Isolation and characterisation of L-quebrachitol from rubber factory wastewater

Meng Z. H., . and Zhang G. M., . and Xue M., . and Jiang S. K., . and Wu Y., . Isolation and characterisation of L-quebrachitol from rubber factory wastewater. pp. 234-33. ISSN 1511-1768

In the production process of natural rubber (NR) large quantities of wastewater containing substantial amounts of L-quebrachitol are discharged. To date published methods of extracting L-quebrachitol from wastewater are still at the laboratory stage. In this study membrane separation technology was applied to the extraction of L-quebrachitol from wastewater and the experimental parameters were studied in order to determine optimal experimental conditions. Results show that the optimum source material for L-quebrachitol extraction was the serum collected by squeezing the latex coagulum. When this serum was passed through a microfiltration (MF) membrane and two ultrafiltration (UF) membranes majority of the organic impurities were removed. The resulting ultrafiltrate was concentrated by a nanofiltration (NF) membrane and washed twice. Finally a new and convenient approach for large scale extraction of L-quebrachitol is proposed combining membrane separation and crystallisation. The output achieved with this approach would be 10 kg per year under laboratory conditions with 99.20 purity. The structure of L-quebrachitol was confirmed by elementary analysis infrared (IR) spectroscopy nuclear magnetic resonance (NMR) spectroscopy mass spectroscopy (MS) and single-crystal X-ray diffraction.

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Abstract

In the production process of natural rubber (NR) large quantities of wastewater containing substantial amounts of L-quebrachitol are discharged. To date published methods of extracting L-quebrachitol from wastewater are still at the laboratory stage. In this study membrane separation technology was applied to the extraction of L-quebrachitol from wastewater and the experimental parameters were studied in order to determine optimal experimental conditions. Results show that the optimum source material for L-quebrachitol extraction was the serum collected by squeezing the latex coagulum. When this serum was passed through a microfiltration (MF) membrane and two ultrafiltration (UF) membranes majority of the organic impurities were removed. The resulting ultrafiltrate was concentrated by a nanofiltration (NF) membrane and washed twice. Finally a new and convenient approach for large scale extraction of L-quebrachitol is proposed combining membrane separation and crystallisation. The output achieved with this approach would be 10 kg per year under laboratory conditions with 99.20 purity. The structure of L-quebrachitol was confirmed by elementary analysis infrared (IR) spectroscopy nuclear magnetic resonance (NMR) spectroscopy mass spectroscopy (MS) and single-crystal X-ray diffraction.

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Item Type:	Article
AGROVOC Term:	Rubber industry
AGROVOC Term:	Wastewater
AGROVOC Term:	Isolation
AGROVOC Term:	Laboratory experimentation
AGROVOC Term:	Latex
AGROVOC Term:	Microfiltration
AGROVOC Term:	Ultrafiltration
AGROVOC Term:	Impurity
AGROVOC Term:	Separation
AGROVOC Term:	Crystallization
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/22949

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