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Yixin Qu,Shui Wang,Tian Li 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.10
The solubility of D-p-hydroxyphenylglycine p-toluenesulfonate and L-p-hydroxyphenylglycine in different solvents was measured using a laser monitoring observation technique. The solubility data were accurately correlated by the modified Apelblat equation, the calculated results of which were proved to show fine representation of experimental data.
Shui Wang,Yixin Qu,Yizhen Du,Ping Zhang,Xiaowei Cheng 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.12
We studied the direct synthesis of 5-hydroxymethylfurfural (5-HMF) from cottonseed hull biomass underacid condition in one-pot. The influence of HCl dosage, reaction temperature and time, CrCl3·6H2O amount, and cotton-seed hull loading on the yield of 5-HMF was investigated. As a result, a 5-HMF yield up to 51% was obtained using 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) catalyzed with chromium (III) chloride at 130 oC for 2 h. The [Bmim]Cl/CrCl3·6H2O/HCl system was found to have high activity and selectivity for the dehydration of cellulose into 5-hydroxy-methylfurfural. This work provides a low cost, environment-friendly and energy-efficient process to directly convertraw biomass into bio-fuels and chemicals.
Solubility of 5-mercapto-1-methyltetrazole in pure solvents from (283 to 329) K
Lin Zhang,Yixin Qu,Yongze Wang 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.4
The solubility of 5-mercapto-1-methyltetrazole in pure solvents from (283 to 329) K was measured using a laser monitoring observation technique at atmospheric pressure. The solubility data were accurately correlated by a modified Apelblat equation. The calculated results of which are proved to show fine representation of experimental data.
Shui Wang,Guojing Zhao,Yizhen Du,Yixin Qu 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.6
A new multistage countercurrent melt crystallizer with sieve plates is proposed that combines the advantages of the TNO column crystallizer and the inclined column crystallizer. With the naphthalene-indene solid solution system, the purification process of organic materials in the new multistage countercurrent melt crystallizer with sieve plates under total reflux was investigated. Two of the influencing factors on the separation and purification performance in the new multistage countercurrent melt crystallizer with sieve plates were crystal settling velocity and crystal breakage, which were controlled by stirring speed, the sieve plates, the angle of the sieve plates, the diameter of the pores, particle sedimentation area, and the number of plates. The results of this study show that the optimum stirring speed was determined to be 20 rpm, sieve plates can obviously increase the separation and purification effect, the optimum angle of the sieve plates was determined to be 45o, the optimum diameter of the pores was determined to be 8 mm, the optimum particle sedimentation area was determined to be 0.5 r, and two plates in the crystallizer were shown to be the best.