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Issue 41, 2013 - Xinjiang Institute of Physics and Chemistry Propylene alcohol separation and purification method was authorized
Time of Update: 2022-11-12
(Li Fang) The separation and purification method of propenol from Xinjiang Institute of Physics and Chemical Technology was authorizedA separation and purification method of propenol invented by Xinjiang Institute of Physical and Chemical Technology of the Chinese Academy of Sciences has been authorized by the national invention patent.
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Introduction to test methods for various physical and chemical properties of wood-based panels
Time of Update: 2022-10-20
MWD-10B electronic wood-based panel universal testing machine is developed for various physical and chemical properties test tests of wood-based panels and veneer wood-based panels, which can meet GB17657-1999 "Physical and chemical properties test methods for wood-based panels and veneer wood-based panels", and carry out internal bonding strength, surface bonding strength, surface bonding strength, tensile strength, bending resistance, static flexural strength and elastic modulus, screw holding force and wood-based panel shear and other tests.
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Physical Method for Elimination of Interference in Bacterial Endotoxin Examination by Gel Method
Time of Update: 2022-08-30
[2] tested the bacterial endotoxin in garlic injection and showed that the interference could be eliminated by diluting the test sample 10 times .
[2] tested the bacterial endotoxin in garlic injection and showed that the interference could be eliminated by diluting the test sample 10 times .
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Polycrystalline powder test method of crystal electro-optical coefficient proposed by Fujian Institute of Physics
Time of Update: 2022-06-13
Under the guidance of this method, the researchers explored and screened the potential electro-optical crystal CsLiMoO 4 (CLM), and obtained high-quality large CLM crystals with the help of the Czochralski growth technology to further study the electro-optical properties of CLM crystals .
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Preparation method of physical and chemical properties of 2,2-bromocyanoacetamide (DBNPA)
Time of Update: 2022-01-04
Br 2 and cyanoacetamide were heated to reflux to prepare DBNPA, which greatly shortened the reaction time and oxidized the by-product HBr to Br.
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Dalian Institute of Physics, Chinese Academy of Sciences develops a new method for synthesizing copolyester monomers from raw materials
Time of Update: 2021-12-26
Recently, the academician of the Chinese Academy of Sciences and the research team of the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences have developed a new method for synthesizing copolyester monomers from biomass using acetaldehyde and acrylate.
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A new method for the synthesis of methylcyclopentadiene from cellulose invented by Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Time of Update: 2021-12-13
Recently, the team of Researcher Li Ning and Academician Zhang Tao from the Catalysis and New Materials Laboratory of Dalian Institute of Chemical Physics, Chinese Academy of Sciences successfully realized the direct hydrodeoxygenation of cellulose-based 3-methyl-2-cyclopentenone (MCP) to methyl cyclopentadiene This work has opened up a new path for the direct conversion of unsaturated ketones to conjugated dienes .
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Polyacrylic acid (PAA) physical and chemical properties and preparation method
Time of Update: 2021-12-09
A stoichiometric amount of ammonium persulfate is made into a dilute solution with a metered amount of water and placed in a dropping funnel on the polymerization reactor.
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Physical and chemical properties of maleic anhydride-acrylamide copolymer and preparation method
Time of Update: 2021-12-08
[Application] The maleic anhydride-acrylamide copolymer has high scale inhibition efficiency, good thermal stability, low environmental pollution, high calcium tolerance, wide pH application range, and good synergistic effect.
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Preparation method and physical and chemical properties of sodium polystyrene sulfonate
Time of Update: 2021-12-08
(1) Sodium styrene sulfonate monomer solution polymerization method①The preparation of sodium styrene sulfonate uses 98% concentrated sulfuric acid as the sulfonating agent, Ag 2 SO 4 as the catalyst, and hydroquinone as the polymerization inhibitor .
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The physical and chemical properties of aniline and its preparation method
Time of Update: 2021-12-07
The mixed gas enters the bottom of the fluidized bed reactor after being heated, and is evenly distributed into the catalyst layer, reacts at 240-370°C to form aniline, and condenses and separates crude aniline .
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PTX-4 corrosion inhibitor physical and chemical properties and preparation method
Time of Update: 2021-12-06
PTX-4 corrosion inhibitor[Physical and chemical properties] The main ingredient of this product is alkyl benzene polyoxyethylene ether phosphate, which is an orange-yellow oily viscous liquid .
Related Links: YSH-05 High Temperature Acidizing Corrosion Inhibitor
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The physical and chemical properties of sodium molybdate and its preparation method
Time of Update: 2021-12-05
Figure 6-11 Production process of sodium molybdate(1) Preparation example 1The calcine was prepared under the roasting conditions of 650℃ and 2.
The process flow of producing sodium molybdate from molybdenum tailings is shown in Figure 6-12 .
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The physical and chemical properties and preparation methods of zeolite (2)
Time of Update: 2021-11-15
The Na-type zeolite prepared by modifying natural clinoptilolite with NaCl solution has a good removal effect on phenol in water .
⑥Ca-type zeolite: Treat natural zeolite with 2mol/L CaCl 2 solution, and then use 2mol/L NH 4 Cl solution as stripping agent, and its cation exchange capacity can reach 59mmol/100g .
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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.
