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Product FAQs

FAQs about the Zaiput Separator (SEP)

  1. What can the Zaiput SEP be used for?
    The Zaiput SEP separates any process fluid containing more than 2 immiscible phases. This includes oil/water, aqueous/organic, organic/organic and more. Zaiput SEP can be inserted into any continuous process for inline or downstream separation.
  2. What is pressure rating of the Zaiput SEP?
    Thanks to its special design with a metal shell, the Zaiput SEP can be operated at a high pressure, up to 300 psi/2 MPa. However, it is important to ensure that the pressures of the two outlets are not considerably different. Consult our technical support team for special use at high pressure.
  3. Two phases have very similar densities. Can the Zaiput SEP separate them?
    The separation inside the Zaiput SEP is an interfacial phenomena, not gravity-based. Therefore, it can be used with any fluid mixture, regardless of their density difference.
  4. Why is the pressure control important for successful membrane operation?
    Successful membrane separation requires an optimal pressure difference across the two sides of the membrane, i.e. retained and permeate sides. The Zaiput SEP incorporates an on-board pressure controller such that users no longer need to keep regulating the pressures of the two sides of the membrane. Click here to learn more about how it works.
  5. What makes the Zaiput SEP unique among conventional extractors?
    The Zaiput SEP provides instantaneous complete phase separation in flow. It requires neither a coalescing plate nor a settling tank. Its unique design eliminates the need for electronic apparatus for agitating parts or online process control. Additionally, it is very easy-to-use, inexpensive, and perfectly designed for a wide range of chemical environments (e.g., organic solvents, acidic solutions, high pressure).
  6. Can the Zaiput SEP handle acidic/basic solutions?
    All the wetted parts inside the Zaiput SEP are highly chemical-compatible. The metal shell does not contact the fluid. The Zaiput SEP can handle most of organic solvents as well as corrosive solutions. Contact our technical support team for a chemical compatibility chart.
  7. Does the Zaiput SEP perform differently if I heat or cool it?
    Temperature affects interfacial phenomena. Heating tends to decrease the interfacial tension of liquid mixtures. At very high temperatures, the liquid mixture is close to the miscibility region and may be difficult to separate. Click here to consult our technical support team for special use with extreme temperatures.
  8. What throughput can the Zaiput SEP accommodate?
    Currently, we provide Zaiput SEP devices in two versions, SEP10 and SEP200. The two versions cover flows ranging from 0 to 200 mL/min. We will be launching SEP3000 for operation with flow rates up to 3 L/min in the near future. Click here to contact our sales team for product updates.
  9. Is the Zaiput SEP the same thing as a cross-flow filtration unit?
    The Zaiput SEP separates immiscible fluids based on their wettability. This is different from filtration which uses a size-exclusion technique. Filtration generally removes solid from one liquid phase (either a pure liquid or a miscible liquid mixture).
  10. What are the recommended chemical processes to use with the Zaiput SEP?
    The Zaiput SEP can be used for any type of chemical process, in either the laboratory or in an industrial setting. It is suitable for high-value chemicals thanks to its very small dead volume and high efficiency. Below is a glimpse of its potential applications:

    • Inline workup for synthesis (organic/inorganic)
    • Separation of biphasic mixtures
    • Homogeneous catalyst recovery
    • Liquid-liquid extraction

          o Recovery of pharmaceuticals or fine chemical compounds
          o Separation of alcohols from organic solvents
          o Removal of excess starting materials

  11. How often should I change a membrane after use with chemicals?
    The membrane used in the Zaiput SEP is highly compatible with chemicals so it can function for weeks. However, depending on how clean the separated fluid is, the membrane may need to be replaced more frequently. This is especially true if the fluid contains a significant amount of solid particles/precipitates.

FAQs about the Zaiput back pressure regulator (BPR)

  1. Can the Zaiput back pressure regulator (BPR) handle multiphasic fluids?
    The Zaiput BPR works well with multiphasic fluids such as liquid/liquid and gas/liquid. It is also capable of handling small amounts of solid particles with diameters smaller than 150-200 μl.
  2. How precise is the Zaiput BPR?
    A set point of the Zaiput BPR is adjustable by compressed air/gas. The Zaiput BPR is characterized to maintain a stable pressure with negligible variation (± 5%).
  3. How do I connect a Zaiput BPR into my process?
    The inlet and outlet of the Zaiput BPR are made with a female ¼-28 flat-bottom port. It is recommended to use a male ¼-28 flat-bottom fitting to connect your streamlines to the BPR.
  4. How often do I have to reset the Zaiput BPR?
    The Zaiput BPR is designed to be leak-proof. It has been characterized to be able to maintain a stable pressure for at least 10 days.
  5. What are the differences between a back pressure regulator and a pressure regulator?
    A back pressure regulator is used to regulate inlet pressure, so an upstream fluid will be pressurized to the set point. On the other hand, a pressure regulator regulates outlet pressure, so a downstream fluid will be pressurized to the set point.
  6. What makes the Zaiput BPR unique?
    Unlike many other products on the market, the Zaiput BPR does not come with a factory-preset pressure. Instead, users are allowed to precisely set Zaiput BPR to any pressure within a recommended operating range (1 – 300 psi). The Zaiput BPR is also easy-to-use and chemically compatible.
  7. Is the Zaiput BPR acid-resistant?
    All of the wetted parts inside the Zaiput BPR are made of highly chemical-compatible materials. The metal shell will not be in contact with the fluid. They can handle most of organic solvents as well as acidic solutions. Contact our technical support team for questions about chemical compatibility.
  8. What are the minimum and maximum flow rates that can be operated by the Zaiput BPR?
    The recommended operating flow rate is between 0 and 20 mL/min.
  9. Can the Zaiput BPR be heated for some solid handling applications?
    The internal parts of the Zaiput BPR are made of polymers. Therefore, its recommended operating temperature is below 140 ˚C. For any application at higher temperatures, consult our service team for a customized solution.



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