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

Method for increasing the advantages of starch in pulped cellulosic material in the production of paper and paperboard

一种纤维素物质、纸板的技术，应用在造纸、增强剂添加、非纤维浆添加等方向，能够解决协议目标问题、助长化学需氧量、降低机生产率等问题

Active Publication Date: 2013-06-26
SOLENIS TECH CAYMAN
View PDF19 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These reasons lead to starch precipitation, so that in order to achieve the target strength, it is necessary to strengthen the microbial control mechanism and increase the use of new internal or surface starch, which can even reduce the machine productivity.
Biological oxygen demand contributes to chemical oxygen demand and poses problems in meeting agreement targets for wastewater treatment plants

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
  • Method for increasing the advantages of starch in pulped cellulosic material in the production of paper and paperboard
  • Method for increasing the advantages of starch in pulped cellulosic material in the production of paper and paperboard
  • Method for increasing the advantages of starch in pulped cellulosic material in the production of paper and paperboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0480] The following experiments were carried out at various commercial papermaking installations throughout Europe. Examples 1 and 4 were carried out in a closed system, and the remaining examples were carried out in an open system. The starting material for each example was 100% recycled paper.

[0481] The following table 4 summarizes the dosage and feeding point of the following biocides and polymers:

[0482] Table 4:

[0483]

[0484] CEPI-Confederation of European Paper Industries

[0485] For comparison purposes, it must be noted that the usual dosage of ammonium bromide biocide is 0.005 to 0.008% Cl 2 Active matter per ton of paper produced, ie the dose used in the experiments according to the invention was 2 to 10 times higher than the conventional dose.

example 1

[0486] Example 1 - Using Setup A (Experiments show the use of (a) Polymer Aid, but no Biocide or Polymer A; (b) Polymer Aid A and Biocide, but no Polymer A; and (c) polymer additive A, biocide, and the effect of polymer A on microbial degradation and starch fixation on cellulose):

[0487] The following experiments investigate the positive effect of using the biocides according to the invention in combination with cationic polymers.

[0488] The biocide used is (a) 35% NH prepared in situ according to European patent EP-A517102, European patent EP785908, European patent EP1293482 and European patent EP1734009 4 Br and 13% NaOCl, as an inorganic biocide; and (b) bronopol / 5-chloro-2-methyl-2H-isothiazolin-3-one / 2-methyl.2H-isothiazoline -3-ketone (BNPD / Iso) is a two-component oxidizing biocide composed of organic biocides.

[0489] The cationic polymer used is a copolymer consisting of acrylamide (about 69 mole-%) and quaternized N.N-dimethylaminopropyl acrylamide (DIMAPA-Quat...

Embodiment 2

[0498] Example 2 - using setting A (experiments show the use of various doses of polymer A, and fixed doses of polymer additive A and biocide, on the impact of fixed starch, turbidity, and drainage):

[0499] The following experiments used the biocide and the cationic polymer according to Example 1 in the paper production process as follows:

[0500] In the beating step, a thick stock of recycled pulp consisting of European Paper Union Standard 1.04 or 4.01 with a consistency of 35 to 45 g / l was used, treated with a biocide to prevent starch degradation.

[0501] Then add the polymer A and the polymer auxiliary agent A to the thick slurry of the recycled pulp, and then mix with the pulp to simulate the addition of the pulp chest. Dilute the sample with tap water or white water to form a thin slurry with a consistency of 7 to 9 g / l. Then add the standard retention aid program, and then put the sample into the vacuum drainage test (VDT) device or DFR device (DFR=Drainage Freene...

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

No PUM Login to View More

Abstract

The invention relates to a method for increasing the benefit from starch in pulped, preferably repulped cellulosic material at paper or paperboard manufacturing comprising the steps of (a) pulping a cellulosic material containing a starch; (b) treating the cellulosic material containing the starch with one or more biocides, preferably in the thick stock area; and (h) adding an ionic polymer and preferably, an auxiliary ionic polymer to the cellulosic material; wherein the ionic polymer and the optionally added auxiliary ionic polymer preferably have a different average molecular weight and preferably a different ionicity, wherein the tonicity Is the molar content of ionic monomer units relative to the total amount of monomer units.

Description

technical field [0001] The present invention relates to a method for the manufacture of paper or board using beaten cellulosic matter, preferably recycled pulp. The method enhances the predominance of starch in pulped cellulosic matter, preferably recycled pulp, in the manufacture of paper and board. The method is carried out by (a) beating the starch-containing cellulosic material, (b) treating the starch-containing cellulosic material with one or more biocides (biocides), and treating the treated area with a thickened The pulp region is preferred, and (h) adding an ionic polymer to the cellulosic material, preferably an auxiliary ionic polymer; wherein the added ionic polymer and the optionally added auxiliary ionic polymer have different average molecular weights Preferably, it is preferred to have different ionic properties, wherein the ionic properties are the molar content of ionic monomer units compared to the overall monomer units. Background technique [0002] Pap...

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): D21H17/28
CPCD21H17/28D21H17/37D21H17/375D21H17/44D21H21/18D21H21/36D21H17/25D21H17/72
Inventor L·克拉普什C·J·麦克格雷格尔J·V·马拉尔德拉瓦伦德
Owner SOLENIS TECH CAYMAN
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