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The method for continuous production of 3-octanoylthiopropyltriethoxysilane by tower organic method

A technology of octanoylthiopropyltriethoxysilane and mercaptopropyltriethoxysilane is applied in the field of producing 3-octanoylthiopropyltriethoxysilane to improve compatibility, The effect of reducing the possibility of hydrolysis and simplifying the operation

Active Publication Date: 2021-03-16
江西宏柏新材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problem that solvents and catalysts are required to participate in the reaction in the existing rubber preparation methods, and to provide a method for the continuous production of 3-octanoylthiopropyltriethoxysilane by tower organic method

Method used

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specific Embodiment approach 1

[0017] Embodiment one: the method for the continuous production of 3-octanoylthiopropyltriethoxysilane by tower organic method in the present embodiment is carried out according to the following steps:

[0018] Insert the feed pipe into the raw material barrel, then open the feed valve of the metering tank, pump 715kg of 3-mercaptopropyltrialkoxysilane and 512kg of octanoyl chloride into the metering tank respectively, close the valve after pumping, and use N 2 Evacuate the two metering tanks, turn on the circulation pump for circulation, keep the vacuum degree in the tower reactor at -0.095MPa~-0.1MPa, open the condenser on the top of the tower reactor, and use the metering pump to pump octanoyl chloride into and The flash tank connected to the tower reactor, octanoyl chloride is vaporized in the flash tank, and sent to the tower reactor from the bottom in the form of vapor, the flow rate of octanoyl chloride is controlled at 350-360L / h, when the temperature in the tower excee...

specific Embodiment approach 2

[0019] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the vacuum degree inside the tower reactor is maintained at -0.096MPa~-0.098MPa. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the octanoyl chloride flow rate is controlled at 352-358 L / h. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a method for continuously producing 3-octanoyl thiopropyl triethoxysilane by virtue of a tower type organic method and relates to a process for continuously producing 3-octanoylthiopropyl triethoxysilane. According to the method, the technical problem that the reaction needs to be carried out through a solvent and a catalyst in an existing rubber preparation method is solved. The method comprises the steps of introducing caprylyl chloride in a tower of a tower type reactor into a flash tank connected with the tower type reactor, when the temperature in the tower exceeds90 DEG C, starting a discharging valve of a 3-mercaptopropyl trialkoxysilane measuring tank, and conveying 3-mercaptopropyl trialkoxysilane into the tower type reactor by virtue of a measuring pump,so as to obtain 3-octanoyl thiopropyl triethoxysilane. The method has the beneficial effects that the raw materials can direct react without a solvent and a catalyst, so that the cost is saved, the operation is simplified, and the method is suitable for large-scale industrial production; and the product purity reaches over 96%, the yield reaches over 95%, and the waste gas produced in the reactionprocess can be circularly utilized.

Description

technical field [0001] The invention relates to a process for producing 3-octanoylthiopropyltriethoxysilane. Background technique [0002] In the rubber manufacturing industry, sulfur-containing silane coupling agents are widely used. With the continuous progress of the modern automobile industry, the tire industry has also developed rapidly, especially with the deepening of the concept of "green tires", the demand and production of sulfur-containing silane coupling agents have increased year by year. [0003] In the preparation method disclosed in the publication number WO2005001661, sodium sulfide is used as a sulfur source to synthesize 3-octanoylthiopropyltriethoxysilane with octanoyl chloride and 3-chloropropyltriethoxysilane in an aqueous method. This method will produce a large amount of waste water and waste gas in the production process, and the product is not easy to remove water, is prone to hydrolysis, and has poor storage stability. [0004] The method disclos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/18
CPCC07F7/1892
Inventor 纪冠丞张磊李季
Owner 江西宏柏新材料股份有限公司
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