1.4.2.3 The opposite method of solid phase called phase reaction method is used less frequently, and it seems to be taken seriously in recent years.
Thermal decomposition of gold salt. An older method of preparing metal oxide nanoparticles. Recently, nano metal particles have been prepared by the thermal decomposition of metal organic compounds, and protected by polymers, the presence of monodispersed particles, that is, in the presence of 1.3.1.1 can be obtained. Ultrasonic treatment, nickel carbonyl 4 and the resulting nano-particles deposited on the alumina surface, the particles and germanium telluride surface junction can not be made (4) poly-mechanochemical polymerization can also be prepared nanoparticles. For example, a high-energy ball mill processes nanometer-sized materials; nano-iron-iron-zinc homogenization 216204 can be obtained, and the metal analyte-destroyed materials can be treated with shock waves, and nano-particles can also be mixed, for example, 21 pounds 6203 or 0 out of 6203. The material is a raw material, and after the shock wave treatment, zinc nano-iron ferrite or nickel ferrite can be obtained. Besides the above-mentioned method, liquid, reactive gas-solid reaction, and gas-liquid reaction are used, and are not described here.
Zhai Shouting's editor will introduce the preparation method of nano-materials in the next phase. Comprehensive preparation method Gas-phase preparation of a new type of sulphonated leather fatliquor Zhejiang Pro-Technology Co., Ltd. cooperated with Shaanxi University of Science and Technology to report on the key scientific and technological projects of Zhejiang Science and Technology Department. Development and research of leather-based fatliquor, project number 2,2,1702053. The main task of this project is to use sulfur oxide gas phase membrane technology to develop new sulfonated oil products and be used in the sulphonation of high-grade leather fatliquors. produce. Currently. Most of the high-grade leather fatliquors produced by foreign companies are sulfonated fatliquors. In the decade of the 10th century, there were reports of the industrial production of fatliquor by the 8,5 gas-phase membrane sulfonation process. 8,3 The gas phase membrane sulfonation process is currently the world's most advanced sulfonation process. The research and application of this technology to the production of sulphonated leather fatliquors is currently a blank in China. The introduction of oxidizing sulfur sulphonation technology into the development of leather fatliquors is a very significant undertaking, not only helping to narrow the gap between the varieties and quality of leather fatliquor products in developed countries. And it will help improve the competitiveness of China's fatliquor leather chemicals in the tanning industry.
This will have a positive impact on both leather manufacturers and tanneries.
After two years of attack and technology. Peeling journals have already broken through the search. Small test physicochemical indicators of the samples as well. After the work of fatliquoring performance has reached the level of similar foreign products. At present, technicians are working on the pilot plant with an annual production capacity of 3 tons of research equipment. Some key equipment improvements have already been carried out on the original 8,3 gas-phase membrane sulfonation equipment. It is expected that by the end of 2002, industrialized products of sulfonated oils and fats will be produced, which will provide a new class of fatliquor component materials for the domestic leather chemical production industry.
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