GB1418115A - Hollow cellulose ester filaments and their production - Google Patents

Hollow cellulose ester filaments and their production

Info

Publication number
GB1418115A
GB1418115A GB3628473A GB3628473A GB1418115A GB 1418115 A GB1418115 A GB 1418115A GB 3628473 A GB3628473 A GB 3628473A GB 3628473 A GB3628473 A GB 3628473A GB 1418115 A GB1418115 A GB 1418115A
Authority
GB
United Kingdom
Prior art keywords
reverse osmosis
ppm
filaments
production
rejection
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
Application number
GB3628473A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monsanto Co
Original Assignee
Monsanto Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US00058509A external-priority patent/US3724672A/en
Application filed by Monsanto Co filed Critical Monsanto Co
Publication of GB1418115A publication Critical patent/GB1418115A/en
Expired legal-status Critical Current

Links

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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/08—Hollow fibre membranes
    • 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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Artificial Filaments (AREA)

Abstract

1418115 Reverse osmosis MONSANTO CO 31 July 1973 [1 Aug 1972] 36284/73 Addition to 1305330 Heading B1X [Also in Division B5] A reverse osmosis membrane comprises hollow filaments of cellulose esters, e.g. cellulose acetate filaments wherein the density. gradient in the filament wall structure is characterised by haying an intrinsic permeability of at least 204 1. per sq. m. of membrane surface per 24 hours and a solids rejection of at least 90% when processing an aqueous solution containing 2000 ppm of a salt of a divalent metal at ambient temperatures and under a hydrostatic pressure of 7.03 kg/cm<SP>2</SP>, the product water being discharged at atmospheric pressure. In reverse osmosis tests, using water containing 2000 ppm of dissolved magnesium sulphate, 98% rejection is shown under the above conditions.
GB3628473A 1970-07-27 1973-07-31 Hollow cellulose ester filaments and their production Expired GB1418115A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00058509A US3724672A (en) 1970-07-27 1970-07-27 Asymmetric hollow fiber membranes and method of fabrication
US27698372A 1972-08-01 1972-08-01

Publications (1)

Publication Number Publication Date
GB1418115A true GB1418115A (en) 1975-12-17

Family

ID=26737694

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3628473A Expired GB1418115A (en) 1970-07-27 1973-07-31 Hollow cellulose ester filaments and their production

Country Status (3)

Country Link
AT (1) AT321247B (en)
AU (1) AU462468B2 (en)
GB (1) GB1418115A (en)

Also Published As

Publication number Publication date
AU3162471A (en) 1973-02-01
AT321247B (en) 1975-03-25
AU462468B2 (en) 1975-06-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee