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Peanut hull liquefaction and method for preparing adhesive thereof

A peanut shell and adhesive technology, applied in the directions of adhesives, adhesive types, aldehyde/ketone condensation polymer adhesives, etc., can solve the problems of complex process, solvent recycling pollution, low utilization value, etc., and achieve stable storage and production. The effect of low cost and improved utilization value

Inactive Publication Date: 2008-04-09
北京光纪国际生物科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Using peanut shells to produce wood adhesives is an important way to efficiently utilize peanut shells. There are two main technical routes currently being studied: one is to use peanut shells as fillers for adhesives to partially improve some defects of adhesives, and the use value is not high. The second is to extract the adhesive through solvent extraction, and then react the peanut shell extract with other chemical reagents to prepare the adhesive. The process is complicated, the solvent needs to be recovered, and the extraction residue causes pollution, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 200g of molten phenol into the reactor, heat up to 50°C, add 200g of peanut shell powder, stir evenly, add 100g of concentrated hydrochloric acid, heat up to 130°C, react for 1h, cool down to below 100°C, add neutralizing caustic soda solution (concentration 40%) 100g, the temperature drops below 50°C, add 170g of caustic soda solution (concentration 40%), stir for 20min, add formaldehyde solution (concentration 37%) 400g, slowly heat up to 90°C, react for 60min, measure the viscosity, when the viscosity reaches 40s (Coat -4 cups / 25°C), cool down to below 40°C, and discharge.

[0015] The adhesive prepared under the above conditions is a brown viscous opaque liquid with a solid content of 43.4%, a pH value of 11.4, and a storage period of not less than 20 days.

[0016] Poplar plywood made of this adhesive (veneer thickness 2.0mm, glue amount 350g / m 2 (double-sided), unit pressure 1.3MPa, hot-pressing temperature 140°C, hot-pressing time 1min / mm), boiled in boiling...

Embodiment 2

[0018] Add 150g of molten phenol into the reactor, heat up to 50°C, add 350g of peanut shell powder, add 200g of ethanol, stir well, add 135g of concentrated hydrochloric acid, heat up to 140°C, react for 1h, cool down to below 100°C, add neutralization Caustic soda solution (concentration 40%) 135g, temperature drops below 50 ℃, add caustic soda solution (concentration 40%) 200g, stir for 20min, add formaldehyde solution (concentration 37%) 520g, slowly heat up to 90 ℃, react for 60min, measure viscosity, When the viscosity reaches 40s (coating -4 cups / 25°C), cool down to below 40°C and discharge.

[0019] The solid content of the adhesive prepared under the above conditions is 38.5%, the pH value is 10.86, and the storage period is not less than 20 days.

[0020] Poplar plywood made of this adhesive (veneer thickness 2.0mm, glue amount 350g / m 2 (double-sided), unit pressure 1.3MPa, hot-pressing temperature 140°C, hot-pressing time 1min / mm), boiled in boiling water for 4 hou...

Embodiment 3

[0022] Add 200g of molten phenol into the reactor, heat up to 50°C, add 300g of peanut shell powder, stir evenly, add 160g of concentrated hydrochloric acid, heat up to 130°C, react for 1h, cool down to below 100°C, add neutralizing caustic soda solution (concentration 40%) 160g, the temperature drops below 50°C, add 200g caustic soda solution (concentration 40%), stir for 20min, add formaldehyde solution (concentration 37%) 520g, slowly heat up to 90°C, react for 60min, measure the viscosity, when the viscosity reaches 40s (Coat -4 cups / 25°C), cool down to below 40°C, and discharge.

[0023] The solid content of the adhesive prepared under the above conditions is 45.3%, the pH value is 10.9, and the storage period is not less than 20 days.

[0024] Poplar plywood made of this adhesive (veneer thickness 2.0mm, glue amount 350g / m 2 (double-sided), unit pressure 1.3MPa, hot-pressing temperature 140°C, hot-pressing time 1min / mm), boiled in boiling water for 4 hours, dried at 63±...

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Abstract

The invention relates to a preparation method of peanut shell liquefaction and an adhesive of the peanut shell. The processing steps are that: (1) the mud and dirt on the surface of peanut shells are cleaned. Then the peanut shell is dried and crushed down; (2) the peanut shell powder is mixed well with molten phenol. Then inorganic mild or strong acid is added to react with the mixture under 120-160 DEG C for 0.5-3 hours. Soda solution is added to regulate the ph value of the mixed solution to be neutral. Next the temperature is reduced to 40-50 DEG C and the peanut shell phenol liquefaction product is obtained; (3) the soda solution and formaldehyde are added into the peanut shell phenol liquefaction product sequentially in proportion. Then the temperature rises to 80-95 DEG C. The reaction lasts for 30-90 minutes. Next the wooden adhesive for veneer used outside is obtained after being cooled below 40 DEG C. The invention has the advantages that the method of the wooden adhesive for veneer used outside can save lots of phenol of petrochemical materials. The adhesive has low cost, little poison, and stable storage. The adhesive has equal pre-compressed effect and gluing property with common phenolic resin and can remarkably increase the utilization value of the peanut shell.

Description

technical field [0001] The invention relates to a preparation method of peanut shell liquefaction and adhesive. The invention belongs to the technical fields of deep processing of agricultural by-products and wood adhesives. Background technique [0002] Using peanut shells to produce wood adhesives is an important way to efficiently utilize peanut shells. There are two main technical routes currently being studied: one is to use peanut shells as fillers for adhesives to partially improve some defects of adhesives, and the use value is not high. The second is to extract the adhesive through solvent extraction, and then react the peanut shell extract with other chemical reagents to prepare the adhesive. The process is complicated, the solvent needs to be recovered, and the extraction residue causes pollution. Contents of the invention [0003] The object of the present invention aims at overcoming the defective existing in the prior art, proposes a kind of method with pean...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/14
Inventor 孙丰文张茜
Owner 北京光纪国际生物科技服务有限公司
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