Device and method for continuous production of propionic acid peroxide

Abstract

The invention provides a device and a method for continuous production of propionic acid peroxide. The device comprises a raw material tank, a feeding pump, conveying pipelines, a plurality of tandem reaction vessels and a vacuum system; a reaction vessel directly connected with a reaction tank through the feeding pump and one conveying pipeline is the first stage reaction vessel; a feed opening and a discharge opening are formed in each reaction vessel; the device is characterized in that the raw material tank and the first stage reaction vessel are at the same height; except for the first stage reaction vessel, the feed opening of each reaction vessel is connected to the discharge opening of the former stage reaction vessel through an overflow pipe of each reaction vessel; a material in the raw material tank is conveyed to all reaction vessels through the feeding pump and all conveying pipelines, so that a certain feeding speed can be maintained, and a certain rotational speed can be maintained when a mechanical stirrer is started. The device can ensure safe and steady continuous production; the production method is simple and the control is convenient.

Description

[0001] technical field [0002] The invention belongs to the technical field of chemical production equipment and production technology, in particular to a continuous production device and production method of peroxypropionic acid. Background technique [0003] Since peroxypropionic acid can exist stably at a certain concentration below 70°C, it has attracted more and more attention in industrial production, and has been gradually used in epoxidation reactions, hydroxylation reactions, synthesis of lactones, and synthesis of phenols. Traditional perpropionic acid is produced intermittently. The Chinese patent "Preparation method of perpropionic acid" (patent number: 91109115.7) and the US patent Process for the preparation of perpropionic acid solutions (US Patent 4088679) both provide a perpropionic acid solution The preparation method of acid does not involve the production device of peroxypropionic acid. [0004] In the Chinese patent "New Peroxypropionic Acid Production...

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Problems solved by technology

[0004] In the Chinese patent "New Peroxypropionic Acid Production Equipment, Safety Protection Method and Application" (Patent No.: 201110425109.6) and the Chinese Patent "New Peroxypropionic Acid Production Equipment" (Patent No.: 201120530355.3), the same process is provided. Oxypropionic acid production equipment mainly includes reaction kettle, rectification tower, tower top condenser, steam buffer tank, steam jet pump and safety protection pressure relief device, but the method provided by this patent is intermittent peroxypropionic acid production method, can not achieve continuous production

[0006] (1) The discharge from the first-stage reactor to the latter-stage reactor is not smooth;

[0007] (2) The gas phase between the reactors is partially connected, which makes it difficult to control the temperature and pressure of each reactor separately, which makes it difficult to regulate production;

[0008] (3) The inlet and outlet of the same reactor are basically on the same plane, which can easily cause the liquid phase material to short-circuit, so that the hydrogen peroxide that cannot be reacted in the future flows into the next-stage reactor;

[0009] (4) Safety measures for uncontrolled decomposition of peroxypropionic acid were not considered

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