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Prepn process of membrane material for desulfurizing FCC gasoline

A membrane material and gasoline technology, applied in the field of preparation of pervaporation membrane materials, can solve problems such as high consumption

Inactive Publication Date: 2010-12-08
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although hydrodesulfurization can effectively remove sulfides that are difficult to remove such as thiophenes, it generally has the following disadvantages: (1) RON is reduced by 7 to 10 units; (2) MON is reduced by 3 to 4 units; ( 3) Olefin addition reaction occurs, which consumes a large amount of hydrogen
For reasons of confidentiality, the above companies have only applied for patents on the membrane gasoline desulfurization process, but have not publicly reported on the membrane separation materials and membrane preparation processes for gasoline desulfurization

Method used

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  • Prepn process of membrane material for desulfurizing FCC gasoline
  • Prepn process of membrane material for desulfurizing FCC gasoline
  • Prepn process of membrane material for desulfurizing FCC gasoline

Examples

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Embodiment 1

[0027] Separation membrane preparation process: dissolve membrane material hydroxypropyl methylcellulose, crosslinking agent maleic acid (maleic acid), catalyst sodium dihydrogen hypophosphite in N-methylpyrrolidone solvent, wherein crosslinking agent The content is 14.08% (Wt%), the catalyst content is 3.69% (Wt%), and the total solid content is 12%. Electromagnetic stirring, stirring and reacting at room temperature for 12 hours, to obtain a uniform and transparent film-forming solution. Then the membrane-forming solution was filtered through a 300-mesh stainless steel mesh and allowed to stand for degassing for 2 days. In a dry and clean film-making room, apply the film-making solution on a clean glass plate with a clean glass rod. The coated glass plate was placed in a film chamber at 40°C for 12 hours to evaporate the solvent. Treat the coated glass plate at 85°C for 60 minutes to carry out esterification and cross-linking reaction. Then the membrane was removed from t...

Embodiment 2

[0030] Separation membrane preparation process: film material cellulose acetate, crosslinking agent methylene succinic acid, catalyst sodium dihydrogen hypophosphite are dissolved in acetone solvent, wherein crosslinking agent content is 16.1% (Wt%), catalyst content is 4.2% (Wt%), the total solids content is 13%. Electromagnetic stirring, stirring and reacting at room temperature for 24 hours, to obtain a uniform and transparent film-forming solution. Then the membrane-forming solution was filtered through a 300-mesh stainless steel mesh and allowed to stand for degassing for 2 days. In a dry and clean film-making room, apply the film-making solution on a clean glass plate with a clean glass rod. The coated glass plate was placed in a film chamber at 50°C for 12 hours to evaporate the solvent. Treat the coated glass plate at 100°C for 80 minutes to carry out esterification and cross-linking reaction. Then the membrane was removed from the glass plate, and dried in a vacuum...

Embodiment 3

[0033] Separation membrane preparation process: membrane material hydroxymethyl cellulose, citric acid, catalyzer sodium dihydrogen hypophosphite are dissolved in ethanol solvent, and wherein cross-linking agent content is 17% (Wt%), and catalyst content is 4.5% (Wt% ), the total solid content is 11.5%. Electromagnetic stirring, stirring and reacting at room temperature for 20 hours, to obtain a uniform and transparent film-forming solution. Then the membrane-forming solution was filtered through a 300-mesh stainless steel mesh and allowed to stand for degassing for 2 days. In a dry and clean film-making room, apply the film-making solution on a clean glass plate with a clean glass rod. The coated glass plate was placed in a film chamber at 40°C for 12 hours to evaporate the solvent. Treat the coated glass plate at 110°C for 100 minutes to carry out esterification and crosslinking reaction. Then the membrane was removed from the glass plate, and dried in a vacuum oven at 90...

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Abstract

The present invention relates to preparation process of membrane material for desulfurizing FCC gasoline. The preparation process includes the following steps: dissolving cellulose, cross-linking agent and catalyst in solvent; controlling the solid content to form homogeneous film casting liquid; coating the film casting liquid onto glass plate and volatilizing solvent at certain temperature for 6-24 hr to form membrane; modifying the membrane; and drying the separating membrane at 30-90 deg.c for 6-24 hr. The preparation process has cross-linking agent content of 12-19 wt %, catalyst contentof 2-7 wt %, solid content of 9-17 wt %, solvent volatilizing temperature of 30-60 deg.c, modifying reaction temperature of 70-120 deg.c, and modifying reaction time of 50-150 min. The present invention has the advantages of low cost and reliable quality.

Description

1. Technical field: [0001] The invention relates to a preparation method of a pervaporation membrane material, in particular to a preparation method of a membrane material for FCC gasoline desulfurization. 2. Background technology: [0002] With the continuous improvement of human's requirements for the quality of living environment, countries around the world have formulated more and more stringent standards for sulfur content in fuel oil due to the needs of environmental protection. The limit on gasoline sulfur content in Europe will start from 150μg·g in 2001 -1 Reduced to 50μg·g in 2005 -1 Canada requires that by 2005 the sulfur content of gasoline should not exceed 30 μg·g -1 . Therefore, the research on the new technology of high-efficiency desulfurization of gasoline has attracted the attention of scientists from all over the world. In addition, with China's accession to WTO, my country's gasoline standards tend to move closer to international standards, which may...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G31/11B01D71/22B01D67/00
Inventor 孔瑛林立刚杨金荣渠慧敏史德青
Owner CHINA PETROLEUM & CHEM CORP