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A new pulp and process for pulping

A technology of pulp and tetraalkylammonium salt, applied in the fields of lignocellulosic materials, pulping methods of lignocellulosic materials and softening of lignocellulosic materials, can solve the problems of low carbohydrate yield organic sulfur compounds, etc.

Inactive Publication Date: 2008-11-12
KEMIRA OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, chemical methods have two inherent problems, namely low carbohydrate yield and formation of huge organosulfur compounds

Method used

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  • A new pulp and process for pulping
  • A new pulp and process for pulping
  • A new pulp and process for pulping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Treat cork in 40% aqueous tetrabutylammonium hydroxide at 170 °C for 5 min in a microwave field

[0095] In a sealed reactor tube equipped with a magnetic stirring bar, about 750 mg of cork sticks were mixed in 4,5 ml of 40% tetrabutylammonium hydroxide in water and stirred at 170° C. for 5 minutes.

[0096] Stirring resulted in a dark brown solution containing long nits. Washing with water gave two separate bundles of light beige fibers as well as completely separated fibers.

Embodiment 2

[0098] Treat cork in 20% aqueous tetrabutylammonium hydroxide at 170°C for 5 minutes in a microwave field

[0099] In a sealed reactor tube equipped with a magnetic stirring bar, about 750 mg of cork sticks were mixed in 4,5 ml of 20% tetrabutylammonium hydroxide in water and stirred at 170° C. for 5 minutes.

[0100] Stirring resulted in a dark brown solution containing long nits. Washing with water gave two separate bundles of light beige fibers as well as completely separated fibers. The pulp composition is slightly more complete than Example 1.

Embodiment 3

[0102] Treat cork in 10% aqueous tetrabutylammonium hydroxide at 170°C for 5 minutes in a microwave field

[0103] In a sealed reactor tube equipped with a magnetic stirring bar, about 750 mg of a cork stick were mixed in 4,5 ml of a 10% aqueous solution of tetrabutylammonium hydroxide and stirred at 170° C. for 5 minutes.

[0104] Stirring resulted in a dark brown solution containing long nits. Washing with water gave two separate bundles of light beige fibers with a more complete pulp composition than Example 2.

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Abstract

The invention relates to a new pulp, which is derived from lignocellulosic material subjected for agitation in aqueous tetra-alkylammonium salt solution under microwave irradiation. The invention relates also to a process for pulping lignocellulosic material and to a process for softening lignocellulosic material. The treated material is preferably wood, softwood or hardwood.

Description

field of invention [0001] The present invention relates to novel pulps obtained from lignocellulosic materials under microwave irradiation with agitation in aqueous solutions of tetraalkylammonium salts. The invention also relates to a method of pulping lignocellulosic material and a method of softening lignocellulosic material. Background technique [0002] pulp [0003] Pulp is the raw material for the production of paper, cardboard, fiberboard and similar manufactured products. In its purified form it is a source of cellulose for rayon, cellulose, or other cellulose-derived products. [0004] Pulp is obtained from plant fibers, so it is a renewable resource. Fibrous plants have been used as a resource for writing materials, such as papyrus, since the earliest Babylonian and Egyptian civilizations. The origin of papermaking (which is rebonded from separated fibers to form a cohesive sheet) is attributed to Cai Lun in China in 105AD, using bamboo, mulberry bark, and rag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/00D21C
CPCD21C9/007D21C1/06
Inventor V·米吕迈基R·阿克塞拉
Owner KEMIRA OY