As a chemical raw materials supplier, I get asked all the time by small manufacturing clients, lab managers, and even new startup founders I meet at industry mixers—“What actually goes into making the stuff we buy from you?” It’s a fair question. Most people see chemical raw materials as just bulk, uniform products shipped in drums or totes, with no real thought to the messy, precise, often years of process that turns raw natural inputs into something ready for their production lines. I’ve spent the last 12 years working directly with the teams that run our partner manufacturing facilities, walking through every control room, distillation tower, and quality lab, so I thought I’d break down the production processes of three of our most common, in-demand raw materials right now: industrial grade sodium hydroxide (lye), granular urea, and 99.5% pure isopropyl alcohol. No jargon overload, no textbook fluff—just the real, day-to-day work that turns basic materials into the products you rely on. Chemical Raw Materials
First up: industrial sodium hydroxide, or caustic soda, as we call it on the floor. This isn’t the same as the drain cleaner you pick up at the grocery store, though it’s the same chemical formula—NaOH. The industrial version is the backbone of so many industries we supply: paper and pulp processing, soap and detergent manufacturing, water treatment, and even textile bleaching. A lot of new buyers are surprised to learn that most industrial sodium hydroxide doesn’t come from mining or digging up something from the earth; it’s made via the chloralkali process, which is one of the most energy-intensive but also most efficient electrochemical reactions out there. Let me walk you through it step by step, because it’s fascinating to watch.
It starts with two basic, almost comically common inputs: salt (sodium chloride, NaCl) and water. Not table salt with extra iodine, but refined rock salt or brine harvested directly from salt flats. The first step is brine purification, and this is where a lot of the quality happens that sets our product apart. Raw brine has impurities like calcium, magnesium, and sulfate ions—stuff that would gunk up the equipment or lower the purity of the final NaOH. So we pump the brine into large mixing tanks, where we add sodium carbonate and sodium hydroxide. Those chemicals react with the impurities to form solid precipitates, like a fine white sludge. We filter that sludge out with pressure filters, then test the remaining brine for purity with a conductivity meter to make sure it’s above 99.5% NaCl. If it’s even a little off, we send it back for another round of purification—we don’t cut corners here, because bad brine ruins the whole batch.
Next comes the core of the process: electrolysis. We pump the purified brine into what are called electrolytic cells, which are giant, sealed chambers separated by a permeable membrane (usually made of polymer, designed to let sodium ions pass through but not chlorine or hydroxide ions). Each cell has an anode (positive electrode, usually titanium coated with a ruthenium mix) and a cathode (negative electrode, usually nickel). When we run a direct electrical current through the cell, a chemical split happens. At the anode, chloride ions from the brine combine to form chlorine gas—this is a valuable byproduct, by the way, that we sell to other chemical manufacturers to make things like PVC. At the cathode, water molecules get split into hydrogen gas and hydroxide ions. The sodium ions pass through the membrane to mix with the hydroxide ions, forming sodium hydroxide. The leftover brine, which is now depleted of NaCl, is called weak brine and gets recycled back into the purification tanks to be reused—we’re big on circular processes, which cuts down on waste and energy.
Now, the raw sodium hydroxide coming out of the electrolytic cells is only about 32% concentration, right? That’s not strong enough for most industrial uses, so we need to concentrate it. We pump it into a series of steam-heated evaporators, where we boil off excess water until we get to the concentration we need: usually 50% liquid NaOH, or we go further to solid or granular lye for some clients. The final step is quality testing: we take samples from every batch, test for purity, heavy metal content, and pH level, and only when it passes do we load it into stainless steel tanks for shipping. I’ve seen a batch get rejected once because one small section of the evaporator was leaking steam, leading to slightly lower concentration—we tossed the whole batch (about 120,000 liters) instead of risking sending it to a client who needed 50% lye for their soap line. That’s the standard we run by.
Next, granular urea. Urea is big with our agricultural clients, but it’s also used in animal feed, as an additive in plastics, and even in some diesel exhaust fluid. It’s one of the most produced chemicals in the world, and it’s super straightforward in theory, but getting the granular form just right takes precision. Urea starts with two common chemicals: ammonia and carbon dioxide. Ammonia is made from natural gas, via the Haber-Bosch process, and carbon dioxide is usually a byproduct from natural gas processing or fertilizer plants. The core reaction is straightforward: ammonia plus carbon dioxide under high pressure and temperature turns into urea.
First step is the synthesis reaction. We inject liquid ammonia and carbon dioxide into a high-pressure reactor (usually at 150 to 200 atmospheres of pressure and around 180 degrees Celsius—super hot, super high pressure, so these reactors are built like tanks). The two react, first forming ammonium carbamate, then that decomposes into urea and water. The output from the reactor is a mix of urea, unreacted ammonia, water, and leftover CO2. We send that mix to a stripper, where we heat it and lower the pressure to separate the unreacted ammonia and CO2, which we recycle back into the reactor to reuse. That’s another big waste-cutting step—we rarely waste raw materials here.
Now we have a 70% urea solution, which is still too weak and too watery to turn into the hard granular product our agricultural clients want. We pump that into a vacuum evaporator, where we boil off more water to get to a 99.5% pure urea melt. This melt is hot and liquid, and here’s where the granular form is made: we spray the molten urea through a series of small nozzles at the top of a tall cooling tower. As the droplets fall down the tower, they collide with a stream of cool, ambient air (we sometimes use forced airflow to speed it up) and solidify into small, round, sand-like granules. The size of the granules is controlled by adjusting the nozzle size, the speed of the air, and the temperature of the melt—we can make granules from 0.5mm to 4mm, depending on what the client needs. Once they’re solid, we screen them to separate any oversized or undersized granules, toss those back into the melt to reprocess, and package the good ones into bulk bags or silos. Last month we had an order for granular urea for a client that needed 2mm granules specifically for their slow-release fertilizer line—we adjusted the nozzle size and airflow over a weekend, and they’ve been a repeat client ever since.
Third, 99.5% pure isopropyl alcohol (IPA). IPA is used in everything from hand sanitizer (though demand has normalized post-pandemic) to pharmaceutical manufacturing, electronics cleaning, and as a solvent for paints and coatings. It’s one of the products our lab clients rely on, so purity is non-negotiable—even 0.1% of impurities can ruin a batch of lab samples or electronics parts. IPA production is a bit different from the other two because it starts with a petroleum-derived feedstock, usually propylene, or sometimes with fermentation of sugar for lower-grade IPA, but we supply industrial grade, so we use the propylene hydration process, which is more consistent for high purity.
The first step is feedstock preparation. We take propylene gas (refined from crude oil or natural gas processing) and mix it with deionized water in a ratio of about 1:7, plus a small amount of phosphoric acid catalyst. We pump that mix into a high-pressure reactor, again at around 200 degrees Celsius and 100 atmospheres of pressure. The propylene undergoes a hydration reaction, meaning it combines with water to form IPA. The output from the reactor is a crude mix: mostly IPA, plus unreacted propylene, water, and small amounts of byproducts like diisopropyl ether.
Next is purification, which is where we get that 99.5% purity. First, we send the crude mix to a distillation column. Distillation works because different liquids boil at different temperatures. IPA boils at 82.6 degrees Celsius, which is lower than water (100C) and lower than most impurities, so as we heat the mix in the distillation column, the IPA vapor rises to the top, while heavier impurities stay at the bottom. We condense that vapor back into liquid, and send it to a second, more precise distillation column to remove any leftover water or light byproducts. But wait—we don’t stop there, because even after two distillations, there can be trace impurities that affect things like the clarity of the IPA or its suitability for electronics cleaning. So we run the IPA through a molecular sieve dryer, which is a material that traps water molecules, and then through activated carbon filters to remove any organic impurities that would make the IPA discolored or sticky. The final check is a gas chromatography test, where we break down the sample into its individual chemical components and measure the percentage of each. If it’s not exactly 99.5% pure IPA, we send it back for another round of distillation.
I’ll be honest, working in this space, there’s a lot of focus on the end product, but the real story is in the process—how every step is designed to reduce waste, maintain consistency, and deliver exactly what a client needs. We don’t just make chemicals; we adapt. If a client needs a slightly different concentration of NaOH, or a different size of urea granule, or a custom blend of IPA for a specific use case, we can adjust the process to meet that demand. As a chemical raw materials supplier, that’s what matters most: being transparent about how your products are made, and being flexible enough to solve whatever problem your client has.
If you’re looking for reliable, consistent chemical raw materials for your manufacturing, agriculture, lab, or industrial operations, our team can walk you through specs, pricing, and lead times. We pride ourselves on quality, transparency, and on building long-term partnerships instead of just making one-off sales. Reach out to our sales team today to start a conversation about your needs.
Ceramic Tile Frits References:
- Kirk-Othmer Encyclopedia of Chemical Technology, 5th Edition, Vol. 4: Chlorine, Caustic Soda and Bromine, Wiley-Interscience, 2004
- Fertilizer Manual, United Nations Industrial Development Organization (UNIDO) and International Fertilizer Industry Association (IFA), 2007
- Handbook of Industrial Chemistry and Biotechnology, 12th Edition, Springer, 2012, Chapter 14: Alcohols and Ketones
Zibo Glaze Peak Materials Technology Co., Ltd.
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