Xiangyuan Chemical Develops Continuous o-Chloroaniline Technology

On January 24, I learned from Jiangsu Xiangyuan Chemical Co.
, Ltd.
that the company independently developed the continuous production technology of o-chloroaniline, and built a 10,000-ton/year polyurethane chain extender production line with leading global scale and process technology, with product quality High, green and environmental protection
.

o-Chloroaniline is an important chemical intermediate for medicines, pesticides, fuels, fragrances, etc.
, as well as an important raw material for polyurethane chain extenders
.
Xiangyuan Chemical has innovated the production process for the preparation of o-nitrochlorobenzene catalytic hydrogenation reduction intermediate o-chloroaniline, abandoned the traditional iron powder reduction method, such as the serious pollution of three wastes, and solved the traditional liquid phase of o-nitrochlorobenzene.
The catalytic hydrogenation reduction method has many problems.
The production process has the characteristics of fully closed, solvent-free, continuous, and low pollutant discharge.
The product quality and energy consumption indicators are at the leading domestic level
.

The patented technology independently developed by Xiangyuan Chemical is an integrated process of hydrogen production, hydrogenation and condensation.
It adopts a device for preparing o-chloroaniline by hydrogenation reduction, and uses directly prepared hydrogen and o-nitrochlorobenzene.
Under the action of catalyst, The internal circulation three-phase fluidized bed reactor and nanofiltration technology are used to carry out the catalytic hydrogenation reduction reaction in the pressure-stabilized liquid phase to generate o-chloroaniline intermediates.
The hydrogenation process is a closed circulation system with advanced technology
.

Industry experts said that Xiangyuan Chemical's cyclic continuous production process of hydrogen production, hydrogenation and separation has solved the complex process of the existing liquid-phase catalytic hydrogenation reduction method, the catalyst cannot be recycled and reused, the energy consumption is large, and the equipment requirements There are many deficiencies such as high and dangerous
.
First, the temperature is controlled by the gradient of the three-stage fluidized bed reactor, which makes the reaction quite stable, the separation effect reaches more than 99%, realizes the recovery and reuse of the catalyst, and reduces the production cost and energy consumption
.
Second, the equipment, pipelines and reactors on the production line form a closed circulation system, equipped with DCS remote control to realize continuous production
.
The third is that the exhaust gas of the system is sent to the heating system of the hydrogen production device at a constant speed through the fan for combustion and heating
.
Extremely low pollutant emissions and advanced process technology can greatly reduce environmental risks
.