Method for extracting cellulose, lignose and compound fertilizer from cotton-seed hull

A technology of lignin and cottonseed hulls, which is applied in the field of extracting cellulose, lignin and compound fertilizer, can solve the problems of environmental pollution and high cost of pollution control, and achieve the effect of improving the comprehensive utilization rate of raw materials and high promotion and use value

Inactive Publication Date: 2009-07-08
JIAHE BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process often adopts chemical method, using the mixture of sodium hydroxide and sodium sulfide as the cooking agent. The waste liquid after cooking is directly discharged without rational use, and contains a large amount of chlorine, sulfur, sodium, etc., causing serious environmental pollution. The cost of pollution control is very high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 1 kg of cottonseed hulls to a solution of 10 g of lignin eluting agent and 5 kg of water, heat to 80°C for cooking reaction for 6 hours, after the reaction is complete, the crude fibers can be separated, rinsed, refined, and dried. Finished fiber is 0.4 kg, and the solution after rinsing is sent to the soaking container for reuse; the solution in the first boiling pool is acidified, and the solid is separated out by pressure filtration to obtain 0.2 kg of lignin; the solution after lignin is extracted, and the pH value is adjusted , after concentration, spray-dried and granulated to obtain 0.21 kg of compound fertilizer. The lignin stripping agent consists of 7-8 parts of potassium phosphate, 1.9-2.9 parts of potassium permanganate and 0.1 part of wood penetrating agent by mass.

Embodiment 2

[0015] Add 0.5 tons of cottonseed hulls to a solution of 60 kg of lignin solvent and 3,000 kg of water, heat to 85°C for cooking and reaction for 5 hours, after the reaction is complete, the crude fibers can be separated, rinsed, refined, and dried. Obtain 0.21 tons of fiber products, and the solution after rinsing is sent to the soaking container for reuse; the solution in the first boiling pool is acidified, and the solids are separated out by pressure filtration, which is 0.09 tons of lignin; the solution after lignin is extracted, the pH is adjusted value, concentrated, spray-dried and granulated to obtain 0.1 tons of compound fertilizer. The composition of the lignin stripping agent is the same as in Example 1.

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PUM

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Abstract

The invention provides a method for extracting cellulose, lignin and composite fertilizer from cottonseed shell, which comprises the following steps: adding lignin dissolving agent and water into a container according to the proportion of 1-5:1000; adding 10-20 liquid amount of cottonseed shells; heating to 70-90 degrees centigrade and keeping for 6-10 hours; separating out crude fibers, rinsing, refining and drying to obtain the finished fiber product; sending the rinsed solution into the socking container for reuse; acidifying the solution in the first boiling pool, and press filtering to precipitate solid that is lignin; adjusting the pH value of the solution after lignin extraction to neutral, concentrating, drying, granulating to obtain composite fertilizer. Besides the cellulose, the invention can co-produce lignin and composite fertilizer, changes improves the abuses of single product, water resource waste and serious environment pollution existing in the current technologies in our country.

Description

Technical field: [0001] The invention relates to a method for extracting cellulose, lignin and compound fertilizer from cottonseed hulls. Background technique: [0002] The annual output of cottonseed hulls, a by-product of cotton in my country, reaches 4.12 billion kilograms. The existing cottonseed hull processing and utilization technologies include: using cottonseed hulls to make roughage for cattle and sheep; cottonseed hulls to biologically prepare xylo-oligosaccharides; using cottonseed hulls as raw materials for edible fungus cultivation materials; cottonseed hulls as raw materials to make concrete reducing Water agent, etc. These technologies are all about extracting and utilizing some raw material components, but they have not realized the maximum value of raw materials. The common problems are low raw material utilization rate, single product, little value-added processing, serious "three wastes" in the processing process, and direct and social benefits of enterpr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00C07G1/00C05G1/00
Inventor 任宪君
Owner JIAHE BIOTECH
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