Use of Cyclodextrins for Reducing Deposits During Paper Production
a technology of cyclodextrin and paper production, which is applied in the field of reducing deposits during paper production, can solve the problems of reducing the quality of paper products, severe deposits on process equipment, and difficult to achieve the effect of preventing or reducing deposits
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Problems solved by technology
Method used
Examples
example 1
Removal of Fatty Acids from Solution by α-Cyclodextrin
[0067]Removal of fatty acids from solutions by addition of α-cyclodextrin was tested by preparing a 0.1% linoleic acid suspension and a 1.0% α-cyclodextrin solution as follows:
1. 250 μl linoleic acid was transferred to a 250 ml volumetric flask.
2. Deionized water was slowly added while agitating on a whirly mixer.
3. Linoleic acid solution stays suspended as long as agitation is continued.
[0068]A 1.0% α-cyclodextrin solution was prepared by dissolving 2 g of α-cyclodextrin in 200 ml deionized water.
[0069]The 0.1% linoleic acid suspensio was mixed with the 1.0% cyclodextrin solution at different ratios of fatty acid to cyclodextrin and the increase in turbidity was determined. The results are given in the Table 1 below.
TABLE 1Turbidity (NTU, Nephelometric Turbidity Units) measurements of mixturesof fatty acid (FA) and cyclodextrin (CD).FattyacidVolumeCyclodextrin,VolumeWaterRatioTurbidityTest tube0.1%(ml)1.0%(ml)(ml)FA:CD(NTU)1Lino...
example 2
Use of Cyclodextrin for Wash Deinking of ONP
[0071]Deinking of old newspaper (ONP) by adding cyclodextrin during pulp formation and subsequent washing was tested using the following protocol:
[0072]Add 50 g of shredded old newspaper, 1500 ml of water and 4 kg / ton of Tomah wash deinking surfactant to a pulper. Set the temperature at 45° C. Add cyclodextrin (2 kg / t) and mix for 10 minutes. Transfer slurry into a bucket with 1.5 l of water at the same temperature as the slurry and stir the slurry for 30 min. Make No Wash (NW), Wash (W), and Hyper Wash (HW) pads after 5 minutes and 30 minutes of stirring.
[0073]For a No Wash pad (NV), weigh out 180 g. of slurry, fill up to 300 ml with water, stir, and pour into filter with a Whatman 40 ashless filter paper. For Wash pad (W), weigh out 180 g of slurry, and wash with 1 L of DI water in a Britt jar. Hyper Wash (HW) pads were made in the same manner as the wash pad (W) except using 5 L of DI water during washing.
[0074]The pads are evaluated fo...
example 3
Use of Cyclodextrin for Deinking of ONP by Flotation
[0076]Deinking of old newspaper (ONP) by adding cyclodextrin during pulp formation and subsequent removal by flotation was tested using the following protocol:
[0077]Set pulper temperature to 50° C. Add 2 L water, 250 g ONP, 2 kg / ton of Huntsman flotation deinking surfactant and 2.5 kg / ton of cyclodextrin to the pulper. Mix for 10 min and transfer the slurry into a bucket with 3 L of water and stir it for 30 min at 50° C.
[0078]Add pulp slurry and 10 L water to a flotation cell (Delta 25 from Voith). Float for 5 min. By the end of the flotation make No Wash pads (NW) and determine brightness as mentioned above. The test results of the brightness evaluation are given in table 3 below.
TABLE 3BrightnessControlAlpha CDBeta CDNW Pads46.0747.0348.23Std Dev.0.060.250.12
[0079]It is evident that the addition of cyclodextrin to the flotation deinking process improved the pulp brightness. It appears that β-cyclodextrin is more effective than α-...
PUM
| Property | Measurement | Unit |
|---|---|---|
| specific gravity | aaaaa | aaaaa |
| specific gravity | aaaaa | aaaaa |
| specific gravity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More