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High-Shear Dissolver for VI Improver Plants

 

Step Action Equipment Involved
1

The tank is fed with base oil; solid polymer blocks are added when oil reaches approx.

 

 Dissolving Tank
2

The mixer creates a vortex, drawing blocks into the rotor-stator to be reduced to small particles.

 

 Bottom Disintegrator
3

Particles are pumped through the secondary mixer and recirculated into the tank until completely dissolved

 

 In-line Mixer
4

Once fully dissolved and homogenized, the units stop, and the product is ready for transfer.

 

 Discharge System

 

Applications in Lubricants

VI improvers are essential polymers used in multigrade lubricants to control viscosity relative to temperature. Utilizing these high-shear mixers directly at a Lube Oil Blending Plant provides:

 

 

High-Shear Dissolver for VI Improver Plants
Overview of Mixing Technology

The Wahal high-shear dissolver offers a dual function of disintegrating and homogenizing Viscosity Index (VI) improvers in a single batch operation. This is achieved through the combined action of a bottom high-shear mixer and an in-line high-shear mixer, both of which utilize a rotor-stator design.

Features and Performance
Disintegration without Shredding: The main mixer is installed at the bottom of the dissolving tank. It creates a vortex that draws solid polymer blocks (up to 400 mm) from the surface directly into the rotor-stator

Intense Mechanical Mixing: Due to the high shearing rate, manual shredding or cutting of polymer blocks is unnecessary, even for hard polymers

Total Homogenization: Small particles produced by the bottom unit are pumped through the in-line mixer for final homogenization to achieve optimal product quality.

Thermal Efficiency: Dissolving is assisted by temperature control.

Operating Principle

The process follows a four-step sequence to ensure solid polymers are fully dissolved into base oils:

Applications in Lubricants
VI improvers are essential polymers used in multigrade lubricants to control viscosity relative to temperature. Utilizing these high-shear mixers directly at a Lube Oil Blending Plant provides:

Cost Savings: Limits transported volume and reduces inventory costs

HSE Compliance: Eliminates dusty and unsafe shredding operations

Flexibility: Motor speeds are adapted to specific product types and volumes

WHAT OUR CLIENTS SAY

Testimonial

“After pilot testing the ZR splash mill and 4 stage inline homogeniser , and achieving very positive results we are highly satisfied with the production models installed by Wahal . Our company is primarily using the units for wet dispersion & grinding and experiencing significant improvements in batch cycle time, production efficiency and overall product quality. I highly recommend their products and their creative problem solving approach.”

Mr. Raman PrasadManager, Symbiotec Pharmalabs Pvt. Ltd.

Give us a call or drop by anytime, we endeavour to answer all enquiries within 24 hours on business days. We will be happy to answer your questions.


Contact:
Mr. Shubham : +(91)-9899387031

Email:
shubham@wahalengineers.com
dilbar@wahalengineers.com
wahalparveen@gmail.com

Head Office
Plot No. G-39, Friends Industries Area, Shahbad, Daulatpur
New Delhi – 110042, Delhi, India

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