GB783073A - Process for the regeneration of monomers starting from a polymethacrylate, and more especially from methyl polymethacrylate - Google Patents

Process for the regeneration of monomers starting from a polymethacrylate, and more especially from methyl polymethacrylate

Info

Publication number
GB783073A
GB783073A GB21771/53A GB2177153A GB783073A GB 783073 A GB783073 A GB 783073A GB 21771/53 A GB21771/53 A GB 21771/53A GB 2177153 A GB2177153 A GB 2177153A GB 783073 A GB783073 A GB 783073A
Authority
GB
United Kingdom
Prior art keywords
polymethacrylate
bath
temperature
metal
heating
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
GB21771/53A
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.)
ESTEBAN DOMINGO SEGUI
Original Assignee
ESTEBAN DOMINGO SEGUI
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 ESTEBAN DOMINGO SEGUI filed Critical ESTEBAN DOMINGO SEGUI
Publication of GB783073A publication Critical patent/GB783073A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
    • C07C67/333—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A monomer of a polymethacrylate is obtained by heating the polymer, preferably in small pieces, to a temperature which will cause depolymerization by heating in a bath of molten metal at a temperature of 450 DEG to 500 DEG C., said metal having its boiling-point sufficiently above the temperature of the bath to ensure that there is no formation or very little formation of the vapour of the metal. Suitable metals for the bath are molten lead, bismuth, cadmium, tin, rubidium, selenium, tellurium, thallium, and zinc or alloys of these metals with each other or with metals such as aluminium, antimony and magnesium. Specification 783,074, [Group IV (b)], is referred to.ALSO:A monomer of a polymethacrylate is obtained by heating the polymer, e.g. methyl polymethacrylate, in a bath of molten metal at a temperature of 450 DEG to 500 DEG C., the liquid metal having its boiling point sufficiently above the temperature of the bath to ensure that there is no, or very little, formation of the vapour of the metal at the temperature of the bath. Baths of molten lead, bismuth, cadmium, tin, rubidium, selenium, tellurium, thallium, zinc, sodium or of alloys of these may be used. Preferably the polymethacrylate is used in the form of small pieces. The apparatus in which the process is carried out forms the subject-matter of Specification 783,074.
GB21771/53A 1953-03-23 1953-08-06 Process for the regeneration of monomers starting from a polymethacrylate, and more especially from methyl polymethacrylate Expired GB783073A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR783073X 1953-03-23

Publications (1)

Publication Number Publication Date
GB783073A true GB783073A (en) 1957-09-18

Family

ID=9214292

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21771/53A Expired GB783073A (en) 1953-03-23 1953-08-06 Process for the regeneration of monomers starting from a polymethacrylate, and more especially from methyl polymethacrylate

Country Status (1)

Country Link
GB (1) GB783073A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010070325A1 (en) * 2008-12-18 2010-06-24 Lucite International Uk Limited Methyl methacrylate purification process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010070325A1 (en) * 2008-12-18 2010-06-24 Lucite International Uk Limited Methyl methacrylate purification process
CN102256926A (en) * 2008-12-18 2011-11-23 卢西特国际英国有限公司 Methyl methacrylate purification process
RU2523228C2 (en) * 2008-12-18 2014-07-20 ЛУСАЙТ ИНТЕРНЭШНЛ ЮКей ЛИМИТЕД Method of methyl methacrylate purification
CN102256926B (en) * 2008-12-18 2014-11-05 卢西特国际英国有限公司 Methyl methacrylate purification process
US8907121B2 (en) 2008-12-18 2014-12-09 Lucite International Uk Limited Methyl methacrylate purification process

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