Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ceramic membrane, and preparation method and application thereof

A technology of ceramic membrane and loaded membrane, which is applied in the field of separation membrane, can solve the problem that the oil removal efficiency and flux of the ceramic membrane cannot be taken into account, and achieve the effects of simple and fast preparation method, good stability and low preparation cost.

Active Publication Date: 2020-05-15
CHINA PETROLEUM & CHEM CORP +1
View PDF11 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a novel ceramic membrane based on tungsten trioxide and its preparation method and application in order to overcome the above-mentioned problems existing in the ceramic membrane of the prior art. The ceramic membrane has superhydrophilicity and good chemical stability , to solve the problem that the oil removal efficiency and flux of the ceramic membrane cannot be balanced in the past

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ceramic membrane, and preparation method and application thereof
  • Ceramic membrane, and preparation method and application thereof
  • Ceramic membrane, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] A second aspect of the present invention provides a method for preparing a ceramic membrane, the method comprising the steps of:

[0047] 1) After uniformly mixing the composition containing alumina and / or zirconia, pore-forming agent and binder, molding and drying;

[0048] 2) coating the mixture containing tungsten-containing compound and organic acid on the product obtained in step 1);

[0049] 3) Sintering the product obtained in step 2) at a high temperature.

[0050]In the present invention, in step 1), molding is used to form the material layer of porous support layer, and in step 2) coating is used to form the material layer of supporting film layer, and in step 3) utilizes above-mentioned material to form mutually stacked porous support layer and the supporting film layer.

[0051] In the above step 1), the alumina and / or zirconia are uniformly mixed with the pore-forming agent and the binder, molded, dried and sintered at high temperature to obtain a porous ...

Embodiment 1

[0079] (1) Weigh 10kg of spherical alumina with a median particle size of 20μm, add pore-forming agent (0.3kg), binder (0.6kg) and tungsten trioxide (1.2kg) with a median particle size of 1.5μm and mix thoroughly Finally, 4.4 kg of water was added and stirred at a low speed for three hours, and then the mud was smelted, and the obtained mixture was placed in a mold and dried at 60° C. for 5 hours to form a porous support layer green body with a thickness of 1.0 cm.

[0080] Wherein, the pore-forming agent is a mixture of starch and charcoal, the starch is amylose, the charcoal is ground through a 500 mesh sieve, and the mass ratio of starch and charcoal is 3:7; the binder is glycerin , a mixture of polylactic acid and polyvinyl alcohol, the average molecular weight of the polylactic acid is 8000, and the molecular weight of the polyvinyl alcohol is 2000; the mass ratio of the glycerin, polylactic acid and polyvinyl alcohol is 5:2: 3.

[0081] (2) Dissolve 100g of sodium tungs...

Embodiment 2

[0087] (1) Weigh 10kg of spherical zirconia with a median particle size of 15μm, add pore-forming agent (0.4kg), binder (0.8kg) and tungsten trioxide (1.2kg) with a median particle size of 1.5μm and mix thoroughly Finally, add 4.3 kg of water and stir at a low speed for three hours to make the mud, place it in a mold and dry it at 60° C. for 5 hours to form a porous support layer green body with a thickness of 0.9 mm. The pore forming agent and the binder composition are the same as in Example 1.

[0088] (2) 100g sodium tungstate is dissolved in 150g of 15% by weight hydrogen peroxide solution, and 50g organic acid solution (the mixed solution of tartaric acid and salicylic acid, the weight ratio of tartaric acid and salicylic acid) is added dropwise by using a syringe pump 1:1 total 20% by weight), stirring while adding dropwise, controlling the dropwise addition time not to exceed 15min, continuing to stir for 2h after the dropwise addition to form a uniform colloidal emuls...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of separation membranes, and discloses a ceramic membrane, and a preparation method and an application thereof. The ceramic membrane comprises a porous supporting layer and a loaded membrane layer formed on the porous supporting layer, the porous supporting layer contains alumina and / or zirconium oxide, and the loaded membrane layer is made of a tungsten trioxide nanomaterial. The ceramic membrane has super hydrophilicity and good chemical stability, and solves the problem that the oil removal efficiency and flux of the conventional ceramic membranecannot be considered at the same time.

Description

technical field [0001] The invention relates to the technical field of separation membranes, in particular to a ceramic membrane and its preparation method and application. Background technique [0002] A large amount of oily sewage discharged by petrochemical enterprises is not only a great waste of resources but also a huge pollution to the environment. According to the particle size, oil pollution in water can be divided into four types: slick oil (>100 μm), dispersed oil (10-100 μm), emulsified oil (<10 μm) and dissolved oil. Traditional oil removal methods include gravity oil separation, coalescence and air flotation, etc., which are effective in removing slick oil and dispersed oil, but are less efficient in removing emulsified oil and dissolved oil, resulting in the pollution that finally enters the subsequent treatment section. High oil concentration will cause irreversible impact on subsequent treatment structures (such as biochemical treatment section). The...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/10C04B35/48C04B38/06C04B35/622C04B41/87B01D71/02B01D69/02B01D67/00C02F1/40C02F1/44
CPCC04B35/10C04B35/48C04B38/068C04B35/62218B01D71/024B01D71/025B01D69/02B01D67/0039B01D67/0041C02F1/40C02F1/44C04B41/87C04B41/009C04B41/5072B01D2325/36B01D2325/30C04B38/0645C04B41/0072C04B41/4558
Inventor 宋项宁周志国李超赵乾斌郭亚逢唐晓丽姚猛
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com