The qualified rate of refined propylene increased from 44.6% to 100%,the consumption rates of ash and primary catalyst decreased from 0.05% and 0.094kg/t to 0.02% and 0.070 kg/t respectively.
The fertilizer experiment in the field showed that refined organic fertilizer could improve markedly yield and quality of flowering Chinese cabbage, increase yield 29.1%~40.6%, Vc 8.6%~17.1%, soluble solid 60.0%, reducing sugar 13.5%, sucrose 31.4%, full sugar 22.0%.
The carbides can be refined by two pretreatments,respectively,heating at 1 050 ℃ for 30 min+oil quenching+isothermal treatment at 300 ℃ for 3 h+air cooling+tempering at 720 ℃ for 2 h,heating at 1 050 ℃ for 30 min+oil quenching+tempering at 720 ℃ for 2 h.
Ti-6Al-4V and Ti-SAl-2.5Fe alloys treated by the process show much refined microstructures, and the yield strength, ultimate strength and elongation increase by 8—15, 5—13 and 7—14% respectively.
Results of the study are as follows:1. Additional of minor Sc to 3~# alloy Al-7.60Zn-2.30Mg-1.30Cu-0.15Zr leads to the precipitation of secondary Al_3(Sc, Zr) particles during solidification, which have a powerful grain refining effect, so the cast grain size of alloy 3~# is apparently refined and the even grain size is about 20-30um.
The results show that 0.3%~0.8% C_2Cl_6 addition in the AZ91 magnesium alloy can obviously refine the grain average size of α-phase from 106 μm to about 53 μm and decrease the grain area, where the best refined effects can be observed with 0.3% C_2Cl_6 addition.
Under the optimum experimental conditions, the yield of L-tetrahydrofurfuryl lactate was 82.68%, the yield of refined ester was 76.02%, and chemical purity, optical purity of production was 97.84%, 97.62%.
Under the optimum experimental conditions,the yield of L-tetrahydrofurfuryl lactate was 82.68%,the yield of refined ester was 76.02%,and chemical purity, optical purity of production was 97.84%, 97.62%.
The refined structural parameters indicate that in Mg-Cr2+ olivines Cr2+is almost randomly distributed over the two non-equivalent octahedral sites (M1 and M2) ;
~3,Z=4,D_c=1.36g/cm~3.The structure was solved by the direct methods(MULTAN 82)and refined by blockmatrix least squares methods,giving final R=0.059 and R_w=0.068.The single crystal X-ray diffraction revealed that the claster core of complex 1consists of two iron and two sulfur atoms and belongs to a kind of butterfly structure.
~3,Z=4,D_o=1.36g/cm~3.晶体结构用直接法(MULTAN 82)测定,采用块矩阵最小二乘法进行最终结构精化,最后偏离因子 R=0.059,R_w=0.068.单晶 X 射线分析表明,配合物1的簇核是由两个铁原子和两个硫原子组成的蝴蝶式结构;
Certain hypotheses concerning optimal control are refined and the relationship between the Pontryagin maximum principle and Bellman's dynamic programming method in the context of these hypotheses is discussed.
Malyugin on linearization of arithmetical models of logical functions are interpreted and refined from the viewpoint of modern techniques of logical design of integral circuits and nearest neighbor technologies.