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FR2359848A1 - - Google Patents

Info

Publication number
FR2359848A1
FR2359848A1 FR7722981A FR7722981A FR2359848A1 FR 2359848 A1 FR2359848 A1 FR 2359848A1 FR 7722981 A FR7722981 A FR 7722981A FR 7722981 A FR7722981 A FR 7722981A FR 2359848 A1 FR2359848 A1 FR 2359848A1
Authority
FR
France
Prior art keywords
column
suspension
water vapor
cpv
degrees
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.)
Granted
Application number
FR7722981A
Other languages
French (fr)
Other versions
FR2359848B1 (en
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.)
Orica Ltd
Original Assignee
ICI Australia Ltd
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 ICI Australia Ltd filed Critical ICI Australia Ltd
Publication of FR2359848A1 publication Critical patent/FR2359848A1/fr
Application granted granted Critical
Publication of FR2359848B1 publication Critical patent/FR2359848B1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
    • B01D3/38—Steam distillation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/16—Fractionating columns in which vapour bubbles through liquid
    • B01D3/22—Fractionating columns in which vapour bubbles through liquid with horizontal sieve plates or grids; Construction of sieve plates or grids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/16—Fractionating columns in which vapour bubbles through liquid
    • B01D3/22—Fractionating columns in which vapour bubbles through liquid with horizontal sieve plates or grids; Construction of sieve plates or grids
    • B01D3/225—Dual-flow sieve trays
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00—Post-polymerisation treatments
    • C08F6/001—Removal of residual monomers by physical means
    • C08F6/003—Removal of residual monomers by physical means from polymer solutions, suspensions, dispersions or emulsions without recovery of the polymer therefrom

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

L'invention décrit un procédé de purification du chlorure de polyvinyle (CPV). On fait passer une suspension aqueuse de particules de CPV dans une colonne sensiblement verticale, munie d'une série de plaques horizontales perforées sans déversoirs; la suspension est introduite vers le sommet de la colonne et la vapeur d'eau vers le bas de la colonne, de façon à permettre le suintement de la suspension à travers les perforations en luttant contre le courant de vapeur d'eau sans engorger la colonne (température de la suspension dans la colonne : 90 degrés C-150 degrés C; durée médiane de séjour des particules : 1 à 20 minutes; demi-écart interquartile de la durée de séjour des particules : < 5 minutes); on retire du bas de la colonne la suspension strippée et du haut de cette colonne la vapeur d'eau et le chlorure de vinyle monomère. Le procédé est notamment applicable à du CPV particulaire obtenu par polymérisation en suspension.The invention describes a process for purifying polyvinyl chloride (CPV). An aqueous suspension of CPV particles is passed through a substantially vertical column provided with a series of perforated horizontal plates without overflows; the suspension is introduced towards the top of the column and the water vapor towards the bottom of the column, so as to allow the suspension to seep through the perforations while combating the current of water vapor without clogging the column (temperature of the suspension in the column: 90 degrees C-150 degrees C; median particle residence time: 1 to 20 minutes; interquartile half range of particle residence time: <5 minutes); the stripped suspension is removed from the bottom of the column and the water vapor and the monomeric vinyl chloride from the top of this column. The process is particularly applicable to particulate PVC obtained by suspension polymerization.

FR7722981A 1976-07-27 1977-07-26 PROCESS FOR REMOVING VINYL CHLORIDE MONOMER FROM A VINYL CHLORIDE POLYMER Expired FR2359848B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPC678276 1976-07-27
AUPC707576 1976-08-19

Publications (2)

Publication Number Publication Date
FR2359848A1 true FR2359848A1 (en) 1978-02-24
FR2359848B1 FR2359848B1 (en) 1982-08-06

Family

ID=25642135

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7722981A Expired FR2359848B1 (en) 1976-07-27 1977-07-26 PROCESS FOR REMOVING VINYL CHLORIDE MONOMER FROM A VINYL CHLORIDE POLYMER

Country Status (9)

Country Link
JP (1) JPS5334888A (en)
DE (1) DE2733679A1 (en)
ES (1) ES461073A1 (en)
FR (1) FR2359848B1 (en)
GB (1) GB1580225A (en)
IT (1) IT1143747B (en)
NL (1) NL7708168A (en)
NZ (1) NZ184661A (en)
SE (1) SE438861B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022158A1 (en) * 1979-07-10 1981-01-14 Chemische Werke Hüls Ag Column having trays with inclined apertures

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5246813U (en) * 1976-09-21 1977-04-02
US4228273A (en) * 1978-09-05 1980-10-14 Tenneco Chemicals, Inc. Process for the removal of vinyl chloride from aqueous dispersions of vinyl chloride resins
JPS5622305A (en) * 1979-08-01 1981-03-02 Chisso Corp Monomer removal from vinyl chloride resin slurry by steaming and apparatus therefor
JPS63317306A (en) * 1987-06-19 1988-12-26 Chisso Corp Low polymerization degree vinyl chloride polymer powder with small amount of residual vinyl chloride monomer and its preparation
EP1641836A1 (en) * 2003-07-03 2006-04-05 Vinnolit GmbH &amp; Co. KG Plate column for the separation of monomeric vinyl chloride (vcm) from polyvinyl chloride (pvc) in the suspension process

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713478A (en) * 1952-10-03 1955-07-19 Edw G Ragatz Co Apparatus for counter-current contacting of liquids and vapors
GB802148A (en) * 1954-07-15 1958-10-01 Dunlop Rubber Co Process and apparatus for distillation
GB994789A (en) * 1960-10-01 1965-06-10 Basf Ag Process and apparatus for the continuous polymerisation of ethylenically unsaturatedpolymerisable compounds
US3926927A (en) * 1974-11-25 1975-12-16 Monsanto Co Stripping monomers from a slurry of copolymerized acrylonitrile
FR2311037A1 (en) * 1975-05-16 1976-12-10 Hoechst Ag PROCESS FOR THE CONTINUOUS ELIMINATION OF MONOMERS CONTAINED IN AQUEOUS DISPERSIONS OF POLYMERS
FR2346377A1 (en) * 1976-04-03 1977-10-28 Shinetsu Chemical Co PROCESS AND PLANT FOR THE REMOVAL OF UNPROCESSED VINYL CHLORIDE IN PVC

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713478A (en) * 1952-10-03 1955-07-19 Edw G Ragatz Co Apparatus for counter-current contacting of liquids and vapors
GB802148A (en) * 1954-07-15 1958-10-01 Dunlop Rubber Co Process and apparatus for distillation
GB994789A (en) * 1960-10-01 1965-06-10 Basf Ag Process and apparatus for the continuous polymerisation of ethylenically unsaturatedpolymerisable compounds
US3926927A (en) * 1974-11-25 1975-12-16 Monsanto Co Stripping monomers from a slurry of copolymerized acrylonitrile
FR2311037A1 (en) * 1975-05-16 1976-12-10 Hoechst Ag PROCESS FOR THE CONTINUOUS ELIMINATION OF MONOMERS CONTAINED IN AQUEOUS DISPERSIONS OF POLYMERS
FR2346377A1 (en) * 1976-04-03 1977-10-28 Shinetsu Chemical Co PROCESS AND PLANT FOR THE REMOVAL OF UNPROCESSED VINYL CHLORIDE IN PVC

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022158A1 (en) * 1979-07-10 1981-01-14 Chemische Werke Hüls Ag Column having trays with inclined apertures

Also Published As

Publication number Publication date
FR2359848B1 (en) 1982-08-06
SE438861B (en) 1985-05-13
SE7708564L (en) 1978-01-28
GB1580225A (en) 1980-11-26
NZ184661A (en) 1979-08-31
IT1143747B (en) 1986-10-22
JPS5334888A (en) 1978-03-31
DE2733679A1 (en) 1978-02-02
NL7708168A (en) 1978-01-31
ES461073A1 (en) 1978-12-01

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