CN202143788U - Molecular distillation apparatus easy to clean - Google Patents

Abstract

The utility model relates to a molecular distillation apparatus for purifying various target compounds in limited quantities, with multiple components and under different extraction conditions. The molecular distillation apparatus is left with few compound residues after being used, thus being easy to clean and beneficial to purifying other compounds next time. The molecular distillation apparatus easy to clean comprises a hot-end distiller, a motor, a film scraper, a cold-end collector, a base, a vacuum tube, a feeding tube, a raffinate collecting tube, a target liquid collecting tube and a sealing device, wherein the cold-end collector is fixedly arranged on the base; and non-adhesion coatings are arranged on the side wall of the smooth outer surface of the cold-end collector and the surface of a liquid collecting slot of the cold-end collector, thereby being capable of reducing absorbed residues of target compounds collected by the cold-end collector, being convenient for cleaning, and being beneficial to purifying other compounds next time.

Description

A kind of molecular still of easy cleaning

Technical field

The utility model relates to a kind of molecular distillation equipment, particularly relates to the molecular still of multiple target compounds under a kind of be used to purify small lot, multicomponent, the different extraction conditions.

Background technology

Molecular clock is called short-path distillation again; Be to be accompanied by vacuum technique and vacuum distillation technique and a kind of special liquid-liquid isolation technics of growing up; Evaporating temperature is low, vacuum is high, separation degree is high because it has, and does not have characteristics such as azeotropism, no bubbling; Be particularly suitable for higher boiling, thermal sensitivity separates with easy oxidized material.At present, this technology is widely used in fields such as food, medicine, petrochemical industry, light industry, pesticide producing, and oneself becomes an important branch in the isolation technics.

Molecular clock is the technology that the molecular motion mean free path difference of dependence different material is come the separating liquid mixture.The molecular motion mean free path be meant sometime at interval in the mean value of molecular motion free path; And the molecular motion free path be meant molecule twice continuously between the collision the distance of process.The molecular motion mean free path can be used following function representation:

${\mathrm{\&lambda;}}_m=\frac{\mathrm{<figure-callout\; id="2"\; label="k"\; filenames="HDA0000070231770000011.png,HDA0000070231770000022.png"\; state="\{\{state\}\}">k</figure-callout>}}{\sqrt{2}\mathrm{\&pi;}}\&CenterDot;\frac{T}{d^{2}P}$

In the formula: λ _m-----molecular motion mean free path k-------Boltzmann constant

D-----molecule effective diameter P-------molecule environmental stress of living in

T-----molecule environment temperature of living in

Can see λ from formula _mBe directly proportional with temperature T, and be inversely proportional to pressure P and molecular diameter d.Under identical temperature and pressure, the effective diameter of different material molecule is different with molecular free path, and the mean free path of light molecule is big; The weight molecule mean free path is little; If greater than weight molecule mean free path place one cryosurface is being set less than the mean free path of light molecule, after light molecule is overflowed from evaporating surface, not with other molecular collision from the evaporation liquid level; Directly fly to cryosurface and be condensed, be collected thereby flow downward along cold plate; And weight molecule does not reach cryosurface, reaches balance with liquid phase very soon, apparent on no longer from the liquid level effusion, and flow downward along heating plate, the mixture of weight molecule has obtained separation like this.The principle of its separation process is as shown in Figure 3, and the process of molecular clock is following:

A, component (heavy ends 1 ' and light component 2 ') molecule spread to evaporating surface from the liquid phase main body.

B, molecular free path are λ _LLight molecule e _LWith molecular free path be λ _HWeight molecule e _HFreely evaporating of liquid layer surface.

C, light molecule e _LFly to the cryosurface of cold plate 4 ' from the evaporating surface of evaporation plate 3 '.

D, light molecule e _LCondensation on cryosurface.

The molecular still that uses now mainly is made up of hot junction distiller, blade applicator and cold junction gatherer; The extraction and the purifying that generally are used for conventional in batch simple target compound; But collection and purifying for multiple target compounds under small lot, multicomponent, the different extraction conditions are then inapplicable; Mainly be because each back compound that uses is residual more, on the cold junction gatherer, be difficult for cleaning; To exerting an influence with other compound of molecular still purification next time, more obvious during especially for the micro-target compound of purification.

The utility model content

The technical problem that the utility model will solve provides the molecular still of a kind of easy cleaning of a kind of collection that is used for multiple target compounds under small lot, multicomponent, the different extraction conditions and purifying; It is seldom residual at each back compound that uses; Be easy to clean, help other compound of purifying next time.

The molecular still of a kind of easy cleaning of the utility model comprises pipe shape hot junction distiller, cold junction gatherer, base and target liquid collecting pipe, and the cold junction gatherer is positioned at the hot junction distiller; The cold junction gatherer becomes cylindric; Upper end closed, the lower end is uncovered, and the lower end of cold junction gatherer is provided with connecting ring; Offer the ring-type collecting tank on the connecting ring; The inner of target liquid collecting pipe is positioned at collecting tank, and the smooth outer surface of wherein said cold junction gatherer distiller inner surface towards the hot junction is provided with non-sticking lining, and the surface of collecting tank is provided with non-sticking lining.

The molecular still of a kind of easy cleaning of the utility model, the smooth inner wall of wherein said target liquid collecting pipe is provided with non-sticking lining.

The molecular still of a kind of easy cleaning of the utility model, wherein said non-sticking lining are polytetrafluorethylecoatings coatings or non-stick ceramic coating.

The molecular still of a kind of easy cleaning of the utility model, the wall thickness of wherein said cold junction gatherer are 1 millimeter to 1.2 millimeters.

The molecular still of a kind of easy cleaning of the utility model, the thickness of wherein said non-sticking lining are 0.03 millimeter to 0.05 millimeter.

The molecular still difference from prior art of a kind of easy cleaning of the utility model is that the sidewall of the cold junction gatherer in the utility model is provided with non-sticking lining; The surface of sidewall and collecting tank that can reduce the cold junction gatherer is residual to the absorption of collected target compound; The convenient cleaning helps other compound of purifying next time.

Be described further below in conjunction with the molecular still of accompanying drawing a kind of easy cleaning of the utility model.

Description of drawings

Fig. 1 looks cutaway view for the master of the molecular still of a kind of easy cleaning of the utility model;

Fig. 2 is along the cutaway view of A-A direction among Fig. 1;

Fig. 3 is a prior art molecular clock schematic diagram.

The specific embodiment

Like Fig. 1, shown in Figure 2; The molecular still of a kind of easy cleaning of the utility model comprises hot junction distiller 1, motor 2, blade applicator 3, cold junction gatherer 4, base 5, vacuum tube 6, feed pipe 7, raffinate collecting pipe 8, target liquid collecting pipe 9 and sealing device, and wherein 1 one-tenth of hot junction distiller is cylindric, the electric heating film (not shown) that outer surface is provided with; The upper end of hot junction distiller 1 is connected with loam cake 14 usefulness bolt; The lower end is connected with base 5 usefulness bolt, and vacuum tube 6 is fixedly mounted on the loam cake 14, is installed with motor 2 through support 15 on the loam cake 14; The output shaft of motor 2 is connected with rotating shaft 16 through shaft joint; The axis of motor 2 output shafts and the dead in line of rotating shaft 16, rotating shaft 16 is fixedly connected with blade applicator 3, and blade applicator 3 is positioned at hot junction distiller 1; Blade applicator 3 comprises connecting plate 17 and 2 scraper plates 18 that are fixedly mounted on connecting plate 17 two ends; Every scraper plate 18 all contacts with distiller 1 inwall in hot junction is flexible, and feed pipe 7 is fixedly mounted on the sidewall of hot junction distiller 1, and is positioned at blade applicator 3 tops.Cold junction gatherer 4 also is positioned at hot junction distiller 1, and 4 one-tenth of cold junction gatherers are cylindric, upper end closed; The lower end is uncovered, and wall thickness is 1 millimeter, the dead in line of the axis of cold junction gatherer 4 and hot junction distiller 1; The spacing of the inwall of the outer wall of cold junction gatherer 4 and hot junction distiller 1 is 1.5 centimetres, and the lower end of cold junction gatherer 4 is provided with connecting ring 10, and connecting ring 10 is formed in one with cold junction gatherer 4; Offer ring-type collecting tank 11 on the connecting ring 10; The target liquid that is used to collect on the cold junction gatherer 4 cohesion, on the sidewall of cold junction gatherer 4 smooth outer surface, all being coated with thickness with collecting tank 11 surfaces is 0.04 millimeter non-sticking lining 12, connecting ring 10 is fixedly installed on the base 5; Target liquid collecting pipe 9 is fixedly mounted on the base 5; And the inner of target liquid collecting pipe 9 is positioned at collecting tank 11, the inner wall smooth of target liquid collecting pipe 9, and the inwall of target liquid collecting pipe 9 is provided with 0.04 millimeter non-sticking lining 12; Raffinate collecting pipe 8 is fixedly mounted on the base 5, and between cold junction gatherer 4 and hot junction distiller 1.

Wherein non-sticking lining 12 is polytetrafluorethylecoatings coatings or non-stick ceramic coating.Wherein hot junction distiller 1, loam cake 14, base 5, rotating shaft 16, cold junction gatherer 4, connecting ring 10, blade applicator 3, vacuum tube 6, feed pipe 7, raffinate collecting pipe 8 and target liquid collecting pipe 9 are processed by 316 stainless steels.

The utility model in use, at first the electric heating film through the 1 outer surface setting of hot junction distiller makes hot junction distiller 1 be warmed up to the temperature of setting, vacuumizes through vacuum tube 6 with vavuum pump, makes the inner chamber of hot junction distiller 1 reach the negative pressure of setting; Start coolant pump, the flow through inner chamber of cold junction gatherer 4 of cooling fluid makes cold junction gatherer 4 reach the temperature of setting; Then pending sample solution is imported from feed pipe 7, actuating motor 2, blade applicator 3 is started working; Scraper plate 18 is evenly distributed on the inwall of hot junction distiller 1 liquid film, the distillation beginning, and target components is condensed on the coat side of cold junction gatherer 4; Form target liquid, after collecting through collecting tank 11, from target liquid collecting pipe 9, flow out the back and collect; The raffinate that the distillation back forms is flowed out by raffinate collecting pipe 8, is collected in the raffinate container, and distillation is unloaded the bolt on the lower bottom base after accomplishing; Clean, be not stained with coating owing to be provided with, the absorption that can reduce compound is residual; Be easy to clean, and guaranteed cleaning quality, help other compound of purifying next time.

The base of the molecular still of a kind of easy cleaning of the utility model can also be connected for snap close with the connected mode of hot junction distiller.

Above-described embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that those of ordinary skills make the technical scheme of the utility model all should fall in the definite protection domain of the utility model claims.

Claims (5)

1. molecular still that be prone to clean; Comprise pipe shape hot junction distiller (1), cold junction gatherer (4), base (5) and target liquid collecting pipe (9); Said cold junction gatherer (4) is positioned at hot junction distiller (1), and it is cylindric that said cold junction gatherer (4) becomes, upper end closed; The lower end is uncovered; The lower end of cold junction gatherer (4) is provided with connecting ring (10), offers ring-type collecting tank (11) on the connecting ring (10), and the inner of said target liquid collecting pipe (9) is positioned at collecting tank (11); It is characterized in that: the smooth outer surface of said cold junction gatherer (4) distiller (1) inner surface towards the hot junction is provided with non-sticking lining (12), and the surface of said collecting tank (11) is provided with non-sticking lining (12).

2. the molecular still of a kind of easy cleaning according to claim 1, it is characterized in that: the smooth inner wall of said target liquid collecting pipe (9) is provided with non-sticking lining (12).

3. the molecular still of a kind of easy cleaning according to claim 2 is characterized in that: said non-sticking lining (12) is polytetrafluorethylecoatings coatings or non-stick ceramic coating.

4. the molecular still of a kind of easy cleaning according to claim 3, it is characterized in that: the wall thickness of said cold junction gatherer (4) is 1 millimeter to 1.2 millimeters.

5. the molecular still of a kind of easy cleaning according to claim 4, it is characterized in that: the thickness of said non-sticking lining (12) is 0.03 millimeter to 0.05 millimeter.

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