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Method for synthesizing biomass-based polyurethane foam material by using papermaking waste liquor extract

A technology for polyurethane foam and biomass raw materials, applied in the chemical industry, can solve the problems of ineffective treatment of pulping black liquor and environmental pollution, and achieve the effects of significant environmental protection value, reducing environmental pollution and avoiding environmental damage.

Inactive Publication Date: 2011-09-07
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the paper industry, many kinds of grasses are used as raw materials. The pulping process adopts the alkaline method. If the pulping black liquor cannot be effectively treated, it will cause serious environmental pollution if it is discharged directly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Get 50 parts of crushed corn cobs (dried at 105°C and crushed through a 20 mesh sieve), according to the following mass ratio:

[0041] Polyethylene Glycol-400 160 parts

[0042] Glycerol 40 parts

[0043] 7 parts concentrated sulfuric acid

[0044] Time 150min

[0045] Temperature 130°C

[0046] Put the three-neck flask containing the mixed liquefaction agent and catalyst into an oil bath and heat it. When the mixed liquid in the bottle reaches the predetermined temperature, add crushed corncobs and stir continuously with a stirrer. When the reaction reached the predetermined time, the three-necked flask was taken out from the oil bath and rapidly cooled to room temperature.

[0047] Take 60 parts of corn cob liquefaction products, and synthesize polyurethane foam according to the following mass ratio:

[0048] A component:

[0049] 60 parts of liquefied product of corn cob

[0050] 3 parts lignosulfonate

[0051] 0.6 parts of triethylamine

[0052] Dibutyltin d...

Embodiment 2

[0060] Take 50 parts of crushed corn stalks (dried at 105°C and crushed through 80 sieves), and liquefy the corn stalks according to the following mass ratio:

[0061] Polyethylene glycol-400 125 parts

[0062] Glycerol 25 parts

[0063] Concentrated sulfuric acid 5 parts

[0064] Time 180min

[0065] Temperature 180°C

[0066] See implementation example 1 for the raw materials used and the liquefaction process.

[0067] Take 60 parts of corn stalk liquefaction products, and synthesize polyurethane foam according to the following mass ratio:

[0068] A component:

[0069] 60 parts of liquefied product of corn stalks

[0070] 6 parts lignosulfonate

[0071] 0.9 parts of triethylamine

[0072] Dibutyltin dilaurate 0.6 parts

[0073] 0.6 parts of methyl silicone oil

[0074] B component:

[0075] Polymethylene polyphenyl polyisocyanate (PAPI) 72 parts

[0076] Mix components A and B in a mixing container, stir at 14000 rpm at 30°C for 10s, then pour into a mold, foam ...

Embodiment 3

[0079] Take 50 parts of crushed rice straw (dried at 105°C and crushed through a 40-mesh sieve), and liquefy the rice straw according to the following mass ratio:

[0080] Polyethylene glycol-400 210 parts

[0081] Glycerol 35 parts

[0082] 10 parts concentrated sulfuric acid

[0083] Time 30min

[0084] Temperature 160°C

[0085] See implementation example 1 for the raw materials used and the liquefaction process.

[0086] Take 60 parts of rice straw liquefaction products, and synthesize polyurethane foam according to the following mass ratio:

[0087] A component:

[0088] Liquefaction product of rice straw 60 parts

[0089] Lignosulfonate 10 parts

[0090] 1.9 parts of triethylamine

[0091] Dibutyltin dilaurate 1.9 parts

[0092] 1.8 parts of methyl silicone oil

[0093] B component:

[0094] Polymethylene polyphenyl polyisocyanate (PAPI) 90 parts

[0095] Mix components A and B in a stirring container, stir at 8000 rpm at 20°C for 20s, then pour into a mold, ...

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Abstract

The invention relates to a method for preparing a polyurethane foam material from biomass waste and papermaking black liquor extract serving as main raw materials. The low-cost and readily available biomass waste is taken as the raw material, the liquefaction product of the biomass waste is used for completely replacing polymer polyol, and waste produced in agricultural production is fully utilized; in addition, lignosulfonate is extracted from papermaking black liquor and added into biomass degradation liquor, a method for properly treating the papermaking black liquor is found while raw material cost is reduced, and the prepared polyurethane foam material has high degradation property due to the addition of a biomass component, and cannot pollute environment after being used. The waste in the agricultural production and the papermaking industry is effectively utilized, the raw material cost is greatly reduced, a new way is found for increasing the value of the waste produced in the agricultural production and the papermaking industry, inexhaustible plant resources can be fully utilized, and a road is opened up for recycling plants.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for synthesizing biomass-based polyurethane foam material by using papermaking waste liquid extract. Background technique [0002] Among all kinds of polyurethane products, polyurethane foam is the most important part. Its main feature is porosity, so its relative density is small and its specific strength is high. Polyurethane foam has excellent physical and mechanical properties, acoustic properties, electrical properties and chemical resistance, and its density, softness and hardness can be changed with different raw materials and formulas. It can be directly processed into polymer foam from monomer raw materials at one time, eliminating the need for intermediate processes such as polymerization, separation, refining, extrusion and granulation. When synthesizing polyurethane, the chemical structure, specifications, and varieties of polyols and isocyanates c...

Claims

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Application Information

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IPC IPC(8): C08G18/64C08H8/00C08H6/00C08J9/08C08J9/14C08G101/00C08H7/00
Inventor 李栋相姝楠汪立君周宇光吴敏
Owner CHINA AGRI UNIV
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