Zhongyu Instrument Laboratory Distillation Tower Instrument Molecular Distillation Tower

Zhongyu Instrument Laboratory Distillation Tower Instrument Molecular Distillation Tower

Classification and core parameters of laboratory distillation tower instruments

1、 Instrument type and material

1. ‌Glass distillation tower‌

• ‌structureIt consists of a tower kettle (3000mL four necked flask), a vacuum coated jacketed tower column (diameter 25-30mm, height 1.2-1.8m), a fractionation head, and a receiving bottle, suitable for vacuum distillation and high-purity separation.

• ‌functionSupport electromagnetic automatic control of reflux ratio, achieving precise adjustment through linkage between the suspension hammer and the electromagnet.

2. ‌Stainless steel distillation tower‌

• ‌material304/316L stainless steel, with strong corrosion resistance, suitable for industrial grade solvent recovery (such as ethanol, semiconductor material purification)

• ‌specificationSmall and medium-sized equipment (such as 20mm diameter and 1.5m height) equipped with 316L stainless steel θ mesh ring packing.

2、 Key components and technical parameters

• ‌heating systemElectric heating jacket (300W) or magnetic stirring distillation kettle, supporting solid-state transformer temperature control (accuracy ± 0.5 ℃).

• ‌feedback controlSwing reflux ratio controller (adjustable from 0-99 seconds), paired with platinum resistance temperature measuring element.

• ‌Packing typeThere is a significant difference in mass transfer efficiency between bulk packing (Rascal ring) and regular packing (θ mesh ring).

3、 Price and Supplier

• ‌Glass distillation towerPrice range 266-68000 yuan

• ‌Stainless steel distillation towerThe equipment (such as molecular stills) can reach 159600 yuan and is suitable for special distillation experiments

4、 Application scenarios

• ‌Lab-scale testGlass tower is used for high-purity solvent preparation (such as electronic grade ethanol)

• ‌Industrial grade recyclingStainless steel tower is suitable for solvent recovery (such as alcohol distillation)

Note: The specific selection needs to be evaluated comprehensively based on the experimental scale (such as tower diameter, packing type) and budget

Zhongyu Instrument Laboratory Distillation Tower Instrument Molecular Distillation Tower

Analysis of Molecular Distillation Tower Technology and Equipment Selection

1、 Core principles and characteristics

1. ‌separation mechanism‌
   Based on the difference in the average free path of molecular motion of different substances, evaporation condensation separation can be achieved under high vacuum (≤ 0.001Pa), and the distance between the evaporation surface and the condensation surface should be less than the molecular free path (usually 20-50mm)

• ‌temperature controlCan operate at temperatures far below the boiling point of the material (such as separation of thermosensitive substances)

• ‌irreversibilityThe evaporated molecules directly fly to the condensation surface without the possibility of returning to the evaporation surface

2. ‌Compared to traditional distillation

3. 2、 Equipment type and structure‌

   characteristic	molecular distillation	Traditional distillation
   Operating pressure	0.1–1Pa（高真空）	Normal pressure or reduced pressure (higher vacuum)
   Separation temperature	Any temperature (temperature difference required)	boiling point temperature
   Mass transfer method	Free evaporation on the surface of liquid film	Bubbling boiling
   Applicable materials	High boiling point, thermosensitive substance	Conventional boiling point difference substances

   
   

4. ‌Evaporator type‌

• ‌Scrap film typeBy rotating the scraper, a thin liquid film (thickness 0.1-0.5mm) is formed with high mass transfer efficiency, suitable for high viscosity materials (such as fish oil DHA purification)

• ‌Falling film typeEarly structures with thick liquid films and low efficiency have gradually been phased out.

• ‌centrifugalCentrifugal force film formation, high evaporation efficiency, but high manufacturing cost and complex vacuum sealing

5. ‌key component‌

• ‌Degassing systemsRemove dissolved gases from the material to avoid fluctuations in vacuum degree

• ‌condensation systemMaintain a temperature difference of 60-100 ℃ between the smooth surface and the evaporation surface

3、 Application scenarios and selection suggestions

1. ‌Typical Applications‌

• ‌pharmaceutical industryWEI Shengsu E and extraction of effective ingredients from Chinese herbal medicine

• ‌food industryOmega-3 concentrated fish oil (such as Qiangbeiguan brand fish oil purified by molecular distillation)

2. ‌Selection parameters‌

• ‌Laboratory levelGlass material (such as high borosilicate glass), processing capacity 1-20L, price 36.1-200000 yuan

• ‌industrial-gradeStainless steel material (such as 316L), with a processing capacity of up to tons, priced at 300000 to 500000 yuan