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Method for handling waste oil

  • US 6,414,183 B1
  • Filed: 04/05/2000
  • Issued: 07/02/2002
  • Est. Priority Date: 04/05/1999
  • Status: Expired due to Term
First Claim
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1. A method for producing (meth)acrylic acid or ester thereof comprising:

  • providing a reaction gas generated by oxidizing propylene and/or acrolein in contact with a gas containing molecular state oxygen, or a reaction gas generated by oxidizing at least one member selected from isobutylene, t-butyl alcohol and methacrolein in contact with a gas containing molecular state oxygen;

    treating the reaction gas to produce a (meth)acrylic acid solution; and

    purifying the (meth)acrylic acid solution to produce (meth)acrylic acid, wherein waste oil produced during the method and which contains (meth)acrylic acid or ester thereof is coexisted with a solvent.

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