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Technology for preparing paper pulp and coproducing biochar from lignocellulose biomass

A technology of cellulose and biomass raw materials, applied in the direction of biofuel, pulp bleaching, pulping with organic solvents, etc., can solve the problems of inapplicability, achieve the effects of reducing damage, good water filtration performance, and intensifying degradation and dissolution

Active Publication Date: 2013-05-08
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the process is not suitable for the preparation of pulp

Method used

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  • Technology for preparing paper pulp and coproducing biochar from lignocellulose biomass

Examples

Experimental program
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Effect test

Embodiment 1

[0048] In this embodiment, the reeds are first crushed to a particle size of 2 cm to 10 cm. The present embodiment extracts the technology of pulp from described reed, comprises the steps:

[0049] (1) After the reeds are crushed and pretreated, the treated reeds are cooked with an organic acid solution of formic acid and acetic acid with a total acid concentration of 75%. The mass ratio of acetic acid to formic acid in the organic acid solution of this embodiment is 1: 1, and before adding the reed raw material, add 3% hydrogen peroxide (H 2 o 2 ) as a catalyst, control the reaction temperature at 125°C, react for 30 minutes, and have a solid-liquid mass ratio of 1:5, and conduct the first solid-liquid separation of the obtained reaction liquid;

[0050] (2) adding the solid obtained from the above separation into an organic acid solution of formic acid and acetic acid with a total acid concentration of 60% for acid washing, wherein the organic acid solution with a total ac...

Embodiment 2

[0061] In this embodiment, the corn stalks are first crushed to a particle size of 2 cm to 10 cm. The present embodiment extracts the technology of pulp from described corn stalk, comprises the steps:

[0062] (1) After the corn stalks are pulverized and pretreated, the treated corn stalks are cooked by using an organic acid solution with a total acid concentration of 65% formic acid and acetic acid. The mass of acetic acid and formic acid in the organic acid solution of this embodiment The ratio is 1.5:1, and hydrogen peroxide (H2O2) accounting for 4% of corn stalks is added as a catalyst before adding corn stalk raw materials. The obtained reaction solution is subjected to solid-liquid separation for the first time;

[0063] (2) adding the solid obtained from the above separation to an organic acid solution with a total acid concentration of 70% formic acid and acetic acid for acid washing, wherein the organic acid solution with a total acid concentration of 70% is added wi...

Embodiment 3

[0074] In this embodiment, firstly, the rice straw is crushed to a particle size of 2 cm to 10 cm. The technique that present embodiment extracts pulp from described straw, comprises the steps:

[0075] (1) After the rice straw is pretreated, use an organic acid solution with a total acid concentration of 95% formic acid and acetic acid to cook the treated rice straw. The mass ratio of acetic acid to formic acid in the organic acid solution of this embodiment is 2: 1, and before adding the straw raw material, add hydrogen peroxide (H 2 o 2 ) as a catalyst, control the reaction temperature at 90°C, react for 40 minutes, the solid-liquid mass ratio is 1:20, and conduct the first solid-liquid separation of the obtained reaction liquid;

[0076] (2) Add the solid obtained from the above separation to an organic acid solution of formic acid and acetic acid with a total acid concentration of 95% for acid washing, wherein the organic acid solution with a total acid concentration of...

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Abstract

The invention relates to a preparation method of paper pulp, and in particular relates to a method for preparing paper pulp from biomass raw material by utilizing organic acid. The method disclosed by the invention comprises the following step of cooking the biomass raw material to prepare the paper pulp by using the organic acid formed by formic acid and acetic acid under the catalytic action of hydrogen peroxide. The method for preparing the paper pulp provided by the invention is high in yield, short in cooking time and simple in bleaching technology. The lignin is furthest removed since the hydrogen peroxide is added in the pulping process, and carbohydrate is protected from being damaged so that high-whiteness sizing agent can be obtained by only requiring chlorine free bleaching simply in subsequent bleaching technology. Moreover, the obtained paper pulp is good in drainability, low in Kappa number and good in fiber characteristics. Moreover, black liquor generated in the process of producing paper pulp can be utilized for preparing biochar, the influence of pollutants discharged in the process of paper making to the environment is reduced, and the economic benefit and environmental benefit of enterprises are improved.

Description

technical field [0001] The invention relates to a paper pulp preparation process, specifically a process for preparing paper pulp by cooking lignocellulosic biomass raw materials with an organic acid composed of formic acid and acetic acid under the catalysis of hydrogen peroxide. A method for the production of biochar from a liquid. Background technique [0002] With the deepening of human understanding of environmental pollution and resource crisis, the renewable and degradable properties of natural polymers have attracted increasing attention. The recycling of waste and the utilization of renewable resources are major issues in contemporary economic and social development, and are also new requirements for contemporary science and technology. [0003] Lignocellulosic biomass exists in the form of plants, and its main components are cellulose, hemicellulose and lignin, of which cellulose accounts for about 40%, hemicellulose accounts for about 25%, and lignin accounts for...

Claims

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Application Information

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IPC IPC(8): D21C3/20D21C9/16D21C11/04C10B53/02
CPCY02E50/14Y02E50/10
Inventor 唐一林江成真刘洁高绍丰孙智华
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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