Benzoic acid purification method and purification equipment

The invention relates to a benzoic acid purification method and purification equipment for realizing the purification method. A benzoic acid solution undergoes crystallization and wall hanging in a 110-120DEG C tube nest, and crystals on the inner wall of the tube nest are dissolved at 130-140DEG C...

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Bibliographic Details
Main Author ZHAO HANSONG
Format Patent
LanguageChinese
English
Published 22.01.2019
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:The invention relates to a benzoic acid purification method and purification equipment for realizing the purification method. A benzoic acid solution undergoes crystallization and wall hanging in a 110-120DEG C tube nest, and crystals on the inner wall of the tube nest are dissolved at 130-140DEG C and purified. The discharge port of a toluene oxidation liquid storage tank is connected to the feedinlet of a crystal tube nest heat exchanger, the discharge port of the crystal tube nest heat exchanger is connected to a semi-finished product tank, a finished product tank and the toluene oxidationliquid tank respectively, the semi-finished product tank is connected to the feed inlet of the crystal tube nest heat exchanger through a circulating pump, and the inside of the crystal tube nest heat exchanger shell is heated or cooled by heat conducting oil. The equipment provided by the invention has a simple structure, can realize purification of benzoic acid, also the equipment is energy saving and is low in producti
Bibliography:Application Number: CN201710576360