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Ethyl maltol chlorination continuous production method and device

A technology of ethyl maltol and production method, applied in chemical instruments and methods, organic chemistry, preparation of halogenated hydrocarbons, etc.

Active Publication Date: 2012-03-28
ANHUI JINHE IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the prior art that the conversion rate fluctuates greatly, and the by-product methyl chloride in intermittent production cannot be recovered and causes pollution , providing a continuous production method and device for the chlorination of ethyl maltol

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  • Ethyl maltol chlorination continuous production method and device
  • Ethyl maltol chlorination continuous production method and device

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Embodiment Construction

[0019] A kind of ethyl maltol chlorination continuous production method provided by the invention comprises the following steps:

[0020] a. Continuously feed the methanol solution recovered by hydrolysis into the chlorination reaction kettle at a rate of 100L / h. The chlorination reaction kettle turns on the external circulation refrigeration. Furfuryl alcohol is continuously added dropwise into the chlorination reaction kettle, and chlorine gas is continuously introduced at a rate of 30kg / h at the same time. The heat of reaction is exchanged by the circulating pump through the external cooling heat exchanger. The position rises to the automatic overflow port, and automatically overflows to the hydrolysis reactor;

[0021] b. After the reactant enters the hydrolysis kettle, steam it to 90°C. At this time, the by-products in the chlorination reaction, methyl chloride and methanol, are steamed out, and the crude ethyl maltol is discharged from the hydrolysis kettle at a speed of...

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Abstract

The invention relates to an ethyl maltol chlorination continuous production method and a device. The method comprises the following steps: a) a recycled methanol solution is continuously driven into a chlorination reactor, furfuryl alcohol is continuously and dropwise added into the chlorination reactor when the temperature of the methanol solution is cooled below -10 DEG C, further, chlorine is led in the chlorination reactor for carrying out reaction, and the liquid level in the chlorination reactor rises to an overflow port and automatically overflows to a hydrolyzing reactor; and b) aftera reactant enters the hydrolyzing reactor, steam is led to steam so as to steam out byproducts, i.e. methyl chloride and methanol in a chlorination reaction, and a crude product of ethyl maltol is discharged from the bottom of the hydrolyzing reactor, after methyl chloride gas and the methanol are condensed by a condenser, the methyl chloride gas is recovered as finished-product methyl chloride, methanol solution is recovered to a methanol storage tank, and then, the methanol solution is fed into a refrigerating kettle and then is returned to the chlorination reactor for recycling after beingcooled. The invention has the advantages that: the method and the device provided by the invention can continuously produce, so that the productivity of a single set of devices is improved; and due to the continuous production and the recovery of the methyl chloride, the influence on the environment is eliminated, and further, an added value is generated.

Description

Technical field: [0001] The invention relates to a continuous production method and device for ethyl maltol chlorination. Background technique: [0002] The traditional operation method of ethyl maltol chlorination reaction is to pump a certain amount of methanol solution into the chlorination kettle, and then pass α-furan propanol and chlorine gas into the chlorination kettle at a ratio of 2:1 for reaction. The reaction operation The control is all manual operation, affected by human factors, the conversion rate fluctuates greatly, and the conversion rate of the workshop section is only about 60%. And because of intermittent production, the by-product of the reaction cannot be recovered, and the methyl chloride is vented and discharged, causing certain pollution to the environment. Invention content: [0003] The purpose of the present invention is to solve the problems in the prior art that the conversion rate fluctuates greatly, and the by-product methyl chloride in i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D309/40C07C19/03C07C17/00
Inventor 王丛春程光锦
Owner ANHUI JINHE IND CO LTD
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