Solubilities and properties (density, conductivity and pH value) of solutions in the quaternary system Li +,K +//CO 2- 3,B 4O 2- 7-H 2O at 288 K were experimentally studied with the isothermal equilibrium method. The ...Solubilities and properties (density, conductivity and pH value) of solutions in the quaternary system Li +,K +//CO 2- 3,B 4O 2- 7-H 2O at 288 K were experimentally studied with the isothermal equilibrium method. The phase diagram of the system consisted of two invariant points E and F, five univariant curves, and four crystallization fields that belonged to K 2CO 3·3/2H 2O,Li 2 B 4O 7·3H 2O, K 2 B 4O 7 ·4H 2O and Li 2CO 3. The composition of the solution corresponding to E was w(CO 2- 3)=2.27 %, w(B 4O 2- 7) =6.05 %, w(K + ) =4.30%,w(Li + )=0.30 % and the equilibrium solids were Li 2 B 4O 7· 3H 2O+K 2 B 4O 7·4H 2O+Li 2CO 3;The composition of the solution for F was w(CO 2- 3) =22.45%,w(B 4O 2- 7)=1.88%,w(K + )=29.96%,w(Li + )=0.03% and the equilibrium solids were K 2CO 3·3/2H 2O+ K 2 B 4O 7·4H 2O+Li 2CO 3. K 2CO 3 possesses strong salting-out effect on K 2 B 4O 7,Li 2CO 3 and Li 2 B 4O 7.展开更多
ZHOU Bai-Bin *,1,2 WEI Yong-De 1 LI Zhong-Hua 1 ( 1 Department of Applied Chemistry,Ha rbin Institute of Technology ￡?Harbin￡±￡ì￡°￡°￡°￡±￡(c)( 2 Department of Chemistry,Harbin Norm...ZHOU Bai-Bin *,1,2 WEI Yong-De 1 LI Zhong-Hua 1 ( 1 Department of Applied Chemistry,Ha rbin Institute of Technology ￡?Harbin￡±￡ì￡°￡°￡°￡±￡(c)( 2 Department of Chemistry,Harbin Normal University￡?Harbin￡±￡ì￡°￡°￡?￡°￡(c) The air-solid interface reaction of Ce,Lu with K10 H 3[Gd (SiMo 4 W￡*O￡3￡1￡(c) 2]through chemistry-heated permeation is reported for the fi rst time￡(r)The permeated complex is characterized by ICP and the result shows tha t the mini mum Ce,Lu can permeate into the inner sph ere of K 10 H ￡3 ￡?Gd ￡¨SiMo ￡′ W ￡* O ￡3￡1 ￡(c) 2]The IR ,XRD patterns give the eviden ce that after permeation the comple x still keeps the Keggin structure,howe ver,its crystal structure is different from the complex before permeation￡(r)The cond uctivity of the permeated complex has been measured with the four-electr ode method and the data show that the co nductivity of the complex after permeation is 10 6 times higher than that of the sample before permeation and reaches ￡′￡(r)84 6×10 -1 S·cm -1 ￡(r)These indicate that the permeated c omplex is a good solid electrolyte and further appli cations are also expected￡(r)展开更多
n-Butylacetate is synthesized using H2SO4-K2Cr2O7 modified coal activated carbon as catalyst.Factors influencing the reaction are discussed.It is showed that the fractional conversion of acetic acid could reach 99.2% ...n-Butylacetate is synthesized using H2SO4-K2Cr2O7 modified coal activated carbon as catalyst.Factors influencing the reaction are discussed.It is showed that the fractional conversion of acetic acid could reach 99.2% when the molar ratio of acid to n-butanol is 1∶1.5,reaction time is 2.5h,the amount of catalyst is as 5.26% as the mass of total reactants.In addition,the catalyst can be used repeatedly and has no pollution to environment.展开更多
文摘Solubilities and properties (density, conductivity and pH value) of solutions in the quaternary system Li +,K +//CO 2- 3,B 4O 2- 7-H 2O at 288 K were experimentally studied with the isothermal equilibrium method. The phase diagram of the system consisted of two invariant points E and F, five univariant curves, and four crystallization fields that belonged to K 2CO 3·3/2H 2O,Li 2 B 4O 7·3H 2O, K 2 B 4O 7 ·4H 2O and Li 2CO 3. The composition of the solution corresponding to E was w(CO 2- 3)=2.27 %, w(B 4O 2- 7) =6.05 %, w(K + ) =4.30%,w(Li + )=0.30 % and the equilibrium solids were Li 2 B 4O 7· 3H 2O+K 2 B 4O 7·4H 2O+Li 2CO 3;The composition of the solution for F was w(CO 2- 3) =22.45%,w(B 4O 2- 7)=1.88%,w(K + )=29.96%,w(Li + )=0.03% and the equilibrium solids were K 2CO 3·3/2H 2O+ K 2 B 4O 7·4H 2O+Li 2CO 3. K 2CO 3 possesses strong salting-out effect on K 2 B 4O 7,Li 2CO 3 and Li 2 B 4O 7.
文摘ZHOU Bai-Bin *,1,2 WEI Yong-De 1 LI Zhong-Hua 1 ( 1 Department of Applied Chemistry,Ha rbin Institute of Technology ￡?Harbin￡±￡ì￡°￡°￡°￡±￡(c)( 2 Department of Chemistry,Harbin Normal University￡?Harbin￡±￡ì￡°￡°￡?￡°￡(c) The air-solid interface reaction of Ce,Lu with K10 H 3[Gd (SiMo 4 W￡*O￡3￡1￡(c) 2]through chemistry-heated permeation is reported for the fi rst time￡(r)The permeated complex is characterized by ICP and the result shows tha t the mini mum Ce,Lu can permeate into the inner sph ere of K 10 H ￡3 ￡?Gd ￡¨SiMo ￡′ W ￡* O ￡3￡1 ￡(c) 2]The IR ,XRD patterns give the eviden ce that after permeation the comple x still keeps the Keggin structure,howe ver,its crystal structure is different from the complex before permeation￡(r)The cond uctivity of the permeated complex has been measured with the four-electr ode method and the data show that the co nductivity of the complex after permeation is 10 6 times higher than that of the sample before permeation and reaches ￡′￡(r)84 6×10 -1 S·cm -1 ￡(r)These indicate that the permeated c omplex is a good solid electrolyte and further appli cations are also expected￡(r)
文摘n-Butylacetate is synthesized using H2SO4-K2Cr2O7 modified coal activated carbon as catalyst.Factors influencing the reaction are discussed.It is showed that the fractional conversion of acetic acid could reach 99.2% when the molar ratio of acid to n-butanol is 1∶1.5,reaction time is 2.5h,the amount of catalyst is as 5.26% as the mass of total reactants.In addition,the catalyst can be used repeatedly and has no pollution to environment.
