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LDK Solar Co., Ltd. Message Board

  • bombloze bombloze Nov 28, 2012 2:37 PM Flag

    Odd new LDK patent - 201120564475

    China State Intellectual Property Office issued a patent for LDK for "synthesis fluidized bed".

    The odd part is: there is no description of the patents (whereas all other patents have some semblance of an explanation).

    When I googled the term quoted above, there is a great deal of topics regarding carbon nanotubes. Not sure what to make of this, only that it is a recently published patent applied for in 2011.


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    • They could simply be looking at alternatives for polycrystalline Si production. A decent technical paper on the subject:

      "Producing Poly-Silicon from Silane in a Fluidized Bed Reactor" by B. Erik Ydstie and Juan Du,
      Carnegie Mellon University, USA (2011)

      • 2 Replies to china_s2
      • Thanks for the article.

        While I will agree that it may be related to polysilicon production, I still find it odd that there is no description of the patent. And, why would LDK patent a FBR process for polysilicon if it is already public knowledge. Why not design it, build it, and be done with it?

        The only variable that I can see worthy of a patent is if LDK stumbled upon some way to make polysilicon even more cheaply through their specific FBR design, which likely would be a computerized model and not an actual FBR system because LDK has very little money to spend on such a device.

        As per usual, there is not much transparency from LDK.

        I am still more likely to believe in the FBR process for carbon nanotubes due to their connection with several universities. I can see a university having some funding to build a unique FBR for a highly prized possibility as compared to an already known technology. It would make more sense to model a FBR for carbon nanotubes, build it, see that it works, then patent it.

        For what it is worth......

      • Although I find nothing other than logging and identification, I did find something relating to FBR very interesting.

        It seems that LDK solar has acquired FBR technology and a major company is PO'ed at the accidental IP transfer to which LDK apparently was an innocent party.

        My guess is that now having access, they figured out how to tweak it and generated a new patent to tie up international lawyers for years should it come to that.

        China S2, you on?

    • Here is an abstract from one of those articles turned up by google.

      Carbon nanotubes (CNTs) are pure carbon in nanostructures with unique physico-chemical properties. They have brought significant breakthroughs in different fields such as materials, electronic devices, energy storage, separation, sensors, etc. If the CNTs are ever to fulfill their promise as an engineering material, commercial production will be required. Catalytic chemical vapor deposition (CCVD) technique coupled with a suitable reactor is considered as a scalable and relatively low-cost process enabling to produce high yield CNTs. Recent advances on CCVD of CNTs have shown that fluidized-bed reactors have a great potential for commercial production of this valuable material. However, the dominating process parameters which impact upon the CNT nucleation and growth need to be understood to control product morphology, optimize process productivity and scale up the process. This paper discusses a general overview of the key parameters in the CVD formation of CNT. The focus will be then shifted to the fluidized bed reactors as an alternative for commercial production of CNTs.