1. A process for preparing a VSB-5 molecular sieve by crystallizing a nickel compound and a phosphorous compound with a base, wherein said base is an inorganic base or monoamine and said crystallizing is performed at a temperature ranging from 50 to 350\xb0 C. and pH of 7.0 to 12.0.
2. The process according to claim 1, wherein said inorganic base is selected from the group consisting of ammonia, aqueous ammonia, sodium hydroxide, potassium hydroxide, magnesium hydroxide and calcium hydroxide.
3. The process according to claim 1, wherein said monoamine is selected from the group consisting of triethyl amine, tri-n-propyl amine, diisopropyl amine, triethanol amine, morpholine and cyclohexyl amine.
4. The process according to claim 1, wherein said base is employed in the mole ratio of 1.0-10.0 to 1 mole of said nickel compound.
5. The process according to claim 1, wherein said phosphorous compound is employed in the mole ratio of 0.3-3.0 to 1 mole of said nickel compound.
6. The process according to claim 1, wherein said heating is carried out using a microwave or electric heater.
7. The process according to claim 1, wherein, during said crystallizing, said reactants are agitated at a rate of 100-1000 rpm.
8. The process according to claim 1, wherein a crystallized product from said process using said inorganic base is not subjected to heat treatment.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A seam for ductwork, said seam having a male end portion integrally formed with said ductwork, said seam comprising:
a female end portion integrally formed with said ductwork;
wherein said female end portion includes a first fold and a second fold, said first and second folds defining thereby a female groove for accommodating said male end portion therein;
wherein a distal end of said second fold is bent away from said female groove prior to said male end portion being inserted into said female groove; and
wherein said female groove lies adjacent an outer surface of said ductwork.
2. The seam for ductwork according to claim 1, wherein:
said first fold extends from an inwardly formed hemmed ridge, said inwardly formed hemmed ridge being substantially perpendicular to said duct wall.
3. The seam for ductwork according to claim 1, wherein:
said first fold and said second fold define a sealing angle of approximately 5 to 45 degrees therebetween.
4. The seam for ductwork according to claim 1, wherein:
said first fold and said second fold define a sealing angle of approximately 20 degrees therebetween.
5. A seam for ductwork having a male end portion integrally formed at a distal end of a duct wall, said seam comprising:
a female end portion integrally formed at another distal end of said duct wall; and
wherein said female end portion includes a first fold which is bent to extend in a first direction substantially parallel to said duct wall, a second fold which is bent at an open angle and extends in a second direction to define a female groove for accommodating said male end portion therein, and a sealing fold integrally formed at a distal end of said second fold, said sealing fold being bent at a sealing angle to said second fold prior to said male portion being inserted into said female groove.
6. The seam for ductwork according to claim 5, wherein:
said second direction is substantially opposite to said first direction.
7. The seam for ductwork according to claim 5, wherein:
said open angle is between 10 to 30 degrees.
8. The seam for ductwork according to claim 5, wherein:
said open angle is approximately 20 degrees.
9. The seam for ductwork according to claim 5, wherein:
said sealing fold is bent towards said duct wall.
10. The seam for ductwork according to claim 5, wherein:
said sealing angle is between 45 to 60 degrees.
11. A seam for ductwork having a male end portion integrally formed at a distal end of a duct wall, said seam comprising:
a female end portion integrally formed at another distal end of said duct wall; and
wherein said female end portion includes a first fold bent to extend inwardly and substantially perpendicular to said duct wall, a second fold bent to extend in a direction substantially parallel to said duct wall, a third fold bent back upon said second fold, and a fourth fold bent at an open angle from said third fold and defining thereby a female groove for accommodating said male portion therein.
12. The seam for ductwork according to claim 11, further comprising:
a distal end of said fourth fold bent transverse to said female groove prior to said male portion being inserted into said female groove.
13. The seam for ductwork according to claim 12, wherein:
said open angle is between 10 to 60 degrees.