A kind of triethylenediamine crystal and preparation method thereof

A technology for triethylenediamine and crude triethylenediamine, which is applied in the direction of organic chemistry, etc., can solve the problems of difficult particle size and fluidity control, difficult transportation and use process of liquid products, and high temperature requirements, and can reduce the Manual control factors, automatic operation, good liquidity effect
CN108707155BActive Publication Date: 2020-07-24WANHUA CHEM GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WANHUA CHEM GRP CO LTD
Publication Date
2020-07-24
Patent Text Reader

Abstract

The invention discloses a triethylenediamine (TEDA) crystal and a preparation method thereof. The method comprises the following steps: (1) adding crude TEDA to a solvent to obtain a TEDA suspension; (2) heating the suspension obtained in step (1) to a dissolution temperature of 60-70° C. to completely dissolve the solid, and then Slowly lower the temperature. After the seeds are precipitated, grow the crystals at a constant temperature of 2-4°C lower than the dissolution temperature for 0.5-2h; (3) After the constant-temperature crystal growth is completed, continue to cool down to 20-30°C, preferably 23-28°C, and filter , dried to obtain TEDA crystals. The TEDA crystal has a particle size of 800-1000 μm above 85 wt%, a purity of 99.3-99.8 wt%, a water content of less than 2 wt%, and an angle of repose of 36°-40°. The TEDA crystals are large particles, have good fluidity, poor hygroscopicity, are easy to separate and dry, and meet the requirements of transportation and storage.
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Description

technical field

[0001] The invention belongs to the technical field of industrial crystallization, and in particular relates to a triethylenediamine crystal with high purity, large particles, good fluidity and high yield and a preparation method thereof. Background technique

[0002] Triethylenediamine (CAS: 280-57-9), chemical name is 1,4-diazabicyclo[2,2,2]octane, English name is triethylenediamine, abbreviated as TEDA, DABCO, molecular formula: C 6 h 12 N 2 , The relative molecular weight is 112.7.

[0003] TEDA is a tertiary amine compound with a diheterocyclic structure. It is mainly used as a gel catalyst for polyurethane foams. It is widely used in soft, semi-rigid, and rigid polyurethane foams and elastomers. In addition, it can also be used as a ring Oxygen resin curing catalysts, ethylene polymerization catalysts, acrylonitrile polymerization catalysts and ethylene oxide hydrocarbon polymerization catalysts, initiators for the production of pesticides such as he...

Claims

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