Separating a linear C5 hydrocarbon from a branched C6 hydrocarbon: n-pentane from 2,2-dimethyl butane using levitation and blow torch effects

2021 ◽  
Author(s):  
Shubhadeep Nag ◽  
Prabal K. Maiti ◽  
Subramanian Yashonath
Keyword(s):  
High Purity ◽  
Zeolite Nay ◽  
Very High

A mixture of n-pentane and 2,2-dimethyl butane can be separated to a very high purity using zeolite NaY. This can be achieved by a judicious combination of levitation and blow torch effects. The separation uses very little energy.

Very-high-purity InP l.p.e. layers

1977 ◽  
Vol 13 (22) ◽  
pp. 682 ◽  
Author(s):  
K.T. Ip ◽  
L.F. Eastman ◽  
V.L. Wrick
Keyword(s):  
High Purity ◽  
Very High

scholarly journals REFLEXOS DO PROCESSAMENTO DE CANA-DE-AÇÚCAR BISADA NA QUALIDADE DO AÇÚCAR VHP

2014 ◽  
Vol 32 (2) ◽  
Author(s):  
GUSTAVO HENRIQUE GRAVATIM COSTA ◽  
IGOR DOS SANTOS MASSON ◽  
JULIANA PELEGRINI ROVIERO ◽  
MÁRCIA ROSSINI JUSTINO MUTTON
Keyword(s):  
High Purity ◽  
Very High

O presente trabalho teve por objetivo comparar a qualidade do caldo clarificado e do açúcar Very High Purity (VHP), produzido de cana bisada e com cultivar de maturação precoce no início da safra. Instalou-se o experimento na Usina São Martinho S/A, Pradópolis (SP), sendo os processos de clarificação e de produção de açúcar desenvolvidos no Laboratório de Tecnologia do Açúcar e do Álcool, da Faculdade de Ciências Agrárias e Veterinárias (FCAV) da Universidade Estadual Paulista (UNESP), Jaboticabal (SP). Adotou-se delineamento experimental inteiramente casualizado, sendo empregadas as cultivares SP83-2847 (bisada) e RB855156 (não bisada), com doze repetições para análises tecnológicas e quatro repetições para a produção de açúcar. O processo de clarificação e o caldo clarificado foram avaliados quanto à velocidade de sedimentação, volume de lodo formado, teor de sólidos solúveis totais, pH, turbidez, compostos fenólicos, cor e amido. Caracterizou-se o açúcar quanto aos parâmetros porcentagem de sacarose aparente, cor, compostos fenólicos, amido, filtrabilidade, umidade e fator de segurança. Verificou-se que o processo de clarificação do caldo não foi afetado pelo processamento de cana bisada. No entanto, o caldo clarificado da cultivar SP83-2847 apresentou valor mais elevado para o parâmetro cor e maior teor de sólidos solúveis totais. O açúcar produzido a partir de cana bisada apresentou qualidade similar ao da cultivar de maturação precoce. Conclui-se que o processamento de cana bisada em início de safra não afeta a clarificação do caldo e resulta em açúcar VHP com qualidade similar ao da cultivar de maturação precoce.

Rolling and Recrystallization Textures in High Purity Al Cold Rolled to Very High Rolling Reductions

2005 ◽  
Vol 495-497 ◽  
pp. 603-608 ◽  
Author(s):  
Atsushi Todayama ◽  
Hirosuke Inagaki
Keyword(s):  
Cold Rolling ◽  
High Purity ◽  
Work Hardening ◽  
Dynamic Recovery ◽  
The Other ◽  
Rolling Reduction ◽  
Theoretical Investigations ◽  
Theoretical Predictions ◽  
Cold Rolled ◽  
Very High

On the basis of Taylor-Bishop-Hill’s theory, many previous theoretical investigations have predicted that, at high rolling reductions, most of orientations should rotate along theβfiber from {110}<112> to {123}<634> and finally into the {112}<111> stable end orientations. Although some exceptions exist, experimental observations have shown, on the other hand, that the maximum on the β fiber is located still at about {123}<634> even after 97 % cold rolling. In the present paper, high purity Al containing 50 ppm Cu was cold rolled up to 99.4 % reduction in thickness and examined whether {112}<111> stable end orientation could be achieved experimentally. It was found that, with increasing rolling reduction above 98 %, {110}<112> decreased, while orientations in the range between {123}<634> and {112}<111> increased, suggesting that crystal rotation along the βfiber from {110}<112> toward {123}<634> and {112}<111> in fact took place. At higher rolling reductions, however, further rotation of this peak toward {112}<111> was extremely sluggish, and even at the highest rolling reduction, it could not arrive at {112}<111>. Such discrepancies between theoretical predictions and experimental observations should be ascribed to the development of dislocation substructures, which were formed by concurrent work hardening and dynamic recovery. Since such development of dislocation substructures are not taken into account in Taylor-Bishop-Hill’s theory, it seems that they can not correctly predict the development of rolling textures at very high rolling reductions, i. e. stable end orientations. On annealing specimens rolled above 98 % reduction in thickness, cube textures were very weak, suggesting that cube bands were almost completely rotated into other orientations during cold rolling. {325}<496>, which lay at an intermediate position between {123}<634> and {112}<111> along theβfiber, developed strongly in the recrystallization textures.

Very high purity InP layer grown by liquid‐phase epitaxy using erbium gettering

1993 ◽  
Vol 73 (1) ◽  
pp. 468-470 ◽  
Author(s):  
Meng‐Chyi Wu ◽  
Cheng‐Ming Chiu
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Epitaxy ◽  
High Purity ◽  
Very High

Very high purity GaAs: Free exciton dominated 5 K photoluminescence and magnetophotoluminescence spectra

1987 ◽  
Vol 62 (10) ◽  
pp. 703-706 ◽  
Author(s):  
Emil S. Koteles ◽  
B.S. Elman ◽  
S.A. Zemon
Keyword(s):  
High Purity ◽  
Free Exciton ◽  
Very High
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