US795526A - Manufacture of artificial threads from solutions of cellulose. - Google Patents
Manufacture of artificial threads from solutions of cellulose. Download PDFInfo
- Publication number
- US795526A US795526A US25385805A US1905253858A US795526A US 795526 A US795526 A US 795526A US 25385805 A US25385805 A US 25385805A US 1905253858 A US1905253858 A US 1905253858A US 795526 A US795526 A US 795526A
- Authority
- US
- United States
- Prior art keywords
- cellulose
- solution
- copper
- oxid
- solutions
- 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
- 229920002678 cellulose Polymers 0.000 title description 12
- 239000001913 cellulose Substances 0.000 title description 12
- 238000004519 manufacturing process Methods 0.000 title description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 14
- 229910052802 copper Inorganic materials 0.000 description 14
- 239000010949 copper Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000835 fiber Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 229920002955 Art silk Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/006—Preparation of cuprammonium cellulose solutions
Definitions
- This process consists, broadly, in first of all producing in afirst weak bath of ammoniacal oxid of copper a swelling of the fibers and a deposit of oxid of copper upon them and in then cfi'ecting solution in a concentrated solution of ammoniacal oxid of copper. In this manner a solution is obtained the very pronounced viscosity of which is extremely advantageous for spinning.
- the solution of the cellulose is effected very efficiently if the cotton, bleached or boiled for some hours, is first of all placed, either in a dry or humid condition, in a weak bath of ammoniacal oxid. of copper, to which may be added with advantage a small quantity of caustic soda.
- This first bath serves to soften, swell, and disaggregate to some extent the fibers and to fix upon them the oxid of copper dissolved by the ammonia.
- the fibers then dissolve speedily and readily in a concentrated solution of ammoniacal oxid of copper.
- the success of the solution depends less upon the temperature than upon the other processes. Solution takes place equally well at 10 to 15 Centigrade as at a lower temperature.
- the process may be applied as follows: About seven grams of cotton freed from grease or bleached are placed in, say, one h undred and fifty to one hundred and eighty cubic centimeters of ammoniacal oxid of copper containing about twelve grams of copper and ninety grams of ammonia per liter and to which there has previously been added, say, six cubic centimeters of caustic soda at L0 to 50 Baum. After remaining for two to three hours or longer in this bath the fibrous material is removed and freed by pressure from the liquid in excess, and it is then dissolved in one hundred grams of ammoniacal oxid of copper containing, say, sixteen to eighteen grams of copper and two hundred grams of ammonia per liter. In this manner a thick solution is speedily obtained which may be diluted with water. After careful filtration this solution is ready for conversion into threads of artificial silk by an appropriate treatment.
- a process for the solution of cellulose in ammoniacal oxid of copper consisting in placing the cellulose first of all in a weak solution of ammoniacal oxid of copper and then
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
UNTTE. STATES PATENT UIRTTCE.
Specification of Letters Patent.
Patented July 25, 1905.
Application filed April 4,1905. Serial No. 253,858.
To all whom, it may concern:
Be it known that I, RUDoLF LINKMEYER, textile engineer, a subject of the Emperor of Germany, residing at Herford, in the Empire of Germany, have invented certain new and useful Improvements in the Manufacture of Artificial Threads from Solutions of Cellulose, of which the following is a specification.
It is known that artificial threads presenting the luster of silk may be produced by effecting the solution of cellulose in ammoniacal oxid of copper and in then precipitating the cellulose from its solution. Cellulose cannot, however, be readily dissolved directly in large quantities in ammoniacal oxid of copper in such a manner that the solution may present a degree of concentration sufiicient to permit of the precipitation. Solution may in certain cases require eight days. Numerous processes have already been suggested for facilitating the solution, the greater number of these processes being based upon the energetic action of fixed alkalies before the solution with a view to producing a previous dehydration of the cellulose. All these proc esses present serious defects. In particular they are complicated by the fact that the previous treatment and the solution of the cellulose must be effected with difierent chemical agents.
The process which forms the subject of the present invention obviates these defects, the preliminary treatment and dissolving the cellulose being effected with the same reagents employed in solutions only the degree of concentration of which differs.
This process consists, broadly, in first of all producing in afirst weak bath of ammoniacal oxid of copper a swelling of the fibers and a deposit of oxid of copper upon them and in then cfi'ecting solution in a concentrated solution of ammoniacal oxid of copper. In this manner a solution is obtained the very pronounced viscosity of which is extremely advantageous for spinning.
It has been found that the solution of the cellulose is effected very efficiently if the cotton, bleached or boiled for some hours, is first of all placed, either in a dry or humid condition, in a weak bath of ammoniacal oxid. of copper, to which may be added with advantage a small quantity of caustic soda. This first bath serves to soften, swell, and disaggregate to some extent the fibers and to fix upon them the oxid of copper dissolved by the ammonia. The fibers then dissolve speedily and readily in a concentrated solution of ammoniacal oxid of copper. By proceeding in this manner the conversion of the cellulose into oxycellulose or the hydration of the fibers is avoided. Further, the success of the solution depends less upon the temperature than upon the other processes. Solution takes place equally well at 10 to 15 Centigrade as at a lower temperature.
The process may be applied as follows: About seven grams of cotton freed from grease or bleached are placed in, say, one h undred and fifty to one hundred and eighty cubic centimeters of ammoniacal oxid of copper containing about twelve grams of copper and ninety grams of ammonia per liter and to which there has previously been added, say, six cubic centimeters of caustic soda at L0 to 50 Baum. After remaining for two to three hours or longer in this bath the fibrous material is removed and freed by pressure from the liquid in excess, and it is then dissolved in one hundred grams of ammoniacal oxid of copper containing, say, sixteen to eighteen grams of copper and two hundred grams of ammonia per liter. In this manner a thick solution is speedily obtained which may be diluted with water. After careful filtration this solution is ready for conversion into threads of artificial silk by an appropriate treatment.
What I claim, and desire to secure byLetters Patent of the United States, is
1. A process for the solution of cellulose in ammoniacal oxid of copper, consisting in placing the cellulose first of all in a weak solution of ammoniacal oxid of copper and then
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25385805A US795526A (en) | 1905-04-04 | 1905-04-04 | Manufacture of artificial threads from solutions of cellulose. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25385805A US795526A (en) | 1905-04-04 | 1905-04-04 | Manufacture of artificial threads from solutions of cellulose. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US795526A true US795526A (en) | 1905-07-25 |
Family
ID=2864015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US25385805A Expired - Lifetime US795526A (en) | 1905-04-04 | 1905-04-04 | Manufacture of artificial threads from solutions of cellulose. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US795526A (en) |
-
1905
- 1905-04-04 US US25385805A patent/US795526A/en not_active Expired - Lifetime
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