Paraformaldehyde (Vacuum Rake Dryer Process)

Introduction

50% formaldehyde solution is pumped into scraper evaporator via flow meter, the falling film evaporator concentrated to 60% flowed into the still kettle. In the kettle it continuously gets heated by the 0.4 MPa steam in the coil and evaporates and dehydrates, when the concentration reaches 75%, put high concentrated formaldehyde into the rake dryer with vacuum. Further get heated and stirred in the rake dryer, get vacuum dehydrated and dry, finally it makes paraformaldehyde. The product gets unloaded from the dryer discharge hole, and then it is put into packer by rubbing board conveyor for package.

Technical Features

The main feature of Raking drying process with scraper is the simple process and little investment. The plant is batch operation, composed with several independent operating unit. When any unit has fault, others will not be affected.

The process is with advantage of vacuum drying as well as stirring drying. The energy saving and less investment of the equipment makes no big loss under normal circumstances.

Chloroacetic acid specification

S/N	Item	Process index	Note
1	PFA content	92~96% w/w	Normally 95%
2	Formic acid	＜0.03%
3	Melting range	120~170℃
4	Ash content	＜100 ppm
5	Appearance	White powder
6	Methanol content	＜1 wt%
7	Free water	＜1 wt%
8	Iron content	＜2 ppm

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Methanol Industry(C1)

Paraformaldehyde (Vacuum Rake Dryer Process)

Introduction

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All Categories

Methanol Industry(C1)

Paraformaldehyde (Vacuum Rake Dryer Process)

Introduction

More Solutions

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