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A method for removing dissolved oxygen in viscous liquid

A viscous liquid, dissolved oxygen technology, applied in liquid degassing, separation methods, chemical instruments and methods, etc., can solve problems such as inconvenience in operation, and achieve the effect of easy operation

Active Publication Date: 2016-06-15
DAGANG OIL FIELD GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, ampoules are also used, and high-temperature flames are also required to seal the ampoules, which is dangerous and inconvenient to operate.

Method used

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  • A method for removing dissolved oxygen in viscous liquid

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Experimental program
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Effect test

Embodiment 1

[0022] A method for removing dissolved oxygen in viscous liquid, comprising the steps:

[0023] (1) Put the 30ml sample bottle containing the polymer solution on the sample bottle rack without the rubber stopper, place the sample bottle rack in a vacuum desiccator with good sealing performance, put the cover of the vacuum desiccator and the Coat the edges with Vaseline to seal when vacuuming. Connect the top of the vacuum dryer to the pipeline interface, and connect the pressure gauge seat with the pressure-resistant rubber pipeline. The pressure gauge seat is connected to the buffer bottle, and the buffer bottle is connected to the vacuum pump to form a vacuum system. Connect the vacuum desiccator to the nitrogen cylinder, open the valve of the nitrogen cylinder and the pressure reducing valve, discharge the air existing in the pipeline between the vacuum desiccator and the pressure gauge seat, and then close the valve. As shown in Table 1, the vacuuming time is determined a...

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Abstract

The invention provides a method for removing dissolved oxygen in a viscous liquid. The method comprises following steps: putting a sample bottle filled with the viscous liquid into a vacuum drier, wherein the higher the viscosity of the liquid is, the longer the vaccumizing time is; after vacuumizing, connecting the vacuum drier with high-purity nitrogen, opening a valve used for communicating a high-purity nitrogen bottle with the vacuum drier, so that the negative pressure of the vacuum drier is up to an atmospheric pressure; then putting the sample bottle filled with the viscous liquid into an anaerobic glovebox and carrying out secondary deoxidizing; and finally capping the sample bottle with a rubber stopper and sealing the sample bottle with an aluminum cap, thereby finishing the deoxidizing process. The method for removing the dissolved oxygen in a polymer such as the viscous liquid is simple, convenient, safe and reliable, and the negative influence of the oxygen on the viscous liquid is prevented.

Description

technical field [0001] The invention relates to a method for removing dissolved oxygen, in particular to a method for removing dissolved oxygen in viscous liquid. Background technique [0002] In polymer flooding technology, thermal stability evaluation of polymer thermal solution is a key parameter. Generally speaking, in the polymer flooding field test, the treated injection water is mixed with polymer dry powder at the central station to prepare a mother liquor, which is diluted into the target liquid in the water injection pipeline or a large tank, and then injected into the oil layer for oil displacement. Enhanced recovery. Samples for evaluation of polymer thermal stability were taken from the wellhead of the polymer injection well, dispensed in-house into test vials and initial viscosity was measured. Put the vial containing the polymer solution taken from the wellhead in the anaerobic glove box, remove residual oxygen by low-pressure evacuation, nitrogen replacemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/00G01N1/34
Inventor 冯庆贤柳敏于娣杨怀军
Owner DAGANG OIL FIELD GRP