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The Production Process of 2,3-Diamino-5-trifluoromethylpyridine
Time of Update: 2023-05-06
These include: Control of reaction conditions: The condensation reaction that forms TFMP must be carefully controlled to ensure that the reaction proceeds smoothly and efficiently, without excessive side reactions or unwanted byproducts.
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Summary of copper prices in major cities across the country on February 29
Time of Update: 2022-11-29
market name of article Material Price range Change remark Yangtze River spot 1# Copper 1 # 35850-35890 Yuan/ton 300 Tax included Guangdong spot 1# Copper 1 # 35810-36010 Yuan/ton 280 Tax included Hua
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Explosion-proof Industrial Small Weather Station - New Automatic Weather Station 2022 Updated (News/News
Time of Update: 2022-09-21
25%) ;( Beijing Meteorological Bureau calibration certificate)JD-CQXP explosion-proof industrial small weather station - new automatic weather station 2022 has been updated (news / dynamics), [Shandong Jingdao Optoelectronic Manufacturers] the temperature, relative humidity, precipitation data of the two sets of automatic weather stations, through the use of S S software and the continuity of the data value analysis, the consistency of the data of the new and old automatic weather stations was studied.
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With a total investment of 1.36 billion yuan, the 200,000-ton cyclohexanone plant in Henan was successfully driven once
Time of Update: 2022-08-29
It took more than 2 years, and the cyclohexanone plant was successfully driven at one time!Project OverviewProject OverviewThe annual output of 200,000 tons of cyclohexanone is invested and constructed by Henan Shoushan Chemical Technology Co.
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Product performance and production principle of lactic acid
Time of Update: 2021-08-15
3) Acetaldehyde hydrocyanic acid methodAcetaldehyde reacts with hydrocyanic acid to form lactonitrile, which is then hydrolyzed to obtain crude lactic acid .
Technical formula (kg/t)1) Fermentation method2) Acrylonitrile method3) Acetaldehyde hydrocyanic acid method
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Cholic acid product standards and uses
Time of Update: 2021-08-14
Take 1mL of the sample solution, add 1mL of freshly prepared 1% furfural aqueous solution, place in an ice bath for 5min, add 13mL of sulfuric acid solution, keep in a 70℃ water bath for 10min, take it out, immediately place in an ice bath for 2min, and measure the absorbance at a wavelength of 620mm , And check the corresponding amount of bile acid from the standard curve .
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Production process and product standard of 2-ethylhexanoic acid
Time of Update: 2021-08-11
. Spin filtration, wash twice with water, acidify the filtrate with 31mol/L sulfuric acid to pH 1-2, divide the oil layer, distill under reduced pressure, collect the fraction of 110～130℃/20×133.
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The future market trend of brand engineering paint: comprehensive competitiveness is the key
Time of Update: 2021-02-02
China Coatings Network News: HC Coatings Network News: At present, China's building coatings production and processing enterprises generally overcapacity, formula technology update innovation abil
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Hubei Submarine Quality Supervision Bureau to carry out special law enforcement inspection of building waterproof coil products
Time of Update: 2020-09-27
In order to ensure the effectiveness of this special inspection, the Bureau requires that the 12365 complaints hotline be fully utilized, social forces should be mobilized to participate in supervision, and clues of illegal and criminal acts should be found in a timely manner;
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Coating classification: synthetic polymer waterproof coating
Time of Update: 2020-04-03
Key tips: brief introduction of synthetic polymer waterproof coating products The synthetic polymer waterborne emulsion waterproof coating is made of many polymeric polymeric materials as the main fil
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WACKER's new cement and concrete technology capability center in Shanghai to help the silicone industry grow
Time of Update: 2019-04-17
China is the world's largest producer and consumer of cement and concrete However, under pressure from high energy consumption, market demand for environmentally friendly products and CO2 reduction,
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Aromatic health care providers, pet doctors and other new occupations recognized by the state
Time of Update: 2008-11-03
Introduction: Xinhuanet, Beijing, October 26 (reporter Cui Qingxin) with the progress of science and technology, fashion and health concept deeply rooted in the hearts of the people, a number of emerg
