The Shanxi Sanwei Group Co., Ltd. intends to invest around 820 million RMB in the construction of a 9-kt/a coal gasifica-tion unit and a 30 kt/a polytetrahydrofuran expansion project,
The Shaanxi Bidiou Chemical Company, Ltd. signed with the American Frontech Company a contract on licensing by the American Company the technology to the 30 kt/a 1,4 butanediol （BDO） project. This project is the fir...The Shaanxi Bidiou Chemical Company, Ltd. signed with the American Frontech Company a contract on licensing by the American Company the technology to the 30 kt/a 1,4 butanediol （BDO） project. This project is the first BDO project in Shaanxi province constructed by the Shaanxi Bidiou Chemical Company using the existing methanol and hydrogen as the feedstocks provided by Shaanhua Chemical Fertilizer Company, Ltd.展开更多
The foundation stone laying ceremony for the 25 kt/a 1,4-butanediol project, in which Sichuan Tianhua Company Ltd.,Luzhou Gas Chemicals Group Company Ltd., Sichuan Chemical Company Ltd., Sichuan Investment Holdings Ltd.
The Davy Process Technology （DPT） Company in January 2007 had transferred the technology for production of 1,4- butandiol to two Chinese companies. The first one is the Blue Star Chemical ＆ New Material Stock Co., ...The Davy Process Technology （DPT） Company in January 2007 had transferred the technology for production of 1,4- butandiol to two Chinese companies. The first one is the Blue Star Chemical ＆ New Material Stock Co., Ltd., which will construct a 55 kt/a 1,4-butandiol unit in Nanjing, using maleic anhydride as the starting material to manufacture 1,4- butandiol and tetrahydrofuran by means of the ester hydrogenation technique licensed by DPT. The feedstock needed by this project will be provided by local producer and this unit is scheduled to come on stream by the fourth quarter of 2008. The second licensee is the Shanxi Sanwei Group, which will construct a 70 kt/a 1,4-butandiol unit in Hongtong county using the similar technology to manufacture 1,4-butandiol and g-butyrolactone. The starting material-maleic anhydride-will be sourced from the nearby producer, and construction of this project is slated to be completed by the fourth quarter of 2007.展开更多
In this paper,high cis-1,4 content hydroxyl-terminated polybutadiene(cis-HTPB)with different molecular weights was prepared through the oxidative cracking process using cis-butadiene rubber as raw material.Firstly,thi...In this paper,high cis-1,4 content hydroxyl-terminated polybutadiene(cis-HTPB)with different molecular weights was prepared through the oxidative cracking process using cis-butadiene rubber as raw material.Firstly,this article comprehensively compared the differences between cis-HTPB and conventional I-HTPB in terms of molecular weight distribution,functionality,viscosity,molecular polarity,and other physicochemical properties,which provided effective data support for its subsequent application.In addition,the reaction kinetics study showed that cis-HTPB with isocyanate curing agent has high reactivity,allowing it to be rapidly cured at low temperatures,and the cured elastomers had excellent mechanical properties,with tensile strength and elongation up to 1.89 MPa and 1100%,respectively.It was also found that cis-HTPB has extremely excellent low-temperature resistance,and the glass transition temperature(T_(g))of its cured elastomer is as low as-101℃.Based on the above studies,cis-HTPB is applied as a binder in composite solid propellants for the first time to investigate its practical performance,and the results indicated that cis-HTPB-based propellants have excellent process and mechanical properties.展开更多
A series of ferrocenyl 1,4 dihydropyridines were synthesized with high yields by a one pot cyclocondensation of formylferrocene,β ketoester and urea(or methyl 3 aminocrotonate) on the surface of SiO 2 under microwave...A series of ferrocenyl 1,4 dihydropyridines were synthesized with high yields by a one pot cyclocondensation of formylferrocene,β ketoester and urea(or methyl 3 aminocrotonate) on the surface of SiO 2 under microwave irradiation without solvent.All products were characterized by EA,IR, and 1 HNMR.展开更多
文摘The Shanxi Sanwei Group Co., Ltd. intends to invest around 820 million RMB in the construction of a 9-kt/a coal gasifica-tion unit and a 30 kt/a polytetrahydrofuran expansion project,
文摘The Shaanxi Bidiou Chemical Company, Ltd. signed with the American Frontech Company a contract on licensing by the American Company the technology to the 30 kt/a 1,4 butanediol （BDO） project. This project is the first BDO project in Shaanxi province constructed by the Shaanxi Bidiou Chemical Company using the existing methanol and hydrogen as the feedstocks provided by Shaanhua Chemical Fertilizer Company, Ltd.
文摘The foundation stone laying ceremony for the 25 kt/a 1,4-butanediol project, in which Sichuan Tianhua Company Ltd.,Luzhou Gas Chemicals Group Company Ltd., Sichuan Chemical Company Ltd., Sichuan Investment Holdings Ltd.
文摘The Davy Process Technology （DPT） Company in January 2007 had transferred the technology for production of 1,4- butandiol to two Chinese companies. The first one is the Blue Star Chemical ＆ New Material Stock Co., Ltd., which will construct a 55 kt/a 1,4-butandiol unit in Nanjing, using maleic anhydride as the starting material to manufacture 1,4- butandiol and tetrahydrofuran by means of the ester hydrogenation technique licensed by DPT. The feedstock needed by this project will be provided by local producer and this unit is scheduled to come on stream by the fourth quarter of 2008. The second licensee is the Shanxi Sanwei Group, which will construct a 70 kt/a 1,4-butandiol unit in Hongtong county using the similar technology to manufacture 1,4-butandiol and g-butyrolactone. The starting material-maleic anhydride-will be sourced from the nearby producer, and construction of this project is slated to be completed by the fourth quarter of 2007.
基金the support from the Open Research Fund Program of Science and Technology on Aerospace Chemical Power Laboratory(Grant No.STACPL120221B03)the National Natural Science Foundation of China(Grant No.22175059).
文摘In this paper,high cis-1,4 content hydroxyl-terminated polybutadiene(cis-HTPB)with different molecular weights was prepared through the oxidative cracking process using cis-butadiene rubber as raw material.Firstly,this article comprehensively compared the differences between cis-HTPB and conventional I-HTPB in terms of molecular weight distribution,functionality,viscosity,molecular polarity,and other physicochemical properties,which provided effective data support for its subsequent application.In addition,the reaction kinetics study showed that cis-HTPB with isocyanate curing agent has high reactivity,allowing it to be rapidly cured at low temperatures,and the cured elastomers had excellent mechanical properties,with tensile strength and elongation up to 1.89 MPa and 1100%,respectively.It was also found that cis-HTPB has extremely excellent low-temperature resistance,and the glass transition temperature(T_(g))of its cured elastomer is as low as-101℃.Based on the above studies,cis-HTPB is applied as a binder in composite solid propellants for the first time to investigate its practical performance,and the results indicated that cis-HTPB-based propellants have excellent process and mechanical properties.
文摘A series of ferrocenyl 1,4 dihydropyridines were synthesized with high yields by a one pot cyclocondensation of formylferrocene,β ketoester and urea(or methyl 3 aminocrotonate) on the surface of SiO 2 under microwave irradiation without solvent.All products were characterized by EA,IR, and 1 HNMR.
