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Volume 09 Issue 01
  Volume 11 Issue 1 BHS-Sonthofen Inc.  
     Focus | Featured Article | Technology Application | Innovations | Upcoming Events | Blog 
BHS High Temperature, 650 degrees C, Reactor

Focus:  Battery & Precious Metals Materials

Welcome to Year Number 11 of A&SoF. When we started with the first issue, we had no way to know that its popularity would continue to grow. Currently with over 4,500 domestic subscribers and an additional 2,500 international readers, our mission to provide up-to-date technical information remains the same “to help the market to be better at their jobs.” Our ambition is to become an indispensable resource to serve you, our readers. We want to say thank you – we value you and the time you give to reading A&SoF and look forward to engaging with you for many more issues to come.

This issue focuses on battery materials .  We will discuss different examples of mixing, drying and filtration for anode and cathode materials as well as lithium and their precursors.        
As always, thanks again for your feedback and ideas; if you missed any issues, please click on the following link:  A&SoF to view them.  

Barry A. Perlmutter

Featured Article:  How Particle Fines are Generated and How They Can be Removed:


Process engineers struggle to clarify process liquids. But there are ways to automate the clarification processes to improve filtration and minimize operator exposure. The cake solids structure and the nature of the process will determine which types of pressure-filtration, automated clarification technologies are best for you. 
Before we discuss removal of particle fines, let’s discuss how they are generated.  Tom Blackwood, in his Chemical Processing article, Fend Off Fine Particle Frustrations,, talks about two main areas for fines generation.  First, the problem can start in the particle formation step (crystallization, reaction or extraction). Excess supersaturation or the lack of nucleation control can allow fine particles to persist through the process.   

Next, upstream processing can lead to particle fines through attrition.  Attrition can occur in centrifugation, drying, conveying and storage. Tom indicates that he has even seen attrition in liquid/liquid separation processes where crystals have formed due to the immiscibility of the chemical in a solvent. Centrifuges are a common source of attrition due to their filtration and discharge mechanism via the solids hitting the cloth or solid surface due to a poorly designed inlet. 
Engineers have choices to automate the removal process.  Each type has its place and with testing and evaluations, engineers can make the correct choice.  I have written on this topic before,, so check out the information for advice. 

Read the full article…

BHS Technology Application:

Real World Examples of Influences of Particles and Cake Formation on Solid-Liquid Separation Technology Operation

Three different case histories are presented illustrating different scenarios of the impact of particles, particle size distribution (PSD) and cake formation on the separation technology operations.  The first is a specialty chemical application for a continuous rotary pressure filter where the particles changed from lab scale to production scale.  The second case is a clarification application where the system was running successfully for over one-year but inexplicitly, the performance changed drastically and the filter media began plugging very quickly during the cycle.  The final application looks at lab testing and pilot scale testing where the cake formation changed resulting is a unique operating technique. 

Sherlock Holmes and Dr. John Watson are fictional characters of Sir Arthur Conan Doyle.  Process engineers who live in the real-world can learn many things from the two of them for solving process filtration problems.  One example that Holmes proves time and again is there is no benefit to “jumping to conclusions,”  With careful analysis and taking a creative and "non-conventional approach" by looking at what is behind the process data and the operating parameters, the optimum solution will be realized.   

Read more…


Battery and Precious Metals Materials

BHS has many applications in the battery and precious metals materials market space.  We have written in the past about the BHS candle filters for clarification of lithium and nickel brines as well as gold recovery.  For more information on these topics, please visit our websites as follows: 

AVA, a member of the BHS group of process companies, provides reactor-mixer-dryer technologies for producing anode and cathode pastes and pyrolysis reactions at high processing temperatures, up to 650 degrees C, and drying of single lithium components as well as their precursors, to obtain the required dryness or chemical reactions.  The AVA internal agitator designs (see photo) ensure turbulent action while maintaining uniform temperature and final product homogeneity.  For more information on this topic, please see our technical bulletin at: 



Creativity: Lessons Learned from Octopuses

So, here we go again…intertwining two seemingly unrelated topics — creativity and eight-limbed ocean dwellers — in one interesting blog. 
Over the years, as my readers know, I’ve enjoyed discussing fresh sources of innovation. Today, it’s the octopus.  
First some technical details: Octopuses have eight arms, round bodies and bulging bilateral eyes. The 300 species of octopuses live in all the world’s oceans, but prefer warmer, tropical waters. They typically only live between 1 and 2 years, but during that time they like to play.  
That leads us to the good stuff: These creative, intelligent creatures can problem solve and are masterful mimics. Read the full blog to learn more. 


Read the blog

Upcoming Events:


a.       Specialty & Custom Chemicals America:  Fort Worth, Texas, 10-13 February 2020,; BHS will be exhibiting. 

b.      AICHE Spring Meeting:  Houston, Texas, 29 March – 2 April 2020,; BHS will be presenting; contact us to schedule a meeting.

c.       The 13th World Filtration Conference:  San Diego, California, 20 – 24 April 2020,; BHS will be presenting; contact us to schedule a meeting. 

d.      North America Mixing Forum:  Niagara, Canada, 21 – 26 June 2020,; BHS will be attending and discussing the AVA batch and continuous “turbulent & gentle” mixing technologies; contact us to  schedule a meeting.   

e.      Powder & Bulk Solids Show,, Chicago, 28 – 30 April 2020.  BHS will be discussing the latest in drying technologies; please contact us to schedule a meeting.

f.      The Battery Show, Novi, Michigan, 15 – 17 September 2020.  BHS will be discussing high temperature technologies for producing electrode pastes, reactions and drying to bone-dry powder;  please contact us to schedule a meeting.

g.      Process Expo  Chicago, 8 - 11 October 2020.  BHS will be discussing food and spice technologies including spice sterilizations; please contact us to schedule a meeting.

h.       Montreal 2020 Advanced Design & Manufacturing / Powder Show,, Montreal Canada, 7 – 8 October 2020. BHS will be discussing integrated “continuum-processing” technologies from reaction through solid-liquid filtration to bone-dry powder; please contact us to schedule a meeting.

Copyright © 2020 BHS-Sonthofen, Inc., All rights reserved.
BHS-Sonthofen, Inc.
14300 South Lakes Drive
Charlotte, NC 28273-8794
Phone:  704-845-1190

BHS specializes in thin-cake filtration, washing, and drying technologies for pressure or vacuum, batch or continuous operation for high solids and clarification applications.

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