WO2001064343A1

WO2001064343A1 - Safety separating funnel

Info

Publication number: WO2001064343A1
Application number: PCT/CH2001/000120
Authority: WO
Inventors: Robert Trefzer
Original assignee: Robert Trefzer
Priority date: 2000-02-28
Filing date: 2001-02-23
Publication date: 2001-09-07
Also published as: CH694633A5

Abstract

The invention relates to a safety separating funnel, comprising a combination of a separating funnel vessel (1) and a separating funnel insert (3), by means of a connecting element (5). The connecting tube (8) and subsequently the narrow tube (9), with the ground glass tap (10) and outlet tube (11) are coaxially fused onto the separating funnel insert (3), above the internal connecting element (7), for the separation of the liquid phases. The safety ventilation tube (13) is fused laterally, inside the connecting tube (8), above the internal connecting element (7), bent downwards through a right angle and extends coaxially with the external tube (14) and the spherical extension (15), beneath the internal connecting element (7) and terminates with the outlet tip (17), on the far end-tube (16), just above the half volume level (18) of the separating funnel vessel. The safety tube (19) is coaxially fused above to the external tube (14) and the safety ventilation tube (13) and terminates with a fused end after the lateral ventilation opening (20), in the lower part of the spherical lower safety chamber (21). The above connects the upper safety chamber (22), between the external tube (14) and the safety tube (19).

Description

SAFETY - separating funnel

The invention relates to a separating funnel, hereinafter referred to as a SAFETY separating funnel, according to independent claim 1

The mode of operation of the separating funnels used in laboratory technology is based on the physical principle of the different densities of liquids, which are not mutually soluble or are only minimally soluble. This allows the simplest way of separating liquid mixtures, for example from extractions

The separating funnels commonly used in laboratory technology so far consist of device glass or quartz glass.The simplest embodiment consists of a pear-shaped or cylindrical vessel with a tapered socket and plug, as well as a diametrically arranged drain pipe with a friction valve.An improved embodiment is the Erlenmeyer separator, which consists of a conical vessel , the well-known Erlenmeyer, with a Kegelschhff sleeve and an insert with a tapered cut core with a coaxial ventilation pipe. This is melted laterally on the inside above the cut, bent downwards at a right angle and ends just below the level of half the volume of the Erlenmeyer at the top The drain pipe with a friction valve is arranged coaxially to separate the layers of liquid

Since the conventional separating funnel described above, when shaking or extracting a watery solution with a solvent, causes an increase in pressure due to the solvent vapor, liquid can spurt out by printing on the plug or if the friction valve is opened too quickly. These often aggressive and or toxic extraction fluids can cause accidents at work

This is not possible with the Erlenmeyer separators with an integrated ventilation pipe. On the other hand, after mixing with rubble or usual stirring with a magnetic stirrer, when tipping over by 180 ° and possibly swiveling to separate the liquid layer via a tap, extraction liquid can flow out through the ventilation pipe Occupational safety and hygiene are impaired

The object of the invention is to eliminate these disadvantages. This is achieved with the SECURITY SECURITY separators Fig. 1 and 2, which meet the necessary security requirements and have been designed to be compact and user-friendly. The outstanding advantage of the SECURITY separation funnel over the existing separation funnels is that significant improvement in work safety and work hygiene This high safety effect is achieved with a coaxial construction of the separating funnel insert, with a safety ventilation pipe combined with a Scheidtπchter vessel, for example round-bottom flasks with a flat bottom, hereinafter referred to as standing flasks. As a connecting element, for example, tapered blades can be melted on Melted on the side of the section, bent downwards at right angles and coaxially extended with an enlarged tube, hereinafter referred to as the outer tube, followed by a spherical or cylindrical extension, hereinafter referred to as the lower safety space, below the conical section and ends at the bottom with the drip tips of a tube, in Called the following tailpipe, just above the level of half the piston volume. The inner pipe, hereinafter referred to as the safety pipe, is coaxially fused at the top with the outer pipe and the safety ventilation pipe and ends in the lower part of the lower safety room t connected to the top, the upper safety chamber, between the outer pipe and the safety pipe On the safety pipe, which is melted down, there is a drainage ventilation opening directly above the fusion. Above the conical grinding core, is at its connecting pipe and subsequent In the narrower pipe, a friction valve with a drain pipe is melted to separate the layers of liquid

This SAFETY construction, for example in the event of careless tipping over by 180 ° and possibly swiveling the SAFETY separator before separating the extraction liquids, often retards aggressive and or toxic liquid spouts in the upper and lower safety room and cannot leave the safety Flowing out the ventilation pipe With simple jerk-tilting, this liquid can be combined with the main amount without loss

The compact and handy SAFETY separating funnels are very useful and efficient laboratory devices thanks to their easy to install and high operational and work safety

The novel constructive solution consists in the SAFETY separating funnel according to the invention of independent claim 1. Preferred embodiments result from the dependent claims

Two exemplary embodiments of the SECURITY separating funnel according to the invention are explained in more detail below with reference to the drawings. FIGS. 1 and 2 each show a partial axial section through the two exemplary embodiments of the SECURITY separating funnel in the schematic representation customary for such devices

The SAFETY separating funnels shown in FIGS. 1 and 2 are combinations of a separating funnel vessel (1), for example a standing flask (2) and a separating funnel insert (3 / FIG. 1) or (4 / FIG. 2), for example, as a connecting element (5) Be conical sections (6 and 7) melted coaxially On the separating funnel insert (3) there is a friction valve (10) on the connecting tube (8) of the conical section core (7), which is extended upwards, and the then narrower pipe (9) melted down drain pipe (11), to separate the extraction liquids (12) The safety ventilation pipe (13) is melted on the side above the tapered core (7) in the connecting pipe (8), bent downwards at right angles and extended coaxially with the outside Pipe (14), the spherical extension (15) below the tapered core (7) and ends with the diametrically tapered wide end pipe (16) with the drip tips (17), just above the level of half the piston volume (18) Das The safety pipe (19) is coaxially fused at the top with the outer pipe (14) and the safety ventilation pipe (13) and ends, after the flush ventilation opening (20), fused in a pointed shape in the lower part of the spherical lower safety room (21) The upper security space (22) between the outer tube (14) and the security tube (19) is connected to the top.

In the embodiment variant Fig 2, the separating funnel insert (4) has the safety pipe (19) ending in the lower part of the cylindrical lower safety chamber (24), after the lateral flush ventilation opening (20), with an overlapping convex or pointed safety -Melt (25) or (26) melted down Furthermore, the narrow end pipe (27) with the drip tips (17) melted below the cylindrical lower safety room (24) is dimensioned narrower than the wide end pipe (16 / Fig. 1)

In the exemplary embodiments shown in FIGS. 1 and 2, no liquid can penetrate into the ventilation openings (20 / FIGS. 1 and 2) arranged on the side during mixing and tipping and thus cannot flow out of the safety ventilation pipe (13)

This unpressurized safety system prevents often aggressive and or toxic liquids from leaking through the safety ventilation pipe (13) even when working with care. This is a significant advantage over the known Erlenmeyer separators, particularly for safety reasons

In Fig. 1 the mixing of the liquid extraction components with magnetic stirrer (29) is shown and in Fig. 2 the separation function or the separated liquid phases after tipping over by 180 °

The maximum working volume varies between 45 and 55% of the volume of the Scheidtπchter vessel (1), depending on the size and type of the vessel and is clearly marked

The length of the separating funnel insert (3) varies depending on the size and type of the separating vessel (1) and ends with the drip tips (17) about 2-5 mm above the marking (30) of the maximum working volume on the separating vessel (l)

The safety ventilation pipe (13 / Fig. 2) can be extended to the outside at the side melting point in the connecting pipe (8) with a gassing nozzle (28 / Fig. 2) with which special work for example in the event of air exclusion. The gassing nozzle (28 / Fig. 2) can optionally also be melted onto the safety ventilation pipe (13 / Fig. 1)

The maximum security volume of the upper security rooms (22 / Fιg 1) or (22 / Fιg 2) and the spherical or cylindrical lower security rooms (21 / Fιg 1) or (24 / Fιg 2) is achieved with optimal dimensioning the pipe cross sections, the length of the outer pipe (14) and the safety pipe (19) as well as the spherical or cylindrical extension (15 / Fig. 1) or (23 / Fig. 2), with respect to the size and type of the separating funnel vessel (1 )

The outer diameter of the wide end pipe (16 / Fig. 1) or narrow end pipe (27 / Fig. 2) is preferably approximately 10 mm or 6 mm, but can be approximately 10-16 mm or approximately depending on the size and type of the separating funnel vessel (1) 4-8 mm

The angles of the simple or diametrically tapered wide tailpipe (16 / Fig. 1) and the narrow tailpipe (27 / Fig. 2) are preferably approximately 30 °, but can be approximately 20- depending on the tube diameter and the size and type of the separating funnel vessel (1). 45 °

The overlapping convex or pointed safety tip (25 or 26 / Fιg 2) on the safety tube (19 / Fιg 2) as well as the spherical or cylindrical lower safety space (21 / Fιg 1) or (24 / Fιg 2) or the bevelled width Tail pipe (16 / Fig. 1) or narrow tail pipe (27 / Fig. 2) can optionally be arranged on the safety ventilation pipe (13)

The SAFETY separating funnels according to the invention can be produced and used in different sizes. They are preferably made of borosilicate glass 3 3, with a wall thickness of about 1-5 mm, but can also be made of quartz glass and transparent plastics. They can be used to prevent photolytic decomposition of light-sensitive substances be coated on the outside with UV radiation-absorbing transparent materials. The conical sections (6 and 7) shown in the drawings Fig. 1 and 2 are preferred exemplary embodiments. In general, however, spherical and plane sections or screw connections can be attached as connecting elements (5) Other valves can be attached. For special cases, one-piece embodiments can also be produced, with both parts being fused instead of the connecting element (5). A closable connecting piece can be attached to the separating vessel (1) be attached, for filling the processing components and / or a stirring element, such as a magnetic stirrer rod. The one-piece embodiment is particularly suitable for manual or mechanical shaking technology, which is usually used with conventional separating funnels

The models 1 and 2 made of borosilicate glass 3 3 with suitable separator containers from about 50 ml to 5 liters are particularly suitable for use in research, development, operation and quality control laboratories. As separator container (1) For example, Erlenmeyer flasks, standing flasks, round-bottom flasks and bottles of any cross-sectional shape can be used

The new SAFETY separating funnels can be used in laboratory technology, for example for liquid / liquid extractions, at different temperatures without pressure. They meet the requirements for optimal function, efficient working technology and high work safety, which are important for working in chemical, biochemical and medical laboratories are required

Claims

claims

1. SAFETY separating funnel with a separating vessel (1) and a separating funnel insert (3) with a connecting tube (8) which is coaxially elongated above a connecting element (5) and a subsequently narrower tube (9) with a friction valve (10 ) and a bevelled drain pipe (11), a safety ventilation pipe (13) being melted on the side in the connecting pipe (8) directly above the connecting element (5) and then bent downwards at right angles and coaxially extended with an outer pipe (14 ), a spherical extension (15 / Fig. 1) or a cylindrical extension (23 / Fig. 2) and a wide end pipe (16 / Fig. 1) with drip tips (17), characterized in that a wide end pipe (16 / Fιg 1) or narrow tailpipe (27 / Fιg 2) with drip tips (17) about 2-5 mm above the level (18) of half the volume of the separating funnel vessel (1) ends and a safety tube (19) with a top outer pipe (14) and the safety ventilation pipe (13) is coaxially fused and ends in the bottom half of the spherical lower safety room (21), directly after the side and flush-mounted ventilation opening (20)

2. SAFETY separating funnel according to claim 1, characterized in that an outer tube (14 / Fιg 2) with a cylindrical extension (23 / Fιg 2) and a subsequent narrow end tube (27 / Fιg 2), with drip tips (17 / Fιg 2), is connected coaxially, a safety pipe (19 / Fιg 2) coaxially melted on the top in the outer tube (14 / Fig 2) and on the safety ventilation pipe (13 / Fig 2) in the lower half of the cylindrical lower safety Room (24 / Fιg 2) with an approximately 1 -3 mm overlapping convex or pointed safety cap (25 / Fιg 2) or (26 / Fιg 2) is fused, flush with the side ventilation opening (20 / Fιg 2)

3. SAFETY separating funnel according to claim 1 and 2, characterized in that the outer diameter of the outer tube (14) is about 3 mm smaller than the narrowest inside width of the inner connecting element (7) or other connecting elements and connecting pipes

4. SAFETY separating funnel according to claim 1 and 2, characterized in that the outer diameter of the safety tube (19) can be about 4-10 mm

5. SAFETY separating funnel according to claim 1 and 2, characterized in that the outer diameter of the spherical lower safety room (21 / Fig. 1) and the cylindrical lower safety room (24 / Fig. 2) is about 3 mm smaller than the narrowest clear width of the outer connecting element (6) or other connecting elements and connecting pipes

6 SAFETY separating funnel according to claim 1 and 2, characterized in that the spherical lower safety room (21 / Fig 1) or the cylindrical lower safety room (24 / Fig.2) between the outer pipe (14) and the wide end pipe (16 / Fig.1) or narrow end pipe (27 / Fig.2) below the connecting element (5) is arranged such that with respect to the size and shape of the separating funnel vessel (1) the maximum safety volume is achieved through the optimal length of the outer tube (14) and the safety tube (19) as well as the spherical or cylindrical tube extension (15 / Fig. 1) or (23 /Fιg.2)

7. SAFETY separating funnel according to claim 1, characterized in that the outer diameter of the wide end pipe (16 / Fig.1) can be about 10-16 mm and the clear width about 8-12 mm.

8. SAFETY separating funnel according to claim 1 and 2, characterized in that the outer diameter of the narrow end pipe (27 / Fig 2) can be about 4-8 mm and the clear width about 2-6 mm

9. SAFETY separating funnel according to claim 1 and 2, characterized in that a ventilation opening (20 / Fig. 1 and Fig. 2), with about 2-5 mm diameter, on the safety tube (19 / Fig. 1 and Fig. 2) is arranged laterally below, namely flush-mounted directly above the convex or pointed fusion of the safety tube (19 / Fig. 1 and Fig. 2).

LO SECURITY separating funnel ge ass claims 1 and 2, characterized in that the separating funnel insert (3 / Fιg.1) or (4 / Fιg.2) with a standing piston (2) or an Erlenmeyer piston by means of a conical ground joint ( 5) is combined.