US3007919A - Continuous viscose degasification - Google Patents
Continuous viscose degasification Download PDFInfo
- Publication number
- US3007919A US3007919A US844553A US84455359A US3007919A US 3007919 A US3007919 A US 3007919A US 844553 A US844553 A US 844553A US 84455359 A US84455359 A US 84455359A US 3007919 A US3007919 A US 3007919A
- Authority
- US
- United States
- Prior art keywords
- viscose
- chamber
- deaerator
- boiling
- degasification
- 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
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/103—De-aerating
Definitions
- the present invention therefore has for its primary object, the provision of an improved method for deaerating viscose in a dead-end system.
- a further object of the invention is to provide an effective dead-end viscose supply system whereby viscose delivered to a spinneret has a gas content not exceeding approximately .002% by volume.
- a further object of the invention is to provide a twostep deaeration method for viscose.
- a further object of the invention is to provide a viscose supply apparatus having a secondary venting chamber between a primary deaerator and a spinning machine.
- the dead-end viscose supply system of the present invention includes delivery lines 1 and 2 which supply viscose from conventional aging tanks (not shown) to a primary deaerator 3.
- the deaerator 3 is maintained in an evacuated condition by a 3,007,919 Patented Nov. 7, i961 vacuum line 4 connected to an upper chamber 5 so as to induce a boiling of the viscose as it passes downwardly along the inside surfaces of the deaerator Walls in the form of a thin film.
- the apparatus thus far described may, in general, be of the same arrangement as disclosed in the patent to Copeland referred to above.
- the deaerated viscose collects at the bottom of the deaerator 3 and is continuously delivered, while still in a boiling condition, to a degasifying chamber 6 by means of a pump '7.
- the degasifying chamber 6 is provided with an inlet pipe 8 which extends beneath the normal level of liquid in the chamber 6, as indicated by the character 9, and also includes an agitator 10 which is driven at a slow speed by a motor 11.
- the end of the inlet pipe 8 is bent at 12 to direct the viscose around the inner periphery of the chamber 6 along a generally horizontal plane.
- the primary function of the agitator 10 is to impart movement to the viscose to thereby prevent channeling of viscose from the inlet pipe 8 to the chamber outlet conduit 13 and also to avoid any tendency for the viscose to vortex.
- the degasification chamber 6 is opened to the atmosphere by a vent 14 so that the boiling viscose delivered into chamber 6 is subjected only to atmospheric pressure.
- the viscose is maintained within the chamber 6 until its boiling has stopped, and it is during this stage that residual air or gases are released to the atmosphere through the vent 14 to thus provide a viscose which is highly satisfactory for spinning purposes.
- the deaerated or degasified viscose is delivered to a spinning machine, indicated at 15, after being forced through filters 16 and 17 by a pump 18, in accordance with conventional practices.
- a method of deaerating viscose prior to extrusion including the steps of subjecting the viscose to a high vacuum in a first chamber whereby the viscose is caused to boil and a major portion of the entrapped gas bubbles are evacuated therefrom, continuously transferring the viscose to a second chamber While the viscose is still in a boiling condition, subjecting the viscose to atmospheric pressure within said second chamber whereby residual gases are free to escape from the viscose and into the atmosphere, maintained the viscose in said second chamber until boiling of the viscose stops, and delivering the viscose directly from said second chamber to an extrusion machine.
- a process for the production of extruded regenerated cellulose products comprising subjecting a supply of viscose to an aging treatment, continuously passing the aged viscose to an evacuated zone whereby the viscose is caused to boil and a major portion of the entrained gas bubbles are released from the viscose, continuously pumping the boiling viscose to a second zone which is at substantially atmospheric pressure, introducing the boiling viscose into said second zone at a point below the surface of the viscose contained therein, agitating the viscose in the second zone sufficiently to prevent channeling of the same between the inlet and outlet of the second zone, maintaining the viscose in the second zone until boiling of the viscose stops, and continually delivering the deaerated viscose from said second zone to an extrusion machine.
- Apparatus for degasifying viscose supplied to an extrusion machine including a primary high vacuum deaerator, means for supplying aged viscose to said vacuum deaerator wherein it assumes a boiling condition and a major portion of entrapped gases are released therefrom, a secondary deaerating chamber, means for delivering viscose from said primary deaerator to said secondary deaerating chamber, a vent in said secondary deaerating chamber open to the atmosphere whereby viscose is subjected to atmospheric pressure Within said secondary chamber, and means for delivering viscose from said secondary chamber directly to an extrusion machine Without recirculation thereof.
- Apparatus as defined in claim 3 further including agitating means within said secondary chamber for effecting movement of viscoseto prevent channeling of the same between the inlet and outlet thereof.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US844553A US3007919A (en) | 1959-10-05 | 1959-10-05 | Continuous viscose degasification |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US844553A US3007919A (en) | 1959-10-05 | 1959-10-05 | Continuous viscose degasification |
Publications (1)
Publication Number | Publication Date |
---|---|
US3007919A true US3007919A (en) | 1961-11-07 |
Family
ID=25293041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US844553A Expired - Lifetime US3007919A (en) | 1959-10-05 | 1959-10-05 | Continuous viscose degasification |
Country Status (1)
Country | Link |
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US (1) | US3007919A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3229445A (en) * | 1961-06-21 | 1966-01-18 | Automatic Process Control Inc | Method and apparatus for continuously degassing a liquid |
US3373152A (en) * | 1964-11-23 | 1968-03-12 | Fmc Corp | Method of degassing viscose |
US4333315A (en) * | 1981-05-04 | 1982-06-08 | General Foods Corporation | Process for preparing a gasified ice product |
US4343630A (en) * | 1978-05-09 | 1982-08-10 | Spikeville Limited | Liquid de-gassing unit |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US277615A (en) * | 1883-05-15 | Machine foe foeming s-taeles | ||
GB209439A (en) * | 1922-07-07 | 1924-01-07 | Signal Gmbh | Apparatus for removing gases from liquids |
US1876755A (en) * | 1931-05-01 | 1932-09-13 | Chemical Holding Corp | Process of preparing viscose |
US1910058A (en) * | 1931-06-12 | 1933-05-23 | Rca Corp | Cascade superregenerative circuits |
US2183763A (en) * | 1938-09-23 | 1939-12-19 | Brown Davis | Slip deaerator |
US2355057A (en) * | 1941-07-18 | 1944-08-08 | Du Pont | Apparatus for deaerating viscose compositions |
US2578568A (en) * | 1947-11-01 | 1951-12-11 | Albert C Mayer | Gas-liquid separator |
GB722877A (en) * | 1952-02-12 | 1955-02-02 | Commercial Radio Sound Corp | Improvements in audible and visual two-way communication and annunciation system forhospitals and the like |
GB726805A (en) * | 1951-10-04 | 1955-03-23 | Nyma Kunstzijdespinnerij Nv | Improvements in or relating to the deaeration of viscose |
-
1959
- 1959-10-05 US US844553A patent/US3007919A/en not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US277615A (en) * | 1883-05-15 | Machine foe foeming s-taeles | ||
GB209439A (en) * | 1922-07-07 | 1924-01-07 | Signal Gmbh | Apparatus for removing gases from liquids |
US1876755A (en) * | 1931-05-01 | 1932-09-13 | Chemical Holding Corp | Process of preparing viscose |
US1910058A (en) * | 1931-06-12 | 1933-05-23 | Rca Corp | Cascade superregenerative circuits |
US2183763A (en) * | 1938-09-23 | 1939-12-19 | Brown Davis | Slip deaerator |
US2355057A (en) * | 1941-07-18 | 1944-08-08 | Du Pont | Apparatus for deaerating viscose compositions |
US2578568A (en) * | 1947-11-01 | 1951-12-11 | Albert C Mayer | Gas-liquid separator |
GB726805A (en) * | 1951-10-04 | 1955-03-23 | Nyma Kunstzijdespinnerij Nv | Improvements in or relating to the deaeration of viscose |
GB722877A (en) * | 1952-02-12 | 1955-02-02 | Commercial Radio Sound Corp | Improvements in audible and visual two-way communication and annunciation system forhospitals and the like |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3229445A (en) * | 1961-06-21 | 1966-01-18 | Automatic Process Control Inc | Method and apparatus for continuously degassing a liquid |
US3373152A (en) * | 1964-11-23 | 1968-03-12 | Fmc Corp | Method of degassing viscose |
US4343630A (en) * | 1978-05-09 | 1982-08-10 | Spikeville Limited | Liquid de-gassing unit |
US4333315A (en) * | 1981-05-04 | 1982-06-08 | General Foods Corporation | Process for preparing a gasified ice product |
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Owner name: JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY JOHN HA Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: BALBOA INSURANCE COMPANY C/O THE PAUL REVERE EQUIT Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: NEW ENGLAND MUTUAL LIFE INSURANCE COMPANY 501 BOYL Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: KELLOGG CREDIT CORPORATION A DE CORP. Free format text: AGREEMENT WHEREBY SAID HELLER AND RAYONIER RELEASES ALL MORTGAGES AND SECURITY INTERESTS HELD BY AVTEX ON APRIL 28, 1978, AND JAN. 11, 1979, RESPECTIVELY AND ASSIGNS ITS ENTIRE INTEREST IN SAID MORT-AGAGE AGREEMENT TO ASSIGNEE;ASSIGNORS:WALTER E. HELLER & COMPANY, INC. A NY CORP.;ITT RAYONIER INCORPORATED, A DE CORP.;AVTEX FIBERS INC., A NY CORP.;REEL/FRAME:003959/0350 Effective date: 19800326 Owner name: WESTERN AND SOUTHERN LIFE INSURANCE COMPANY THE C/ Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: WALTER E. HELLER & COMPANY, INC., A CORP. OF DEL. Free format text: AGREEMENT WHEREBY AETNA RELEASES AVTEX FROM ALL MORTAGES AND SECURITY INTERESTS IN SAID INVENTIONS AS OF JANUARY 11,1979, AND ASSIGNS TO ASSIGNEE THE ENTIRE INTEREST IN SAID MORTAGE AGREEMENT TO ASSIGNEE;ASSIGNORS:AETNA BUSINESS CREDIT, INC., A CORP. OF N.Y.;AVTEX FIBERS, INC, A CORP. OF NY;KELLOGG CREDIT CORP., A CORP. OF DEL.;REEL/FRAME:003959/0250 Effective date: 19800326 Owner name: PAUL REVERE LIFE INSURANCE COMPANY THE C/O THE PAU Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: PROVIDENT ALLIANCE LIFE INSURANCE COMPANY C/O THE Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 |