GB679203A - Improvements in and relating to the production of cellulose acetate threads - Google Patents
Improvements in and relating to the production of cellulose acetate threadsInfo
- Publication number
- GB679203A GB679203A GB28163/49A GB2816349A GB679203A GB 679203 A GB679203 A GB 679203A GB 28163/49 A GB28163/49 A GB 28163/49A GB 2816349 A GB2816349 A GB 2816349A GB 679203 A GB679203 A GB 679203A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potassium acetate
- bath
- acetic acid
- withdrawn
- acetate
- 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
- 229920002301 cellulose acetate Polymers 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 21
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 abstract 20
- 235000011056 potassium acetate Nutrition 0.000 abstract 10
- 150000001875 compounds Chemical class 0.000 abstract 5
- 239000012452 mother liquor Substances 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 2
- 230000001112 coagulating effect Effects 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
- D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
In the production of cellulose acetate threads by extruding an aqueous acetic acid solution of cellulose acetate into an aqueous coagulating bath containing potassium acetate and acetic acid, the excess acetic acid accumulating in the bath is recovered by withdrawing part of the bath either continuously or intermittently, cooling to precipitate a double compound of acetic acid and potassium acetate from the withdrawn bath and heating the double compound to dissociate it substantially into acetic acid and potassium acetate. Preferably, prior to the precipitation, solid potassium acetate is added to the withdrawn bath to ensure that all the acetic acid will be removed, and the mixture is then heated to dissolve the acetate. The double compound is separated from the mother liquor and heated at atmospheric pressure and 120-297 DEG C. to distil off the acid, or heated in a closed vessel at 200-250 DEG C. and then injected into a chamber containing air at reduced pressure and fitted with a condenser wherein the acid is condensed. The chamber may contain heated rollers on to which the molten compound is run, the potassium acetate then being collected on the rollers. The recovered potassium acetate is added to a succeeding portion of withdrawn bath. The mother liquor is divided into two portions, the first portion containing acetic acid and potassium acetate being returned to the coagulating bath to maintain its concentration constant. The second portion is evaporated to yield a further portion of potassium acetate for addition to a succeeding portion of the withdrawn bath. The cyclic process may be effected with two vessels which function alternately as the mixer in which solid potassium acetate is added to the withdrawn bath and as the evaporator in which evaporation of the second portion of the mother liquor is effected, in which case the potassium acetate recovered by heating the double compound is also added to the evaporator. Specifications 281,827, [Class 2 (iii)], and 652,844 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES0195174A ES195174A1 (en) | 1949-11-03 | 1950-11-02 | IMPROVEMENTS IN THE OBTAINING OF CELLULOSE ACETATE YARNS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB279590X | 1948-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB679203A true GB679203A (en) | 1952-09-17 |
Family
ID=10268015
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30524/48A Expired GB652844A (en) | 1948-11-24 | 1948-11-24 | Improvements in and relating to the production of artificial threads, fibres, filaments, staple fibres and the like |
| GB28163/49A Expired GB679203A (en) | 1948-11-24 | 1949-11-03 | Improvements in and relating to the production of cellulose acetate threads |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30524/48A Expired GB652844A (en) | 1948-11-24 | 1948-11-24 | Improvements in and relating to the production of artificial threads, fibres, filaments, staple fibres and the like |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2632686A (en) |
| BE (2) | BE492232A (en) |
| CH (2) | CH279590A (en) |
| DE (2) | DE937970C (en) |
| FR (2) | FR1000334A (en) |
| GB (2) | GB652844A (en) |
| NL (2) | NL70801C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1008824B (en) * | 1953-05-13 | 1957-05-23 | Max Braun Fa | Ignition device for electric flashlight device with gas discharge tube |
| US3342921A (en) * | 1966-03-16 | 1967-09-19 | West Virginia Pulp & Paper Co | Process for producing fibrous filler having high wet end retention |
| DE4302055C1 (en) * | 1993-01-26 | 1994-03-24 | Rhodia Ag Rhone Poulenc | Cellulose acetate filaments prepd. by spinning from an acetone soln. - are useful for the prodn. of cigarette filter tow |
| US5662773A (en) * | 1995-01-19 | 1997-09-02 | Eastman Chemical Company | Process for preparation of cellulose acetate filters for use in paper making |
| US5705631A (en) * | 1995-12-15 | 1998-01-06 | Eastman Chemical Company | Laminar flow process of preparing cellulose diacetate fibers |
| US6184373B1 (en) | 1999-09-03 | 2001-02-06 | Eastman Chemical Company | Method for preparing cellulose acetate fibers |
| US20040214702A1 (en) * | 2003-04-25 | 2004-10-28 | Stroud Herbert D. | Process for the conversion of cellulose acetate waste fibers into a suitable form for paper production and the resultant paper products |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2147641A (en) * | 1928-11-05 | 1939-02-21 | Celanese Corp | Production of artificial filaments, films, and like materials |
| NL46526C (en) * | 1937-01-19 | |||
| US2341586A (en) * | 1941-08-07 | 1944-02-15 | Du Pont | Wet spinning of cellulose acetate |
-
1948
- 1948-11-24 GB GB30524/48A patent/GB652844A/en not_active Expired
-
1949
- 1949-10-24 NL NL140499A patent/NL70801C/xx active
- 1949-11-03 GB GB28163/49A patent/GB679203A/en not_active Expired
- 1949-11-17 BE BE492232D patent/BE492232A/xx unknown
- 1949-11-22 DE DEC186A patent/DE937970C/en not_active Expired
- 1949-11-23 CH CH279590D patent/CH279590A/en unknown
- 1949-11-24 FR FR1000334D patent/FR1000334A/en not_active Expired
-
1950
- 1950-10-25 DE DEC3317A patent/DE939107C/en not_active Expired
- 1950-10-27 NL NL156883A patent/NL72012C/xx active
- 1950-10-31 CH CH290225D patent/CH290225A/en unknown
- 1950-11-02 BE BE499117D patent/BE499117A/xx unknown
- 1950-11-03 FR FR1028931D patent/FR1028931A/en not_active Expired
-
1951
- 1951-05-11 US US225915A patent/US2632686A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL70801C (en) | 1952-09-15 |
| GB652844A (en) | 1951-05-02 |
| DE939107C (en) | 1956-02-16 |
| FR1000334A (en) | 1952-02-11 |
| CH279590A (en) | 1951-12-15 |
| CH290225A (en) | 1953-04-30 |
| US2632686A (en) | 1953-03-24 |
| FR1028931A (en) | 1953-05-28 |
| BE499117A (en) | 1951-03-01 |
| NL72012C (en) | 1953-03-16 |
| BE492232A (en) | 1949-12-15 |
| DE937970C (en) | 1956-01-19 |
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