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Method for making paper by macroalgae

A seaweed, large-scale technology, applied in papermaking, textiles and papermaking, natural cellulose pulp/paper, etc., to achieve the effect of reducing papermaking costs, low prices, and abundant sources

Active Publication Date: 2012-07-18
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Can these salvaged large algae be developed and utilized to turn waste into treasure? Seaweed is undoubtedly a considerable amount of non-timber resources, but there is still no effective record of using seaweed for papermaking in my country

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The specific steps of the papermaking method are as follows:

[0032] (1) cleaning to remove impurities in Enteromorpha;

[0033] (2) Coarse grinding: drain the cleaned Enteromorpha, and grind it to a length of 2-4cm with a refiner;

[0034](3) Pretreatment: in parts by weight, 1 part of Enteromorpha glabra after rough grinding was treated with 20 parts of 4wt% sodium hydroxide solution at a temperature of 85° C. for 5 hours, then rinsed and pressure filtered;

[0035] (4) Bleaching: in parts by weight, 1 part of Enteromorpha after the treatment of step (3) was bleached in a 70°C water bath with 20 parts of 8wt% hydrogen peroxide solution for 4 hours, then cleaned, pressure filtered, and collected the remaining thing;

[0036] (5) Fine grinding: the Enteromorpha material after step (4) bleaching is ground to a length of 0.2-0.6cm with a refiner to obtain the Enteromorpha slurry;

[0037] (6) Mixing and dissolving: the mass percent is 70% slurry and 30% Enteromorpha m...

Embodiment 2

[0042] The specific steps of the papermaking method are as follows:

[0043] (1) cleaning to remove impurities in the Ulva;

[0044] (2) Coarse grinding: Drain the cleaned Ulva, and grind it to a length of 2-4cm with a refiner;

[0045] (3) Pretreatment: in parts by weight, 1 part of wet Ulva after rough grinding was treated with 30 parts of 6wt% sodium hydroxide solution at a temperature of 90° C. for 2.5 hours, then washed and pressure filtered;

[0046] (4) Bleaching: in parts by weight, 1 part of Ulva treated by step (3) was bleached for 6 hours in a 65°C water bath with 30 parts of 6wt% hydrogen peroxide solution, then cleaned, pressure filtered, and the remaining thing;

[0047] (5) Refining grinding: grinding the Ulva material after bleaching in step (4) to a length of 0.2-0.6 cm with a refiner to obtain Ulva slurry;

[0048] (6) Mixing and dispersing: the mass percentage is 50% slurry and 50% Ulva mixed and dispersing evenly;

[0049] (7) Sheet forming: the mixture...

Embodiment 3

[0053] The specific steps of the papermaking method are as follows:

[0054] (1) Wash the Enteromorpha and Ulva separately to remove impurities;

[0055] (2) Coarse grinding: Drain the cleaned Enteromorpha and Ulva, mix them together according to the ratio of 80% Enteromorpha and 20% Ulva, and grind the mixture to a length of 2-4cm with a refiner;

[0056] (3) Pretreatment: in parts by weight, 1 part of Enteromorpha and Ulva mixture after rough grinding is treated with 25 parts of 6wt% sodium hydroxide solution at a temperature of 80-90° C. for 1.5-2.5 hours, then rinsed, pressure filtration;

[0057] (4) Bleaching: in parts by weight, 1 part of Enteromorpha and Ulva mixture processed through step (3) was bleached for 5 hours in a 55°C water bath with 25 parts of 5wt% hydrogen peroxide solution, then cleaned and pressured Filter to collect the solids separately;

[0058] (5) fine grinding: the mixture of Enteromorpha and Ulva after bleaching in step (4) is ground to a lengt...

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Abstract

The invention relates to a method for making paper, in particular to a method for making paper by macroalgae. In the invention, paper or a paper product is formed by mixing the macroalgae and paper-making pulp. By utilizing the method of the invention, the part or the whole of the macroalgae can replace traditional paper-making raw materials, so that a novel paper product can be obtained; and the macroalgae has rich resources and low cost, so when the macroalgae is used for paper making, the required processing is simple, further, the paper-making cost is effectively reduced, and the problem that the macroalgae is difficult to process is solved. The method disclosed by the invention is beneficial to environmental protection.

Description

technical field [0001] The invention relates to a method for making pulp and paper, in particular to a method for making paper by using large algae. Background technique [0002] The consumption level of paper and cardboard is an important symbol to measure a country's modernization level and civilization construction. The paper industry is an important basic raw material industry that is closely related to the development of the national economy and the construction of social civilization. Its role in the modern economy has attracted more and more attention from the world, and it is recognized internationally as an "inexhaustible" industry. The development level of the paper industry directly reflects the development level of a country's national economy and civilization construction. In economically developed countries such as the United States, Canada, Japan, Finland, and Sweden, the paper industry has become one of the pillar manufacturing industries of their national ec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/00
Inventor 王广策林阿朋裴继诚朱大玲李健张方东
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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