Bixin Powder Production in Conical Spouted Bed Units

Abstract

30.160-030 -Belo Horizonte -MG. Brazil 2. Chemical Engineering ProgramICOPPE, Universidade Federal do Rio de Janeiro 2 1.945-970 -Rio de Janeiro -RJ. BrazilABSTRACT Recent work has demonstrated that the red carotenoid bixin is easily extracted from Hlxa orellana seeds by panicle attrition and impact rather than by solvent extraction. This technique may require a previous step for drying seeds at a safe temperature to preserve pigment quality. A spouted bed (SB) with a draft tube is the most appropriate equipment to process both seed drying and bixin extraction at low operational costs. Operational parameters of the SB unit are optimized as a function of the powder production rate. The maximum air inlet temperature for drying the seeds is also specified. A high performance liquid chromatography method has been developed for the semi-quantitative determination of bixin content in the powder produced. Results show that this SB unit can be more competitive than ball mill equipment. 1855CapyrighlO 1998 by Marcel Dekkcr. Inc.

Bed-to-surface heat transfer in conical spouted beds of biomass–sand mixtures

“…Spouted beds have been used in drying suspensions, solutions, and pasty materials [2][3][4][5][6][7]. Chemical reaction applications, such as catalytic polymerization [8], coal gasification [9,10], and waste pyrolysis [11][12][13], have also been under development.…”

Measurements of local flow structures of conical spouted beds by optical fibre probes

“…Due to the vigorous systematic cyclic movement of solids and effective gas–solids contact, conical spouted beds have been commonly used for drying suspensions, solutions and pasty materials (Pham, 1983; Markowski, 1992; Passos et al, 1997, 1998; Reyes et al, 1998). Conical spouted beds can also be utilized in many other processes, such as catalytic partial oxidation of methane to synthesis gas (Marnasidou et al, 1999), coating of tablets (Kucharski and Kmiec, 1983), coal gasification and liquefaction (Uemaki and Tsuji, 1986), pyrolysis of sawdust or mixtures of wood residues (Aguado et al, 2000a,b; Olazar et al, 2000a,b, 2001a), although most of these are still under research and development.…”

Analysis of Spent Active Coke Properties by Spouted Bed Technique

“…Whether the phenomenon in a spouted bed is regarded as advantageous or not depends on the process in which it occurs (Mathur and Epstein, 1974;Passos et al, 1998;Zhu et al, 2005).…”