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

Silica sol, preparation equipment and method of silica sol and application of silica sol in papermaking

一种设备、反应容器的技术，应用在胶态二氧化硅领域，达到改进保留和排水性能、提高生产效率、低S-值的效果

Active Publication Date: 2015-09-30
ECOLAB USA INC
View PDF22 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, while many multi-component procedures exist to improve retention and drainage in papermaking, there is still a need for new procedures to improve retention and drainage, especially in the faster and larger paper machines that are being built

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
  • Silica sol, preparation equipment and method of silica sol and application of silica sol in papermaking
  • Silica sol, preparation equipment and method of silica sol and application of silica sol in papermaking
  • Silica sol, preparation equipment and method of silica sol and application of silica sol in papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2

[0114] By adding 4.36 g of 15% sulfuric acid to 100 g of colloidal silica (N8699, available from Nalco Chemical Company) to provide a mixture with a pH value of 9.0, and then aging the mixture at room temperature for 30 and 60 minutes to prepare activated colloidal silica #1 and #2. Samples of the activated colloidal silica #1 and #2 were analyzed and the results are shown in Table 1 below. For comparison, the results for colloidal silica 32K (aluminum modified silica sol, available from EKA Nobel, AB) and colloidal silica N8699 are also listed.

[0115] Table 1

[0116] Example number

-

-

1

2

colloidal silica

32K

N8699

#1

#2

Specific surface area, m 2 / g

633

780

/

/

pH

9.49

10.77

9.00

9.00

SiO 2 %

8.48

14.90

14.2

14.2

S-value, %

24.1

35.4

20.4

16.7

[0117]The retention properties of these colloidal silicas were evaluated on ...

Embodiment 3 and 4

[0124] By adding 4.36 g of 14.83% dilute sulfuric acid to 100 g of colloidal silica (N8699, available from Nalco Chemical Company) to provide a mixture with a pH value of 9.04, and then aging the mixture at room temperature for 39 and 43 minutes to prepare activated colloidal silica #3 and #4. A summary of the activated colloidal silica #3 and #4 is shown in Table 3 below. A summary of colloidal silica NP580 (silica sol, available from EKA Nobel, AB) and colloidal silica N8699 is also given in Table 3 for comparison.

[0125] table 3

[0126] Example number

-

-

3

4

colloidal silica

NP580

N8699

#3

#4

Specific surface area, m 2 / g

1090

780

/

/

pH

10.84

10.69

9.04

9.04

SiO 2 %

15.35

14.73

14.08

14.08

S-value, %

35.1

32.9

17.2

15.9

[0127] The retention properties of these colloidal silicas were evaluated on DFR-05 (available fro...

Embodiment 5

[0134] By adding 18.77g of 5% dilute sulfuric acid to 100g of SiO with 14.88% 2 content of colloidal silica (N8699, available from Nalco Chemical Company) to provide a mixture with a pH value of 9.00, and then age the mixture at room temperature for 60 and 120 minutes, respectively, to prepare activated colloidal Silica #5 and #6. The S-values ​​of the samples of the activated colloidal silica #5 and #6 were measured and the results are shown in Table 5 below.

[0135] table 5

[0136]

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The present invention relates to colloidal silicas having a low S-value and a high solids content, the preparation thereof, and the use thereof in the production of paper. When used in the production of paper, the colloidal silicas of the invention exhibit good retention and drainage performance so that they can be used in lower amounts compared to conventional colloidal silicas. The present invention also relates to an apparatus and a method for producing such activated colloidal silicas.

Description

field of invention [0001] The present invention relates to colloidal silicas with low S-values ​​and high solids content, their preparation and their use in paper production. When used in paper production, the colloidal silicas of the present invention exhibit good retention and drainage properties, so that they can be used in lower amounts than conventional colloidal silicas. The present invention also relates to apparatus and methods for preparing said activated colloidal silica. Background technique [0002] Colloidal silica (also known as silica sol or silica hydrosol) is an aqueous system containing very small silica particles. These systems are used in various fields especially depending on the particle size. In the production of paper, silica-based sols containing very small, colloidal, anionic silica particles have been increasingly used in the last two decades. Colloidal silica is hereby combined with cationic or amphoteric polymers as an additive for raw material...

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 Applications(China)
IPC IPC(8): D21H17/69D21H17/68
CPCC01B33/14D21H17/68C09C1/3045C09C1/3063C01B33/146B01J13/00D21H11/02D21H21/10
Inventor 白雯徐健吴佳陈跖
Owner ECOLAB USA INC
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