Applied Technology

Better Catalyst for High Quality Lube Base Oil

Recently, the hydroisomerizing dewaxing catalyst for producing lube base oil and packaged technology with home grown intellectual property right co-developed by the Dalian Institute of Chemical Physics and the PetroChina Research Institute of Petrochemical Technology was successfully applied to the 200,000T/year high-pressure hydrogenation unit of PetroChina Daqing Refining and Chemical Company. This unit can treat 200,000T Daqing high wax content vacuum gas oil and produce over 150,000T high-grade lube base oil, realize an output value of nearly 2 billion Yuan and is expected to bring benefits valuing over 600 million RMB yuan to the enterprise every year. The successful application of this catalyst filled a gap in domestic technological field. The successful development of the hydroisomerization dewaxing catalyst has benefited from jointly tackling crucial issues by and united efforts of the Dalian Institute of Chemical Physics, PetroChina Research Institute of Petrochemical Technology, PetroChina Daqing Refining and Chemical Company and other institutions. The industrial application of this catalyst greatly increases the technological level of China in the production of high-grade lube base oil. In 2008, the consumption of lube oil reached 7.8 million tons and its market size reaches nearly 100 billion yuan in China, which ranked the second in the world.

DDS Chip Realized Ultra-High Speed

Recently, the HBT ultra-high speed circuit team of the Microwave Device and Integrated Circuit Laboratory, the Institute of Microelectronics, CAS, headed by Prof. Liu Xinyu and Prof. Jin Zhi, successfully developed two 8-bit ultra-high speed direct digital frequency-synthesizer (DDS) chips (DDS1 and DDS2) based on 1um GaAs HBT technology. The results of test showed that DDS1 can normally operate under an internal clock frequency above 10GHz and the spurious-free dynamic range within the range of DC-5GHz output frequency is 26dBc; DDS2 can normally operate under an internal clock frequency above 5GHz and the spurious-free dynamic range within the range of DC-2.5GHz output frequency is 45dBc. The DDS1 circuit integrated about 2,000 GaAs HBT transistors and the area of chip is 2.4mm*2.0mm. The DDS2 circuit integrated about 2,000 GaAs HBT transistors and the area of chip is 2.4mm*2.0mm. The results of on-wafer test showed that DDS2 operates normally at a clock frequency of 5GHz. Under the control of 8-bit frequency tuning word, DDS2 can output sinusoidal wave form which frequency ranges between DC and 2.5GHz; the frequency resolution is 19.5MHz; the spurious-free dynamic range is 45dBc, approaching the theoretical calculating value 48dBc. The operating voltage of DDS2 chip is -5.1V, and its operating current is 800mA and its power consumption is 4W.