Processing of hop resins and similar materials
| Title: | Processing of hop resins and similar materials |
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| Patent Number: | 4,395,431 |
| Publication Date: | July 26, 1983 |
| Appl. No: | 06/149,566 |
| Application Filed: | May 14, 1980 |
| Abstract: | A method for the solvent-free processing and/or handling of a complex organic mixture, characterized in that the mixture is coated on to an inert hydrophobic support prior to such processing or handling. Also included is a method for separating a two-phase system having a phase comprising a complex organic mixture and an aqueous phase by contact with an inert hydrophobic support. The invention is particularly concerned with the treatment of complex materials of a resinous nature, especially those of plant origin and, specifically, hop resins. The invention further includes a method for the selective extraction of hop resin components wherein a hop resin extract is coated onto an inert hydrophobic support, from which components of the resin can be selectively extracted. |
| Inventors: | Lance, David G. (St. Andrews, AUX); Skinner, Raymond N. (Greensborough, AUX) |
| Assignees: | Carlton and United Breweries Limited (Carlton, AUX) |
| Claim: | We claim |
| Claim: | 1. A method for producing a hop resin product comprising the steps of |
| Claim: | contacting an inert hydrophobic support with a solvent-free two phase system comprising a hop resin extract and an aqueous phase to effect coating of said resin onto said support, and |
| Claim: | separating the resin-coated support from said system. |
| Claim: | 2. A method for the selective extraction of hop resin components comprising the steps of |
| Claim: | contacting an inert hydrophobic support with a solvent-free two-phase system comprising a hop resin extract and an aqueous phase to effect coating of said resin onto said support and |
| Claim: | selectively extracting components of said resin from said inert hydrophobic support. |
| Claim: | 3. A method as claimed in claim 2, characterised in that the resin-coated support is contacted with an aqueous solution of an alkali salt at a suitable pH to thereby selectively extract the .alpha.-acids. |
| Claim: | 4. A method as claimed in claim 3, characterised in that after extraction of the .alpha.-acids, the .beta.-acids are extracted by contact of the coated support with aqueous alkali at a suitable pH. |
| Claim: | 5. A method as claimed in claim 2 or claim 3, characterised in that the resin-coated support is contained in one or more columns through which the alkaline solution is passed to effect the extraction. |
| Claim: | 6. A method as claimed in claim 2, characterised in that prior to extraction the resin while on the support is reacted with a suspension of an alkaline earth oxide or hydroxide to thereby isomerize the .alpha.-acids in the resin. |
| Claim: | 7. A method as claimed in claim 2, characterised in that prior to extraction the resin while coated on the support is heated in the presence of a metallic hydride to isomerise and reduce the .alpha.-acids. |
| Current U.S. Class: | 426/600; 426/431 |
| Current International Class: | C12C 902 |
| Patent References Cited: | 2356501 November 1942 Brown 2507084 April 1948 Ansel 2816032 December 1957 Meyer 2925344 February 1960 Peut 3433642 March 1969 Nakayama 3785858 January 1974 Chapin 3798332 March 1974 Westerman 3881026 April 1975 Shepherd 3892808 July 1975 Mikhell 3955012 May 1976 Okamuron 4049834 September 1977 Barwald 4097614 June 1978 West 4216269 August 1980 Tonali 4218491 August 1980 Laws |
| Primary Examiner: | Bernstein, Hiram H. |
| Attorney, Agent or Firm: | Finnegan, Henderson, Farabow, Garrett & Dunner |
| Accession Number: | edspgr.04395431 |
| Database: | USPTO Patent Grants |
| Language: | English |
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