Molecular sieve ceramic membrane material for olefin purification as well as preparation method and application of molecular sieve ceramic membrane material

A ceramic material and molecular sieve technology, applied in the field of inorganic membrane materials, can solve the problem of inability to deeply purify polar oxygen-containing compounds, and achieve the effects of excellent rigidity and mechanical strength, high heat resistance, and low energy consumption

Active Publication Date: 2018-05-01
SHANGHAI LVQIANG NEW MATERIALS CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the technologies disclosed in the above patents and document

Method used

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  • Molecular sieve ceramic membrane material for olefin purification as well as preparation method and application of molecular sieve ceramic membrane material
  • Molecular sieve ceramic membrane material for olefin purification as well as preparation method and application of molecular sieve ceramic membrane material
  • Molecular sieve ceramic membrane material for olefin purification as well as preparation method and application of molecular sieve ceramic membrane material

Examples

Experimental program
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Example Embodiment

[0056] Example 1:

[0057] Ceramic tube pretreatment: the α-Al with an average pore diameter of 2μm and a porosity of 55% 2 O 3 The ceramic tube is baked in a muffle furnace at 200℃ for 1h, cooled to room temperature naturally, and the α-Al 2 O 3 The surface of the ceramic tube is polished smooth, deionized water is ultrasonically cleaned for 2 hours, dried in an oven at 120°C for 3 hours, and cooled for later use. Will polish smooth α-Al 2 O 3 The ceramic tube is immersed in the polydopamine solution: prepare the polydopamine solution at the ratio of 2mL polydopamine (2mg / L) / 100mL TRIS-HCl (10mmol / L), and then place the ceramic tube in the polydopamine solution under continuous stirring Soak at 25℃ for 10h, and finally dry for later use.

[0058] The preparation of molecular sieve seed liquid sol: The aluminum hydroxide, sodium silicate, sodium hydroxide, and deionized water are prepared according to n(Al):n(Si):n(Na):n(H 2 O)=2:3:12:300 The material ratio is mixed at room tempera...

Example Embodiment

[0062] Example 2:

[0063] Ceramic tube pretreatment: the α-Al with an average pore diameter of 0.1μm and a porosity of 20% 2 O 3 The ceramic tube is baked in a muffle furnace at 200℃ for 1h, cooled to room temperature naturally, and the α-Al 2 O 3 The surface of the ceramic tube is polished smooth, deionized water is ultrasonically cleaned for 2 hours, dried in an oven at 120°C for 3 hours, and cooled for later use. Will polish smooth α-Al 2 O 3 The ceramic tube is immersed in the polydopamine solution: prepare the polydopamine solution in the ratio of 2mL polydopamine (2mg / L) / 40ml TRIS-HCl (10mmol / L), and then place the ceramic tube in the polydopamine solution under continuous stirring Soak at 25℃ for 10h, and finally dry for later use.

[0064] The preparation of molecular sieve seed liquid sol: The aluminum hydroxide, sodium silicate, sodium hydroxide, and deionized water are prepared according to n(Al):n(Si):n(Na):n(H 2 O)=2:3:12:300 The material ratio is mixed at room temper...

Example Embodiment

[0068] Example 3:

[0069] Ceramic tube pretreatment: the α-Al with an average pore diameter of 5μm and a porosity of 80% 2 O 3 The ceramic tube is roasted in a muffle furnace at 200℃ for 1h, cooled to room temperature naturally, and α-Al is removed with 1500 mesh sandpaper. 2 O 3 The surface of the ceramic tube is polished smooth, deionized water is ultrasonically cleaned for 2 hours, dried in an oven at 120°C for 3 hours, and cooled for later use. Will polish smooth α-Al 2 O 3 The ceramic tube is immersed in the polydopamine solution: prepare the polydopamine solution at the ratio of 8mL polydopamine (2mg / L) / 100ml TRIS-HCl (10mmol / L), and then place the ceramic tube in the polydopamine solution under continuous stirring Soak at 25℃ for 24h, and finally dry for use.

[0070] The preparation of molecular sieve seed liquid sol: The aluminum hydroxide, sodium silicate, sodium hydroxide, and deionized water are prepared according to n(Al):n(Si):n(Na):n(H 2 O)=2:12:50:300 The material ...

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Abstract

The invention relates to a molecular sieve ceramic membrane material for olefin purification as well as a preparation method and application of the molecular sieve ceramic membrane material. In the molecular sieve ceramic membrane material, the particle sizes of molecular sieve particles supported on the surface of the ceramic material are 0.1-3 [mu]m, and the thickness of a molecular sieve layeris 3-5 [mu]m; during preparation, ceramic material pretreatment, molecular sieve seed crystal pre-coating and sealed crystallization are sequentially carried out; and the molecular sieve ceramic membrane material is used for removing a polar oxygenated compound in a gaseous olefin flow to be 1ppm or below. Compared with the prior art, the molecular sieve ceramic membrane material prepared by the preparation method of the invention has the molecular sieve layer with higher mechanical strength, larger specific surface area and uniform thickness, in addition, the molecular sieve layer has no longitudinal or horizontal cracks, has no air pores in the surface and is high in bonding strength and not easy to fall off; and when the polar oxygenated compound in the olefin flow is adsorbed, the purification depth is 1ppm or smaller, so that not only is the mass transfer resistance lower, but also the energy consumption is lower, and the regeneration capacity is high.

Description

technical field [0001] The invention belongs to the technical field of inorganic membrane materials, and relates to a molecular sieve ceramic membrane material used for olefin purification and its preparation and application. Background technique [0002] The polyolefin industry is the pillar of the petrochemical industry and occupies an important strategic position in the country. As a key prerequisite for olefin polymerization, the deep purification technology of polymer grade olefins has a huge impact on the quality and output of polyolefin products, as well as the future development of the downstream plastics industry. With the replacement of olefin polymerization catalysts, the catalysts have higher and higher requirements on the purity of ethylene, propylene, butene and other raw materials. At present, the production technologies of olefins mainly include: steam cracking, catalytic cracking, catalytic dehydrogenation, methanol to olefins (MTO), methanol to propylene (...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D71/02B01J20/18B01J20/30C04B41/85C07C7/13C07C11/04C07C11/02
CPCB01D67/0079B01D71/028B01J20/06B01J20/08B01J20/18B01J2220/4806B01J2220/4812C04B41/009C04B41/5024C04B41/85C07C7/13C07C11/04C07C11/02C04B35/10Y02P30/40
Inventor 陈伟周永贤张春秀王鹏飞何秋平徐华胜张伏军
Owner SHANGHAI LVQIANG NEW MATERIALS CO LTD
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