the characteristics of regional distribution, and there is a situation that the demand area and the mineral deposit area do not overlap, and usually requires transportation. The mining, transportation and utilization of fossil resources will bring great pressure to the environment. Therefore, people have turned their attention to renewable biomass energy. [0003] Grease is formed by esterification of long-chain fatty acids (C8-C18) and mono- or tri-alcohols. It is widely found in animals an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/207C07C9/22B01J23/42B01J23/58
CPCB01J23/42B01J23/58C07C1/2078C07C9/22
Inventor 赵晨李愽龙
Owner 上海科密思新能源科技有限公司
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