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Method for preparing hydrocarbon fuel and methanol

A technology of hydrocarbon fuel and methanol, which is applied in the field of producing hydrocarbon fuel and methanol by using lignin, which can solve the problems of ineffective utilization of lignin, waste of lignin resources, environmental pollution, etc., and achieve high raw material utilization and yield High effect with broad application prospects

Inactive Publication Date: 2008-07-23
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, lignin has not been effectively utilized. In addition to a large amount of lignin resources being wasted, humans also produce a large amount of lignin as waste (such as a large amount of alkali lignin waste discharged from paper mills) while utilizing cellulose. liquid), causing serious environmental pollution

Method used

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  • Method for preparing hydrocarbon fuel and methanol
  • Method for preparing hydrocarbon fuel and methanol
  • Method for preparing hydrocarbon fuel and methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, directly use wood flour as raw material to prepare hydrocarbon fuel and methanol

[0023] In this embodiment, the wood powder rich in lignin is directly used as raw material to prepare hydrocarbon fuel and methanol through a two-step catalytic hydrogenation reaction. - 30 mL of ethanol solution was extracted with a Soxhlet extractor for 48 hours. After drying in the air, add 75 mL of 1,4-dioxane-water solution (lignin solvent) and 0.5 g of 5% Rh / C catalyst (purchased from Baoji Botong Nonferrous Metals Co., Ltd.) mixed at a ratio of 1:1 to high pressure In the kettle (the pH value of the reaction system is about 7), then fill it with hydrogen to 40bar at room temperature, then raise the temperature to 200°C, stir at a speed of 500rpm, and react for 5 hours; after the first step of the catalytic hydrogenation reaction, filter the reaction solution , the filtrate was extracted 3 times with cyclohexane, the extracts were combined, the cyclohexane was distill...

Embodiment 2

[0024] Embodiment 2, using organic lignin as raw material to prepare hydrocarbon fuel and methanol

[0025] In this example, organic lignin (purchased from Aldrich Company) was used as raw material to prepare hydrocarbon fuel and methanol through a one-step catalytic hydrogenation reaction. The specific method was: take 1g of organic lignin, add 30mL of sulfuric acid aqueous solution of pH2 and 0.1g of 5% Pd / C catalyst, filled with hydrogen to 30bar at normal temperature, raised the temperature to 250°C within 1 hour, and reacted for 2 hours. C 8 (Ethylcyclohexane), C 9 (Propylcyclohexane) and C 14 -C 18 The yield of naphthenic derivatives is about 10% of the raw material, and there is a large amount of methanol in the lower aqueous phase, and the yield accounts for more than 60% of the methoxyl content of the raw material lignin. At the same time, the gas in the autoclave after the reaction was detected by IR, and the result contained a small amount of CO 2 、CH 4 gas, a...

Embodiment 3

[0026] Example 3. Preparation of hydrocarbon fuel and methanol with lignin dimer 1-benzyloxy-2-methoxy-4-propyl-benzene as raw material

[0027] (Formula III)

[0028] Using lignin dimer 1-benzyloxy-2-methoxy-4propyl-benzene (molecular formula see formula III) as raw material, prepare hydrocarbon fuel and methanol through one-step catalytic hydrogenation reaction, the specific method is: take Add 1 gram of raw material whose molecular formula is formula III, add 30mL of 1% phosphoric acid aqueous solution and 0.1g of 5% Pd / C catalyst (purchased from Baoji Botong Nonferrous Metals Co., Ltd.), and fill with hydrogen to 80bar at room temperature for 1 hour Internally raise the temperature to 250°C and react for 0.2 hours. After the reaction is completed, the temperature is lowered, and the product is divided into two phases, and the upper oil phase product contains C 7 (Methylcyclohexane), C 9 (Propylcyclohexane) Hydrocarbons, C 7 Yield reaches 75% of raw material, C 9 The yi...

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Abstract

The invention discloses a preparation method for hydrocarbon fuel and methanol, which is characterized in that a wood powder, a lignin, a lignin monomer and (or) a lignin monomer and / or dimer is used as a raw material, the raw material and a hydrogenation catalyst are filled into a high-pressure autoclave, the pH value of an aqueous phase reaction system is adjusted to 2 to 7, hydrogen is charged into the reaction system under the normal temperature, and the temperature is increased to 40 to 350 degree centigrade, the reaction is executed for 0.2 to 5 hours under 40 to 350 degree centigrade, and the product is divided into two phases after the reaction is completed and the temperature is decreased, the upper layer phase is the hydrocarbon fuel, the lower layer aqueous phase is a methanol solution; the molar ratio of the hydrogenation catalyst and the raw material is 1:10-10000. Compared to the traditional prepared hydrocarbon fuel and methanol, the preparation method for hydrocarbon fuel and methanol has the advantages of economy with wide resources of the raw material and low cost, environment protection, simplicity with simple process, high efficiency with high utilization ratio of the raw material and high productivity, which takes an important role in the utilization of the lignin, hydrocarbon fuel and methanol preparation field with a wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing hydrocarbon fuel and methanol, in particular to a method for preparing hydrocarbon fuel (especially gasoline and diesel oil) and methanol by using lignin. Background technique [0002] Lignin, cellulose and hemicellulose are the main components of the plant skeleton. Among them, the molecular structure of lignin is based on phenylpropane derivatives, and the units rely on carbon-oxygen bonds (C-O-C) or carbon-carbon bonds (C-C ) connected to form a polymer with a three-dimensional structure, the molecular weight of the isolated lignin is generally several thousand to tens of thousands of Da, and the original lignin can reach hundreds of thousands. So far, lignin has not been effectively utilized. In addition to a large amount of lignin resources being wasted, humans also produce a large amount of lignin as waste (such as a large amount of alkali lignin waste discharged from paper mills) while utilizing ce...

Claims

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Application Information

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IPC IPC(8): C10G1/06C10L1/04C07C31/04
Inventor 寇元颜宁赵晨刘凌涛王晨
Owner PEKING UNIV
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