US922340A - Manufacture of objects from cellulose acetate. - Google Patents
Manufacture of objects from cellulose acetate. Download PDFInfo
- Publication number
- US922340A US922340A US48295009A US1909482950A US922340A US 922340 A US922340 A US 922340A US 48295009 A US48295009 A US 48295009A US 1909482950 A US1909482950 A US 1909482950A US 922340 A US922340 A US 922340A
- Authority
- US
- United States
- Prior art keywords
- cellulose acetate
- objects
- manufacture
- formic acid
- cellulose
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/08—Polysaccharides
- B01D71/12—Cellulose derivatives
- B01D71/14—Esters of organic acids
Definitions
- formic acid a solvent for cellulose acetate which overcomes all the objections mentioned and provides a commercially successful process.
- a solvent formic acid at least equals the expensive solvents abovementioned and is much superior to glacial acetic acid.
- the formic acid solution is not at all sensitive to the presence of water and can stand a large percentage without being unfavorably affected.
- formic acid is very volatile and 1s readily decomposed, so that it may be used in practically all the industrial processes in which a cellulose-acetate solution may be employed, for instance, for producing coatings, impregnations and all sorts of solids, especially textile fibers.
- a suitable solution may be readily made in accordance with the present invention by adding dry cellulose acetate to formic acid and stirrin until the acetate-is dissolved. But the soIution may be produced equally wellby substituting formic acidfor acetic acid, for instance, as a diluent or solvent in any of the known processes for the acetylization of cellulose (hydro,-, oxy-, cellulose etc), by means of acetic anhydrid in the presence of sulfuric acid or other stimulant.
- a formic acid solution containing a v certain quantity of acetic acid is directly obtained in the acetylizing process. It follows-from this that one or more other diluting agents, may be mixed with the formic acid as, circumstances or desired effect may require. Similarly any other appropriate ingredients may of course be used for softening the products to be made of the solution or for any other purpose Whatever.
Description
UNITED STATES PATENT OFFICE.
ALBERT SCHLOSS, OF STETTIN, GERMANY, AS SIGNOR TO FURST GUIDO DONNERS MAROKSOHE KUNSTSEIDEN & ACETATWERKE, OF SYDOWSANE, NEAR STETTIN, I
GERMANY.
MANUFACTURE OF OBJECTS FROM CELLULOSE ACETATE.
Specification of Letters Patent. Application filed March 12, 1909. Serial No. 482,950.
Patented May 18, 1909.
To all whom it may concern:
Be it known that I, ALBERT SoHLoss, a subject of the King of Prussia, residing in Stettin, Prussia, Germany, have invented certain new and useful Improvements in the Manufacture of Objects from Cellulose Acetate.
reasons, of which perhaps the most important is the fact that the solutions are very sensitive to the'presenceof watera very small proportion of the latter being sufficient to render the solutions useless by partially precipitating the cellulose-acetate.
have discovered in formic acid a solvent for cellulose acetate which overcomes all the objections mentioned and provides a commercially successful process. As a solvent formic acid at least equals the expensive solvents abovementioned and is much superior to glacial acetic acid. Furthermore the formic acid solution is not at all sensitive to the presence of water and can stand a large percentage without being unfavorably affected. Furthermore. formic acid is very volatile and 1s readily decomposed, so that it may be used in practically all the industrial processes in which a cellulose-acetate solution may be employed, for instance, for producing coatings, impregnations and all sorts of solids, especially textile fibers.
' 'An unexpected and marked advantage'in the use of formic acid as a solvent has been discovered, namely that a thread (i the spmning process, for example) of su cient strength is at once. produced when thelsolution 15 squirted into an aqueous, recipitating bath of suitable character. T tion in the resent case is believed to be due to the fact t at the skin formed upon the surface of the The solvents now generally used in the e rapid acfilament as-soon as it enters the preclpltating bath is readily penetrated by.
orxmc acid and water, so that thecoagulation process rapidly extends into the interior of the thread thus imparting the necessary strength almost at once. Filaments so spun may be subsequently twisted, reeled and submitted to any appropriate treatment.
In point of economy the present formic acid process is the e ual of any of the others, since the formic acid used may be recovered readily as acetic acid. Furthermore, the initial cost is slight, inasmuch as formic acid is low ricedand indeed by recently developed processes, it may be obtained at even less expense than acetic acid.
A suitable solution may be readily made in accordance with the present invention by adding dry cellulose acetate to formic acid and stirrin until the acetate-is dissolved. But the soIution may be produced equally wellby substituting formic acidfor acetic acid, for instance, as a diluent or solvent in any of the known processes for the acetylization of cellulose (hydro,-, oxy-, cellulose etc), by means of acetic anhydrid in the presence of sulfuric acid or other stimulant.
Thus a formic acid solution containing a v certain quantity of acetic acid, is directly obtained in the acetylizing process. It follows-from this that one or more other diluting agents, may be mixed with the formic acid as, circumstances or desired effect may require. Similarly any other appropriate ingredients may of course be used for softening the products to be made of the solution or for any other purpose Whatever.
I claim as my invention:
. 1. In the manufacture of objects from cellulose acetate, the subjection of the cellulose acetate to the action of formic acid as a solvent, substantially as described.
2. In the manufacture of objects from cellulose acetate, the subjection of the cellulose acetate to the action of formic acid as a solvent and the introduction of the solution so formed into an aqueous recipitating bath, substantially as describetil In testimony whereof I have signed my name to this specification, two subscribing Witnesses.
ALBERT SCHLOSS.
- Witnesses:
P. ERSBAOH, W. MANSHE.
in the presence of 1 00
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US48295009A US922340A (en) | 1909-03-12 | 1909-03-12 | Manufacture of objects from cellulose acetate. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US48295009A US922340A (en) | 1909-03-12 | 1909-03-12 | Manufacture of objects from cellulose acetate. |
Publications (1)
Publication Number | Publication Date |
---|---|
US922340A true US922340A (en) | 1909-05-18 |
Family
ID=2990772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US48295009A Expired - Lifetime US922340A (en) | 1909-03-12 | 1909-03-12 | Manufacture of objects from cellulose acetate. |
Country Status (1)
Country | Link |
---|---|
US (1) | US922340A (en) |
-
1909
- 1909-03-12 US US48295009A patent/US922340A/en not_active Expired - Lifetime
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2616869A (en) | Spinning solutions of vinyl chloride polymer in a solvent mixture of tetrahydrofurane and a nitrile | |
US2432447A (en) | Color removal from acrylonitrile polymers | |
US922340A (en) | Manufacture of objects from cellulose acetate. | |
GB1111952A (en) | New compositions of carbon black and polyacrylonitrile and method for their preparation | |
US2388325A (en) | Spinning process for artificial filaments | |
US2179544A (en) | Production of artificial materials | |
US1930803A (en) | Manufacture of artificial filaments | |
US1546211A (en) | Manufacture of products containing cellulose | |
US2041958A (en) | Refining cellulose fiber for conversion into cellulose derivatives | |
GB1027132A (en) | Method for the production of acrylonitrile fibers and filaments | |
GB403106A (en) | Improvements in or relating to the production and treatment of artificial filaments,threads, ribbons and the like | |
US2172447A (en) | Increasing the reactivity of cellulose to esterification reagents | |
GB618633A (en) | Improvements in the manufacture of viscose articles, for example, artificial filaments | |
US2810162A (en) | Process for preparing shaped articles of cellulose | |
US2462933A (en) | Process for manufacturing artificial fiber from proteins contained in cotton seed | |
US2105543A (en) | Noncorrosive organic derivatives of cellulose | |
US792888A (en) | Process of manufacturing filaments from viscose. | |
DE528042C (en) | Process for the production of high viscosity pulps | |
US1709513A (en) | Process of forming cellulose products | |
GB190917036A (en) | An Improved Process for Producing Cellulose Formate. | |
US1030251A (en) | Process for producing cellulose products. | |
US1471513A (en) | Manufacture of viscose silk | |
US2250929A (en) | Manufacture of improved filaments, threads, foils, or sheets of cellulose esters or ethers | |
US1073891A (en) | Process of manufacturing artificial lustrous threads, bands, and filaments. | |
DE822001C (en) | Process for the production of artificial moldings having cavities from acid-resistant high polymers and / or chlorine-containing polymerized substances |