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A micro-crosslinked cationic polyacrylamide flocculant and its preparation method and application

A polyacrylamide, cationic technology, used in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, mining wastewater treatment, etc., can solve the problem of unclear treatment effect of oily sewage on site

Active Publication Date: 2021-09-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned modified polyacrylamide flocculant has a good flocculation effect on the simulated oily wastewater in the laboratory, but the treatment effect on the oily wastewater on site is not clear

Method used

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  • A micro-crosslinked cationic polyacrylamide flocculant and its preparation method and application
  • A micro-crosslinked cationic polyacrylamide flocculant and its preparation method and application
  • A micro-crosslinked cationic polyacrylamide flocculant and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: the preparation of PADS30-2

[0037] A preparation method of micro-crosslinked cationic polyacrylamide flocculant PADS30-2, comprising the following steps:

[0038](1) Preparation of monomer aqueous solution: Accurately weigh 3.19g (44.43mmol) of acrylamide (AM), 6.04g (22.40mmol) of methacryloxyethyl dimethyl benzyl ammonium chloride (DBC), dissolve In 12.22g deionized water, stir evenly, and prepare monomer aqueous solution;

[0039] (2) Preparation of inverse emulsion: Weigh another 0.15g (0.78mmoL, accounting for the total of acrylamide, methacryloyloxyethyl dimethyl benzyl ammonium chloride and vinyltriethoxysilane). 1.15% of the mol number) of vinyltriethoxysilane (VTS), 0.28g Tween80 and 0.92g Span80 are mixed in 15.00g kerosene and prepared into an oil phase, transferred to a high-speed shearing machine, and start the high-speed shearing machine , drop the aqueous monomer solution prepared in step (1) into the oil phase, and cut for 15 min at a r...

Embodiment 2

[0043] Embodiment 2: the preparation of PADS30-3

[0044] According to the preparation method of Example 1, the difference is that 0.30 g of vinyl triethoxysilane (VTS) accounts for acrylamide, methacryloyloxyethyl dimethyl benzyl ammonium chloride and vinyl triethyl ammonium 2.27% of the total moles of the three monomers of oxysilane, and other conditions are exactly the same as in Example 1 to obtain the micro-crosslinked cationic polyacrylamide flocculant PADS30-3.

Embodiment 3

[0045] Embodiment 3: the preparation of PADS30-1

[0046] According to the preparation method of Example 1, the difference is that 0.075 g of vinyl triethoxysilane (VTS) accounts for acrylamide, methacryloyloxyethyl dimethyl benzyl ammonium chloride and vinyl triethyl ammonium 0.58% of the total moles of the three monomers of oxysilane, and the other conditions are exactly the same as those in Example 1 to obtain the micro-crosslinked cationic polyacrylamide flocculant PADS30-1.

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Abstract

The invention relates to a micro-crosslinked cationic polyacrylamide flocculant and its preparation method and application. The micro-crosslinked cationic polyacrylamide flocculant in the present invention is composed of acrylamide and methacryloyloxyethyl dimethyl benzyl ammonium chloride as the main comonomers, and vinyl alkoxysilane as the copolymerized crosslinking agent. The linked monomer is prepared by inverse emulsion free radical polymerization. Among them, vinyl alkoxysilane is used as a copolymerization cross-linking monomer, which can make the polymer molecular chain produce micro-cross-linking during the inverse emulsion polymerization reaction, and promote the chemical oil displacement agent, crude oil, suspended solids and inorganic salts in the oil production sewage. flocculation and sedimentation; the method of inverse emulsion free radical polymerization is used to control the polymerization reaction conditions and the amount of cross-linking monomer added, so that the molecular weight of the polymer is increased without affecting its water solubility, and the adsorption and bridging of the polymer , Electroneutralization and hydrophobic association are stronger, and the flocculation and separation effect on oily sewage is better.

Description

technical field [0001] The invention relates to a micro-crosslinked cationic polyacrylamide flocculant and its preparation method and application, belonging to the technical field of oily sewage treatment in oilfields. Background technique [0002] In the process of oil exploitation, with the wide application of chemical compound flooding and oil recovery technology, a large amount of crude oil sewage produced after the separation of produced fluids gathers chemical oil displacement agents, crude oil, suspended solids and inorganic salts, etc., which has complex components, high stability, Due to the characteristics of high oil content, if it is directly discharged or reinjected without treatment or with unsatisfactory treatment effects, it will not only cause waste of crude oil resources, but also seriously pollute the environment. Common treatment methods for oily sewage include: gravity sedimentation, flotation, membrane separation, demulsification and flocculation. Flocc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/34C08F220/56C08F230/08C08F2/32C02F1/56C02F101/32C02F103/10
CPCC02F1/56C02F2101/32C02F2103/10C08F2/32C08F220/34C08F220/56C08F230/085
Inventor 王明刚尹晓康柴逢鑫谭业邦
Owner SHANDONG UNIV