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Ceramic high temperature anti-oxidation coating has good high temperature and anti-oxidation effect
Time of Update: 2021-08-14
Zhisheng Weihua high-temperature coating experts pointed out that metal high-temperature corrosion oxidation This will cause the embrittlement layer of the metal, and the metal indicators such as hardness, strength, and toughness will drop greatly, causing equipment damage, pipeline leakage, product pollution, causing malignant accidents such as combustion or explosion, and serious waste of resources and energy.
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FSHW: Changes in protein oxidation, lipid oxidation and lipolyticity of Chinese dry sausages with different salt contents of sodium chloride
Time of Update: 2020-12-12
6 Changes in LOX activity during the processing of dried sausages Conclusion study shows that The content of NaCl pickled salts has a significant effect on protein oxidation, lipid oxidation and lipolyticity in dry sausage production in China, and adjusting NaCl concentrations can increase enzyme activity and ultimately lipid hydrolyzing and oxidation.
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Progress in selective oxidation of methane
Time of Update: 2022-04-25
The research team developed a gold (Au) supported ZSM-5 molecular sieve (Au/ZSM-5) catalyst to realize the catalytic reaction process of catalyzing the highly selective oxidation of methane to methanol and acetic acid under oxygen conditions.
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New progress in chemical chain ammonia oxidation to nitric oxide
Time of Update: 2022-04-20
Since the early twentieth century, the Ostwald Process for the selective oxidation of ammonia gas to nitric oxide using platinum group metal alloys as catalysts has been considered the industry standard for the production of nitric acid .
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Sulfide oxidation reaction induces diamond formation
Time of Update: 2022-02-25
According to a geological study published on the 21st in the British journal Nature Communications, the oxidation reaction of sulfide in the mantle may induce the formation of diamonds .
This discovery constitutes a direct evidence that diamonds nucleated on top of sulfides in the mantle .
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Chinese scholars and overseas collaborators have made progress in the research on selective oxidation of methane
Time of Update: 2022-02-22
In response to the above problems, the researchers developed a ZSM-5 supported Au catalyst, which uses O2 to selectively oxidize methane to methanol and acetic acid under mild conditions at 120-240 °C.
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One-step oxidation of methanol to methylal
Time of Update: 2022-02-16
? Methanol one-step selective oxidation synthesis of methylal technology breaks through the traditional methanol-formaldehyde condensation process, develops a new type of fixed bed process route that uses cheap coal-based methanol as raw material to directly oxidize methylal in one step, and uses environmentally friendly acidic zeolites And V/Ti-based catalyst, air is used as oxidant to directly convert methanol into methylal with high selectivity .
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"Low-temperature catalytic oxidation VOCs treatment technology" successfully completed the field test
Time of Update: 2022-01-27
A few days ago, the China Petroleum Science and Technology Management Department project "Low-temperature catalytic oxidation method VOCs treatment technology sideline test" undertaken by the Lanzhou Chemical Research Center of the Petrochemical Research Institute successfully completed the field test and research in the styrene butadiene workshop of the rubber plant of the Lanzhou Petrochemical Company.
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Science of Qin Wei, University of Oklahoma: Archaeal ammonia oxidation in an oxygen-free world
Time of Update: 2022-01-26
used ultra-sensitive dissolved oxygen probes and isotope tracer technology to demonstrate for the first time that marine AOA (Nitrosopumilus maritimus SCM1) can generate its own oxygen for its ammonia oxidation under anoxic conditions, and at the same time convert nitrite.
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Determination of trace sulfur in light olefins by oxidation microcoulometric method (2)
Time of Update: 2022-01-06
Figure 1 1- Combustion furnace: 2- Combustion tube: 3- Titration cell: 4- Electromagnetic stirrer: 5- Microcoulometer; 6-Data processing device5.
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Determination of trace sulfur in light olefins by oxidation microcoulometric method (1)
Time of Update: 2022-01-06
2 Reference standardsGB 676 Chemical reagent glacial acidGB 1272 Chemical Reagent Potassium IodideGB 6601 Pyrolysis C4 Liquid Sampling Method for Industrial UseGB 7715 Industrial EthyleneGB 7716 Industrial Propylene3 Principles of the methodThe sample is brought into the combustion tube by the carrier gas and mixed with oxygen and burned.
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Determination of trace sulfur in light olefins by oxidation microcoulometric method (3)
Time of Update: 2022-01-06
First use a 10uL micro syringe to draw about 8uL of organic sulfur standard solution, dry the needle, and then slowly pull the needle core until the meniscus at the junction of the liquid and air is aligned with the 1uL scale, and note the position of the needle core end The reading (V1) .
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Determination of trace sulfur in light olefins by oxidation microcoulometric method (4)
Time of Update: 2022-01-06
1 Analysis resultsFor any light olefin sample, the arithmetic average of three repeated measurements shall be used to express the analysis result .
8. 2 RepeatabilityThe same operator uses the same instrument to perform two repeated tests on the same sample under the same conditions.
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Benzoic acid preparation benzyl alcohol oxidation method
Time of Update: 2021-12-07
0 g of tungstic acid to a 500 mL flat-bottomed flask , stir the magnet, install it on a magnetic stirrer with a water bath, heat the water bath to 60°C, add 18 mL of 30% hydrogen peroxide , and start stirring .
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Benzoic acid preparation toluene oxidation method
Time of Update: 2021-12-07
Toluene is under the action of oxidant potassium permanganate and phase transfer catalyst tetrabutylammonium bromide (TBAB) to produce potassium benzoate; potassium benzoate is acidified with concentrated hydrochloric acid to produce water-insoluble solid benzoic acid .
