Salifying reactor and method for preparing isocyanate

A reactor and salt-forming technology, which is applied in the field of salt-forming reactor and the preparation of isocyanate by using the reactor, to achieve the effects of low hydrolysis chlorine, avoiding incomplete amine reaction, and low color number
CN113181859AActive Publication Date: 2021-07-30WANHUA CHEM GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WANHUA CHEM GRP CO LTD
Publication Date
2021-07-30

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Abstract

The invention discloses a salifying reactor and a method for preparing isocyanate by adopting the same. The reactor comprises a kettle body, a crude salt system, a refined salt system, a disc distributor, a fluid director and a mechanical stirrer; the crude salt system comprises a gas-phase feeding distributor, a liquid-phase feeding distributor and a cylindrical perforated plate, wherein the liquid-phase feeding distributor and the gas-phase feeding distributor are respectively communicated with a gas-phase feeding pipe and a liquid-phase feeding pipe; and the refined salt system comprises a rotary grinding cylinder and a grinding sheet. Through the reactor, the conversion rate of amino salifying can be improved while the salifying efficiency is improved; and the yield and the product quality of isocyanate are effectively improved by reducing the particle size of hydrochloride particles.
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Description

Technical field

[0001] The present invention relates to a formation of a salt reactor and a method of preparing an isocyanate using the reactor, and in particular, a method of synthesizing isocyanate is formed into a salt-fluidized reaction. Background technique

[0002] Isocyanate is the main raw material of polyurethane, polyurethane material is currently the best thermal insulation material in international performance, has good oil-resistance, toughness, wear resistance, aging resistance and adhesion, a large amount of polyurethane material, therefore A large amount of isocyanate is required. In an existing isocyanate synthesis reaction, a carballation of the isocyanate is prepared by reacting an alternating solvent in an inert solvent in an existing isocyanate synthesis reaction. For existing methods, chlorobenzene or o-chlorobenzene is usually used as a solvent, which is widely used because of its good inert and dissolved power, and is very suitable for recovering excess of...

Claims

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