GB959840A - Process and apparatus for the precipitation of cellulose esters in granular form - Google Patents
Process and apparatus for the precipitation of cellulose esters in granular formInfo
- Publication number
- GB959840A GB959840A GB4394560A GB4394560A GB959840A GB 959840 A GB959840 A GB 959840A GB 4394560 A GB4394560 A GB 4394560A GB 4394560 A GB4394560 A GB 4394560A GB 959840 A GB959840 A GB 959840A
- Authority
- GB
- United Kingdom
- Prior art keywords
- precipitant
- pict
- cellulose ester
- cellulose
- stream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920002678 cellulose Polymers 0.000 title abstract 9
- 238000001556 precipitation Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 6
- 239000002244 precipitate Substances 0.000 abstract 3
- 239000004215 Carbon black (E152) Substances 0.000 abstract 2
- 125000001931 aliphatic group Chemical group 0.000 abstract 2
- 239000008187 granular material Substances 0.000 abstract 2
- 229930195733 hydrocarbon Natural products 0.000 abstract 2
- -1 hydrocarbon chlorides Chemical class 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- DQEFEBPAPFSJLV-UHFFFAOYSA-N Cellulose propionate Chemical compound CCC(=O)OCC1OC(OC(=O)CC)C(OC(=O)CC)C(OC(=O)CC)C1OC1C(OC(=O)CC)C(OC(=O)CC)C(OC(=O)CC)C(COC(=O)CC)O1 DQEFEBPAPFSJLV-UHFFFAOYSA-N 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 229920002301 cellulose acetate Polymers 0.000 abstract 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 abstract 1
- 229920006218 cellulose propionate Polymers 0.000 abstract 1
- 239000003085 diluting agent Substances 0.000 abstract 1
- 150000002148 esters Chemical class 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B17/00—Apparatus for esterification or etherification of cellulose
- C08B17/02—Apparatus for esterification or etherification of cellulose for making organic esters of cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B3/00—Preparation of cellulose esters of organic acids
- C08B3/08—Preparation of cellulose esters of organic acids of monobasic organic acids with three or more carbon atoms, e.g. propionate or butyrate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B3/00—Preparation of cellulose esters of organic acids
- C08B3/22—Post-esterification treatments, including purification
- C08B3/26—Isolation of the cellulose ester
- C08B3/28—Isolation of the cellulose ester by precipitation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
<PICT:0959840/C3/1> <PICT:0959840/C3/2> <PICT:0959840/C3/3> <PICT:0959840/C3/4> <PICT:0959840/C3/5> <PICT:0959840/C3/6> Lower aliphatic esters of cellulose are precipitated from solutions thereof in the form of spheroidal granules by extruding a solution of the cellulose ester whose viscosity at the extrusion temperature is 500-20,000 poises through orifices in a solid surface into a stream of an aqueous precipitant for the ester, the stream flowing in a gyratory path across the solid surface. The liquid component of the solution consists of 0-10% by weight of one or more volatile hydrocarbon chlorides, at most 40% by weight of water, and the remainder one or more water-soluble lower aliphatic acids. The cellulose ester may be a cellulose acetate made by a process in which acetic acid alone or acetic acid and a volatile hydrocarbon chloride is employed as a diluent. The cellulose ester may be cellulose propionate or cellulose acetate butyrate. The granules of precipitated cellulose ester formed may be allowed to remain in contact with the precipitant for a time. The used precipitant may be diluted to precipitate residual cellulose ester material dissolved therein after having been separated from the cellulose ester precipitate previously formed. It may then be separated from the second precipitate, reconstituted and recycled to the main precipitation zone. As shown in Figs. 1 to 6, forms of apparatus in which the precipitation may be effected comprise a tubular or annular member 21 for extruding the cellulose ester solution into the stream of precipitant, the member being closed at its lower end 23 and being provided with a number of orifices 24 in its side wall. A tubular member 22 coaxial with and spaced from the member, 21 to form therewith a duct of annular cross-section communicates with a precipitant inlet pipe 25 and is provided with an opening 26 through which the suspension of granular precipitate in the precipitant is discharged. The top 27 of the member 22 is closed. The precipitant inlet pipe 25 is tangentially disposed with respect to the tubular or basin-shaped member 22 so that a gyratory motion is imparted to the stream of precipitant flowing through the duct between the members 21 and 22.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4098359 | 1959-12-28 | ||
| JP1048060 | 1960-03-31 | ||
| JP1048160 | 1960-03-31 | ||
| JP1048260 | 1960-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB959840A true GB959840A (en) | 1964-06-03 |
Family
ID=27455400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4394560A Expired GB959840A (en) | 1959-12-28 | 1960-12-21 | Process and apparatus for the precipitation of cellulose esters in granular form |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT238725B (en) |
| DE (1) | DE1443166B2 (en) |
| GB (1) | GB959840A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999055774A1 (en) * | 1998-04-24 | 1999-11-04 | Eastman Chemical Company | Coprecipitation of cellulose esters with functional additives and compositions thus obtainable |
-
1960
- 1960-12-21 GB GB4394560A patent/GB959840A/en not_active Expired
- 1960-12-28 DE DE19601443166 patent/DE1443166B2/en active Pending
- 1960-12-28 AT AT975560A patent/AT238725B/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999055774A1 (en) * | 1998-04-24 | 1999-11-04 | Eastman Chemical Company | Coprecipitation of cellulose esters with functional additives and compositions thus obtainable |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1443166B2 (en) | 1974-06-06 |
| DE1443166A1 (en) | 1968-10-24 |
| AT238725B (en) | 1965-02-25 |
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