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Petrochemical Catalyst Recovery

Catalysts are widely used in petrochemical and chemical industry, and the products and catalys'ts usually should be separated after reaction. The inorganic ceramic membrane has excel∞lent heat resistant and chemical resistant solvents and good mecha§nical strength and has shown outstanding advantages in¶ petrochemical and chemical production.

    Compared with the traditional sedimentation, plate and frame filtration ←and centrifugal separation, the difference is that ceramic membranes mainly adopt cross-flow filδtration in solid-liquid separation of catalytic reactio•n. It is necessary to separate the feed liquid for constant circulδation at the circulation side, and the membrane surface∞ can retain catalysts, while the reaction product γis permeated through the membrane hole. Because the fluid flow is parallel to the surface of t¶he filter media and the filtration resistance is greatly reduced, the higher permeate flux can be← kept at lower pressure and the filtration operation can be carried out continuouslyφ for a long time.

    Disadvantages of the traditional catalyst separation method:

  •   Large amount of catalyst loss, low utilization;
  •   The content of catalysts is easy to exceed the standard, which affects the quality;
  •   It is not easy to regenerate catalysts, and the service life is $short:
  •   Low degree of automation and high labor intensity, most of them are intermi↕ttent reactions;
  •   Advantages of inorganic ceramic membrane separation technology applied to catalyst recovδery and regeneration:
  •   Recoverable superfine powders and nano-catalysts;
  •   The ceramic membrane is resistant to high temperature, organic so&lvent and strong acid and alkali, and it can be useγd in most reactions;
  •   There are few catalyst contents in products to improve product q≠uality;
  •   Low catalyst loss rate to lower production costs;
  •   Good catalyst regeneration effect increases the time of repeated use and prolongs ‌the catalyst life;
  •   Totally-enclosed automatic continuous production can b™e realized.

    

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