Shijiazhuang Coking and Chemical Group Co.

Shijiazhuang, China

Shijiazhuang Coking and Chemical Group Co.

Shijiazhuang, China

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Zhao D.,Hebei University of Science and Technology | Li H.,Hebei University of Science and Technology | Zhang J.,Hebei University of Science and Technology | Fu L.,Hebei University of Science and Technology | And 4 more authors.
Carbohydrate Polymers | Year: 2012

Two kinds of alkylimidazolium salts containing dimethyl phosphate or diethyl phosphate were obtained as room temperature ionic liquids synthesized by one step, and both of them have the ability to dissolve untreated cellulose. Especially, 1-ethyl-3-methylimidazolium diethylphosphonate ([EMIM]DEP) could obtain 4 wt% cellulose solution within 10 min under 90. The effects of dissolution temperature on cellulose dissolution time and degree of polymerization were investigated. As dissolution temperature increased, dissolution time was greatly reduced. Both the original and regenerated cellulose samples were characterized with wide-angle X-ray diffraction, thermogravimetric analysis and scanning electron micrograph. The results showed that the crystalline structure of cellulose was converted to cellulose II from cellulose I in native cellulose. It was also found that the regenerated cellulose had good thermal stability with [EMIM]DEP ionic liquid. © 2011 Elsevier Ltd. All rights reserved.


Zhao D.,Hebei University of Science and Technology | Liu M.,Hebei University of Science and Technology | Ge J.,Hebei University of Science and Technology | Zhang J.,Hebei University of Science and Technology | And 2 more authors.
Chinese Journal of Organic Chemistry | Year: 2012

A series of functional binuclear ionic liquids based on bis-(3-methyl-l-imidazole)butylidene double P-toluene sulfonic acid salt (Im-PTSA), bis-(3-methyl-l-imidazole)butylidene double bisulfate (Im-HSO 4), bis-(1-pyridine)butylidene double p-toluene sulfonic acid salt (Py-PTSA), bis-(1-pyridine)butylidene double bisulfate (Py-HSO4) were synthesized by a two-step proceeding and their structures were characterized by FT-IR and 1H NMR spectra. Their thermal stabilities were characterized by TG In addition, the acidity and solubility of functional binuclear ionic liquids were also studied. The catalytic activity of the binuclear ionic liquids for the esterification of succinic acid with ethanol was measured. The results show that under the optimized conditions of n(succinic acid): n(ethanol)= 1: 3, catalyst used dosage 1.90% (wt), 70°C and 2.5 h, the yield of diethyl succinate reached 93.6% and the selectivity was near up to 100%. Im-PTSA was reused at least 8 times without significant decrease in activity after drying under vacuum. Austenitic stainless steel 316L was used for conducting the corrosion test under the above esterificaion condition, the corrosion rates of the steel plates dipped in the systems with these ionic liquids were less than one tenth of that with sulfuric acid. Fischer esterification of monocarboxylic acids and dicarboxylic acids with different alcohols was observed on using Im-PTSA as catalyst which gave high product yield and selectivity. Use of such a reaction catalyst should be appreciated for its convenient separation.


Zhao D.,Hebei University of Science and Technology | Liu M.,Hebei University of Science and Technology | Zhang J.,Hebei University of Science and Technology | Li J.,Hebei University of Science and Technology | And 2 more authors.
Chemical Engineering Journal | Year: 2013

Three kinds of imidazole based dicationic [C2(Mim)2], [C3(Mim)2], [C4(Mim)2] with traditional counter anion HSO4- ionic liquids (ILs) were synthesized. Key physicochemical properties, such as thermal stability, solubility in common solvents, acidic property and corrosion of ILs for Austenitic stainless steel 316 were determined. Esterification of alcohols by carboxylic acids has been carried out at room temperature in a group of imidazole dicationic ionic liquid. The catalytic performance was found to be much better than that of conventional non-cation functionalized ionic liquids and the corrosion was five times weaker than sulfuric acid. The esters were easily recovered due to immiscibility with the ionic liquid and reported imidazole dicationic ionic liquids were a promising catalyst for esterification reaction. © 2013 Elsevier B.V.


Li J.-P.,Hebei University of Science and Technology | Zhao D.-S.,Hebei University of Science and Technology | Zhang J.,Hebei University of Science and Technology | Ren P.-B.,Hebei University of Science and Technology | And 4 more authors.
Xiandai Huagong/Modern Chemical Industry | Year: 2013

The research development of ionic liquids in desuldurization of fuel oil in recent years is reviewed. The advantages and disadvantages of the extractive desulfurization and oxidative extractive desulfurization technologies are summarized. The bottleneck and limitation of ionic liquids in desulfurization of fuel oils are pointed out. The future development is put forward as well.


Zhao D.-S.,Hebei University of Science and Technology | Zhang Y.,Hebei University of Science and Technology | Ren P.-B.,Shijiazhuang Coking and Chemical Group Co. | Duan E.-H.,Hebei University of Science and Technology | Shen X.-B.,Hebei University of Science and Technology
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2011

TS-1 molecular sieve was modified with acid, alkali, salt, and used in the ammoxidation reaction of methyl ethyl ketone (MEK). The effects of modified material, reaction temperature, molar ratio of raw materials, mass of catalyst, and reaction time on the reaction, reusability and regeneration of the catalyst were investigated. The result shows that Zn(NO3)2-modified TS-1 is the optimum catalyst. The optimum reaction conditions are as follows: reaction temperature 70°C, n(NH3):n(MEK):n(H2O2) =3.5:1:2, 12 g TS-1 for 1 mol MEK, reaction time 2.5 h. Under the optimal reaction conditions, the conversion of methyl ethyl ketone (MEK) is up to 97.9%, and the selectivity of methyl ethyl ketoxime (MEKO) is up to 99.6%. The catalyst can be reused three times, and the catalytic properties of TS-1 can be recovered after calcination at 400°C.


Zhao D.,Hebei University of Science and Technology | Fu L.,Hebei University of Science and Technology | Ren P.,Hebei University of Science and Technology | Ren P.,Shijiazhuang Coking and Chemical Group Co. | And 2 more authors.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2012

N-allylpyridinium chloride ionic liquid ([APy]Cl) was synthesized by one-step process, and its structure was characterized by 1H nuclear magnetic resonance spectrum ( 1H-NMR) and Fourier transform infrared spectra (FT-IR). The dissolubilities of cotton pulp in [APy]Cl/common solvents (dimethylsulfoxide(DMSO), N, N-dimethylformamide(DMF), N, N-dimethylacetamide(DMAc) or pyridine) were measured and compared. The results show that four kinds of compound solvents are excellent solvent for cellulose, and the solubility in [APy]Cl/DMAc is better than in several other solvents under the same conditions. When the content of DMAc is 40%, the solubility of cotton pulp is up to 12.25% at 100°C. The original cellulose and the regenerated cellulose were analyzed by FT-IR, X-ray diffraction(XRD) and thermogravimetric analysis (TGA), respectively. The results show that these compound solvents are non-derivatizing solvents for cellulose and, make the crystal form of regenerated cellulose transform from cellulose I to cellulose II. Furthermore, the regenerated cellulose shows good thermal stability.


Zhao D.-S.,Hebei University of Science and Technology | Li H.,Hebei University of Science and Technology | Fu L.-L.,Hebei University of Science and Technology | Zhang J.,Hebei University of Science and Technology | And 2 more authors.
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2011

The dissolution of cellulose in ionic liquid 1-butyl-3-methylimidazolium acetate ([BMIM] CH3COO) was discussed. The results show that [BMIM] CH3COO can dissolve natural cellulose effectively, and cellulose membrane can be obtained by regeneration. With the dissolution temperature increases, the dissolution time is greatly reduced. The both original cellulose and regenerated cellulose from [BMIM] CH3COO were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetry (TGA) and X-ray diffraction (XRD) measurements. The results show that the novel system is a good non-derivatizing cellulose solution. The crystal type of regenerated cellulose is changed, and the thermostability of regenerated cellulose is slightly decreased and the degree of the polymerization is degraded.


Fu L.-L.,Hebei University of Science and Technology | Zhao D.-S.,Hebei University of Science and Technology | Ren P.-B.,Hebei University of Science and Technology | Ren P.-B.,Shijiazhuang Coking and Chemical Group Co. | And 2 more authors.
Xiandai Huagong/Modern Chemical Industry | Year: 2011

N-Allylpyridinium chloride ionic liquid ([APy] Cl) is synthesized by one-step process. 1H-NMR, FT-IR, MS and DSC-TGA analyzers are used to study its chemical structure and thermal stability. The intermiscibility and water absorption of [APy]Cl are investigated as well. The results show that [APy]Cl ionic liquid is a good solvent for cellulose. The solubility of cotton pulp cellulose (DP=556) and absorbent cotton fiber (DP=1971) is up to 19.71% and 15.29% in ionic liquid at 120°C, respectively. Cellulose after regeneration from [APy] Cl solutions is analyzed by FT-IR, XRD and DSC-TGA analyzers. The result show that [APy]Cl is non-derivatizing solvents for cellulose and the crystal form is transformed from celluloseIto cellulose II.


Zhao D.,Hebei University of Science and Technology | Li J.,Hebei University of Science and Technology | Zhang J.,Hebei University of Science and Technology | Ren P.,Hebei University of Science and Technology | And 4 more authors.
Chinese Journal of Organic Chemistry | Year: 2014

Five metal-based hyamine ionic liquids (CPL-TBAB)/MCln (M=Ni, Cu, Co, Zn, Fe) were synthesized and investigated in extractive desulfurization of model oil. The result indicated that (CPL-TBAB)/CuCl2·2H2O was superior to other ionic liquids for the extraction desulfurization. The removal ratio of dibenzothiophene (DBT) can be up to 97.10% under the optimal reaction conditions having the suitable molar ratio of CPL-TBAB to CuCl2·2H2O being 1:0.8 and VIL/VOIL being 1:1 at room temperature and atmosphere. The extraction ability of ionic liquid decreases only slightly after 6 cycles of reuse. (CPL-TBAB)/0.8CuCl2·2H2O showed an excellent extraction ability for different sulfur compounds model oil and real diesel. The single extractive desulfurization removal ratio of real diesel was 75.59%. These results demonstrate that this metal-based ionic liquid is a promising extractive desulfurization agent. © 2014 Chinese Chemical Society & SIOC, CAS.


Zhao D.,Hebei University of Science and Technology | Liu M.,Hebei University of Science and Technology | Xu Z.,Hebei University of Science and Technology | Zhang J.,Hebei University of Science and Technology | And 4 more authors.
Huagong Xuebao/CIESC Journal | Year: 2012

Seven kinds of ionic liquids, N-methyl-imidazolium bisulfate ([Hmim]HSO 4), 1-butyl-3-methyl imidazole phosphate ([Bmim]H 2PO 4), 1-butyl-3-methyl imidazole bisulfate ([Bmim]HSO 4), 1-butyl-3-methyl imidazole tetrafluoroborate ([Bmim]BF 4), N-butyl-pyridine bisulfate ([Bpy]HSO 4), N-butyl-pyridine phosphate ([Bpy]H 2PO 4), N-ethyl-pyridine bisulfate ([Epy]HSO 4), were designed and synthesized. The synthesis of dimethyl succinate catalyzed by ionic liquids was studied for the first time. It was shown that [Epy]HSO 4 had the best catalytic performance, and optimal conditions for the synthesis of dimethyl succinate were obtained, succinic acid and methanol molar ratio 1:3.0, amount of catalyst 5%(g/g) of succinic acid, reaction temperature 70°C and reaction time 2 h. Under the optimal conditions, the yield of dimethyl succinate was up to 91.83%, esterification rate was 96.32%. The catalyst was recycled 7 times without substantial decrease in activity. Moreover, compared to conventional industrial catalysts, ionic liquid catalyst had the superiority of smaller catalyst dosage, less by-product, mild reaction conditions, high yield, and recycled catalyst usage. Finally, the mechanism of esterification catalyzed by ionic liquids was discussed. © All Rights Reserved.

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