CN2126105U

CN2126105U - Filtering and suction filter

Info

Publication number: CN2126105U
Application number: CN 91226168
Authority: CN
Inventors: 王乃兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-10-10
Filing date: 1991-10-10
Publication date: 1992-12-30

Abstract

The utility model relates to a filtering and suction filter which relates to a chemical separation instrument. The generally used buchner leakage indicator and the conventional suction filtering bottle at home and abroad at present can cause the early crystallization of hot saturated solution in the leakage indicator to block filtering holes and reduce yielding ratio caused by rapid air cooling in hot filtration, though vessels are preheated in advance in the recrystallization process particularly in the process of the recrystallization of semimicro synthesis. Meanwhile, the saturated solution filtered out from the suction filtering bottle also carry out early crystallization by the air cooling and is uneasy to be poured out. In order to overcome the defects, the utility model is additionally provided with a water injection heating interlayer in order to improve the yielding ratio. Meanwhile, the crystallization in low temperature can be obtained by making use of the interlayer to be injected with cold water, and the product can also be dissolved in high temperature to avoid loss. The utility model has low cost and convenient production.

Description

Filtering and suction filter

The utility model relates to a kind of Chemical Decomposition instrument.At present, Buchner funnel and conventional bottle,suction that domestic and international chemical laboratory generally uses, in recrystallization process, though Buchner funnel and bottle,suction are through preheating in baking oven, yet when heat filtering owing to cooled off by air, cause in the funnel hot saturated solution catch a cold and too early crystallization stop up filter opening, reduce yield, particularly influence is bigger in trace is synthetic.Equally, in trace was synthetic, product had formed crystallization at low temperatures, but impelled the crystallization course of dissolution to accelerate when filtering because of environment temperature is higher, thereby caused damage.As select long-neck glass funnel and folded filter paper for use, even put copper hot water funnel, to cold slightly will crystallization filtrate and with the filtrate of active decolouring, because filtration is too slow, usually blockage phenomenon, and copper funnel is a heat pad, scald one's hand, price is also expensive.

The purpose of this utility model is in order to overcome above-mentioned shortcoming, a kind of filtration and suction filtration device to be provided, and it is cheap, produces easyly, is widely used.The filter tunnel and the bottle,suction of the utility model design is characterized in that reducing the wall thickness that former Bu Shi leaks meter, have designed an interlayer that can be injected into hot water or cold water, have prevented the filtrate recrystallization or have prevented that crystallization from dissolving once again; Equally, on the basis of conventional bottle,suction, design an interlayer that injects hot water, this has just prevented the phenomenon of saturated filtrate too early crystallization in filter flask.

The purpose of this utility model is to realize like this.Funnel and bottle,suction water filling are added the design of layer, and the interlayer width is 2～10mm, and the influence that can overcome vessel ambient temperature in the experimentation causes the cataclysm of mother liquor solubility and makes the drawback of the failure of an experiment.And funnel and bottle,suction can also be made model not of uniform size, can carry out the micro-semimicro pure system that is recrystallized as the funnel of bores such as 25mm, 30mm, 40mm and corresponding big or small bottle,suction, the funnel of bores such as 60mm, 80mm, 100mm and the bottle,suction of corresponding size can carry out the pure system of heavy dose recrystallization.Funnel can be made with materials such as pottery, glass, polytetrafluoroethylplastic plastics; Bottle,suction is made with glass.The vessel inwall should be thinner than outer wall, and in order to the heat conduction, wall thickness is generally at 1～3mm.

When the utility model was used for heat (cold) filtration, speed was fast, the yield height.In addition, its simplicity of design, handling ease, cheap, easy to use, but extensive use, effect is obvious.

Description of drawings:

Fig. 1: funnel positive view

Fig. 2: funnel vertical view

Fig. 3: bottle,suction positive view

Embodiment:

1, heat filtering: earlier funnel and bottle,suction are inserted the baking oven preheating, in 100 milliliters of round-bottomed flasks that reflux condensing tube is housed or conical flask, put into 9 then and restrain thick naphthalene, add 60 milliliter of 70% ethanol and 1～2 zeolite.After connecting condensed water, in water-bath, be heated to and boil, and on magnetic stirring apparatus, stir vial with magneton, slowly continue to add a small amount of 70% ethanol again, after treating to dissolve fully from the condenser pipe upper end, add 3 milliliters again, stop heating, remove water-bath, cold slightly back adds a little active carbon, and shake a little, in water-bath, heat again again and boiled 8 minutes.Simultaneously, from baking oven, take out the funnel and the bottle,suction of preheating, give by water injection hole with little triangular funnel in the interlayer of funnel and bottle,suction and inject boiling water, and give to fill up in the funnel and go up filter paper, take advantage of heat filtering after connecting with pressure rubber tubing, in order to accelerate heat filter, can suction filtration, then filter is gone in the beaker of 200 milliliters of hot solution impourings of filter flask, add a cover a surface plate to beaker, cooling is filtered with funnel and bottle,suction at last, with a small amount of 70% ethanol washing, again crystallization is moved on the surface plate, drying is weighed, and analyzes.This sets filtering device can improve yield 10% to 25%.

2, cold filtration: reactant such as N-2,4,6 trinitrobenzens-2,6 diamino-pyridine is difficult for crystallization in the reaction dissolvent dimethyl sulfoxide (DMSO), place refrigerator overnight, adopt funnel and bottle,suction to filter, inject frozen water for funnel and bottle,suction along water injection hole, the withstand voltage rubber side pipe of bottle,suction links to each other with water pump by safety flack, spreads into garden shape filter paper and moistening to funnel, taking-up makes the solution of its crystallization in refrigerator, pour funnel in batches into, with a small amount of dimethyl sulfoxide (DMSO) washed product, wash with water again behind the suction filtration, wash with ethanol at last, pull down the pressure rubber tubing of filter flask, switch off the pump, shift out product, drying is analyzed.This overlaps cold filter can improve yield 10% to 20%.

Claims

1, a kind of filtration and suction filtration device, contain funnel and bottle,suction, it is characterized in that: funnel and bottle,suction all have the water filling interlayer, its width is 2～10mm, wall thickness 1～3mm, and inwall is thinner than outer wall, and funnel and bottle,suction can be made into the model that all size differs, and materials such as their useful ceramics, glass, polytetrafluoroethylplastic plastic are made.

2, filtration according to claim 1 and suction filtration device is characterized in that: the optimum wall thickness of funnel and bottle,suction is 1.5mm, and best outer wall thickness is 2mm.

3, filtration according to claim 1 and suction filtration device is characterized in that: the wide 5～8mm of being of best water filling interlayer of funnel and bottle,suction.

4, filtration according to claim 1 and suction filtration device, it is characterized in that: the most handy ceramic material of funnel is made, and the most handy glass material of bottle,suction is made.