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Method for producing yellow humic acid from grass type stalk

A grass and fulvic acid technology, applied in organic chemistry and other directions, can solve the problems of many manpower and material resources, limited amount of straw to deal with, and not very significant economic benefits.

Active Publication Date: 2009-06-10
SHANDONG TRALIN PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned methods require too much manpower and material resources, the amount of straw to be processed is limited, and the economic benefits are not very significant.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] (1) Ammonium cooking method

[0085] Add cooking agent to the rice straw, the amount of ammonium sulfite is 9% of the absolute dry raw material, the liquid ratio is 1:2, and steam is added for heating. When the temperature is raised to 100°C, it is kept for 20 minutes, and then small release is carried out. steam, continue to heat up to 165°C, and keep warm for 60 minutes to obtain a slurry with a concentration of 8%, and the hardness of the slurry is a potassium permanganate value of 16.

[0086] (2) Post-treatment of high hardness pulp to obtain dilute black liquor

[0087] Pulp enters from the entrance of the pulping machine, extrudes the black liquor, after extruding the black liquor, washes the pulp, merges the extruded black liquor and the black liquor of pulp washing to obtain a solid content of 15%, and a Baume degree of 9. Dilute black liquor, pH 10.

[0088] (3) Preparation of fulvic acid solution from black liquor

[0089] Adjust the pH of the dilute black...

Embodiment 2

[0092] (1) The wheat straw is cooked by the ammonium method and the anthraquinone-caustic soda method respectively

[0093] Soak the wheat straw with the impregnating liquid to make the liquid ratio reach 1:2, keep warm and mix in a spiral impregnator at 85°C for 10 minutes under normal pressure, and the impregnating liquid is 4% sodium hydroxide solution.

[0094] Add cooking chemicals to a part of wheat straw, wherein the amount of ammonium sulfite is 13% of the absolute dry raw material, and the liquid ratio is 1:4; heat it with steam, heat it up to 120 ° C for 40 minutes, and carry out small Release steam, continue to heat up to 173° C., and keep warm for 90 minutes; the obtained concentration is 15% slurry, and the hardness of the slurry is a potassium permanganate value of 28.

[0095] Add cooking chemicals to another part of wheat straw, wherein the amount of alkali used is 9% of the absolute dry raw material in terms of sodium hydroxide, the liquid ratio is 1:2, and th...

Embodiment 3

[0102] (1) The wheat straw is cooked by the ammonium method and the anthraquinone-caustic soda method respectively

[0103] The impregnating liquid impregnated the wheat straw, so that the liquid ratio reached 1:4, kept warm and mixed for 40 minutes in a spiral impregnator at 95°C under normal pressure, and the impregnating liquid was 4% sodium hydroxide solution and Baume A mixture of black liquor with a degree of 11.

[0104] Add cooking chemicals to a part of wheat straw, wherein the amount of ammonium sulfite is 10% of the absolute dry raw material, and the liquid ratio is 1:3; heat it with steam, heat it up to 110°C and keep it warm for 30 minutes. Let off steam, continue to heat up to 170°C, and keep warm for 80 minutes; obtain a slurry with a concentration of 9%, and the hardness of the slurry is a potassium permanganate value of 18

[0105] Add cooking chemicals to another part of wheat straw, wherein the amount of alkali used is 12% of the absolute dry raw material i...

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PUM

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Abstract

The invention relates to a method for preparing fulvic acid with grass straws. The method comprises: pulp is made from cellulose in the straws and is used a raw material of paper pulp; in a pulp making process, lignin is dissolved in a cooking liquor to be used as a main component of solid in a black liquor; as the lognin is fully refined after being steamed and boiled, the lognin good organic fertilizer that is easy to degrade and can be absorbed easily by crops; and at the same time, in the pulp making process, a considerable amount of fulvic acid is generated under high-temperature high-pressure conditions, so the black liquid after shoving can be used for extracting high quality fulvic acid. The method can realize comprehensive utilization of grass straws through the above steps and can achieve good economic benefits due to the expensive paper pulp, lignin and fulvic acid.

Description

[0001] This application is a divisional case of an application with the application number 200710300209.X, the application date is December 5, 2007, and the invention name is "a pulp and black liquor prepared from grass raw materials, its preparation method and its application" Application. technical field [0002] The invention relates to a method for preparing fulvic acid from grass stalks, belonging to the fields of papermaking and fertilizers. Background technique [0003] China is a large planting country of wheat, rice and other grass crops. Every harvest season, a large amount of straw is produced. The treatment and disposal of straw has become the main concern of people in daily life. People have to burn a lot of stalks or put the stalks into the river to reduce the pressure of a lot of stalks. [0004] The harm caused by straw burning and straw entering the river is enormous. It directly affects our living environment and endangers our health. With the burning of...

Claims

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Application Information

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IPC IPC(8): C07G99/00
Inventor 李洪法宋明信杨吉慧郭良进
Owner SHANDONG TRALIN PAPER
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