Enhanced catalyst stability for alkaline detergent formulations
US-2015361385-A1 · Dec 17, 2015 · US
Method for improving brightness in bleached pulp
US9068293B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9068293-B2 |
| Application number | US-201313851884-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 27, 2013 |
| Priority date | Sep 19, 2005 |
| Publication date | Jun 30, 2015 |
| Grant date | Jun 30, 2015 |
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- Title
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Abstract
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The invention is directed towards methods and compositions for processes based on the combination of organic peroxyacids and ammonium salts that preserve and enhance the response to optical brighteners (fluorescent whitening dyes), brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The composition and method improve response to optical brighteners (fluorescent whitening dyes), maintain and/or enhance brightness and enhance the performance of paper products. Used in combination with optical brighteners the described agents produce a synergistic effect not previously identified in the paper process.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of preparing a bleached pulp material containing an optical brightener having enhanced brightness comprising: contacting bleached pulp material with an optical brightener, making a paper sheet out of the bleached pulp material, and contacting the paper sheet with a composition, the composition comprising an effective amount of an organic peroxy acid in a mixture with ammonium salt at pH 4-9 the ammonium salt having an ammonium portion ionically…
Assignees
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Classifications
Textiles & Paper · mapped topic
Textiles & Paper · mapped topic
Textiles & Paper · mapped topic
- D21H21/32Primary
Textiles & Paper · mapped topic
- D21C9/1084Primary
Textiles & Paper · mapped topic
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Frequently asked questions
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- What does patent US9068293B2 cover?
- The invention is directed towards methods and compositions for processes based on the combination of organic peroxyacids and ammonium salts that preserve and enhance the response to optical brighteners (fluorescent whitening dyes), brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The composition and method improve resp…
- Who is the assignee on this patent?
- Nalco Co
- What technology area does this patent fall under?
- Primary CPC classification D21H21/32. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Jun 30 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).