The Process of Liquid Liquid Extraction

The Process of Liquid-Liquid Extraction

What is Liquid-Liquid Extraction?

Liquid-Liquid extraction is a more complex process of separating a liquid mixture over the Liquid-Solid process. Another common term for Liquid-Liquid extraction is as solvent extraction process. The process involves taking liquids, mixing them, and being able to separate them when the liquid settles. Often one part is water while the other can be an organic solvent. The process is illustrated below:


The process involves having an immiscible mixture, represented by A+C and B the parts can be transferred and mixed, and separated. It extracts a solute from a two-part solution by being brought together with another non-homogenous solvent where that solute can be dissolved. From this, the liquid mixtures are isolated with the solutes that can be dissolved distribute where necessary.

Solvents Used in Liquid-Liquid Extraction

While in a Liquid-Solid extraction water is the most common solvent used, in Liquid-Liquid extraction Diethyl Ether is most commonly used. Since the process for Liquid-Liquid extraction requires immiscible solvents things like ethanol and acetone should not be used because they mix with water. Therefore, the listed solvents below are recommended for Liquid-Liquid extraction:

  • Hexane
  • Diethyl Ether
  • Dichloromethane
  • Toluene

All are more commonly chosen for the organic solvent used in this extraction process.

Liquid-Liquid Extraction Uses

There are several processes that require Liquid-Liquid extraction and here are some of the most common uses below:

  • Fermentation
  • Pharmaceuticals
  • Fragrances
  • Food Products
  • Agriculture Chemicals

You can refer to our blog about Liquid-Solid extraction to examine that these two types of extraction methods are used in repetitive industries. So, in a way, they go together at times in terms of their common uses and processes within these industries.

Solvent extraction or Liquid-Liquid extraction is a process that relies heavily on the use of proper solvents. If you have more questions or need more information on the solvents for extractions, we have answers contact us here at Ecolink!

The Process of Liquid Solid Extraction

The Process of Liquid-Solid Extraction

What is Liquid-Solid Extraction?

The process of Liquid-Solid Extraction happens quite often in chemical processes. They range from everyday products a person uses to more industrial uses, which will be discussed later. Liquid-Solid extraction is the process by which solvents are merged with solid material and the non-dissolvable parts are extracted and the liquid parts stay.

What Solvents Are Used in the Process of Liquid-Solid Extraction?

While Water is the most commonly used solvent for Liquid-Solid extraction, there are a few other liquids that are associated with the extraction process and are used for different types of materials:

  • Diethyl Ether
  • Methylene Chloride
  • Ethyl Acetate
  • Hexane
  • Toluene

What is Liquid-Solid Extraction Used For?

Since there are many solvents used to derive liquids from solids, there are many different industries and products that put this process into practice. Some of the most regular uses of Liquid-Solid extraction are:

  • Pharmaceuticals
  • Oil from seeds
  • Metal Salts
  • PCBs derived from Fish
  • Coffee Brewing
  • Tea Brewing
  • Beer Brewing

Liquid-Solid Extraction serves multiple purposes in Chemistry and everyday life and work. The ranges of uses go from big industry pharmaceuticals to right on your corner coffee store or favorite beer brewery. Depending upon the type of substance requiring liquid extraction from it, different solvents need to be used for accurate extraction techniques. It is a simple process that is more common than people believe it to be or realize what it is and does.

Here at Ecolink, Inc., we have a specialized team of representatives to help you effectively find the right chemicals and solvents for you. For more information on solvents for extraction purposes contact us here!


Propylene Glycol Versus Ethlyene Glycol

Glycol an organic compound belongs to the alcohol family. One of the simplest members of the class is Ethylene Glycol which is one of the organic compounds being talked about in this blog, along with Propylene Glycol which is another member of this class that isn’t as simple as Ethylene Glycol.

What is Propylene Glycol?

For the simplest terms, Propylene Glycol is a liquid that has no color, no smell, and no taste and belongs in the chemical class of alcohol. Propylene alcohol serves the main purpose of absorbing water. People will commonly mistake Propylene glycol for Ethylene glycol, but the contrast is that Ethylene glycol is toxic. Propylene glycol is an additive product and serves many different purposes in a multitude of industries.

Some of these uses for Propylene Glycol include:

  • Food Industry Coolants
  • Deicing and antifreeze fluids
  • Non-ionic Detergents
  • Plasticizers
  • Hydraulic brake fluids
  • Solvent
  • Extractant
  • Humectant
  • Unsaturated Polyester Resins

What is Ethylene Glycol?

Slightly similar but different, Ethylene glycol is a synthetic liquid that also absorbs water. Ethylene glycol is odorless, colorless, and also in contrast has a sweet taste. As mentioned before, Ethylene glycol is toxic which makes it the biggest difference from Propylene glycol  besides having a taste, unlike the tasteless Propylene glycol. Ethylene glycol serves similar purposes in different industries but lacks some of the other uses and is limited in applications.

Some uses of Ethylene Glycol include:

  • Antifreeze and de-icing solutions
    • Auto
    • Aviation
    • Boating
  • Hydraulic brake fluid
  • Inks (used in)
    • Stamp pads
    • Ballpoint Pens
    • Print Shops


Propylene glycol and Ethylene glycol through their descriptions and definitions have many similarities, but the biggest difference that needs to be discussed is their levels of toxicity and Ethylene glycol being heavily toxic. The ATSDR classifies Ethylene glycol as a CNS depressant, a similar substance would be ethanol, classifying it as a hazardous material. Ethylene glycol if ingested affects kidney function and can affect the acid/base balance in the human body. Propylene glycol is not toxic compared to Ethylene glycol because it’s recognized as safe by the ATSDR for the pharmaceutical and food industries, and rarely results in toxic effects. In circumstances where there was a toxic effect, it was in strange circumstances. Though they both serve important purposes one is safer for human consumption than others.

For more questions about chemicals, you may be handling or coming into contact with contact us here today!

Video Jet Printers

Video Jet Printers Uses And Applications

What are Video Jet Printers?

In the printing world, there are so many emerging technologies ones we’ve used before, and many that are breaking barriers of what we know and can do. Recently, I did some research into VideoJet Printers and learned about who they provide for and what they can do for the printing industry. VideoJet’s industrial printers do a wide variety of regular printing to thermal transfers, and labeling systems. They even have a process where ink that isn’t used can be put back into the printer during the printing process.

Videojet Printers provide many different products. They are an OEM (original equipment manufacturer) and provide printers to lasers, to anything you can think of that prints something onto a product.

Industries Printers are used in are:

  • Food and Beverage
    • Candy
    • Beverages
    • Eggs
    • Fruits & Veggies
    • Meat
  • Pharmaceuticals & Beauty
    • Cosmetics
    • Pharmacy
    • Medical equipment
    • Tobacco
  • Industrial
    • Auto Industry
    • Aerospace
    • Chemicals
    • Construction
    • Electronics

Covering a wide range of industries these printers can cover so many different products and services. While we now know what industries these printers can be used for it’s also important to know what specific products it can be applied to.

Applications of VideoJet Printers:

  • Packaging
  • Lumber
  • Egg Cartons
  • Plastic Parts
  • Glass Bottles
  • Glass Containers
  • Shrink Wrap
  • Film & Foils
  • Aluminum Cans

While there are many more applications to list most are subcategories of the main ones listed above. If you are using printers like these, one of the biggest questions you can ask yourself is what do you clean these products with when you’re done, well that depends on what solvent you use.

Simply put if you use an ethanol based solvent, then you need an ethanol based cleaner to clean it. Whatever you put in you use something of the same family to treat and clean it. According to VideoJet, that is the most effective way to clean their products.

If you or someone you know has a VideoJet Printer that needs cleaner, and you need help matching a cleaner for your product, contact us here or if you already know what you need you can find a list of our cleaning solutions here.

Is USP The Same As Pharmaceutical Grade

Is USP The Same As Pharmaceutical Grade?

If you are looking into different chemicals and solvents for the production of hand sanitizer, or other personal care products, you may be wondering, is USP the same as pharmaceutical grade? USP is the abbreviation for the US Pharmacopeia, who sets forth the various substance protocols and standards that chemicals must adhere to prove their potency and purity, and be classified into the high purity “pharmaceutical grade” class. Since the US Pharmacopeia sets the standard for the pharmaceutical grade chemical calls, to call a chemical like glycerine or alcohol USP means it is in fact pharmaceutical grade. These terms have come to prominence during the COVID-19 pandemic as many manufactures are beginning to produce hand sanitizer that adheres to the FDA formula that calls for USP or Pharmaceutical grade IPA and Glycerine 99.7%.

What are USP/Pharmaceutical grade chemicals used for?

  • Hand Sanitizer – The FDA has included glycerine 99.7% USP as a required ingredient for liquid hand sanitizers, due to its hypoallergenic and nonirritating properties, making this formula safer and more widely useable to more consumers.
  • Personal Care Products – Many personal care products such as acne treatments, mouth wash, toothpaste, lotions, and more contain pharmaceutical-grade solvents and chemicals as the active ingredient. It is very important that these personal care products contain the highest purity solvents to ensure quality and safety for users.
  • Pharmaceuticals – Pharmaceutical grade IPA is widely used in the manufacturing and production of various pharmaceuticals as a solvent ingredient.
  • Cosmetics – Pharmaceutical grade alcohol is also used as a solvent in various cosmetic products like pressed powders.

Is USP the same as pharmaceutical grade, and where can this grade be purchased?

In short, USP is the same as pharmaceutical grade. If you are looking for pharmaceutical grade chemicals and solvents in bulk for the production of hand sanitizer, or other personal care products Ecolink can help. Ecolink is a trusted, environmentally-friendly bulk supplier of high purity chemicals. Our customer care team will work with you to help you find the best products for your needs, at an affordable price. Contact us today to learn more.