NL7208697A - Polymer deposit removal - from reactor wall by contacting with alkaline soln and treating mechanically - Google Patents

Polymer deposit removal - from reactor wall by contacting with alkaline soln and treating mechanically

Info

Publication number
NL7208697A
NL7208697A NL7208697A NL7208697A NL7208697A NL 7208697 A NL7208697 A NL 7208697A NL 7208697 A NL7208697 A NL 7208697A NL 7208697 A NL7208697 A NL 7208697A NL 7208697 A NL7208697 A NL 7208697A
Authority
NL
Netherlands
Prior art keywords
alkaline soln
contacting
deposit
reactor wall
polymsn
Prior art date
Application number
NL7208697A
Other versions
NL153554B (en
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 filed Critical
Priority to NL7208697A priority Critical patent/NL153554B/en
Publication of NL7208697A publication Critical patent/NL7208697A/en
Publication of NL153554B publication Critical patent/NL153554B/en

Links

Classifications

    • 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
    • C08F2/00—Processes of polymerisation
    • C08F2/002—Scale prevention in a polymerisation reactor or its auxiliary parts
    • C08F2/004—Scale prevention in a polymerisation reactor or its auxiliary parts by a prior coating on the reactor walls
    • 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
    • C08F2/00—Processes of polymerisation
    • C08F2/008—Processes of polymerisation cleaning reaction vessels using chemicals

Landscapes

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

Abstract

Deposits formed on the inner wall of a polymsn. reactor or other appts. during the polymsn. of an ethylenically unsatd. monomer are removed by mechanical treatment, after or during the contacting of the deposit with an alkaline soln. Specif. the deposit is formed during the (co)polymsn. of vinyl chloride. The alkaline soln. contains sodium, potassium, calcium or ammonium hydroxide or sodium caronate. The concn. of the alkaline soln. is >=0.5 esp. 1-50 wt.%. The deposit is sprayed with the alkaline soln. at 5-50 degrees C. After contacting with the alkaline soln., the deposit is sprayed with a water jet at a pressure of 5 kg/cm2. Practically complete removal of deposits in a short time without damaging the reactor wall. Low cost.
NL7208697A 1972-06-23 1972-06-23 METHOD OF REMOVING A DEPOSIT. NL153554B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7208697A NL153554B (en) 1972-06-23 1972-06-23 METHOD OF REMOVING A DEPOSIT.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7208697A NL153554B (en) 1972-06-23 1972-06-23 METHOD OF REMOVING A DEPOSIT.

Publications (2)

Publication Number Publication Date
NL7208697A true NL7208697A (en) 1973-12-27
NL153554B NL153554B (en) 1977-06-15

Family

ID=19816351

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7208697A NL153554B (en) 1972-06-23 1972-06-23 METHOD OF REMOVING A DEPOSIT.

Country Status (1)

Country Link
NL (1) NL153554B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997020645A1 (en) * 1995-12-01 1997-06-12 Unilever N.V. Method for washing bottles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997020645A1 (en) * 1995-12-01 1997-06-12 Unilever N.V. Method for washing bottles
US5858105A (en) * 1995-12-01 1999-01-12 Diversey Lever, Inc. Method for washing plastic returnable beverage bottles with alkaline solution and ultrasonic energy

Also Published As

Publication number Publication date
NL153554B (en) 1977-06-15

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Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee
NL80 Abbreviated name of patent owner mentioned of already nullified patent

Owner name: SUMITOMO