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Method for producing biomass polyalcohol with plants stalk liquescence

A technology for biomass polyol and plant straw, which is applied in the field of liquefying plant straw to prepare biomass polyol, can solve the problems of unsatisfactory liquefaction effect, difficult access of liquefaction reagents, damage to tissue structure, etc., and achieves reduction of liquefaction conditions and improvement of liquefaction effect. , the effect of simple operation

Inactive Publication Date: 2008-05-07
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new plant straw liquefaction method in order to solve the problems of tight plant tissue structure, difficult access of liquefaction reagent and unsatisfactory liquefaction effect in the liquefaction of plant straw, which destroys the tissue structure through steam explosion treatment , in order to achieve the purpose of improving the liquefaction effect

Method used

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  • Method for producing biomass polyalcohol with plants stalk liquescence
  • Method for producing biomass polyalcohol with plants stalk liquescence
  • Method for producing biomass polyalcohol with plants stalk liquescence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Spray water on the sawdust, the amount of water spray is 30%, put the evenly mixed wet material into the steam explosion tank from the feed port, close the steam explosion tank, feed steam from the steam pipeline, observe the pressure gauge, when the pressure is Stop feeding steam at 1.7MPa, and after maintaining the pressure for 4 minutes, close the steam pipeline, open the discharge nozzle valve, and instantly burst the material in the tank, and dry it to obtain steam-exploded sawdust;

[0025] Put the steam-exploded wood chips into a reaction tank, add polyethylene glycol and sulfuric acid to make the liquid-solid mass ratio 5:1, and stir and react for 2 hours at a temperature of 130°C to obtain steam-exploded wood chips. Liquefaction product - biomass polyol;

[0026] The added sulfuric acid is concentrated sulfuric acid, and its add-on is the % of polyhydric alcohol adding weight;

[0027] Its liquefaction effect is expressed by the residue rate, from figure 1 It...

Embodiment 2

[0029] Spray water on wheat (or rice straw) stalks, the amount of water spray is 30%, put the evenly mixed wet material into the steam explosion tank from the feed port, close the steam explosion tank, feed steam from the steam pipeline, and observe Pressure gauge, when the pressure is 1.6MPa, stop feeding steam. After maintaining the pressure for 4 minutes, close the steam pipeline, open the outlet valve, and instantly burst the material in the tank, and dry the steam-exploded wheat (or straw) ) Straw material.

[0030] The steam-exploded wheat (rice straw) stalk material that has been steam-exploded is put into a reaction tank, and ethylene glycol and sulfuric acid are added so that the liquid-solid mass ratio is 2:1 (or 3:1). At a temperature of 110°C, Stirring and reacting for 1 hour, the steam-exploded wheat (rice straw) stalk liquefaction product-biomass polyol was obtained;

[0031] The added sulfuric acid is concentrated sulfuric acid, and its add-on is 3% of polyhydr...

Embodiment 3

[0034] Spray water on corn (or sorghum) stalks, the amount of water spray is 30%, put the evenly mixed wet material into the steam explosion tank from the feed port, close the steam explosion tank, feed steam from the steam pipeline, and observe the pressure When the pressure is 1.65MPa, stop feeding steam. After maintaining the pressure for 4 minutes, close the steam pipeline, open the outlet valve, and instantly burst the material in the tank, and dry it to obtain steam-exploded corn (or sorghum). Straw material.

[0035] The steam-exploded corn (or sorghum) straw material is directly used for liquefaction,

[0036] Put the steam-exploded corn (or sorghum) straw material into the reaction tank, add polyethylene glycol and sulfuric acid to make the liquid-solid mass ratio 4:1, and stir for 1.5 hours at a temperature of 120°C , to obtain steam-exploded corn (or sorghum) stalk liquefaction product-biomass polyol;

[0037] The added sulfuric acid is concentrated sulfuric acid,...

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Abstract

The invention relates to a method for preparing biological polyalcohol by liquefying plant stalks. The method comprises the steps as follow: polyalcohol and sulphuric acid are added into the steam explosive plant stalk materials which are processed through steam blasting, and the plant stalk liquefying product of biological polyalcohol is obtained through liquefying reaction for 1 to 2 hours at the temperature of 110 to 130 DEG C; the rate of the total quantity of polyalcohol and sulphuric acid and the liquid and solid quantity of the plant steam explosive type plant stalk materials is 2: 1 to 5: 1; and the sulphuric acid added into is concentrated into sulphuric acid, and the quantity of the concentrated sulphuric acid is 1 to 3 percent of the weight of polyhydroxyalcohol. The invention damages the structure through a steam explosive pre-processing process, so that the liquefying agent can enter into easily, thereby decreasing the liquefying condition and increasing the liquefying efficiency. Besides, the invention has the advantages of low device investment, simple operation and obvious effect.

Description

technical field [0001] The invention belongs to a biomass preparation method, in particular to a method for preparing biomass polyols by liquefying plant straws, which can improve the liquefaction effect of plant straws under mild conditions. technical background [0002] With the continuous growth of population and the development of industrialization, the world is facing problems such as population growth, resource scarcity, and environmental pollution. The chemical industry, in particular, relies too much on non-renewable resources such as petroleum, coal and natural gas, but these resources are non-renewable and are facing the danger of exhaustion. In my country, in addition to coal resources that can still be exploited for 200 years, petroleum can only be exploited for 40 years, and natural gas can only be exploited for 60 years. Therefore, it is urgent to develop renewable sources of chemical raw materials. [0003] Biomass resources are inexhaustible and inexhaustibl...

Claims

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Application Information

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IPC IPC(8): C07C29/09
Inventor 陈洪章王麾
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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