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US3816239A Expired / Lapsed US ⏱️ 0.0 years remaining

Recovery of terpenes

Assignee: Envirotech Corp
•
Filing: 1971-03-12
•
Granted: 1974-06-11
•
Expires: 1991-03-12
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Abstract

Abstract Disclosed is a method for recovering terpenes from a wet, gaseous stream containing terpene vapor and water vapor by condensing water from the stream by indirect heat exchange to produce an aqueous liquid terpene-lean condensate phase while leaving a first terpene-rich vapor phase. The aqueous terpenelean condensate is disengaged from said vapor phase, subcooled and used as the indirect heat exchange medium at boiling for condensing additional terpene-lean condensate from the wet, gaseous stream. During this indirect heat exchange, a portion of the terpene-lean condensate is flash vaporized; and these distillate vapors are combined with the first terpene-rich vapor phase for recovery of terpenes therefrom by condensation at a temperature below the dew point temperature of the terpene component.

Inventors

  • 👤 R Marks

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 17:01
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0007

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 75 words
The process according to preceding claim 1 with the additional steps of conducting said liquid residue from step (a)(ii) to a location remote from said zone, cooling said liquid residue to a temperature below that of said gaseous stream and mixing at least part of the resulting cooled liquid residue with the relatively cooler terpene-bearing coolant fluid prior to indirect heat exchange contact of the latter with the gaseous stream in accordance with step (a).

References Cited (Backward Citations)

US3347681A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-06-10 1977-12-10 1978-06-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-10 1981-12-10 1982-06-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-10 1985-12-10 1986-06-11 $7700.00 Window Closed / Lapsed

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