DE3325736A1 - Laboratory glass apparatus - Google Patents

Abstract

A laboratory glass apparatus is characterised by a cylindrical glass vessel 1, which is fitted with a ground sleeve 2, flow baffles 12 on the inner wall of the vessel and a magnetic stirrer body 13 at the bottom of the vessel, and by a cock body 7 which consists of a ground core 3 which can be inserted into the ground sleeve 2, a two- or three-way cock 4 fused to the core, one or two outflow tubes 5 and an aeration or venting tube 8 which is introduced through a lateral perforation 6 in the cock body 7 and is preferably bent in the way shown in the drawing. The advantage of the apparatus, in addition to the possibility of being able to carry out different laboratory operations in the same apparatus, is above all that, in combination with a novel commercially available stirring tray with 15 electronically controlled rotating electromagnetic fields, it allows simultaneous stirring operations in a high installation density of the apparatuses. <IMAGE>

Description

Laboratory glassware

The invention relates to a laboratory glassware, which for example is used as a mixing or separating vessel or as a reaction vessel.

The previously available glass vessels do not have any additional equipment, through which the individual work steps can be carried out in one device. Reactions must be transferred from a reaction flask into a separating funnel ground if liquid / liquid extractions are carried out by shaking operations should be. The separating funnel must be used for low-boiling liquids opened again and again to relieve the resulting pressure. When handling Oxidation-sensitive substances can be mixed in with atmospheric oxygen very annoyingly noticeable during shaking operations. For those who are difficult to separate Liquids are these in the usual way after transferring them to a centrifuge tube centrifuged and, after separation, placed in a separatory funnel and separated.

The present invention is therefore based on the object of a laboratory glassware device to develop in which different laboratory operations can be carried out in one device are.

The solution to the problem consists in a laboratory glassware, as it is in the claims is characterized.

The laboratory glassware according to the invention is described below using an in The embodiment illustrated in the drawing is described in more detail.

FIG. 1 shows the laboratory glassware with a two-way tap in one Overall view of Figures 2 and 3, the laboratory glassware with a three-way cock in two rows vertical overall views.

The laboratory device consists of one with a SchliffhUlse 2 and flow disruptions 12 'on the inner wall of the vessel equipped with a cylindrical glass vessel 1 and a tap body 7, which consists of a ground joint 3 which can be inserted into the joint sleeve 2, one on this fused two- or three-way valve 4, one or two drainage pipes 5 and one Ventilation pipe introduced through a lateral opening 6 in the tap body 7 8 consists, which is preferably also provided with a ground joint 9 and is preferably bent in the manner shown in the drawing.

Glass vessel 1 and valve body 7 are through a standard laboratory device for securing cone joint connections, for example through on the valve body 7th on the one hand and on the other hand attached to the glass vessel 1 hooks 10 and attached to these, Holding springs 11 connecting the two parts or conventional laboratory safety clips held together. A magnetic stirrer 13 is inserted into the C1R59efaF to carry out stirring operations introduced by an externally acting rotating magnetic field in motion is moved.

The laboratory device according to the invention can with a reaction mixture or be charged to a reaction partner and thus takes on the function of a reaction flask, as he e.g. in. organic synthesis laboratory used for a wide variety of operations will. The ventilation pipe allows gaseous or liquid reactants to be added or the introduction of a protective gas.

By introducing the magnetic stirrer 13 in combination with a A rotating magnetic field acting from the outside can create a flow of liquid inside the vessel be generated. Due to the flow disturbances attached to the inner wall of the glass vessel 1 12, which have the shape of humps or other flow-guiding or -breaking May have internals, can result from the laminar flow of the liquid very a turbulent flow can easily be generated. This has an advantage over this conventional small reaction vessels in which due to the low tangential velocity turbulent liquid flows only at much higher stirrer speeds can be generated.

Therefore, the device according to the invention is also used to carry out such Operations that require very intensive mixing, such as Phase transfer reactions and shake-out operations, which are better known as scalding operations would have to call.

The device according to the invention offers these shaking operations very special advantages. For example, the equilibrium of distribution arises here of a substance between two liquid phases extremely quickly. Farther can provide the ventilation required for the previously used vibratory funnels. - for example when working with highly volatile solvents - this is not necessary because the Ventilation pipe 8 and / or the cock 4 provided for pressure equalization during operation is.

It is also possible to meter in a protective gas. Through this autoxidations can be avoided in the case of oxidation-sensitive reactants when shaking out with conventional separating funnels through the shaking process are almost inevitable in the presence of air.

Have to have two liquids that are difficult to separate from each other be separated by centrifugation, this can be done after removing the valve body 7 in the Glass vessel 1 can be made. After placing the tap body 7 fulfills the invention The device then functions as a separator.

This avoids renewed turbulence in the phases that during the transfer of the material to be centrifuged into a separating funnel, which has been customary up to now could occur. The phase separation takes place as described below.

After rotating the device around a transverse axis with no liquid gets into the ventilation pipe 8, the liquid with the higher density through the (Figure 1) or through one of the two (Figure 2 and 3) drainage pipes 5 the Device. The lighter liquid is withdrawn in the same way. For her however, the device according to Figures 2 and 3 has its own drain pipe 5 available, whereby contamination with small residues of the opposite phase is prevented.

The knee part of one of the drainage pipes 5 can be smaller as a collecting reservoir Amounts of light phase are used, which may be in front of the panning process Hahn have set. After removing the heavy phase through the unbent drainage pipe 5 and by opening the valve 4 and turning the device back around a transverse axis, the small amounts in the knee tube 5 can lighten the contents of the vessel be returned.

The device is then ready for a new extraction cycle. Of the There is a great advantage of the device, in addition to the possibility of various laboratory operations to be able to perform in the same device, above all in the fact that it is in combination with a new kind of commercially available stirring tray with 15 electronically controlled rotating electromagnetic fields simultaneous stirring operations in high installation density of the devices and thus saves time, individual mixer costs and work space.

Sign.

Claims (3)

Claims 1. Laboratory glassware, characterized by a cylindrical Glass vessel 1, which is fitted with a ground-joint sleeve 2, flow disruptions 12 on the inner wall of the vessel and a Magnetetrührkö.rper 13 is equipped at the bottom of the vessel, and one Tap body 7, which consists of a ground joint core 3 which can be inserted into the joint sleeve 2, a on this fused two- or three-way valve 4, one or two exhaust pipes 3 and a loading introduced through a lateral opening 6 in the valve body 7 or ventilation pipe 8, which is preferably shown in the drawing Way is bent. 2. Laboratory glass device according to claim 1, characterized in that the Glass vessel 1 and the tap body 7 by means of a conventional laboratory device for securing are held together by conical joints. 3. Laboratory glass device according to claim 1, characterized in that the Be- und Entiüftungsroh.r 8 is equipped at the upper end with a slide sleeve.