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Composite reverse osmosis membrane as well as preparation method and application thereof

A technology of reverse osmosis membrane and base membrane, applied in the field of membrane separation, can solve the problems of complex preparation process of reverse osmosis membrane, and achieve the effect of improving separation performance, high water flux and retention rate

Pending Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above method improves the water flux of the composite reverse osmosis membrane, it also makes the preparation process of the reverse osmosis membrane complicated.

Method used

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  • Composite reverse osmosis membrane as well as preparation method and application thereof
  • Composite reverse osmosis membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Weigh a certain amount of water-phase monomer m-phenylenediamine (MPD) and Polarclean solvent in a volumetric flask, use deionized water to make up the volume to the mark, and ultrasonically dissolve it to contain 2.0wt / v% MPD and 0.1wt / v% Polarclean homogeneous aqueous solution. Weigh a certain amount of organic phase monomer trimesoyl chloride (TMC) in a volumetric flask, adjust the volume to the mark with ISOPAR solvent oil, and ultrasonically dissolve to form a homogeneous organic phase solution containing 0.1wt / v% TMC. Use the above polysulfone porous support base membrane with a molecular weight cut-off of 30,000 to 50,000 to soak and contact the above aqueous phase solution for 60 seconds. Then pour off the excess aqueous phase solution, roll the surface of the film dry with a clean rubber roller, and then soak and contact the film with the trimesoyl chloride organic phase solution for 30 seconds. After that, the excess organic phase solution was poured off, and...

Embodiment 2

[0056] When preparing the aqueous phase solution, the mass concentration of the added aqueous phase additive Polarclean in the homogeneous solution was 1.0%, and the remaining methods and steps were the same as in Example 1. The properties of the prepared composite reverse osmosis membrane are listed in Table 1.

Embodiment 3

[0058] When preparing the aqueous phase solution, the mass concentration of the added aqueous phase additive Polarclean in the homogeneous solution was 5.0%, and the remaining methods and steps were the same as in Example 1. The properties of the prepared composite reverse osmosis membrane are listed in Table 1.

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Abstract

The invention discloses a high-flux composite reverse osmosis membrane as well as a preparation method and application thereof. The composite reverse osmosis membrane comprises a bottom layer, a porous support layer in the middle and an active separation layer on the surface, wherein the active separation layer is a polyamide active separation layer formed by interfacial polymerization of polyamine and polyacyl chloride in the presence of methyl-5-(dimethylamino)-2-methyl-5-oxopentanoate (Polarclean). By adding a water-phase additive which is simple in variety and small in dosage, the prepared composite reverse osmosis membrane has excellent water flux and keeps good interception characteristics. In addition, the preparation method is simple and convenient to operate and has a great industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a composite reverse osmosis membrane and its preparation method and application. Background technique [0002] Reverse osmosis is a process in which the pressure difference on both sides of the semi-permeable membrane is used as the driving force to make the solvent selectively pass through the membrane to achieve the separation of solvent and solute. Compared with the traditional separation process, this process has no phase change, low energy consumption, and is environmentally friendly. With high water yield, it not only plays an important role in seawater desalination, sewage treatment and ultrapure water preparation, but also is gradually being used in petrochemical, metallurgy, light industry, electronics, food, textile, medicine, bioengineering and other fields. [0003] As the core of the reverse osmosis process, the research and development and application of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00B01D69/10C02F1/44
CPCB01D69/12B01D69/125B01D67/0006B01D69/10C02F1/441
Inventor 刘轶群屈潇赛潘国元张杨于浩
Owner CHINA PETROLEUM & CHEM CORP
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