Preparation of hot extracts and use in beer making operation
Abstract
Abstract HOP EXTRACT IN, E.G., HEXANE, PREISOMERIZED, OPTIONALLY PREREDUCED, IS EXTRACTED WITH AQUEOUS KOH TO GIVE POTASSIUM ISOHUMULATE OF 80& + AND PREFERABLY 90%+ PURITY. ISOHUMULONES IS STRIPPED OF SOLVENT AND IS SUITABLE FOR KETTLE ADDITION. IN ORDER TO PREVENT FOAMING DURING SUBSEQUENT CONCENTRATION, THE AQUEOUS EXTRACT CONTAINING ABOUT 6% SOLIDS IS ACIDIFIED TO A PH LESS THAN THE PKA OF ISOHUMULONE AND IS CONCENTRATED UNDER REDUCED PRESSURE. AFTER CONCENTRATION, THE MATERIAL IS TREATED WITH KOH TO FORM THE WATER SOLUBLE ISHOUMULONE SALT WHICH IS ADDED TO BEER POSTKETTLE. AT A CRITICAL OPTINIUM PH RANGE, DEPENDENT UPON THE RATIO OF WATER TO HEXANE PHASE USED IN THE INITIAL EXTRACTION, FROM 0.1 TO 0.75 OF THE ISOHUMULONES MAY BE EXTRACTED IN THE HIGHLY PURIFIED FORM. A GENERALIZED TECHNIQUE FOR ESTABLISHING CONDITIONS THAT WILL GIVE SUCH A DESIRED FRACTIONS AND RESIDUES IS DISCLOSED.
Inventors
- 👤 D Westermann
- 👤 E Chicoye
- 👤 D Hoffmann
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |