GB1107860A - Extracting low molecular weight material from polyamides - Google Patents

Extracting low molecular weight material from polyamides

Info

Publication number
GB1107860A
GB1107860A GB3260965A GB3260965A GB1107860A GB 1107860 A GB1107860 A GB 1107860A GB 3260965 A GB3260965 A GB 3260965A GB 3260965 A GB3260965 A GB 3260965A GB 1107860 A GB1107860 A GB 1107860A
Authority
GB
United Kingdom
Prior art keywords
polymer
solvent
column
raised
molecular weight
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
GB3260965A
Inventor
Hermann Linge
Werner Nieswandt
Eberhard Schaefer
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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
Application filed by BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB1107860A publication Critical patent/GB1107860A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/02—Solvent extraction of solids
    • B01D11/0203—Solvent extraction of solids with a supercritical fluid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/46—Post-polymerisation treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyamides (AREA)
  • Extraction Or Liquid Replacement (AREA)

Abstract

<PICT:1107860/C3/1> Low molecular weight constituents are extracted from a polylactam composition by passing a solvent downward through the composition in particle form at elevated temperature. The polymer which may be in the form of flakes or granules may be derived by polymerization of an o -amino-carboxylic acid or an amide forming derivative thereof. Suitable solvents are those of lower S.G. than the polymer and extractible material e.g. water, MeOH, EtOH and PriOH. The process may be carried out at 70-120 DEG C. and may be continuous, the polymer being raised in counter-current to the falling solvent. In Example (1) the solvent is allowed to flow down a stationary column of polycaprolactam. In Example (2) the apparatus of Fig. 2 is used. Solvent is run down the column and the polymer is raised by removing containers of treated polymer from the top of the column and replacing them by fresh ones inserted at the bottom. In Example (3) the solvent is run down a column of polymer which is raised by supplying fresh polymer at the bottom with a screw feeder and removing treated polymer from the top.
GB3260965A 1964-07-31 1965-07-30 Extracting low molecular weight material from polyamides Expired GB1107860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0077911 1964-07-31

Publications (1)

Publication Number Publication Date
GB1107860A true GB1107860A (en) 1968-03-27

Family

ID=6979651

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3260965A Expired GB1107860A (en) 1964-07-31 1965-07-30 Extracting low molecular weight material from polyamides

Country Status (4)

Country Link
CH (1) CH452895A (en)
DE (1) DE1495187A1 (en)
GB (1) GB1107860A (en)
NL (1) NL6509652A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025278A1 (en) * 1980-07-01 1982-01-21 Siemens AG, 1000 Berlin und 8000 München RAIL-MOUNTED ELECTRIC MOTOR VEHICLE

Also Published As

Publication number Publication date
CH452895A (en) 1968-03-15
DE1495187A1 (en) 1969-03-13
NL6509652A (en) 1966-02-01

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