US2222050A - Viscose low in hemicellulose - Google Patents
Viscose low in hemicellulose Download PDFInfo
- Publication number
- US2222050A US2222050A US236216A US23621638A US2222050A US 2222050 A US2222050 A US 2222050A US 236216 A US236216 A US 236216A US 23621638 A US23621638 A US 23621638A US 2222050 A US2222050 A US 2222050A
- Authority
- US
- United States
- Prior art keywords
- cellulose
- alkali
- weight
- sodium hydroxide
- alkali 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
- 229920000297 Rayon Polymers 0.000 title description 32
- 229920002488 Hemicellulose Polymers 0.000 title description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 263
- 229920002678 cellulose Polymers 0.000 description 105
- 235000010980 cellulose Nutrition 0.000 description 105
- 239000003513 alkali Substances 0.000 description 99
- 239000001913 cellulose Substances 0.000 description 98
- 235000011121 sodium hydroxide Nutrition 0.000 description 95
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 30
- 238000003825 pressing Methods 0.000 description 28
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 23
- 239000012991 xanthate Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 20
- 229920002955 Art silk Polymers 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- 238000005517 mercerization Methods 0.000 description 2
- 230000005070 ripening Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 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
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
Definitions
- This invention relates to a process of producing viscose which is poor in hemicellulose and solid artificial structures made thereof.
- cellulose the same are wetted or made to a paste or dough, for example, by spraying and stirring the mass, with a limited quantity of dilute caustic soda solution of about 8-12% strength which is relatively poor in hemicellulose.
- dilute caustic soda solution of about 8-12% strength which is relatively poor in hemicellulose.
- the press-cake is broken up again and the disintegratedmaterial is made to a dough or paste with a limited quantity of mercerizing lye of, for example, 18 to 22% alkali content and of one to three times the weight of the press-cake and stirred, allowed to act for one to several hours and again squeezed out in a closed press toassume, for instance, 2.6 to 3 times the weight of the original cellulose.
- the alkali cellulose is again disintegrated and then subjected to the sulphiding process so as to be converted into viscose, in the manner known per se.
- a lye may be used which is particularly pure, or particularly poor in hemicellulose.
- the pressing may be advantageously carried out under a very high pressure whereby, as has been found, the subsequent readjustment or rectification by means of mercerizing lye is facilitated. Also it has been found that the press lye which has been squeezed out under the last and highest pressure in one and the same pressing operation, removes the highest quantity of hemicellulose from the compressed mass. In this manner a very effective purification of the alkali cellulose can be attained.
- the quantities of very pure lye required for the last operation are comparatively small as there are only limited quantities to be wetted or to be made to a dough and this lye is used entirely or partly for wetting or making a paste in the last step but one of the process, after the squeezing operation, and then used in earlier steps of the process and finally, in an impure state, for steeping the cellulose.
- Example 300 kgs. of ordinary alkali cellulose crumbs ripened for 20 hours at a temperature of 20 C. and containing about 11% hemicellulose per total amount of cellulose are made to a dough with 600 kgs. of soda lye of 9% strength containing about 0.2% hemicellulose and after two hours squeezed out in a closed press to assume a weight of 280 kgs.
- the alkali cellulose crumbs which have been purified preliminarily are loosened in a suitable disintegrating apparatus and made to a dough with 550 kgs. of mercerizing lye of 21% NaOH and 0.1% hernicellulose, left to diifusion for two hours, and then squeezed out to assume a weight of 2'70 kgs.
- the alkali cellulose is then loosened up again and sulphided; the xanthate is dissolved to a viscose of 6.5% celluloseand 8% alkali content.
- the spinning solution of relatively high viscosity is filtered, de-aerated, left untouched for a certain period of time, if necessary, and then spun in the manner known per se with a considerable draft, which is admissible with viscose of this kind.
- a silk of high strength in dry and wet state and of good elontening by spraying, etc., or kneading of the alkali cellulose is obtained.
- a viscose solution which comprises moistening one part by weight of an alkali cellulose selected from the group consisting of unripened alkali celluloses and ripened alkali celluloses with about one to three parts by weight of a sodium hydroxide solution containing about 8 to 12% by weight of NaOH, partly removing said 812% sodium hydroxide solution from said alkali cellulose by pressing, remoistening the pressed alkali cellulose with a second sodium hydroxide solution containing at least 18% by weight of NaOI-I, partly removing said second sodium hydroxide solution by pressing to form a fluffy alkali cellulose, sulfidizing said fiuffy alkali cellulose with carbon bisulfide to form a cellulose Xanthate and finally dissolving said xanthate in an alkali to form a viscose solution.
- an alkali cellulose selected from the group consisting of unripened alkali celluloses and ripened alkali celluloses with about
- a viscose solution which comprises moistening one part by weight of an unripened alkali cellulose with about one to three parts by weight of a sodium hydroxide solution containing about 8 to 12% by weight of NaOI-I, partly removing said 812% sodium hydroxide solution from said alkali cellulose by pressing, remoistening the pressed alkali cellulose with a second sodium hydroxide solution containing at least 18% by Weight of NaOH, partly removing said second sodium hydroxide solution by pressing to form a fiufiy alkali cellulose, sulfidizing said flufiy alkali cellulose with carbon bisulfide to form a cellulose xanthate and finally dissolving said xanthate in an alkali to form a viscose solution.
- a viscose solution which comprises moistening one part of a ripened alkali cellulose with about one to three parts by weight of sodium hydroxide solution containing about 8 to 12% by weight of NaOH, partly removing said 8 to 12% sodium hydroxide solution from said alkali cellulose by pressing, re-moistening the pressed alkali cellulose with a second sodium hydroxide solution containing at least 18% by weight of NaOI-I, partly removing said second sodium hydroxide solution by pressing to form a fiuffy alkali cellulose, sulfidizing said fluffy alkali cellulose with carbon bisulfide to form a cellulose xanthate and finally dissolving said xanthate in an alkali to form a viscose solution.
- a viscose solution which comprises moistening one part by weight of an alkali cellulose selected from the group consisting of unripened alkali celluloses and ripened alkali celluloses with about one to three parts by weight of a sodium hydroxide solution containing about 8 to 12% by weight of NaOI-I, partly removing said 8 to 12% sodium hydroxide solution from said alkali cellulose by pressing, remoistening the pressed alkali cellulose with said sodium hydroxide solution, partly removing said 8 to 12% sodium hydroxide solution by pressing, re-moistening the pressed alkali cellulose with a sodium hydroxide solution containing at least 18% by weight of NaOI-I, partly removing this sodium hydroxide solution by pressing to form a fluffy alkali cellulose, sufidizing said fluffy alkali cellulose with carbon bisulfide to form a cellulose xanthate and finally dissolving said xanthate in an alkali to form a viscose solution
- a viscose solution which comprises moistening one part by Weight of an unripened alkali cellulose with about one to three parts by weight of a sodium hydroxide solution containing about 8 to 12% by weight of NaOH, partly removing said 8 to 12% sodium hydroxide solution from said alkali cellulose by pressing, re-moistening the pressed alkali cellulose with said sodium hydroxide solution, partly removing said 8 to 12% sodium hydroxide solution by pressing, re-moistening the pressed alkali cellulose with a sodium hydroxide solution containing at least 18% by weight of NaOH, partly removing this sodium hydroxide solution by pressing to form a fiuffy alkali cellulose, sulfidizing said flufify alkali cellulose with carbon bisulfide to form a cellulose xanthate and finally dissolving said xanthate in an alkali to form a viscose solution.
- a viscose solution which comprises moistening one part by weight of a ripened alkali cellulose with about one to three parts by weight of a sodium hydroxide solution containing about 8 to 12% by weight of NaOH, partly removing said 8 to 12% sodium hydroxide solution from said alkali cellulose by pressing, re-mostening the pressed alkali cellulose with said sodium hydroxide solution, partly removing said 8 to 12% sodium hydroxide solution by pressing, re-moistening the pressed alkali cellulose with a sodium hydroxide solution containing at least 18% by weight of NaOH, partly removing this sodium hydroxide solution by pressing to form a flufiy alkali cellulose, sulfidizing said fiufiy alkali cellulose with carbon bisulfide to form a cellulose xanthate and finally dissolving said xanthate in an alkali to form a viscose solution.
- a viscose solutiOn which comprises moistening one part by Weight of an alkali cellulose selected from the group consisting of unripened alkali celluloses and ripened alkali celluloses with about one to three parts by weight .of a sodium hydroxide solution containing about 8 to 12% by weight of NaOH for at least one hour, partly removing said 8 to 12% sodium hydroxide solution from said alkali cellulose by pressing, re-moistening the pressed alkali cellulose With a second sodium hydroxide solution containing at least 18% by weight of NaOH, partly removing said second sodium hydroxide solution by pressing to form a fluffy alkali cellulose, sulfidizing said fiufiy alkali cellulose with carbon bisulfide to form a cellulose xanthate and finally dissolving said xanthate in an alkali to form a viscose solution.
- an alkali cellulose selected from the group consisting of unripened alkali celluloses and
- a viscose solution which comprises moistening one part by weight of an unripened alkali cellulose with about one to three parts by weight of a sodium hydroxide solution containing about 8 to 12% by weight of NaOH for at least one hour, partly removing said 8 to 12% sodium hydroxide solution from said alkali cellulose by pressing, re-moistening the pressed alkali cellulose with a second sodium hydroxide solution containing at least 18% by weight of NaOH, partly removing said second sodium hydroxide solution by pressing to form a flufiy alkali cellulose, sulfidizing said fiufiy alkali cellulose with carbon bisulfide to form a cellulose xanthate and finally dissolving said xanthate in an alkali to form a viscose solution.
- a viscose solution which comprises moistening one part by weight of a ripened alkali cellulose with about one to three parts by weight of a sodium hydroxide solution containing about 8 to 12% by weight of NaOH for at least'one hour, partly removing said 8 to 12% sodium hydroxide solution from said alkali cellulose by pressing, re-moistening the pressed alkali cellulose with a second sodium hydroxide solution containing at least 18% by weight of NaOH, partly removing said second sodium hydroxide solution by pressing to form a fluffy alkali cellulose, sulfidizing said fiufiy alkali cellulose with carbon bisulfide to form a cellulose xanthate and finally dissolving said xanthate in an alkali to form a viscose solution.
- a viscose solution of which comprises moistening one part by weight of a ripened alkali cellulose with about one to three parts by weight of a sodium hydroxide solution containing about 8 to 12% by weight of NaOH, partly removing said 8 to 12% sodium hydroxide solution from said alkali cellulose by pressing, re-moistening the pressed alkali cellulose with a second sodium hydroxide solution containing at least 18% by weight of NaOH, partly removing said second sodium hydroxide solution from said alkali cellulose by pressing to form a fiuffy alkali cellulose, sulfidizing said flufiy alkali cellulose with carbon bisulfide to form a cellulose xanthate and finally dissolving said xanthate in an alkali to form a viscose solution, said removing of said 8 to 12% sodium hydroxide solution from said alkali cellulose by pressing being carried out at a higher pressure than said removal of said second sodium hydroxide solution from
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Artificial Filaments (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE508172X | 1937-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2222050A true US2222050A (en) | 1940-11-19 |
Family
ID=6546914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US236216A Expired - Lifetime US2222050A (en) | 1937-10-23 | 1938-10-21 | Viscose low in hemicellulose |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2222050A (en, 2012) |
| GB (1) | GB508172A (en, 2012) |
| NL (1) | NL50391C (en, 2012) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481693A (en) * | 1944-04-29 | 1949-09-13 | Rayonier Inc | Raw cotton for conversion into rayon |
| US2495235A (en) * | 1943-12-27 | 1950-01-24 | Const Mecaniques De Stains Soc | Method of preparing viscose |
| US2539437A (en) * | 1947-05-09 | 1951-01-30 | American Viscose Corp | Method of producing viscose |
| US2647114A (en) * | 1949-05-07 | 1953-07-28 | Phrix Werke Ag | Method for making readily filterable viscose |
| US2648661A (en) * | 1950-02-03 | 1953-08-11 | American Viscose Corp | Method and apparatus for producing viscose |
| US3057037A (en) * | 1958-04-17 | 1962-10-09 | American Viscose Corp | Compression resistant rayon staple |
| WO2013164598A1 (en) * | 2012-05-02 | 2013-11-07 | Innovia Films Limited | Process |
-
1938
- 1938-10-05 NL NL90048A patent/NL50391C/xx active
- 1938-10-21 US US236216A patent/US2222050A/en not_active Expired - Lifetime
- 1938-10-22 GB GB30611/38A patent/GB508172A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2495235A (en) * | 1943-12-27 | 1950-01-24 | Const Mecaniques De Stains Soc | Method of preparing viscose |
| US2481693A (en) * | 1944-04-29 | 1949-09-13 | Rayonier Inc | Raw cotton for conversion into rayon |
| US2539437A (en) * | 1947-05-09 | 1951-01-30 | American Viscose Corp | Method of producing viscose |
| US2647114A (en) * | 1949-05-07 | 1953-07-28 | Phrix Werke Ag | Method for making readily filterable viscose |
| US2648661A (en) * | 1950-02-03 | 1953-08-11 | American Viscose Corp | Method and apparatus for producing viscose |
| US3057037A (en) * | 1958-04-17 | 1962-10-09 | American Viscose Corp | Compression resistant rayon staple |
| WO2013164598A1 (en) * | 2012-05-02 | 2013-11-07 | Innovia Films Limited | Process |
| CN104321347A (zh) * | 2012-05-02 | 2015-01-28 | 伊诺维亚薄膜有限公司 | 方法 |
| JP2015517582A (ja) * | 2012-05-02 | 2015-06-22 | イノヴィア フィルムズ リミテッド | 方法 |
| US9493581B2 (en) | 2012-05-02 | 2016-11-15 | Innovia Films Limited | Process for the manufacture of viscose |
Also Published As
| Publication number | Publication date |
|---|---|
| NL50391C (en, 2012) | 1941-05-15 |
| GB508172A (en) | 1939-06-27 |
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