Method of forming a porous composite product, in particular with a high specific surface
AssigneeBollore
InventorsJean-François Penneau, François Capitaine, Philippe Le Goff
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Abstract
A process for the preparation of a porous composite product. The process steps are forming a homogeneous mixture having one or more insoluble polymers, one or more soluble or calcinable polymers and one or more fillers, in particular with a high specific surface; extruding the mixture to form an extruded precursor product; removing the soluble or calcinable polymer or polymers from the extruded precursor product, in order to form pores, and recovering the porous composite product.
Claims18
Process for the preparation of a porous composite product, comprising the steps of:
- a) forming a homogeneous mixture having one or more insoluble polymers, one or more soluble or calcinable polymers and at least 20% by weight of one or more fillers exhibiting a BET specific surface greater than 1000 m2/g,
- b) extruding said mixture to form an extruded precursor product,
- c) removing the soluble or calcinable polymer or polymers from the extruded precursor product, in order to form pores,
- d) recovering the porous composite product, the product exhibiting a BET specific surface greater than 10 m2/g.
Process for the preparation of a porous composite product comprising the steps of:
- a) forming a homogeneous mixture having one or more insoluble polymers, one or more soluble or calcinable polymers and one or more fillers,
- b) extruding said mixture to form an extruded precursor product,
- c) removing the soluble or calcinable polymer or polymers from the extruded precursor product, in order to form pores,
- d) recovering the porous composite product, the product exhibiting a BET specific surface greater than 10 m2/g,
- wherein the removal of stage c) is carried out by subjecting the extruded precursor product to a calcination.
Process for the preparation of a porous composite product comprising the steps of:
- a) forming a homogeneous mixture having one or more insoluble polymers, one or more soluble or calcinable polymers and one or more fillers,
- b) extruding said mixture to form an extruded precursor product,
- c) removing the soluble or calcinable polymer or polymers from the extruded precursor product, in order to form pores,
- d) recovering the porous composite product, the product exhibiting a BET specific surface greater than 10 m2/g,
- wherein step b) comprises:
- i) forming granules in a corotating twin screw extruder,
- ii) forming a film in a single screw extruder.
Dependencies are inferred from the claim text.