Method for stalk liquefaction preprocessing to prepare fuel ethyl hydrate raw material

A technology of fuel ethanol and pretreatment, which is applied in fiber raw material treatment, textiles and papermaking, etc., to achieve the effects of avoiding environmental pollution, saving energy consumption and realizing comprehensive utilization

Inactive Publication Date: 2008-11-05
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using "liquefaction technology" to pretreat straw to prepare raw

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 10g of straw and 25g of resorcinol into a 250ml three-neck flask, install a stirrer and a reflux condensing device, place it in a water bath or an oil bath at 90°C, stir and preheat for 10min, add dropwise 70% sulfuric acid catalyst 0.5 ml, reacted for 75min, after the reaction was completed, the product was washed with ethanol to remove the low-viscosity solution-like substance, and then neutralized to neutral with 25% sodium hydroxide ethanol solution, then filtered, and the filter cake was dried to determine its cellulose content.

[0021] Product appearance after "liquefaction": dark brown solid

[0022] Implementation example effect:

[0023] Cellulose content in "liquefied" product: 67.70%

[0024] Lignin content in "liquefied" products: 4.10%

Embodiment 2

[0026] Put 10g of straw and 35g of polyethylene glycol-600 into a 250ml three-neck flask, install a stirrer and a reflux condensing device, place it in a water bath or an oil bath at 93°C, stir and preheat for 10min, and add 35% hydrochloric acid dropwise Catalyst 2ml, reacted for 60min, the reaction product was washed with acetone, neutralized with 15% calcium hydroxide acetone solution, filtered, dried, and its cellulose content was measured. Appearance of "liquefied" product: Pale yellow solid

[0027] Implementation example effect:

[0028] Cellulose content in "liquefied" product: 66.20%

[0029] Lignin content in "liquefied" product: 5.47%

Embodiment 3

[0031] Put 10g of straw and 20g of hydroquinone into a 250ml three-neck flask, install a stirrer and a reflux condensing device, place it in a water bath or an oil bath at 103°C, stir and preheat for 10min, and add dropwise 60% phosphoric acid catalyst 0.6 ml, reacted for 76 minutes, the reaction product was washed, neutralized, filtered, dried, and its cellulose content was determined.

[0032] Appearance of "liquefied" product: Pale yellow solid

[0033] Implementation example effect:

[0034] Cellulose content in "liquefied" product: 68.31%

[0035] Lignin content in "liquefied" products: 4.30%

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PUM

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Abstract

The invention relates to a pre-treatment method for straw 'liquefying' to provide material for fuel alcohol preparation. The method adopts powders (10.0 parts of mass) of crop straws and phenols or polyalcohol compound (10 to 100 parts of mass) which is firstly pre-heated by 10 to 30 minutes under a temperature of 30 to 200 DEG C with the effect of acid catalyst (0.5 to 10 parts of mass) for a reaction of 30 to 240 minutes; after the reaction, the compound is washed, neutralized, filtered and dried to obtain a solid appearing as a color from citron yellow, yellow, bight brown to seal brown; wherein, the solid includes 64.0 to 70,0 percent of fibrin and 4.1 to 7.6 percent of lignin. The method adopts the 'liquefying' process to carry out pre-treatment to fibrin biomass of straws with high straw fibrin content and low granularity after pre-treatment to realize effective separation of fibrin and lignin, etc. so as to provide the better material for preparing fuel alcohol with straws and to conserve energy cost and avoid contamination to environment.

Description

technical field [0001] The invention belongs to the field of preparing fuel ethanol raw materials based on straw-like cellulose biomass, and in particular relates to a process method for preparing fuel ethanol raw materials from straws using "liquefaction" technology. Background technique [0002] With the industrialization of more and more countries and the rapid increase of population, the problem of energy shortage has become more and more serious. Crude oil, as the main energy, has a huge demand. The world's crude oil production has dropped sharply, and the price of crude oil has exceeded 100 US dollars per barrel. The energy crisis is imminent. Biomass energy-ethanol is a clean energy with broad development potential. Since the 1980s in my country, grain production has increased substantially, and the amount of straw has also increased. In addition, the promotion of firewood-saving and coal-saving technologies, the popularization of coal burning and the use of "liquefi...

Claims

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Application Information

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IPC IPC(8): D21C5/00
Inventor 张玉苍孙岩峰何连芳李阳
Owner HAINAN UNIVERSITY
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