New proposal for extracting rosemary compounds: Process intensification and economic evaluation

Author(s)

Zabot, Giovani L. ^[1] ; Moraes, Moyses N. ^[1] ; Carvalho, Pedro I. N. ^[1] ; Meireles, M. Angela A. ^[1]

Affiliation

^[1] Univ Estadual Campinas, UNICAMP, Sch Food Engn, LASEFI, DEA, FEA, BR-13083862 Sao Paulo - Brazil

• Document type: Journal article
• Source: INDUSTRIAL CROPS AND PRODUCTS; v. 77, p. 758-771, DEC 23 2015.
• Web of Science Citations: 30

Abstract

This paper brings forward techno-economic results of a study developed with rosemary. Process intensification was applied for obtaining two fractions of bioactive compounds: one fraction rich in volatile oil and other fraction rich in non-volatile extract. Terpenoids as 1,8-cineole and camphor were obtained by supercritical CO2 extraction (SFE-CO2). Afterwards, phenolic compounds as rosmarinic acid and carnosic acid were obtained by pressurized water extraction (PWE). We performed SFE-CO2 and PWE in the same multipurpose equipment without unloading the bed. Extraction yields and composition of each extract fraction were evaluated. We obtained approximately 2.5 wt.% of a fraction rich in volatile oil at 40 degrees C, 30 MPa and solvent mass to feed mass (S/F) ratio of 2.5 g CO2/g rosemary. Likewise, weobtained approximately 18.6 wt.% of a fraction rich in non-volatile extract at continuous temperature increase of 1.1 degrees C/min (from 40 degrees C to 172 degrees C), 10 MPa and S/F ratio of 9.5 g water/g rosemary. We simulated costs of manufacturing of extracts obtained by SFE-CO2 in three productive plants containing 2 vessels of 10 L, 50 Land 100 L The influence of bed geometry was considered into the simulation model, whereas the bed height (HB) to bed diameter (D-B) ratios were: H-B1/D-B1 = 7.1 and H-B2/D-B2 = 2.7. We simulated the productivity of extracts and operating costs for an industrial plant containing 2 vessels of 100 L using the process intensification performed in this paper (SFE-CO2 + PWE). The proposal is promising and can encourage industrial application, because the higher use of the vegetal matrix for obtaining diversified bioactive compounds can reduce 28% of the annual production costs of SFE-CO2 + PWE processes whether comparing with SFE-CO2 process alone. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 11/23665-2 - Obtaining bioactive compounds from clove and rosemary using supercritical technology: influence of the bed geometry, process intensification and cost of manufacturing of extracts
• Grantee: Giovani Leone Zabot
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 12/10685-8 - Combination and coupling of processes for the production and encapsulation of value-added vegetal extracts: technical and economic evaluation
• Grantee: Maria Angela de Almeida Meireles Petenate
• Support Opportunities: Regular Research Grants