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Sulfur-containing ether polyamine as well as preparation method and application thereof

A technology containing sulfide and sulfide, which is applied in the preparation of sulfide, chemical instruments and methods, organic chemistry, etc., can solve the problem of few application reports of chlorine-resistant and anti-oxidative sulfur-containing separation membrane materials, the decrease of rejection rate, and the loss of membrane flow. In order to achieve the effect of excellent anti-biological pollution performance, lower operation and use costs, and longer service life

Active Publication Date: 2018-12-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these modification methods have more or less improved the chlorine resistance of the composite membrane, they are usually accompanied by the problems of decreased flux, decreased rejection rate, complicated process and increased cost of the membrane.
[0005] Up to now, there are few reports on its application as a chlorine-resistant and anti-oxidation sulfur-containing ether separation membrane material and its application in the field of highly active chlorine separation membranes.

Method used

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  • Sulfur-containing ether polyamine as well as preparation method and application thereof
  • Sulfur-containing ether polyamine as well as preparation method and application thereof
  • Sulfur-containing ether polyamine as well as preparation method and application thereof

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preparation example Construction

[0053] The preparation method of the sulfide-containing polyamine provided by the invention can adopt the following steps:

[0054] (1) Preparation of semi-aromatic polyhalogenated amide monomer

[0055] Add 103 to 232 parts of polyamine, 120 to 220 parts of alkali, and 1 to 50 parts of surfactant into 500 to 2000 parts of deionized water in sequence, and dissolve at room temperature; add 522 to 696 parts of p-chlorobenzoyl chloride or Mix 475.5-634 parts of fluorobenzoyl chloride with 600-5000 parts of organic solvent and add it into the three-necked flask, then add the polyamine solution prepared above into the above-mentioned three-necked flask, and wait until the polyamine solution is added dropwise Afterwards, continue to react at room temperature for 2 to 12 hours to generate semi-aromatic polyhalogenated amide monomers;

[0056] (2) Purification of semi-aromatic polyhalogenated amide monomers

[0057] Distill the organic solvent in the above-mentioned semi-aromatic po...

Embodiment 1

[0068] One, the preparation of sulfide-containing triamine monomer comprises the steps:

[0069] (1) Preparation of semiaromatic trichloroamide monomer

[0070] Add 103g of diethylenetriamine, 120g of NaOH, and 1g of sodium citrate into 500ml of deionized water in sequence, and dissolve at room temperature to obtain a polyamine solution; mix 522g of p-chlorobenzoyl chloride with 600ml of dichloromethane and add to three In the neck flask, then the above-mentioned configured polyamine solution is added dropwise in the above-mentioned three-necked flask, after the polyamine solution is added dropwise, continue to react at room temperature for 12h to generate a semi-aromatic trichloroamide monomer;

[0071] (2) Purification of semiaromatic trichloroamide monomer

[0072] Evaporate the organic solvent in the above-mentioned semi-aromatic trichloroamide, filter, collect the filter cake, wash the filter cake three times with deionized water, remove water-soluble impurities, and the...

Embodiment 2

[0093] One, the preparation of sulfide-containing tetramine monomer comprises the steps:

[0094] (1) Preparation of semi-aromatic tetrafluoroamide monomer

[0095] Add 174g of triethylenetetramine, 220g of NaOH, and 10g of sodium dioctyl succinic acid sulfonate into 1000ml of deionized water, and dissolve at room temperature; mix 634g of p-fluorobenzoyl chloride with 2000ml of n-hexane and add neck flask, then the above-mentioned configured polyamine solution is added dropwise in the above-mentioned three-necked flask, after the polyamine solution is added dropwise, the reaction is continued for 2h at room temperature to generate a semi-aromatic tetrafluoroamide monomer;

[0096] (2) Purification of semi-aromatic tetrafluoroamide monomer

[0097] The organic solvent in the above-mentioned semi-aromatic tetrafluoroamide was distilled off, filtered, and the filter cake was collected. The filter cake was washed three times with deionized water to remove water-soluble impurities...

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Abstract

The invention relates to a sulfur-containing ether polyamine as well as a preparation method and application thereof, a chlorine-resistant anti-oxidation sulfur-containing ether separation membrane and a preparation method thereof, and belongs to the field of macromolecule materials. The invention provides a preparation method of sulfur-containing ether polyamine. The preparation method comprisesthe following steps: preparing a semi-aromatic poly-halogenated amide monomer; purifying a crude product of the semi-aromatic poly-halogenated amide monomer; preparing a sulfur-containing ether polyamine monomer; purifying a sulfur-containing ether polyamine solution. Polyamine with a reducing group of a high content, namely a sulfur ether (-S-), is synthesized for a first time, the reducing sulfur ether structure of the high content is capable of reacting with active chlorine, and most oxidative chlorine in a separation membrane oxidation treatment process can be consumed; meanwhile, by virtue of multiple amino groups and acyl chloride in a molecular chain, a multi-crosslinking structure can be formed, and the strength of an interface separation layer can be further improved, so that theseparation efficiency and properties of the separation membrane can be maintained, the service life of the separation membrane can be greatly prolonged, and the use cost of the separation membrane canbe reduced.

Description

technical field [0001] The invention relates to a sulfide-containing polyamine and its preparation method and application, as well as a chlorine-resistant and anti-oxidation sulfide-containing separation membrane and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Membrane separation science is a new scientific research on separation that rose rapidly after the 1960s. Membrane separation has been widely used in food, medicine, biology, energy, water treatment, bionics, etc. The field has had a huge impact on human production and life, and has become one of the most important means in today's separation science. The separation membrane is the core of the membrane separation process, and the membrane material is the basis for the development of the separation membrane. Due to its good separation effect, wide pH range, energy saving and environmental protection, aromatic polyamide composite membrane (TFC membrane) has b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C319/14C07C323/62B01D67/00B01D69/02B01D71/66C08J7/12C08L27/16C08L81/06C08L77/00C08L67/02
Inventor 张刚曹素娇杨杰严光明吴喆夫
Owner SICHUAN UNIV
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