EP0153182A2
Expired / Lapsed
EP
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Process for producing finely divided cellulose particles
Assignee: Akita Jujo Chemicals Co Ltd
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Filing: 1985-02-19
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Granted: —
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Expires: 2005-02-19
Abstract
Abstract Finely divided cellulose particles of uniform size can be produced in high yield by applying pressure and heat to cellulose fibers in a hydrous condition and then discharging them explosively into a receiver tank at atmospheric pressure. The size of the finely divided cellulose particles can be controlled by varying the conditions under which pressure and heat are applied to the cellulose fibers.
Inventors
- 👤 Takayoshi Higuchi
- 👤 Kingo Yokota
- 👤 Mitsuhiko Tanahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 04:11
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21B1/30; D21B1/36
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
A process for producing finely divided cellulose particles which comprises the steps of enclosing substantially lignin-free cellulose fibers in a pressure vessel, applying pressure and heat to said cellulose fibers in a hydrous condition, and then discharging said cellulose fibers explosively into a receiver tank at atmospheric pressure and thereby reducing said cellulose fibers to fine particles.
Claim 2
Dependent Claim
57 words
A process for producing finely divided cellulose particles which comprises the steps of enclosing substantially lignin-free cellulose fibers in a pressure vessel, applying pressure and heat to said cellulose fibers in a hydrous condition, and then discharging said cellulose fibers explosively into a receiver tank at atmospheric pressure and thereby reducing said cellulose fibers to fine particles.
Claim 3
Dependent Claim
57 words
A process as claimed in claim 1 wherein said substantially lignin-free cellulose fibers comprise chemical pulp for paper-making use, chemical pulp for dissolving use, or cotton fibers, these materials being obtained by subjecting a fibrous material selected from the group consisting of wood fibers, bast fibers and seed fibers to a treatment for the removal of lignin.
Claim 4
Dependent Claim
30 words
A process as claimed in claim 1 wherein said step of applying pressure and heat to said cellulose fibers in a hydrous condition is carried out using pressurized saturated steam.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 3 wherein said pressurized saturated steam has a gauge pressure of 5 to 30 kg/cm 2 .
References Cited (Backward Citations)
No citation records indexed.
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