Phil Chemical: Microreaction technology development bears fruit

Recently, Feili Chemical Engineering (Suichang) Co.
, Ltd.
(hereinafter referred to as Feili Chemical) 1500 tons/year electrolyte additive pilot production line produces qualified products, and 30,000 tons/year electrolyte additive continuous production line will also be completed
before the end of this year.
Moreover, the micro-continuous reaction technology and fully automatic solid-liquid separation technology developed by the company have provided nearly 250 sets of equipment
to more than 100 customers.

"This is the achievement
of our research efforts for many years in micro-continuous reaction technology and automatic solid-liquid separation technology.
" Mao Weiqing, founder and chairman of Feili Chemical, said
.

Committed to R&D to create the ultimate product

Over the years, Feili Chemical has continued to innovate and develop, and the research and development results of continuous flow microchannel reactor and solid-liquid separation filter press have continuously achieved product finalization and batch trial production
.
At the same time, the company continues to increase investment in R&D expenses every year, and R&D expenses reach more than
8 million yuan.

At the beginning of this year, the company signed a contract with a new energy enterprise with a total value of 100 million yuan to build a continuous production line
for electrolyte additives of 30,000 tons/year.

Mao Weiqing introduced that after receiving the task, all employees of the company went all out and cooperated from
top to bottom.
The company's R & D personnel have rich experience in chemical production, and set chemical synthesis, mechanical automation, chemical engineering and other majors, some personnel have been engaged in chemical production and chemical machinery manufacturing for more than 20 years, they have insight into the difficulties and pain points of chemical production, and soon enter the directional research
.

"The construction of lithium battery electrolyte additive production line, R & D personnel to combine theory and actual production, according to the process characteristics of targeted development
.
In view of the problems found in process development, we adjust CNC machine tools, automatic welding, simulation calculation, etc.
of processing equipment at any time, and design and produce equipment
that meets the process needs.
In addition, we also combine the production characteristics to develop the automatic control of the equipment, such as skid-mounted design, to meet the intelligent production requirements to the greatest extent, reduce human interference, etc
.
Mao Weiqing said
.

The technical person in charge of the company introduced that the new energy enterprise initially used a reactor for production, the medium in the kettle is solid-liquid two-phase, the reaction process will produce a large amount of sulfur dioxide, hydrogen chloride, etc.
, the reaction time is more than
36 hours.
The reaction temperature is high, the time is long, and a large amount of tar-like substances are produced, which seriously affects the quality and yield
of the product.
"By studying the properties of the material and its process, we developed a continuous reactor
for its characteristics.
The reactor adopts a unique feeder and mixing structure to ensure uniform solid-liquid mixing after solid feeding, thereby enhancing the heat and mass transfer effect, and the reactor is equipped with a gas discharge device, which can promote the reaction process and improve the reaction conversion rate
.
Mao Weiqing said
.

After unremitting efforts, Feili Chemical has completed the process development, pilot scale-up and trial production of electrolyte additive production line, and produced qualified products
in the electrolyte additive pilot production line of 1500 tons/year.
After testing, the reaction conversion rate of the reactor reached more than 95%, and the overall reaction time was shortened from 36 hours to less than
2 hours.
On this basis, the 30,000 tons/year electrolyte additive continuous production line is also under construction, which will be completed and put into operation
by the end of this year.

Precise control improves intrinsic safety

In the chemical production process, reaction and separation are the most core units, and they are also the links with the highest safety and environmental risks
.
Every time Feili Chemical develops new products, it adheres to the concept of safety first, changes the production mode of chemical enterprises through continuous flow microchannel reaction process and production supporting reactor system, and improves the intrinsic safety level
of customer production.

Mao Weiqing introduced that the development of the electrolyte additive production line fully considers the safety of
production.
He said: "The microchannel reactor used in the production line, in the micron-scale range, its heat and mass transfer rate is 2~3 orders of magnitude higher than the conventional scale, and also has the characteristics
of large specific surface area and small reaction volume, as well as easy control, easy direct amplification and high integration.
" ”

"In addition, the new continuous flow reaction technology adopted this time has the advantages of small online reaction volume, high mass and heat transfer efficiency, accurate parameter control, stable process, safety and efficiency, etc.
, which can enable the 'dangerous process' to operate
in a safe and efficient controllable mode.
" Mao Weiqing added
.

The project adopts new devices such as microchannel and tubular reactor to transform the three-step reaction into a continuous reaction, and completes the continuous operation of post-processing such as layered extraction, distillation and crystallization, realizing continuous production
in the true sense.
The whole process runs under fully closed and fully automatic control, which realizes the safety, stability and controllability
of the process.

When it comes to application cases, Mao Weiqing is like a treasure
.
In the pharmaceutical field, Fili Chemical has realized the continuous production process of APIs for the treatment of fungal infections; In the application of nitrification process, Filly Chemical has achieved the purity of nitrochlorobenzene of 99.
5% and the content of dinitrodinitrogen impurities is less than 0.
1%.
The new fixed-bed reactor developed by Phil Chemical also realizes the continuous reaction
of atmosphere-liquid specific heterogeneous reaction.