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Apparatus for carrying out membrane separation processes
| Details |
Inventors: Skaletz, Detlef;
Assignee: Hoechst Aktiengesellschaft (Frankfurt am Main, DE)
Primary Examiner: Sever; Frank
Assistant Examiner:
Attorney, Agent or Firm: Foley & Lardner, Schwartz, Jeffery, Schwaab, Mack, Blumenthal & Evans
An apparatus for carrying out membrane separation processes is described. It comprises a housing, at least one spirally wound-up membrane pocket arranged within the housing and containing at least one drainage layer and semipermeable membranes applied to both sides thereof, a spacer between the individual wound plies of the membrane pocket, a centrally arranged collection line, a first end-face opening as an inlet for the material to be separated, a second end-face opening as an outlet for the concentrate and a discharge line for the permeate which has passed into the collection line. The permeate passage from the membrane pocket into the collection line is kept sealed from the space filled with the material to be separated by means of spring-elastic elements, and the semipermeable membranes are mutually joined by energy-bonded seams in the membrane pocket regions adjacent to the side edges. According to the invention no adhesive is required for the apparatus. |
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DETAILED DESCRIPTION It is therefore an object of the present invention to provide an improved membrane separation apparatus in which undesired contamination of the highly pure permeate with material that is to be separated is effectively prevented.
It is a further object of the invention to provide a membrane separation apparatus in which contamination is prevented even if the separation process is to be carried out at elevated temperatures, in particular from about 45 to 100.
degree.
C.
, or in the presence of organic solvents.
A further object of the invention resides in the provision of a membrane separation apparatus which also permits cleaning operations at high temperatures (above 100.
degree.
C.
) and/or with the aid of organic solvents.
Still another object of the invention is to provide a membrane separation apparatus in which essentially all of the membrane area is available for the permeation process and is utilized.
It is a further object of the invention to provide an apparatus that is also suitable for separation processes in connection with materials that are subject to strict purity requirements such as, for example, foodstuffs.
In accomplishing the foregoing objects, there has been provided according to the present invention an apparatus for carrying out a membrane separation process, which comprises: (a) a centrally arranged collection line having at least one aperture therein; (b) at least one spirally wound-up membrane pocket arranged around the collection line, the membrane pocket containing at least one drainage layer and semipermeable membranes applied to both sides thereof, wherein the semipermeable membranes are mutually joined by energy-bonded (welded) seams at their edges to form the pocket; (c) a spacer between individual windings of the membrane pocket, defining a space for receiving material to be separated; (d) means defining a permeate passage from the drainage layer through the aperture into the collection line; and (e) means for spring-elastically sealing the permeate passage from the space for receiving the material to be separated
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Cooking 
