Suction filtration device for chemical laboratory

Abstract

The utility model discloses a suction filtration device for a chemical laboratory, which relates to the technical field of chemical experiment devices, and comprises a suction filtration bottle, the suction filtration bottle is detachably connected with a funnel through a rubber plug, the rubber plug is sleeved on a cone of the funnel, and the funnel is inserted into a bottle opening of the suction filtration bottle through the rubber plug. An annular flange is arranged on the inner wall of the funnel cylinder, a filter plate, filter paper and a positioning rubber ring are sequentially placed in the funnel cylinder, the filter plate is horizontally placed on the flange, the filter paper is horizontally placed on the filter plate, the positioning rubber ring is horizontally placed on the filter paper, the positioning rubber ring is located on the edge of the filter paper and attached to the inner wall of the funnel cylinder, and the suction flask and the funnel are fixed through a positioning support. According to the utility model, the positioning bracket is arranged to clamp and fix the suction flask and the funnel, and the funnel, the flange, the filter plate and the positioning rubber ring are arranged, so that the placement stability of the filter paper and the sealing property of the edge are improved, the filter paper can be conveniently taken out of the funnel through the movable filter plate, and the reliability and convenience during suction filtration in chemical experiments are integrally improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical laboratory equipment, in particular to a suction filtration device for chemical laboratories. Background Art

[0002] In the compound synthesis experiment, tetrakis(triphenylphosphine)palladium (160 mg, 0.14 mmol), 2-chloro-4-methylquinoline (0.75 g, 4.23 mmol), and 4-methylthiophene-3-boronic acid pinacol ester (0.95 g, 4.23 mmol) were weighed into a two-necked flask and protected from light with tin foil. The reaction system was then evacuated, filled with nitrogen, and evacuated three times on a double-row manifold, with nitrogen protection. Methanol (5 mL), toluene (20 mL), and 2.0 M saturated potassium carbonate aqueous solution (10 mL) were then injected into the reaction system via syringe. Finally, the reaction mixture was placed in an oil bath at 85°C for 24 h. After completion of the reaction, the mixture was cooled to room temperature, extracted three times with CH2Cl2, dried over anhydrous sodium carbonate, and the solvent removed under reduced pressure. The mixture was then separated by column chromatography using petroleum ether and ethyl acetate as detergents to yield Compound 1. Under a nitrogen atmosphere, compound 1 (527 mg, 2.2 mmol) and iridium trichloride trihydrate (352 mg, 1.0 mmol) were refluxed at 110 ° C for 24 h in a mixed solvent of 2-ethoxyethanol / deionized water (3:1, v / v). After the reaction, the mixture was cooled to room temperature and filtered. The filter cake was washed three times with deionized water and dried in vacuo to obtain the dichloro bridge intermediate.

[0003] During the filtration process, the filtration bottle is used in conjunction with a vacuum pump. The filtration uses a filtration bottle, vacuum hose, filter paper, rubber stopper and Büchner funnel. The filtration bottle is connected to the vacuum pump via the vacuum hose. When the funnel is placed on the mouth of the filtration bottle for filtration, the vacuum pump starts to pump air, reducing the air pressure in the filtration bottle. If there is any solution in the filter paper on the funnel, due to the effects of atmospheric pressure and gravity, these solutions will flow through the filter paper into the filtration bottle below, and the remaining solids will remain on the filter paper, thus achieving the purpose of filtration. The existing filtration device still has the following problems during the experiment:

[0004] 1. The connection between the suction flask and the Büchner funnel is directly sealed with a rubber stopper, which is not stable enough. During the operation, the shaking of the suction flask and the Büchner funnel in the experiment will affect the sealing and tightness of the connection between the two.

[0005] 2. When filtering with filter paper in a Buchner funnel, the size of the gap between the edge of the filter paper and the inner wall of the Buchner funnel cannot be guaranteed when pouring the mixture into the Buchner funnel, which affects the filtering effect. After the filtration is completed, the filter paper and the filtered solid are not easy to remove from the funnel.

[0006] In response to the above problems, we provide a filtration device for chemical laboratories. Utility Model Content

[0007] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a filtration device for chemical laboratories, which is used to improve the reliability and convenience of filtration in chemical experiments.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a suction filtration device for a chemical laboratory, comprising a suction filtration bottle, which is detachably connected to a funnel through a rubber stopper, the rubber stopper is sleeved on the cone of the funnel, and the funnel is inserted into the bottle mouth of the suction filtration bottle through the rubber stopper. An annular flange is provided on the inner wall of the funnel cylinder, and a filter plate, filter paper and a positioning rubber ring are placed in the funnel cylinder in sequence, the filter plate is placed flat on the flange, the filter paper is placed flat on the filter plate, the positioning rubber ring is placed flat on the filter paper, and the positioning rubber ring is located at the edge of the filter paper and attached to the inner wall of the funnel cylinder, the suction filtration bottle and the funnel are fixed by a positioning bracket, the upper positioning piece of the positioning bracket locks the funnel, and the lower positioning piece of the positioning bracket locks the suction filtration bottle, and the positioning bracket fixes the upper positioning piece and the lower positioning piece through an adjusting frame.

[0009] Preferably, the adjustment frame includes a screw and a nut.

[0010] Preferably, the upper positioning member includes an upper arc frame, two groups of upper pads and two groups of upper threaded adjustment rods. The upper arc frame is sleeved on the screw rod and clamped and fixed by a group of nuts on the upper and lower sides. The upper pad is rotatably connected to one end of the inner side of the upper threaded adjustment rod. The upper threaded adjustment rod is threadedly connected to the upper arc frame. The upper positioning member clamps the funnel through two groups of symmetrically arranged upper pads.

[0011] Preferably, the lower positioning member includes a lower arc frame, two groups of lower pads and two groups of lower threaded adjustment rods. The lower arc frame is sleeved on the screw rod and clamped and fixed by a group of nuts at the upper and lower ends. The lower pad is rotatably connected to one end of the inner side of the lower threaded adjustment rod. The lower threaded adjustment rod is threadedly connected to the lower arc frame. The lower positioning member clamps the suction bottle through two symmetrically arranged groups of lower pads.

[0012] The utility model has the following beneficial effects:

[0013] The utility model provides a positioning bracket to clamp the suction filtration bottle and the funnel respectively, thereby strengthening the connection stability of the suction filtration bottle and the funnel and ensuring the sealing effect of the rubber stopper connection position;

[0014] The utility model provides a funnel, a flange, a filter plate and a positioning rubber ring, and utilizes a split funnel and filter plate to replace a traditional integrated Büchner funnel. The filter paper is clamped between the filter plate and the positioning rubber ring, and the positioning rubber ring is sealed to the edge of the filter paper, thereby improving the stability of the filter paper placement and the sealing of the edge when pouring a mixed liquid, and the filter paper is easy to take out of the funnel through the movable filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a front cross-sectional view of the funnel connection position of the utility model;

[0017] Figure 3 This is the expanded view of the utility model;

[0018] Figure 4 This is a schematic diagram of the positioning bracket structure of the utility model.

[0019] In the figure: 1. filtration bottle; 2. rubber stopper; 3. funnel; 31. flange; 4. filter plate; 5. filter paper; 6. positioning rubber ring; 7. positioning bracket; 71. upper positioning piece; 711. upper arc-shaped frame; 712. upper pad; 713. upper threaded adjustment rod; 72. lower positioning piece; 721. lower arc-shaped frame; 722. lower pad; 723. lower threaded adjustment rod; 73. adjustment frame; 731. screw; 732. nut. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figure 1-4 As shown, the utility model provides a technical solution: a suction filtration device for a chemical laboratory, comprising a suction filtration bottle 1, which is detachably connected to a funnel 3 through a rubber stopper 2, the rubber stopper 2 being sleeved on the cone of the funnel 3, the funnel 3 being plugged into the mouth of the suction filtration bottle 1 through the rubber stopper 2, the tightness and sealing effect of the connection between the suction filtration bottle 1 and the funnel 3 being ensured by the rubber stopper 2, the suction filtration bottle 1 and the funnel 3 being fixed by a positioning bracket 7, the upper positioning piece 71 of the positioning bracket 7 locking the funnel 3, the lower positioning piece 72 of the positioning bracket 7 locking the suction filtration bottle 1, and the connection into an integral structure is not easy to shake;

[0022] The inner wall of the funnel 3 is provided with an annular flange 31. The filter plate 4, filter paper 5 and positioning rubber ring 6 are placed in the funnel 3 in sequence. The filter plate 4 is provided with filter holes. The filter plate 4 is placed flat on the flange 31 for stable assembly. The filter paper 5 is placed flat on the filter plate 4. The positioning rubber ring 6 is placed flat on the filter paper 5. The positioning rubber ring 6 is located at the edge of the filter paper 5 and attached to the inner wall of the funnel 3. This improves the stability of the filter paper 5 and the sealing of the edge when pouring the mixed liquid. The filter paper 5 is convenient to be taken out of the funnel 3 through the movable filter plate 4.

[0023] The positioning bracket 7 fixes the upper positioning member 71 and the lower positioning member 72 through the adjustment frame 73, and the adjustment frame 73 includes a screw 731 and a nut 732;

[0024] The upper positioning member 71 includes an upper arc frame 711, two sets of upper pads 712 and two sets of upper threaded adjustment rods 713. The upper arc frame 711 is sleeved on the screw rod 731 and is clamped and fixed by a set of nuts 732 on the upper and lower sides. The upper pad 712 is rotatably connected to the inner end of the upper threaded adjustment rod 713. The upper threaded adjustment rod 713 is threadedly connected to the upper arc frame 711. When in use, the upper threaded adjustment rod 713 is screwed to adjust the clamping distance between the two sets of upper pads 712. The upper positioning member 71 clamps the funnel 3 through the two sets of symmetrically arranged upper pads 712.

[0025] The lower positioning member 72 includes a lower arc frame 721, two groups of lower pads 722 and two groups of lower threaded adjustment rods 723. The lower arc frame 721 is sleeved on the screw rod 731 and clamped and fixed by a group of nuts 732 on the upper and lower sides. The lower pad 722 is rotatably connected to one end of the inner side of the lower threaded adjustment rod 723. The lower threaded adjustment rod 723 is threadedly connected to the lower arc frame 721. When in use, the lower threaded adjustment rod 723 is twisted to adjust the clamping distance between the two groups of lower pads 722. The lower positioning member 72 clamps the suction filtration bottle 1 through the two groups of lower pads 722 arranged symmetrically.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A suction filtration device for chemical laboratories, comprising a suction filtration bottle (1), characterized in that: The suction filtration bottle (1) is detachably connected to the funnel (3) through a rubber stopper (2). The rubber stopper (2) is mounted on the cone of the funnel (3). The funnel (3) is plugged into the mouth of the suction filtration bottle (1) through the rubber stopper (2). An annular flange (31) is provided on the inner wall of the cylinder of the funnel (3). A filter plate (4), a filter paper (5) and a positioning rubber ring (6) are placed in the cylinder of the funnel (3) in sequence. The filter plate (4) is placed flat on the flange (31), and the filter paper (5) is placed flat on the filter plate (4). The positioning rubber ring (6) is placed flat on the filter paper (5), and the positioning rubber ring (6) is located at the edge of the filter paper (5) and attached to the inner wall of the funnel (3). The suction filtration bottle (1) and the funnel (3) are fixed by a positioning bracket (7). The upper positioning member (71) of the positioning bracket (7) locks the funnel (3), and the lower positioning member (72) of the positioning bracket (7) locks the suction filtration bottle (1). The positioning bracket (7) fixes the upper positioning member (71) and the lower positioning member (72) via an adjustment bracket (73).

2. A filtration device for chemical laboratories according to claim 1, characterized in that: The adjustment frame (73) includes a screw (731) and a nut (732).

3. A suction filtration device for chemical laboratories according to claim 2, characterized in that: The upper positioning member (71) comprises an upper arc frame (711), two groups of upper pads (712) and two groups of upper threaded adjustment rods (713); the upper arc frame (711) is sleeved on the screw rod (731) and is clamped and fixed by a group of nuts (732) on the upper and lower sides; the upper pad (712) is rotatably connected to one end of the inner side of the upper threaded adjustment rod (713); the upper threaded adjustment rod (713) is threadedly connected to the upper arc frame (711); and the upper positioning member (71) clamps the funnel (3) through the two groups of symmetrically arranged upper pads (712).

4. A suction filtration device for chemical laboratories according to claim 2, characterized in that: The lower positioning member (72) comprises a lower arc frame (721), two groups of lower pads (722) and two groups of lower threaded adjustment rods (723); the lower arc frame (721) is sleeved on the screw rod (731) and is clamped and fixed by a group of nuts (732) on the upper and lower sides; the lower pad (722) is rotatably connected to one end of the inner side of the lower threaded adjustment rod (723); the lower threaded adjustment rod (723) is threadedly connected to the lower arc frame (721); and the lower positioning member (72) clamps the suction filtration bottle (1) through the two groups of symmetrically arranged lower pads (722).

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