Process for producing cellulose derivatives of high bulk density, good flowability and/or dispersibility in cold water as well as low solution color
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United States of America Patent
Stats
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May 17, 2016
Grant Date -
Aug 27, 2015
app pub date -
Sep 23, 2013
filing date -
Sep 25, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A particulate cellulose derivative is obtained in a process of grinding and drying a moist cellulose derivative which comprises the steps of A) providing a cellulose derivative having a moisture content of from 60 to 95 percent, based on the total weight of the moist cellulose derivative; B) grinding and partially drying the moist cellulose derivative in a gas-swept impact mill; C) contacting the ground and partially dried cellulose derivative with an additional amount of a drying gas outside the gas-swept impact mill; and D) subjecting the cellulose derivative to partial depolymerization after having contacted the cellulose derivative with a drying gas in step C). The obtained particulate cellulose derivative has a high untapped bulk density, a good flowability and a low color intensity.
First Claim
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Family
International Classification(s)
- 2013 Application Filing Year
- C08J Class
- 1321 Applications Filed
- 1140 Patents Issued To-Date
- 86.30 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- C08J Class
- 26.66 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 17, 2027 |
