Method of delivering a pigment dispersion and retention aid to a papermaking process
US-9200408-B2 · Dec 1, 2015 · US
Method for precipitating calcium carbonate
US9051689B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9051689-B2 |
| Application number | US-201113814413-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 16, 2011 |
| Priority date | Aug 20, 2010 |
| Publication date | Jun 9, 2015 |
| Grant date | Jun 9, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
The invention relates to a method for precipitating calcium carbonate, in which method calcium hydroxide is introduced to a fiber suspension containing cellulose-containing fibers, the calcium hydroxide is allowed to attach onto the surfaces of fibers for a pre-determined time, and the aqueous suspension of calcium hydroxide and fibers is brought into contact with carbon dioxide for precipitating the calcium carbonate. The invention also relates to a corresponding system for precipitating calcium carbonate in connection with cellulose-containing fibers. In addition, the invention relates to a fibrous product, which comprises pulp material produced by said method and comprising calcium carbonate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for precipitating calcium carbonate, comprising: introducing calcium hydroxide to a fiber suspension comprising cellulose-containing fibers to obtain an aqueous suspension of calcium hydroxide and fibers, allowing calcium hydroxide to attach onto the surfaces of fibers for at least approximately 15 minutes before bringing the aqueous suspension of calcium hydroxide and fibers into contact with carbon dioxide, and bringing the aqueous suspe…
Assignees
Inventors
Classifications
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- D21H17/675Primary
Textiles & Paper · mapped topic
- D21H17/70Primary
Textiles & Paper · mapped topic
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Frequently asked questions
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- What does patent US9051689B2 cover?
- The invention relates to a method for precipitating calcium carbonate, in which method calcium hydroxide is introduced to a fiber suspension containing cellulose-containing fibers, the calcium hydroxide is allowed to attach onto the surfaces of fibers for a pre-determined time, and the aqueous suspension of calcium hydroxide and fibers is brought into contact with carbon dioxide for precipitati…
- Who is the assignee on this patent?
- Solismaa Paivi, Upm Kymmene Corp
- What technology area does this patent fall under?
- Primary CPC classification D21H17/675. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Jun 09 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).