Competitive Transport of Hydrochloric Acid and Zinc Chloride Through Diffusion Dialysis and Electrodialysis Membranes. Recovery of Spent Pickling Solutions

Solvent extraction technique was applied for the extraction of β-Sitosterol from jatropha seed oil．The optimum conditions for the lab scale extraction were obtained at 30ml solvent, 0.05g magnesium power, ratio of hydrochloric acid to zinc chloride of 1/1.75 (ml/g) and tetrahydrofuran as a solvent. Under the optical conditions, the yield of β-sitosterol was up to 3.27mg/g.

Download Full-text

Organophosphorus compounds. XII. A new synthesis of phosphindolines and phosphindoles

Australian Journal of Chemistry ◽

10.1071/ch9740831 ◽

1974 ◽

Vol 27 (4) ◽

pp. 831 ◽

Cited By ~ 17

Author(s):

DJ Collins ◽

LE Rowley ◽

JM Swan

Keyword(s):

Hydrochloric Acid ◽

Zinc Chloride ◽

Organophosphorus Compounds ◽

Magnesium Bromide ◽

New Synthesis

The reaction of 2-phenylethylphosphonous dichloride with zinc chloride at 170� followed by hydrolysis with concentrated hydrochloric acid, and oxidation, gave 72% of 1-hydroxyphosphindoline 1-oxide. Treatment of the derived phosphinic chloride with vinyl magnesium bromide at -40� afforded 1-vinylphosphindoline 1-oxide which underwent addition of dimethylamine to yield 1-(2'-dimethylaminoethyl)phosphindoline 1-oxide. The conversions of 1-chlorophosphindoline 1-oxide into 1-ethyl- and 1-phenyl-phosphindoline 1-oxide are described. Bromination of l-methoxy- phosphindoline 1-oxide with N-bromosuccinimide followed by dehydrobromination afforded 1-methoxyphosphindole 1-oxide. 1-(2'-Dimethylaminoethyl)phosphindoline 1-oxide and the corresponding phosphine sulphide were assayed for analgetic activity.

Download Full-text

O-Benzylidene Derivatives of D-Arabinose Diethyl and Dipropyl Dithioacetal

Australian Journal of Chemistry ◽

10.1071/ch9960273 ◽

1996 ◽

Vol 49 (3) ◽

pp. 273 ◽

Cited By ~ 1

Author(s):

J Kuszmann ◽

E Gacsbaitz

Keyword(s):

Hydrochloric Acid ◽

Zinc Chloride ◽

Partial Hydrolysis ◽

Kinetic Control ◽

Toluenesulfonic Acid ◽

Thermodynamic Phase ◽

Hydrolysis Of ◽

Derivatives Of

Benzylidenation of D-arabinose diethyl and dipropyl dithioacetals with α,α-dimethoxytoluene in the presence of p-toluenesulfonic acid has been studied in detail. Under kinetic control the two terminal dioxolan -type 4,5-O-(R)- and 4,5-O-(S)-benzylidene diastereomers are formed first which are in equilibrium with each other In the thermodynamic phase of the reaction the corresponding dioxan -type 3,5-O-(R)- benzylidene isomer is formed too, but all three monobenzylidene isomers are gradually converted into the four possible dioxolan -type 2,3 : 4,5-di-O benzylidene diastereomers . The dioxan -type 2,4:3,5-di-O-benzylidene isomer was present only in trace amounts. When benzaldehyde was used as reagent in the presence of hydrochloric acid or zinc chloride only the 2,3: 4,5-di-O-benzylidene diastereomers were formed. Partial hydrolysis of the dibenzylidene derivatives yielded the corresponding 2,3-O-benzylidene diastereomers. Structures, including the chirality of the benzylidene groups, were determined by n.m.r. spectroscopy. A mechanism suggested for the reaction was partially supported by equilibration studies.

Download Full-text