Unlock instant, AI-driven research and patent intelligence for your innovation.

Ceramic membrane and its preparation method and application

A technology of ceramic membranes and loaded membranes, applied in the field of separation membranes, can solve the problems of ceramic membrane degreasing efficiency and flux can not be taken into account, and achieve the effect of simple and fast preparation method, good stability, and low preparation cost

Active Publication Date: 2022-06-17
CHINA PETROLEUM & CHEM CORP +1
View PDF11 Cites 0 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 its preparation method and application
  • Ceramic membrane and its preparation method and application
  • Ceramic membrane and its preparation method and application

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, shape and dry;

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

[0049] 3) The product obtained in step 2) is sintered at high temperature.

[0050]In the present invention, the material layer for forming the porous support layer is formed in step 1), the material layer for forming the support film layer is coated in step 2), and the above-mentioned materials are used in step 3) to form mutually laminated porous support layers and load film layer.

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

Embodiment 1

[0079] (1) Weigh 10 kg of spherical alumina with a median particle size of 20 μm, add pore-forming agent (0.3 kg), binder (0.6 kg) and tungsten trioxide (1.2 kg) with a median particle size of 1.5 μm and mix well Then, add 4.4 kg of water and stir at low speed for 3 hours, and then smelt the mud. The obtained mixture is placed in a mold and dried at 60° C. for 5 hours to form a green porous support layer 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 and passed through a 500-mesh sieve, and the mass ratio of starch and charcoal is 3:7; the binder is glycerol , the mixture of polylactic acid and polyvinyl alcohol, the average molecular weight of the polylactic acid is 8000, 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) 100g sodium tungstate is dissolved in the 15% by weigh...

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 well After that, add 4.3 kg of water and stir at low speed for three hours, then make the mud, put it in a mold and dry it at 60°C for 5 hours to form a green porous support layer with a thickness of 0.9 mm. The composition of the pore-forming agent and the binder is the same as that of Example 1.

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

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 diameteraaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of separation membranes, and discloses a ceramic membrane, a preparation method and an application thereof. The ceramic membrane of the present invention includes a porous support layer and a supporting membrane layer formed on the porous supporting layer, the porous supporting layer contains alumina and / or zirconia, and the supporting membrane layer is composed of tungsten trioxide nanomaterials. The ceramic membrane of the invention has superhydrophilicity and good chemical stability, and solves the problem that the oil removal efficiency and flux of the ceramic membrane cannot be balanced in the past.

Description

technical field [0001] The invention relates to the technical field of separation membranes, in particular to a ceramic membrane and a preparation method and application thereof. Background technique [0002] The large amount of oily sewage discharged by petrochemical enterprises is not only a huge waste of resources, but also causes huge pollution to the environment. According to the particle size, oil pollution in water is divided into four types: oil slick (>100μm), dispersed oil (10-100μm), emulsified oil (<10μm) and dissolved oil. The traditional methods for removing dirty oil include gravity oil separation, coalescence and air flotation, etc., which are effective in removing slick oil and dispersed oil, but have low efficiency in removing emulsified oil and dissolved oil, resulting in the final sewage entering the subsequent treatment section. The oil concentration is too high, causing irreversible impact on subsequent treatment structures (such as biochemical t...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02C04B35/10C04B35/48C04B38/06C04B35/622C04B41/87B01D69/02B01D67/00C02F1/40C02F1/44
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
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com