GB1007838A - Process for rendering 2-pyrrolidone anhydrous - Google Patents

Process for rendering 2-pyrrolidone anhydrous

Info

Publication number
GB1007838A
GB1007838A GB36664/61A GB3666461A GB1007838A GB 1007838 A GB1007838 A GB 1007838A GB 36664/61 A GB36664/61 A GB 36664/61A GB 3666461 A GB3666461 A GB 3666461A GB 1007838 A GB1007838 A GB 1007838A
Authority
GB
United Kingdom
Prior art keywords
pyrrolidone
xylene
water
anhydrous
caprolactam
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
GB36664/61A
Inventor
William Oscar Ney
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing 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
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to GB36664/61A priority Critical patent/GB1007838A/en
Publication of GB1007838A publication Critical patent/GB1007838A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
    • C07D207/22—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D207/24—Oxygen or sulfur atoms
    • C07D207/26—2-Pyrrolidones
    • C07D207/263—2-Pyrrolidones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms
    • C07D207/267—2-Pyrrolidones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to the ring nitrogen atom

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

Anhydrous 2-pyrrolidone and caprolactam or solutions of their alkali salts therein (see Division C2) may be polymerized or copolymerized using N-acetyl pyrrolidone as promoter. The solid products in the example are finely divided, slurried with acetic acid and extruded into films and filaments. Specification 731,294 is referred to.ALSO:Water is removed from 2-pyrrolidone or solutions of pyrrolidone salts by iodistilling the water with xylene from a mixture of xylene and the 2-pyrrolidone or pyrrolidone salt at a pressure such that the removal of the water is completed at a temperature below the decomposition temperature of the hydrate of 2-pyrrolidone. The xylene may be o-, m-, p-xylene or mixtures thereof and is preferably used in amounts of 20 to 500 parts per hundred parts by weight of pyrrolidone. Specified temperatures and pressures are 30-60 DEG C. and 10 to 30 mm. Hg respectively. In an example, an anhydrous solution of potassium pyrrolidone in pyrrolidone is prepared by adding aqueous potassium hydroxide solution to pyrrolidone in xylene and distilling off the water and xylene. An anhydrous solution of potassium caprolactam in caprolactam is prepared similarly. Uses: Formation of polymers. Specification 731,294 is referred to.
GB36664/61A 1961-10-12 1961-10-12 Process for rendering 2-pyrrolidone anhydrous Expired GB1007838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB36664/61A GB1007838A (en) 1961-10-12 1961-10-12 Process for rendering 2-pyrrolidone anhydrous

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36664/61A GB1007838A (en) 1961-10-12 1961-10-12 Process for rendering 2-pyrrolidone anhydrous

Publications (1)

Publication Number Publication Date
GB1007838A true GB1007838A (en) 1965-10-22

Family

ID=10390156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36664/61A Expired GB1007838A (en) 1961-10-12 1961-10-12 Process for rendering 2-pyrrolidone anhydrous

Country Status (1)

Country Link
GB (1) GB1007838A (en)

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