Manganese chloride dehydration method and method for promoting (cyclopentadienyl)manganese compound yield

A technology of manganese compounds and manganese chloride, applied in chemical instruments and methods, manganese halides, metallocenes, etc., can solve problems affecting the yield of manganese compounds, and achieve the effect of improving the yield of reaction

Active Publication Date: 2007-05-30
宜兴市创新精细化工有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

It is actually found in industrial production that sodium cyanocene is very sensitive to moisture, even the presence of a very small amount of water in the reaction environment or raw materials will affect the yield of manganese compounds

Method used

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  • Manganese chloride dehydration method and method for promoting (cyclopentadienyl)manganese compound yield

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Embodiment

[0019] Embodiment: referring to accompanying drawing, take the production of methylcyclopentadiene manganese tricarbonyl (MMT) gasoline octane number synergist as an example, commercially available manganese chloride (about about 1% water content) is put into double cone In the cylindrical vacuum dryer 1, the dryer is continuously rotated, and the temperature is raised to 200-250°C. At the same time, it is pumped to a vacuum degree of about -0.09Mpa through the connected vacuum pump 3, and the online moisture detection in the series-connected vacuum pipeline Instrument 2 detects the moisture in the exhaust gas until it is stable at 200ppm or below, keeps the temperature for 3-5 hours, and replaces it with dry gas several times, and removes as much moisture as possible from the dryer to obtain anhydrous water with a moisture content of less than 200ppm. manganese chloride. Then open the discharge valve on the drier, and put it into the carbonylation kettle to carry out the carb...

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Abstract

The invention discloses a dehydrating method to obtain low-water manganese chloride and receiving rate improving method of manganese compound, which comprises the following steps: placing manganese chloride with crystal water in the sealed drier; heating to 150-450 deg.c; extracting into -0.01-0.1Mpa; gasifying the manganese chloride crystal water in the drier; draining along with vacuum; measuring the drained water; putting in the oxonation autoclave through pipe to do oxonation reaction. The invention makes water content of manganese chloride lower than 200ppm, which improves receiving rate of manganese compound by 8-15%.

Description

technical field [0001] The invention relates to a dehydration method capable of obtaining manganese chloride with low water content (for example, water content less than 200ppm) and a method for improving the yield of manganese compounds. Background technique [0002] Manganese chloride is required to have as low a water content as possible in some special chemical production, for example, the water content is less than 200ppm or less. And currently commercially available "anhydrous" manganese chloride has the lowest water content mostly around 0.5-1% (5000-10000ppm). The reason is: manganese chloride has strong hygroscopicity, and after moisture absorption, 4 water (crystal water) manganese chloride is generated, and it is quite difficult to remove the 4th crystal water, so the moisture content of commercial manganese chloride is relatively high. Some special requirements cannot be met. For example, the coordination reaction between sodium cyanocene and manganese chloride ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/06C07F17/00
Inventor 罗敏毅陈亮明王建安罗竑王锋
Owner 宜兴市创新精细化工有限公司
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