Acid-Extraction of pectin from soybean hull was studied.The effects of temperature,pH<ratios of soybeau hull to extraction solvent,extraction time on the yields of soybean hull pectin prepared were measured.The res...Acid-Extraction of pectin from soybean hull was studied.The effects of temperature,pH<ratios of soybeau hull to extraction solvent,extraction time on the yields of soybean hull pectin prepared were measured.The result shows that optimized conditions are extraction temperature 85℃,pH=1.5and ratios of soybean hull to extraction solvent is 1∶8 and extraction time is 30 min.展开更多
The effects of temperature,stabilizer,the percentage of heptane in toluene heptane asphaltene solution on stabilization of petroleum asphaltene in the solution were examined with spectrophotometric method.The results ...The effects of temperature,stabilizer,the percentage of heptane in toluene heptane asphaltene solution on stabilization of petroleum asphaltene in the solution were examined with spectrophotometric method.The results showed that the stability of petroleum asphaltene in the solution increases with the increase of temperature and headgroup polarity of stabilizer.Petroleum asphaltene starts to precipiate evidently in toluene heptane asphaltene solution when the composition of heptane in the solution reaches 30%～40%(v).展开更多
文摘Acid-Extraction of pectin from soybean hull was studied.The effects of temperature,pH<ratios of soybeau hull to extraction solvent,extraction time on the yields of soybean hull pectin prepared were measured.The result shows that optimized conditions are extraction temperature 85℃,pH=1.5and ratios of soybean hull to extraction solvent is 1∶8 and extraction time is 30 min.
文摘The effects of temperature,stabilizer,the percentage of heptane in toluene heptane asphaltene solution on stabilization of petroleum asphaltene in the solution were examined with spectrophotometric method.The results showed that the stability of petroleum asphaltene in the solution increases with the increase of temperature and headgroup polarity of stabilizer.Petroleum asphaltene starts to precipiate evidently in toluene heptane asphaltene solution when the composition of heptane in the solution reaches 30%～40%(v).
