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Method for preparing heat and salinity tolerance filtrate reducer from waste polystyrene foam

A technology of waste polystyrene and fluid loss control agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems that have not been reported before, achieve excellent salt resistance, eliminate white pollution, and low production cost Effect

Active Publication Date: 2014-05-14
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no report on the use of waste polystyrene foam to prepare fluid loss control agents with excellent performance in temperature resistance and salt resistance

Method used

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  • Method for preparing heat and salinity tolerance filtrate reducer from waste polystyrene foam

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for preparing a temperature-resistant and salt-resistant fluid loss reducer by using waste polystyrene foam, the steps are as follows:

[0035] (1) Add 50g of waste polystyrene foam crushed to 5mm into the reaction bottle;

[0036] (2) Pour 150ml of methyl ethyl ketone liquid into the above reaction bottle, stir and dissolve, then raise the temperature to 40°C; 3 Gas (40ml / min) for 120min, then stop the ventilation and cool down to room temperature to obtain the waste polystyrene foam modified mixture;

[0037] (3) adjust the pH=9 of the waste polystyrene foam modified mixture obtained in step (2) with 20wt% NaOH solution;

[0038] (4) Move the solution in step (3) into a vacuum distillation device, and distill at 85°C for 1h at a vacuum of -0.5kPa; dry the product obtained by removing the solvent at 105°C for 10h, and crush it to 40 meshes. That is the product.

Embodiment 2

[0040] A method for preparing a temperature-resistant and salt-resistant fluid loss reducer by using waste polystyrene foam, the steps are as follows:

[0041] (1) Add 50g of polystyrene foam waste crushed to 5mm into the reaction bottle;

[0042] (2) Pour 150ml methyl ethyl ketone aqueous solution (methyl ethyl ketone: water mass ratio is 40:1) into the above reaction bottle, stir and dissolve, then raise the temperature to 40°C; pass SO into the above solution 3 Gas (40ml / min) for 120min, then stop the ventilation and cool down to room temperature to obtain the waste polystyrene foam modified mixture;

[0043] (3) adjust the pH=8 of the waste polystyrene foam modified mixture obtained in step (2) with 20wt% NaOH solution;

[0044] (4) Move the solution in step (3) into a vacuum distillation device, and distill at 85°C for 1h at a vacuum of -0.5kPa; dry the obtained solvent-removed product at 105°C for 10h, crush it to 60 mesh, That is the product.

Embodiment 3

[0046] A method for preparing a temperature-resistant and salt-resistant fluid loss reducer by using waste polystyrene foam, the steps are the same as in Example 1, the difference is that in step (2), SO 3 The gas time is 80 minutes; in step (3), adjust the pH of the waste polystyrene foam modified mixture obtained in step (2) to 8.

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Abstract

The invention relates to a method for preparing a heat and salinity tolerance filtrate reducer from waste polystyrene foam. According to the method, used raw materials include 20-35 percent of waste polystyrene foam, 50-70 percent of solvent and 5-25 percent of sulfonating agent. The method comprises the following steps: crushing and dissolving the waste polystyrene foam in a solvent, carrying out sulfonating, neutralizing and solvent removal by evaporation on the waste polystyrene foam by using SO3 or concentrated sulfuric sulfonating agent, and drying to obtain the heat and salinity tolerance filtrate reducer. The heat and salinity tolerance filtrate reducer prepared by the method disclosed by the invention has the heat and salinity tolerance filtrate reduction property superior to that of widely used sulfonated phenolic resin; meanwhile, the method is a beneficial method capable of eliminating white pollution.

Description

technical field [0001] The invention relates to a method for preparing a temperature-resistant and salt-resistant fluid loss reducer by using waste polystyrene foam, and belongs to the technical field of preparation of drilling fluid additives. Background technique [0002] Filtrate reducer is an important drilling fluid treatment agent used to ensure the stability of drilling fluid performance, reduce the loss of harmful liquid to the formation, stabilize the well wall and ensure regular well diameter. There are many kinds of fluid loss reducers, mainly natural products (such as cellulose, lignin, starch, lignite) and synthetic polymers (such as phenolic resins, hydrolyzed polyacrylonitrile and multi-polymers) ). Although natural products have a wide range of sources and low cost, they usually need to be modified to meet the use requirements, and most products have the disadvantages of lack of temperature resistance and easy mildew. Synthetic polymer products can be desig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F12/08C08F8/36C09K8/035
Inventor 张文郁申焕王琳琳
Owner QILU UNIV OF TECH
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