Worldwide shortage of energy resources and environmental degradation has become a bottleneck which constraints the development of petroleum and chemical industry
At the same time, due to the environmentally friendly production process and biodegradable characteristic of biomass fine chemicals, they are more widely used. After 20 years of cultivation and development, biomass raw materials fine chemicals are gradually forming industrial clusters.
Range of biological resources as raw materials, fine chemical species in the world attention-scale production of the main sugar-based biomass fine chemicals, fine chemicals starch, cellulose hemicellulose, fine chemicals, lignin in fine chemicals and fats and oils of fine chemicals and other development soon.
Starch is a polysaccharide family the largest output of one, by the preparation of various additives is widely used in paper, textile, food, fodder, and medicine, daily chemical, petrochemical and other industries. The starch-based fine chemicals can be used as a flocculant of heavy metal ions, the effective elimination of all types of heavy metals in the production and application of pollution on the environment can not be repaired. Foreign water treatment agent on the market, there are many modified starch flocculant has been widely used in China is still in the research and development stage. The present fine chemicals suppliers have more than 20 million tons / year of modified starch production, but the vast majority of poor performance, can be used to replace petroleum based fine chemicals, high performance starch production can not meet the market demand. Actively promote the development of new technology of starch processing, and strive to develop a modified starch applications is an important task.
Sorbitol from glucose hydrogenation system, too, can be used to synthesis of monoester, diester and triester and other fine chemical products, including a well-known hydrophilic non-ionic emulsifier. Heating sorbitol under acidic conditions and esterification of fatty acids obtained sorbitan ester. The low toxicity of the substance, without stimulation, conducive to digestion and is widely used as food, beverage and pharmaceutical emulsification and solubilization can also be used for the production of synthetic fibers, and cosmetics.
Alkyl glycoside is glucose in the acid catalyst, water loss from the product. It has excellent ecological and toxicological characteristics, and superior physical and chemical triphenyl bismuth properties and compatibility performance; especially its low toxicity and skin compatibility and biodegradability, etc., better than the moment a class of non-biomass surfactants. Therefore, the biomass of fine chemicals, especially for contact with human skin, cleaning supplies and personal protective equipment, in areas such as food, pharmaceutical, fiber and agricultural chemicals can also be used as functional additives.
Sucrose ester is a complex mixture of sucrose and fatty acid esters in the alkaline catalyst, obtained by transesterification of sucrose monoester, diester, ester. It has quite good performance with alkyl glucoside detergents, soaps, bath, cosmetics, oral cleaning agent, fiber or fabric additives, agricultural chemicals additives, enzyme preparations and fresh fruits and vegetables, etc. has broad application prospects, but also for the preparation of solid dispersions, plastics additives.
Chemical catalytic hydrogenation of the production of xylitol, not only the process is complex, poor security, but also must be based on pure xylose as raw materials, high cost. China has now produced a purity of more than 99% of xylitol. The principle of the biological production of xylitol is the use of xylose reductase within the cells, to restore the xylose xylitol. In addition, the biotransformation law allows cells continuous repeated use repeatedly and without aseptic lowers the cost of fermentation, and also reduces the investment in equipment and operating costs, but also simplifies the process of post-processing copper chromite (CC). The process at room temperature and atmospheric pressure, with low energy consumption, simple equipment and safe operation.
While there is a strong demand for organic substances of biological resources manufacture, biological resources can not be directly used as chemical raw materials. Their homogeneity is also a problem. Though the thermochemical conversion, biological transformation, chemical transformation or other means, transferring efficient biomass resources, large-scale conversion to more variety of fine chemicals becomes the industries’ study subject with urgent need.
Source:http://www.mhcfm.com
The application of tungsten in various industries
Steel Industry Most of tungsten applied in the production of special steels. The widely used high-speed steel was containing 9-24% of tungsten, 3.8-4.6% of chromium, 1-5% of vanadium, 4-7% of cobalt, 0.7-1.5% of carbon.
Magic effects of coconut oil
According to records, coconut oil can be regarded as the nobility of skin care plant extracts. It was rich in exotic tension of tropical plants, which can enhance the contractile force of the pores, perfectly beautify and nourish the skin.
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Nano-aluminum powder, a material with remarkable properties due to its minuscule particle size, is revolutionizing various industries with its high reactivity and large specific surface area. Unlike its bulk counterpart, nano-aluminum powder begins to oxidize at a lower temperature of 550°C, compared to the 950°C oxidation point of ordinary aluminum. This lower ignition energy and full combustion without apparent cohesion make it a superior choice for applications requiring high energy and efficiency. The unique characteristics of nano-aluminum powder, such as faster burning rates and greater heat release, are largely influenced by its synthesis method, which determines its particle size, surface area, and shape.
