Article
  • Polymerization of Mixed Butenes
  • Cho I, Park CE
  • 부텐 혼합물의 중합
  • 조의환, 박찬언
Abstract
The product butene mixture (B-B raffinate) from butadiene production in naphtha cracking plant was directly polymerized under various reaction conditions in search for the possible application of otherwise wasted product. Analysis of butene mixture by gas chromatography indicated that unsaturated components were added up to 80%. Sulfric acid, aluminum chloride and boron trifluoride etherate were used as catalysts. Aluminum chloride was dissolved in 2-nitropropane before use. While sulfuric acid system yielded only oligomers of very low molecular weight product, aluminum chloride gave the high molecular weight product. As the amount of catalyst increase, the total yield of polymer increased but large portion of the product was low molecular weight materials. Difficulty was encountered in removing the catalyst after the reaction. Alkali washing often gave rather stable emulsion which did not separate readily on standing. Addition of inorganic salts helped somewhat. After washing and vacuum stripping of volatiles the resinous product was obtained as final products.

납사 분해공정중의 부타디엔의 분리과정에서 얻어지는 부산물인 부텐혼합물을 여러 가지 반응조건에서 양이온 중합시켜 폴리부텐을 얻었다. 부텐혼합물은 G.C.를 사용하여 그 조성을 분석하였던 바 불포화 화합물이 80%에 달했다. 중합촉매로는 황산과 프리델크래프트 촉매인 AlCl3와 BF3·O(C2H5)2 를 사용하였으며 AlCl3는 2-nitropropane의 용액을 만들어 사용하였다. 황산촉매를 쓰면 dimer, trimer, tetramer가 주로 생성되었으며 AlCl3를 사용하면 점도가 큰 유체상의 중합체를 얻었고 G.P.C.로 분석한 결과 최고 분자량이 20,000 정도였다. 촉매의 농도를 증가시키면 폴리부텐의 수득율은 증가했으나 분자량이 작은 폴리부텐의 생성이 많았다. 알칼리 수용액을 써서 촉매를 제거할 때 현탁액이 형성되어 중합체와 쉽게 분리가 되지 않았으며 폴리부텐의 분석은 GC, IR, NMR을 사용하였는데 주로 이소부텐의 중합체임을 알았다.

Keywords:

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1977; 1(6): 285-291

    Published online Aug 25, 1977

  • 10.7317/pk.
  • Received on Nov 30, -0001
  • Revised on Nov 30, -0001
  • Accepted on Nov 30, -0001

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