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

Millipore filter film for fermentation industry and its preparing process

A microporous membrane, an industrial technology, applied in the field of separation membrane preparation, can solve problems such as difficulty in dissolving ammonium salt, loss of beneficial components by high temperature sterilization, and influence on the flavor of draft beer, etc.

Inactive Publication Date: 2005-08-17
EAST CHINA UNIV OF SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another example is U.S. Patent 4,775,703. There are problems in the preparation of its film-making solution, because ammonium salts are difficult to dissolve in this system.
[0003] Most of the commercially available beer is produced through pasteurization. One of the disadvantages of this process is that some beneficial ingredients are lost during high temperature sterilization, which seriously affects the unique flavor of draft beer; pure draft beer is produced by membrane filtration. It can be said to be a revolution in the beer industry. One of the keys to this technology lies in the development of highly efficient microfiltration membranes

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
  • Millipore filter film for fermentation industry and its preparing process
  • Millipore filter film for fermentation industry and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Casting solution preparation:

[0029] Put 0.06g of ammonium chloride and 0.63g of methanol in a grinding bottle, add 43ml of dimethylacetamide solvent, put it in a constant temperature box at 50°C and heat it for 5min, and then stir it on an electromagnetic stirrer to make the ammonium chloride Fully dissolve completely, add 9.5g PVDF, stir, put it in a 50°C oven to make it swell, leave it for 4 days, cool down, and let it stand for defoaming.

[0030] Scratch film:

[0031] Pour the film-making solution evenly on the glass plate to form a narrow strip, push it with a 320 μm film-making rod at a constant speed to form a film, and put it in the film-making room for 2 minutes. Immediately put in a concentration of ? Gel in a gel tank composed of wt% industrial alcohol for 2.5 minutes, and then put it into a hydrogel tank to continue gelation until the film falls off the glass plate. When gelling in a water bath, make sure that the membrane side of the glass plate is f...

Embodiment 2～6

[0041] In each of the following examples, the film-making method is the same as in Example 1. In the ratio of the casting solution, all the components used are different from those in Example 1 and are listed in Table 2. The corresponding film properties and film test results are shown in Table 2. 3.

[0042] Table 2 Embodiment 2~6 cast film ratio

[0043] Example 2 3 4 5 6

[0044] NH 4 Cl g 0.02 0.08 0.10 0.04 0.12

[0045] CH 3 OH g 0.1 0.08 0.10 0.06 0.06

[0046] PVDF g 9 8.5 8.5 9.5 9.5

[0047] C ☆ 凝胶浴 % 95 90 85 85 80

[0048] ☆Refers to the volume percentage of alcohol in the gel bath

[0049]Table 3 Embodiment 2~6 film property and film test result

[0050] Example 2 3 4 5 6

[0051] Average pore diameter μm 0.30 0.47 0.42 0.50 0.20

[0052] Maximum pore diameter μm 1.65 1.56 1.47 1.73 1.02

[0053] Porosity % 73 76 80 89 68

[0054] Pure water flux ml / cm 2 .min 50 75 69 86 45

[0055] Draft beer filtration flux ml / cm 2 .min 13...

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
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

A miropore (0.3-0.5 microns) membrane filter for fermentation industry is disclosed, and it uses polyvinylidene diffluoride as basic material. Its preparing process includes such steps as preparing the filming liquid, membrone scraping, gelatinizing and post treating. It can be used to filter raw beer. Its advantages include high throughput, slow attenuation, easy cleaning, high resistance to pollutant and high temp., and no poiston.

Description

technical field [0001] The invention relates to a preparation method of a separation membrane, in particular to a preparation method of a microporous filter membrane used in the fermentation industry using a polymer as a base material. Background technique [0002] There are many reports on the material selection and preparation methods of microfiltration membranes at home and abroad, but many of the prepared membranes have many disadvantages: such as poor pollution resistance or high temperature resistance, and what is more serious is that there are a large number of microfiltration membranes in some membranes. Toxic chemicals. In the preparation method: some have particularly harsh requirements on the preparation process. These have brought inconvenience to its actual industrial application. For example, US Patent No. 4840733 requires that the temperature and humidity in the film-making box must reach a certain value during the film-making process, and the evaporation ti...

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): B01D71/34
Inventor 曾作祥刘旭红薛为岚
Owner EAST CHINA UNIV OF SCI & TECH