Waste-drilling-fluid decoloring agent, and preparation method and application thereof

A technology of drilling waste liquid and decolorizing agent, which is applied in mining wastewater treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of poor treatment effect, low decolorization rate, secondary pollution, etc., and achieve reduction in treatment capacity and decolorization rate The effect of high and low dosage

Active Publication Date: 2015-01-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for polysulfide drilling waste fluid, these methods cannot effectively treat the high chroma of the waste fluid, or the treatment effect cannot meet the requirements of relevant environmental protection standards
[0005] There are the following problems in the decolorization treatment of polysulfonate drilling waste: (1) The amount of treatment agent added is large, and the decolorization rate is low
When YH-3 and TS-350 organic high molecular polymer decolorizers are used to treat polysulfonate drilling waste fluid, as the amount of treatment agent increases, the color of the effluent decreases, but the COD of the effluent also increases, resulting in secondary pollution , increasing the difficulty and cost of COD removal in the later stage
(3) The adaptability of the treatment agent is not strong
Inorganic decolorizers PAC, PAFC and organic decolorizers YH-3 and TS-350 are selective for the decolorization of sulfonated drilling waste fluid. The color decolorization produced by phenolic resin is better, but for the decolorization of waste liquid containing oil and sulfonation treatment agent, such as waste oil in water, the treatment effect of PAC, PAFC, YH-3, TS-350, etc. is poor. The broad spectrum of the treatment agent is not strong

Method used

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  • Waste-drilling-fluid decoloring agent, and preparation method and application thereof
  • Waste-drilling-fluid decoloring agent, and preparation method and application thereof
  • Waste-drilling-fluid decoloring agent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present embodiment provides a decolorizing agent for drilling waste fluid, which is prepared by the following steps:

[0027] Step 1: Add 50mL of tap water to the flask, add 0.2g of aminotriacetic acid, stir and dissolve fully;

[0028] Step 2: Under continuous stirring, dissolve 12.5g of N-isopropylacrylamide, 37.5g of dimethyldiallyl ammonium chloride, 0.08g of ferrous sulfate and 0.32g of azobisisobutyl in turn Dimethyl acid;

[0029] Step 3: After passing nitrogen gas at a rate of 1.0L / min for 10min, seal the flask; adjust the constant temperature water bath oscillator to 35°C; put the flask into the constant temperature water bath oscillator, start the vibration, after 1h, stop the vibration, and continue the reaction for 3 hours After that, a jelly is obtained;

[0030] Step 4: Put the gelatinous material obtained by the polymerization reaction into a clean beaker, add acetone and ethanol for extraction and washing, put it in a drying oven, and dry it at 105...

Embodiment 2

[0032] The present embodiment provides a decolorizing agent for drilling waste fluid, which is prepared by the following steps:

[0033] Step 1: Add 60 mL of tap water to the flask, add 0.3 g of EDTA, stir and dissolve fully;

[0034] Step 2: under continuous stirring, successively dissolve 10g of acrylamide, 37.5g of methacryloyloxyethyltrimethylammonium chloride, 0.06g of sodium sulfite and 0.24g of ammonium persulfate;

[0035] Step 3: After passing nitrogen gas at 1.3L / min for 10min, seal the flask; adjust the constant temperature water bath shaker to 45°C, put the flask into the constant temperature water bath shaker, start the shaking, stop shaking after 1.5 hours, continue the reaction for 3 hours, to obtain a jelly;

[0036] Step 4: Put the gelatinous substance obtained by the polymerization reaction into a clean beaker, add acetone and ethanol for extraction and washing, put it in a drying oven, and dry it at 105°C for 5 hours to obtain a decolorizing agent for drill...

Embodiment 3

[0038] The present embodiment provides a decolorizing agent for drilling waste fluid, which is prepared by the following steps:

[0039] Step 1: add 70mL of tap water to the flask, add 0.4g of diethylenetriaminepentaacetic acid, stir and dissolve fully;

[0040] Step 2: under continuous stirring, successively dissolve 7.5g of methacrylamide, 22.5g of acryloyloxyethyltrimethylammonium chloride, 0.04g of sodium bisulfite and 0.16g of azobisisobutyronitrile;

[0041] Step 3: After passing nitrogen gas at 1.5L / min for 10min, seal the flask; adjust the constant temperature water bath shaker to 55°C, put the flask into the constant temperature water bath shaker, start the shaking, stop shaking after 2 hours, continue the reaction for 4 hours, to obtain a jelly;

[0042] Step 4: Put the colloidal liquid obtained by the polymerization reaction into a clean beaker, add acetone and ethanol for extraction and washing, put it in a drying oven, and dry it at 105°C for 5 hours to obtain a ...

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Abstract

The invention provides a waste-drilling-fluid decoloring agent, and a preparation method and application thereof. The preparation method comprises: adding 0.1-0.5 g of a complexing agent into 50 mL-70 mL of water, stirring and dissolving; under the state of continuous stirring, successively adding 7.5-12.5 g of a nonionic monomer, 22.5-37.5 g of a cationic monomer, 0.02-0.10 g of a reducing agent and 0.08-0.40 g of an oxidizing agent, introducing nitrogen at the speed of 1.0 L / min-1.5 L / min for 10 min, heating to 35-55 DEG C, shaking for 1-2 h, stopping shaking and reacting for 2-4 h, so as to obtain a gelatinoid; and performing purifying and drying processing on the gelatinoid, so as to prepare the waste-drilling-fluid decoloring agent. The invention also provides the waste-drilling-fluid decoloring agent which is prepared by employing the above preparation method. The provided waste-drilling-fluid decoloring agent prepared by employing the above preparation method is high in decoloring efficiency, is capable of effectively removing COD in a waste drilling fluid, is less in generated flocs, and is applicable to decoloring processing of polysulfonate waste drilling fluids, waste oil-in-water drilling fluids, waste high-temperature-resistant anti-sloughing drilling fluids and the like.

Description

technical field [0001] The invention relates to a decolorizing agent for drilling waste liquid, a preparation method and application thereof, in particular to a decolorizing agent for polysulfonic drilling waste liquid, a preparation method and application thereof, and belongs to the technical field of material preparation. Background technique [0002] Polysulfonated drilling fluid system is made by adding sulfonated lignite (SMC), sulfonated tannin extract (SMK), sulfonated phenolic (SMP) and other high temperature resistant sulfonated treatment agents to the conventional polymer drilling fluid system as the main treatment agent. drilling fluid system. The high temperature resistance of the sulfonated treatment agent enables the polysulfonic drilling fluid system to maintain stable drilling fluid performance in high temperature environments. At the same time, compared with other drilling fluid systems used in high-temperature formations, the cost of polysulfonic drilling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F103/10
CPCC02F1/56C02F2103/10
Inventor 谢水祥邓皓王蓉沙岳勇刘光全许毓李青洋刘晓辉任雯刘鹏张明栋孙静文魏宝莹
Owner PETROCHINA CO LTD
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