Method of handling liquid chemicals

• US 5,435,460 A
• Filed: 04/15/1994
• Issued: 07/25/1995
• Est. Priority Date: 09/11/1992
• Status: Expired due to Term

• Current Assignee: Advanced Technology Materials, Inc. (Entegris Incorporated)
• Original Assignee: Now Technologies Incorporated (Entegris Incorporated)
• Inventors: Osgar, Michael L.
• Primary Examiner(s): Kashnikow, Andres
• Assistant Examiner(s): Bomberg, Kenneth
• Application Number:
  US08/228,081
• Time in Patent Office: 466 Days
• Field of Search: 222/1, 222/83, 222/83.5, 222/88, 222/91, 222/95, 222/105, 222/400.7, 222/464
• US Class Current: 222/1
• CPC Class Codes: B65D 85/84 for corrosive chemicals
• CPC Class Codes: B67D 7/0294 Combined with valves
• CPC Class Codes: B67D 7/76 Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators

Abstract

A container for storage, transport, and dispensing of liquid chemicals includes a fluid container having a port, a dip tube having a fluid passage from an upper-end to a lower end of the dip tube, a dip tube coupling at the upper end of the dip tube for insertion into the port, and a rupturable membrane sealed over a top end of the port. The dip tube coupling has a cavity in its upper end and a fluid passage connecting the cavity with the fluid passage of the dip tube. The dip tube coupling defines a gas passage extending from an interior of the fluid container to the cavity. A rupturable membrane is positioned over a top end of the port to seal the cavity, so that when the rupturable membrane is punctured or removed, gas from the fluid container, which has accumulated in the cavity, is permitted to escape. To remove the liquid chemical, the cap is removed to expose the rupturable membrane. A probe is next inserted through the membrane to allow gas to escape, and into the cavity, whereby the probe, upon insertion into the cavity, causes the gas passage to be blocked. Liquid is dispensed from the fluid container through a fluid passage within the dip tube and through a flow passage within the probe.

Claims

1. A method of handling liquid chemicals, the method comprising:

providing a flexible bag having an interior for holding liquid and having a fitment sealed thereto, the fitment defining a port which communicates with the interior of the flexible bag;

positioning a retainer around the fitment;

placing the flexible bag within an interior of an outer container, by insertion through a mouth of the outer container, the retainer engaging the mouth of the outer container to hold the fitment in position within the mouth of the outer container;

filling the interior of the flexible bag through the port;

inserting a dip tube, having a fluid passage therein, and a dip tube coupling into the port, whereby the dip tube coupling defines a gas passage extending from the interior of the flexible bag to a cavity in an upper end of the dip tube coupling; and

placing a cap over the port of the flexible bag.

2. The method of claim 1 and further comprising:

placing a rupturable membrane over a top end of the port to seal the cavity before placing the cap over the port.

3. The method of claim 2 further comprising:

removing the cap to expose the rupturable membrane;

inserting a probe through the membrane to allow gas to escape, and into the cavity, whereby the probe, upon insertion into the cavity, causes the gas passage to be blocked, the probe having a flow passage therein; and

dispensing liquid from the flexible bag through the fluid passage within the dip tube and through the flow passage within the probe.

4. The method of claim 3 wherein the probe includes an O-ring for sealing between the probe and the cavity.

5. The method of claim 1 further comprising:

supplying fluid under pressure between inner walls of the outer container and the flexible bag to dispense liquid from the flexible bag through the fluid passage within the dip tube and through the flow passage within the probe.

6. A method of handling liquid chemicals, the method comprising:

providing an outer container having a mouth and a flexible bag having an interior for holding liquid and having a fitment sealed thereto, the fitment defining a port which communicates with the interior of the flexible bag;

placing the flexible bag within an interior of the outer container, by insertion through the mouth of the outer container;

mounting the fitment of the flexible bag to the mouth of the outer container to hold the fitment in position within the mouth of the outer container;

filling the interior of the flexible bag through the port; and

inserting a dip tube having a fluid passage therein, and a dip tube coupling into the port, whereby the dip tube coupling defines, a gas passage extending from the interior of the flexible bag to a cavity in an upper end of the dip tube coupling.

7. The method of claim 6 including:

placing a cap over the port of the flexible bag.

8. The method of claim 6 including:

placing a rupturable membrane over a top end of the port to seal the cavity.

9. The method of claim 8 including:

puncturing the rupturable membrane to allow gas to escape.

10. The method of claim 6 including:

placing a rupturable membrane over a top end of the port to seal the cavity; and

placing a cap over the port of the flexible bag.

11. The method of claim 10 including:

removing the cap to expose the rupturable membrane;

inserting a probe through the rupturable membrane to allow gas to escape, and into the cavity, the probe having a flow passage therein; and

dispensing liquid from the flexible bag through the fluid passage within the dip tube and through the flow passage within the probe.

12. The method of claim 11 including:

blocking the gas passage during dispensing liquid from flexible bag to prevent liquid from flowing through the gas passage.

13. The method of claim 11 including:

supplying fluid under pressure between the inner wails of the outer container and the flexible bag to dispense liquid from the flexible bag through the fluid passage within the dip tube and through the flow passage within the probe.

14. A method of handling liquid chemicals, the method comprising:

providing a fluid container having an outer container, an inner container, and a port which communicates with an interior of the inner container;

filling the interior of inner container through the port; and

inserting a dip tube having a fluid passage therein, and a dip tube coupling into the port, whereby the dip tube coupling defines a gas passage communicating between the interior of the inner container and an exterior of the outer container.

15. The method of claim 14 including:

sealing the port of the fluid container.

16. The method of claim 14 including:

placing a cap over the port of the fluid container.

17. The method of claim 14 including:

placing a rupturable membrane over a top end of the port; and

placing a cap over the rupturable membrane to cover the rupturable membrane.

18. The method of claim 14 including:

placing a rupturable membrane over a top end of the port.

19. The method of claim 18 including:

inserting a probe through the membrane to allow gas to escape, the probe having a flow passage therein; and

dispensing liquid from the inner container through the fluid passage within the dip tube and through the flow passage within the probe.

20. The method of claim 19 including:

supplying fluid under pressure between the inner container and the outer container to dispense liquid from the inner container through the fluid passage within the dip tube and through the flow passage within the probe.