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Method and application of drilling fluid viscosity reducer prepared from landfill leachate

A technology of landfill leachate and drilling fluid, which is applied in the direction of drilling compositions, chemical instruments and methods, and can solve the problems of insufficient modification and utilization of humic acid, harsh reaction conditions, and restrictions on the promotion and application of humic acid

Active Publication Date: 2019-05-31
FUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of humic acid research for many years, the inventors found that the modification and utilization of humic acid are not thorough enough, the performance is not stable enough, and the reaction conditions are relatively harsh, which limits the promotion and application of humic acid. The main component of the filtrate is to use the properties of humic acid to modify it in the process of recycling landfill leachate. The present invention provides a method for preparing drilling fluid viscosity reducer for this type of landfill leachate, which not only realizes landfill seepage The resource utilization of the filtrate and the improvement of the performance of the drilling fluid viscosity reducer can not only realize the resource utilization of waste, but also solve the problem of waste pollution, and can improve the poor viscosity reduction effect of the current drilling fluid viscosity reducer , "low resistance to pressure, temperature, and salinity" and the status quo of secondary pollution

Method used

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  • Method and application of drilling fluid viscosity reducer prepared from landfill leachate
  • Method and application of drilling fluid viscosity reducer prepared from landfill leachate
  • Method and application of drilling fluid viscosity reducer prepared from landfill leachate

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preparation example Construction

[0034] According to a kind of preparation method of the high-efficiency drilling fluid viscosity reducer prepared by utilizing landfill leachate, it may further comprise the steps:

[0035] (1) Concentrate the landfill leachate stock solution through a biochemical membrane, then take the landfill leachate concentrate and add it to the concentrated sulfuric acid solution, and adjust the temperature of the reaction system to 140-180°C for constant temperature reaction for 6-12 hours. After the constant temperature reaction is completed , filtering out the solid matter in the reaction solution, and repeatedly washing the filtered solid matter with distilled water until the washing liquid is neutral, and drying the solid matter after the washing is completed;

[0036] (2) Take the above-mentioned dried solid matter and add it to an organic solvent, then add the acid chloride reactant and activator in sequence, adjust the pH value of the reaction system to 4-5, adjust the temperatur...

Embodiment 1

[0042] A high-efficiency drilling fluid viscosity reducer prepared from landfill leachate, its raw material composition and dosage are as follows:

[0043]

[0044]

[0045] Preparation:

[0046] (1) Concentrate the landfill leachate stock solution through a biochemical membrane, then get 400Kg of landfill leachate concentrate with a solid content of 15% and add it to 60Kg of 98% concentrated sulfuric acid solution with a mass fraction, and adjust the temperature of the reaction system to 140 Perform constant temperature reaction at ℃ for 6 hours. After the constant temperature reaction is completed, filter out the solid matter in the reaction solution, and repeatedly wash the filtered solid matter with distilled water until the washing liquid is neutral. After the washing is completed, dry the solid matter;

[0047] (2) Take the above-mentioned dried solid matter and add it to 100Kg of chloroform, and then add 200Kg of oxalyl chloride and sodium hydroxide in a mass rati...

Embodiment 2

[0051] A high-efficiency drilling fluid viscosity reducer prepared from landfill leachate, its raw material composition and dosage are as follows:

[0052]

[0053]

[0054] Preparation:

[0055] (1) The landfill leachate stoste is carried out concentrated treatment by biochemical membrane, then get 405Kg solid content and be that the landfill leachate concentrate of 18% joins in the concentrated sulfuric acid solution that 72.9Kg mass fraction is 98%, and reaction system temperature is adjusted to Perform a constant temperature reaction at 165°C for 8 hours. After the constant temperature reaction is completed, filter out the solid matter in the reaction solution, and repeatedly wash the filtered solid matter with distilled water until the washing liquid is neutral. After the washing is completed, dry the solid matter. ;

[0056] (2) Take the above dried solid matter and add it to 125Kg of toluene, then add 243Kg of oxalyl chloride and sodium hydroxide in a mass ratio ...

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Abstract

The invention discloses a method for preparing an efficient drilling fluid viscosity reducer by utilizing refuse leachate and application of the efficient drilling fluid viscosity reducer. The refuse leachate is subjected to concentration treatment by utilizing sulfuric acid so as to improve the structure activity of effective molecules in the refuse leachate; then an acyl chloride reaction agent is further added to react and conditions are provided for subsequent Mannich reaction and quaternization reaction, so that the molecular weight of a product is effectively improved; then prepared black loose powder is mixed and compounded with a silicon-containing compound to further improve the performance of the prepared viscosity reducer, so that the obtained viscosity reducer has high-temperature-resisting and compression-resisting viscosity reducing effects and also has salt resistance and rheological property and certain leakage reduction performance.

Description

technical field [0001] The invention relates to the fields of fine chemicals, environment-friendly materials and dispersants, in particular to a method for preparing a drilling fluid viscosity reducer from landfill leachate and an application thereof. Background technique [0002] With the acceleration of urbanization in my country, the number and scale of cities continue to expand, and the output of urban waste also increases rapidly. At present, my country produces nearly 1 billion tons of urban waste every year, and the data is still growing at an average annual rate of about 10%. , effective disposal of waste is imminent. At present, the methods of waste disposal mainly include waste incineration, composting fermentation and sanitary landfill. In view of the mature and stable sanitary landfill process, long history, simple and convenient management, low construction and operation costs, and the ability to handle various types of solid waste And other advantages, my countr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03C09K8/04
CPCC09K8/03C09K8/04C09K2208/12C09K2208/28
Inventor 刘明华王晖强刘以凡张玉清刘登周
Owner FUZHOU UNIV
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