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The physical and chemical properties and preparation methods of zeolite (1)
Time of Update: 2021-11-15
as raw materials, mixed with specific impurity elements, and prepared by hydrothermal synthesis under normal pressure There are different types of zeolites .
① The raw materials used in this method of hydrothermal synthesis are alkali, alumina, silica and water .
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Silica gel physical and chemical properties and preparation method
Time of Update: 2021-11-15
After steam aging, sulfuric acid exchange, oil bleaching, water washing, The product is obtained through the steps of drying and screening .
2% dilute sulfuric acid solution for 12 hours in a washing tank, and then use a 0.
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The physical and chemical properties and preparation methods of zeolite (3)
Time of Update: 2021-11-15
Inorganic salt treatment is to soak in salt solution to increase the ion exchange capacity of zeolite, thereby improving the adsorption and cation exchange performance of natural zeolite .
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Tannin's physical and chemical properties and preparation methods
Time of Update: 2021-11-14
Tannin compounds are generally extracted with a mixture of water and organic solvents, and the concentration of organic solvents is usually 50% to 75%.
The most commonly used hydrolyzed tannin extraction system is the acetone-water system, followed by organic solvents such as methanol, ethanol, and ether.
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The physical properties and preparation methods of chitin resins
Time of Update: 2021-11-14
Chitin adsorption of metal ions (Ni 2+ ) as a carrier for catalytic oxidation treatment of cyanide-containing wastewater is feasible, and the cyanide removal rate is over 99% .
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The physical and chemical properties and preparation methods of polyethylene oxide (PEO)
Time of Update: 2021-10-21
In the process of preparing PEO by heterogeneous catalytic polymerization, the heterogeneous catalytic systems used include aluminum alkoxide-acetyl ketene system, aluminum alkyl-water-acetylacetone system and rare earth compound-triisobutyl aluminum-water catalyst system and so on .
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Dalian Institute of Chemical Physics, Chinese Academy of Sciences proposes a new non-targeted
Time of Update: 2021-09-28
Editor in charge: Food Science 0 Recently, Xu Guowang, a researcher in the High Resolution Separation Analysis and Metabolomics Research Group of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, made new progress in the research of non-targeted screening technology for risk substances in food, and systematically studied the mass spectrometry of veterinary drugs and their corresponding metabolites.
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Choice of food physical and chemical testing methods
Time of Update: 2021-09-16
One of the tasks of food physical and chemical testing is to provide accurate and reliable testing data. Choosing an appropriate testing method is the prerequisite and basis for obtaining correct tes
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Physical and Chemical Immobilization Methods of Photosynthetic Materials
Time of Update: 2020-11-16
Isolated photosynthetic materials have a relatively short active life time that limits their effective use.
The immobilization methods are identified either as chemical or physical procedures depending on whether covalent bonds are established or not.
Different immobilization procedures in relation with various photosynthetic materials are mentioned.
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Physical and chemical methods to inhibit oxygen blocking.
Time of Update: 2020-10-07
Since the vast majority of photo-curing processes are carried out in the air environment, and the main applications are coatings and inks with large surface area/volume ratio of materials, so O2 on photo-curing material free-based polymerization reaction of the blocking effect can not be ignored.
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Nano crusher different from general physical method
Time of Update: 2013-03-14
We know that nanocrushers can crush very small substances It is difficult to make materials reach nanometer level by general physical methods, but it depends on the characteristics of materials As one
