Preparation of biomass-based dispersant using landfill leachate, method and application thereof

A technology of landfill leachate and base dispersant, which is used in fuel additives, liquid carbon-containing fuels, petroleum industry, etc., can solve the problems of complex composition of landfill leachate, demanding reaction conditions, strong irritating odor, etc. The effect of value utilization, low cost, convenient transportation and storage

Active Publication Date: 2017-10-20
FUZHOU UNIV
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Problems solved by technology

[0004] But in general, the modification and utilization of humic acid is too simple, the performance is unstable, and some reaction conditions are harsh, which limits its application and promotion.
And because the landfill leachate has complex components and a strong pungent smell, these problems cannot be solved well by using conventional methods and the above-mentioned technical means. Therefore, the present invention provides a redox technology for preparing biomass for this type of landfill leachate. The method based on dispersant not only realizes the comprehensive utilization of the whole process, improves product performance, but also removes the irritating odor of landfill leachate and pulping black liquor, under mild conditions

Method used

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  • Preparation of biomass-based dispersant using landfill leachate, method and application thereof
  • Preparation of biomass-based dispersant using landfill leachate, method and application thereof
  • Preparation of biomass-based dispersant using landfill leachate, method and application thereof

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preparation example Construction

[0036] The preparation method of the biomass-based dispersant comprises the following steps: respectively concentrating the raw liquid of the leachate of the comprehensive garbage disposal site and the pulping black liquor to a solid content of 15-50%, homogeneously mixing with ultrasonic waves, adding a catalyst, and heating at 60-110° C. React at low temperature for 0.3~1.5h; add pH regulator to adjust the pH value of the system to 9~12, adjust the temperature to 60~120°C, add sulfonating agent, aldehyde compound, water, and react the system for 1.5~6h; properly adjust the temperature of the system to 50~100°C, add reducing agent and react for 0.5~1.5h to obtain dark gray or brown-black liquid, and obtain dark brown or dark gray powder dispersant after spray drying; the mass percentage of each raw material is as follows:

[0037] Concentrated solution of landfill leachate stock solution: 30~50%,

[0038] Concentrate of pulping black liquor: 20~35%,

[0039] pH regulator: 1....

Embodiment 1

[0049] (1) Raw materials and dosage

[0050] Concentrate of landfill leachate stock solution (20% solid content): 350kg,

[0051] Concentrated solution of bamboo pulp black liquor (solid content 30%): 150kg,

[0052] Mixture of phosphoric acid and sulfamic acid (mass ratio is 6:1): 26.8kg,

[0053] Mixture of ferrous sulfate, cobalt sulfate and nickel sulfate (mass ratio is 8:1:1): 1.0kg,

[0054] Mixture of formaldehyde and paraformaldehyde (mass ratio 1:1): 37.7kg,

[0055] Mixture of sodium sulfite, sodium bisulfite and sodium metabisulfite (mass ratio 1:2:2): 54.4kg,

[0056] The mixture of sodium borohydride and sodium formaldehyde sulfoxylate (mass ratio is 1:1): 100kg,

[0057] Water: 270kg;

[0058] (2) The preparation method, including the following steps:

[0059] The concentrated solution of 350kg landfill leachate stock solution and the concentrated solution of 150kg bamboo pulp black liquor are mixed homogeneously by ultrasonic and stand-by; pumped into the ...

Embodiment 2

[0061] (1) Raw materials and dosage

[0062] Concentrated solution of landfill leachate stock solution (22% solid content): 402 kg,

[0063] Concentrate of poplar and masson pine pulping black liquor (mass ratio 1:3, solid content 35%): 204 kg,

[0064] Mixture of oxalic acid and sulfamic acid (mass ratio is 1:1): 52.8 kg,

[0065] Mixture of ferrous sulfate, cobalt sulfate and copper sulfate (mass ratio is 8:2:1): 0.9 kg,

[0066] Mixture of formaldehyde and acrolein (4:1 mass ratio): 47.7 kg,

[0067] The mixture of sodium bisulfite and ammonium bisulfite (mass ratio is 3:1): 32.6 kg,

[0068] The mixture of sodium dithionite and sodium formaldehyde sulfoxylate (mass ratio is 1:2): 71.0kg,

[0069] Water: 189.0 kg;

[0070] (2) The preparation method includes the following steps:

[0071] Mix 402 kg of the concentrated solution of the landfill leachate stock solution and 204 kg of the concentrated solution of poplar and masson pine pulping black liquor, and mix them ho...

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Abstract

The invention relates to a biomass-based dispersant prepared by using landfill leachate and a method for preparing the biomass-based dispersant and application of the biomass-based dispersant. The method comprises the following steps: adding pulping black liquor into condensed original liquor of leachate of a comprehensive garbage disposal plant for ultrasonically homogeneous mixing; accelerating a sulfomethylation reaction through catalyst activation to obtain dark grey or brownish black liquid; and spraying and drying the liquid to obtain a deep brown or dark grey powdery dispersant, wherein the weight-average molecular weight (Mw) of the dispersant is 5000-45000 and the number-average molecular weight (Mn) of the dispersant is 2800-22000. The product is widely applied to the fields of ceramic additives, coal-water slurry dispersants and the like. Through detection, the indexes of the product meet related quality standard requirements. The production process is simple, the condition is mild, and waste is turned into wealth through conventional industrial equipment and low-price raw materials, and moreover the production process is free of three-waste discharge, so that the dispersant has wide promotional and application values and social meanings.

Description

technical field [0001] The invention relates to the fields of fine chemicals, environment-friendly materials and dispersants, in particular to a biomass-based dispersant prepared by using landfill leachate and its method and application. Background technique [0002] With the intensification of urbanization, the treatment and disposal of domestic sewage and garbage has become the bottleneck of urban development. Urban domestic waste is developing steadily in accordance with the basic policy of waste management based on reduction, harmless treatment as the main body, and resource utilization as the goal. As far as the current situation is concerned, harmless treatment technologies mainly include garbage incineration, composting and fermentation, and sanitary landfill. In view of the current technical limitations, in addition to the control and disposal of flue gas pollution, waste incineration also has the problem of leachate pollution. According to relevant statistics, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/632C10L1/12C10L1/24C10L1/188C10L1/189C10L1/198C10L1/185C10L1/182C10L1/23
CPCC04B35/632C10L1/10C10L1/1266C10L1/1275C10L1/1283C10L1/1291C10L1/182C10L1/1828C10L1/1855C10L1/1857C10L1/188C10L1/23C10L1/24C10L2300/20C10L2300/40
Inventor 刘明华杨桂芳刘以凡林春香
Owner FUZHOU UNIV
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