Polyurethane/polyvinylidene fluoride composite film for extracting organic sulfide from naphtha and preparation method thereof

A technology of polyvinylidene fluoride membrane and polyvinylidene fluoride, which is applied in the field of polyurethane/polyvinylidene fluoride composite membrane and its preparation, can solve the problems of low permeation flux and affecting the extraction rate of sulfur-containing organic compounds, and achieve separation efficiency High, mild conditions, the effect of improving the extraction rate

Active Publication Date: 2020-05-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polyurethane has strong chemical stability, strong solvent resistance, strong hydrophobic and organic properties, and is an ideal material for membrane production. When it is directly used to extract sulfur-containing organic compounds from naphtha, it will penetrate through The amount is low, affecting the extraction rate of sulfur-containing organic compounds

Method used

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  • Polyurethane/polyvinylidene fluoride composite film for extracting organic sulfide from naphtha and preparation method thereof
  • Polyurethane/polyvinylidene fluoride composite film for extracting organic sulfide from naphtha and preparation method thereof
  • Polyurethane/polyvinylidene fluoride composite film for extracting organic sulfide from naphtha and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Put the mass ratio of 1:0.15:6.54, that is, 45.883g polyvinylidene fluoride, 7.058g polyethylene glycol, and 300g N-methylpyrrolidone into a round bottom flask, stir in a water bath at 50°C for 12 hours, and dissolve completely Filtration and defoaming, adjust the thickness of the scraper of the film scraping machine to 100 μm, scrape the film on the non-woven fabric, immerse the scraped film in deionized water for 72 hours, and then put it in a 60°C oven to dry to obtain polyvinylidene fluoride with a thickness of 110-120 μm Vinyl membrane, i.e. support layer;

[0034] 2. Add the mass ratio of 2:0.1:12, that is, 2g polyurethane, 0.1g polyethanol, and 12g tetrahydrofuran into the Erlenmeyer flask, dissolve at room temperature, and obtain the casting solution;

[0035] Filter the prepared casting solution with a 300-mesh copper mesh, then let the filtered casting solution stand for 2 hours to remove air bubbles, and obtain a polyurethane casting solution as an active ...

Embodiment 2

[0038] 1. Put 50.285g of polyvinylidene fluoride, 5.145g of polyethylene glycol, and 300g of N-methylpyrrolidone at a mass ratio of 1:0.1:5.97 into a round-bottomed flask, stir in a water bath at 50°C for 12 hours, and dissolve completely Filtration and defoaming, adjust the thickness of the scraper of the film scraping machine to 100 μm, scrape the film on the non-woven fabric, immerse the scraped film in deionized water for 72 hours, and then put it in a 60°C oven to dry to obtain polyvinylidene fluoride with a thickness of 110-120 μm Vinyl membrane, i.e. support layer;

[0039] 2. Add the mass ratio of 2:0.15:12, that is, 2g polyurethane, 0.15g polyethylene glycol, and 12g tetrahydrofuran into the Erlenmeyer flask, dissolve at room temperature, and obtain the casting solution;

[0040] Filter the prepared casting solution with a 300-mesh copper mesh, then let the filtered casting solution stand for 2 hours to remove air bubbles, and obtain a polyurethane casting solution as...

Embodiment 3

[0043] 1. Put the mass ratio of 1:0.2:7.41, that is, 47.241g polyvinylidene fluoride, 9.365g polyethylene glycol, and 350g N-methylpyrrolidone into a round bottom flask, stir in a water bath at 50°C for 12 hours, and filter after completely dissolving , Degassing, adjust the thickness of the scraper of the film scraping machine to 100 μm, scrape the film on the non-woven fabric, immerse the scraped film in deionized water for 72 hours, and then put it in a 60°C oven to dry to obtain polyvinylidene fluoride of 110-120 μm Membrane, i.e. support layer;

[0044] 2. Add the mass ratio of 2:0.2:12, that is, 2g polyurethane, 0.2g polyethylene glycol, and 12g tetrahydrofuran into the Erlenmeyer flask, dissolve at room temperature, and obtain the casting solution;

[0045] Filter the prepared casting solution with a 300-mesh copper mesh, then let the filtered casting solution stand for 2 hours to remove air bubbles, and obtain a polyurethane casting solution as an active layer.

[004...

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Abstract

The invention discloses a polyurethane / polyvinylidene fluoride composite membrane for extracting organic sulfides from naphtha, relates to the technical field of composite membrane material processing, and consists of an active layer and a supporting layer. The active layer is a polyurethane casting film, and the supporting layer is A polyvinylidene fluoride membrane, and the active layer is coated on the support layer to prepare a polyurethane / polyvinylidene fluoride composite membrane, and a preparation method of the polyurethane / polyvinylidene fluoride composite membrane is disclosed. The beneficial effect of the present invention is that the polyurethane / polyvinylidene fluoride composite membrane prepared by the present invention can be used for the extraction of organic sulfides in naphtha, has high separation efficiency, simple device, convenient operation, mild conditions, and the composite The membrane basically does not change the properties such as the octane number of the raw oil, and can significantly increase the extraction rate of organic sulfides.

Description

technical field [0001] The invention relates to the technical field of composite membrane material processing, in particular to a polyurethane / polyvinylidene fluoride composite membrane obtained by extracting organic sulfide from naphtha and a preparation method thereof. Background technique [0002] At present, as countries around the world pay more and more attention to environmental protection and environmental protection regulations become increasingly strict, the production of clean oil products has become an important research topic worldwide. The sulfides contained in naphtha exist in the form of elemental sulfur, hydrogen sulfide, mercaptan, sulfide, and thiophene, among which organic sulfide is the main component. The traditional treatment process is hydrodesulfurization, which has high costs and harsh operating conditions. Organic sulfides are converted into hydrogen sulfide after hydroprocessing, and can only be recycled and discharged after complex tail gas treat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G31/11B01D69/10B01D69/12B01D71/58B01D67/00
CPCB01D67/0002B01D69/10B01D69/12B01D71/58C10G31/11B01D2325/24C10G2300/202B01D67/0011B01D67/0013B01D71/34B01D71/54B01D71/52B01D61/145B01D67/00091B01D69/1213B01D2325/04B01D71/5211B01D69/1071
Inventor 侯影飞许杨王目敏陈聪聪李熠宇牛青山
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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