Goel Scientific Glass Works Private Limited

INTRODUCTION

Commercial Hydrochloric Acid is available in the market as 30% aqueous solution. But for certain applications e.g. bulk drug and pharmaceuticals, HCL is required in anhydrous state for critical reactions where moisture cannot be tolerated. Such users generate anhydrous HCL fom commercial grade for their captive consumption.

METHOD

Several methods have been adopted by industries. But generation by Sulphuric Acid Route and Boiling Route are commonly practiced.

We offer Calcium Chloride Route also.

In many operations like reaction, extraction and absorption, the transparency of glass is a particular advantage. For such processes a range of column components are available in Borosilicate glass which offers many advantages like :

- Insert to almost all chemicals hence no risk of contamination.

- Transparency allows visual monitoring of the process, flow patterns, colour changes etc.

- Almost universal resistance to corrosion.

- Smooth surface permits easy cleaning and prevents fouling.

The couplings used with glass equipment are important from two main points of view :

• They must ensure the effective seal of the joint.

• They should not induce any undue stress in the glass.

• They must be reliable in all service conditions.

In this section we have covered couplings to join glass components together as well as to join glass component with a other metal equipment.

PTFE bellows are available for normal and vacuum applications together with flanges to connect them to glass or non-glass equipment.

The overall heat transfer co-efficient of Borosilicate glass equipment compare favorably with many alternative materials because of its smooth surface which improve the film coefficient and reduce the tendency of fouling.

Heat exchangers are available in two basic types: Coil Type and Shell & Tube Type.

Introduction A brief introduction of evolution of CYLINDRICAL SHAPED Rotary Film Evaporator made of Borosilicate Glass!! - All NEW Innovation from GOEL, India. Rotary Film Evaporator is a very regular usage product in the R & D of chemical & Phamrmaceutical industry. It is also being used nowadays for manufacturing purpose for high value pharmaceutical & spiciality chemical products. The existing rotary film evaporators, which are used are with spherical evaporating flasks. What happens is when the requirement of volume for process it is practically very difficult to handel the size beyond 50 liters. Chemical reactor are cylindrical in shape with a perticular L/D ratio in general, which are given for a perticular reaction surface area. The cylindrical vessel has a higher surface area spherical vessel. This promped us to think in the direction; why only spherical vessel is used when we can exploit the advantage of cylindrical shape evaportion flask in a rotary film evaporator. Thus the innovation for a better rotary film evaporator with better efficiency in terms of rate of evaporation was done. The results showed that the rate of evaporation was enhanced 20% as compared to convention spherical shaped rotary film evaporator. Also the mechenical stability was far superior to spherical vessel, indicate drive rotary film evaporator. Then we disigend the largest Rotary Folm Evaporator Jumbo Rotary, capacity 400 Ltr made from Borosilicate Glass 3.3 Cylindrical Evaporation flask. in spherical flask rotary film evaporator the drive is inclied the flask held from it's neck only. Thus a inclined cantilever type of loading happens on the roating assembly. This is highly unstable mechanically as for the same neck size of flask, higher stresses develop in the flask neck compared to a horizontal drive simply supported flask as in the case of cylindrical rotary film evaporator. The cylindrical flask of the jumbo rotary evaporator is also held by the neck, but the drive centerline is not inclined,instead it is horozontal. The rotating flask is also supported axially at two cross-section circumference over it's whole length, thus making the loading effectively a simply supported one and not a cantiver type. This reduces the stresses on the neck of the flask and is the only safer solution for making higher size rotary film evaporator. Another advantage of the cylindrical flask is it's lower diameter compared to a spherical flask for a perticular volume which is a very critical factor for glass MOC as the pressure rating goes down drastically with the increse in diameter. Also material removal & cleaning becomes easier from the cylindrical rotary film evaporator. It is simply opening the quick realese coupling from one end. The meterial can be easily scooped out where in spherical rotary film evaporator the whole flask is to be seperated out & spherical flasks become too bulky abd handling becomes very difficult for size above 100 Ltr. This devlopment has overcome the constraint of the size in Rotary Film Evaporators from laboratory scale application to industrial applications for size above 100 Liters i.e.

Borosilicate glass pipeline offer many advantages for its use in chemical, pharmaceutical and drug industries because of its following characteristics.

	Inert to almost all chemicals, hence no risk of contamination and no unwanted flavours or colours are imparted into product.
	Transparency allows visual monitoring of the process, flow patterns, colour changes etc.
	Almost universal resistance to corrosion. A long service life is guaranteed.
	Smooth surface permits easy cleaning and prevents fouling

INTRODUCTION

Rotary Film Evaporator is essentially a thin film evaporator. The rotating flask continuously covers a large surface area with a thin film which is ideal for rapid heat transfer Fortuitously, the thin film also ensures uniform heat distribution without local heating. The facility to work the unit under full vacuum further facilitates evaporation at as low temperature as possible. That is to say, both boiling point and residence time are significantly reduced. These features combined, renders rotary film evaporator to be ideally suited for evaporation of heat sensitive material. It is equally successful for evaporation of suspension in crystallization processes, drying of powder/ granules etc.

Rota Evaporator finds wide use from small scale laboratory set-ups to industrial operation. Goel Rotary Film Evaporator (GRFE) is preferred by both research and production facilities and has been used by laboratory and chemical, pharmaceutical and biotechnological industries.

SALIENT FEATURES :

1. Universal corrosion resistance.
2. Auto controlled, digital display of rotational speed and bath temperature.
3. Digital display of process time.
4. Automatic bath lifting.
5. Automatic bath lowering in case of power failure.
6. RS-232 Interface (Optional)
7. Withstands full vacuum.
8. Ideally suited for heat sensitive material.
9. Maintenance free working - Operational reliability.
10. Available in large sizes upto 400 Litre.
    

CONSTRUCTION :

Goel Rotary Film Evaporators are completely self contained units consisting mainly of :

• An electrically heated SS heating bath with facility for raising and lowering the height.
• Rotating flask of corrosion resistant borosilicate glass which is connected to drive by a coupling.
• The drive is a hollow glass shaft which also acts a vapor off-take pipe. The drive shaft s sealed on condenser/receiver with teflon seal. Power is transmitted to the shaft by a motor driven gear with provision for varying speed.
• Condenser/receiver arrangements are of standard design depending on the model/size.

Sight glass is a device used between any kind of non transparent pipelines to observe the flow of liquid. This can be used both in horizontal as well as vertical pipeline. Sight glass is constructed in such a way that it gives a complete view from every angle.

A sight glass consists of one glass pipe section, one metal frame, a pair of PTFE bushes and washers and an acrylic cover. Borosilicate pipe section is highly heat resistant, has excellent chemical resistance and has low thermal expansion. Metal frame is composed of two flanges which are welded with studs so that the stresses and vibrations of the pipeline do not transfer to the glass pipe section. Its check nut keeps the glass pipe section in compression and provides ease in replacement.

PTFE bushes on both sides of glass pipe section ensures that liquid in the pipeline does not come in contact with metal frame. PTFE washers are used as gaskets while fitting the sight glass in the pipeline. Acrylic cover covers the glass pipe section and protects it from outer damages.

Sight glass can be supplied with MS/SS304/SS316 frame with any standard drilling.

Standard Units/ Assemblies are multi-purpose units having flexibility of utility. These units have been standardized by incorporating all basic & essential features such as heating, stirring, condensation, fractionation, cooling etc. for multi-purpose use. Therefore, though termed " FONT view.< of point utility from Units? ?Flexi as serve actually they view constrctional Standard>

These units find use in educational institutions, R&D centers and industries. They can be conveniently and quickly modified according to specific process needs due to modular construction, Borosilicate glass offers additional benefits of universal corrosion resistance, visibility and cleanliness.

OUR EXPERTISE

We form a combine of Chemical Engineers in the field of Process engineering and its application in the glass equipments/process packages.

1. STANDARD ASSEMBLIES

• Condensation assembly over GLR
• Typical Units viz. reaction unit, Fractional distillation unit & Reaction distillation unit

2. DESIGN AND SUPPLY OF VARIOUS UNITS as per client's requirement are as under :

Absorption systems for gases such as HCl, Cl2, SO2, HBr, NH3, Br2, NOx etc.
Anhydrous HCl Gas Generation Unit by different routes viz.

• Sulphuric Acid Route
• Boiling Route
• Calcium Chloride Route
• Cyclic Route

Other units are .........

• HBr Gas Generator (By Boiling Route)
• Sulphuric Acid Dilution Units
• Hypochlorite Manufacturing Units
• MCA Condensation Assembly
• Distillation - Conversion of Batch Process to Continuous Process.
• Solvent Recovery
• Iodione Recovery
• Raw DCB Plant.
• Evaporators, Rotary Evaporators.

 

3. KNOW - HOW WITH PLANT / TURNKEY BASIS Plant for the following products :

• Bromine recovery from industrial waste / salt bittern.
• Nitric Acid Concentration
• Sodium Hypochlorite
• Sulfuric Acid concentration Unit

4. TROUBLE SHOOTING in above units as well as client's existing plant.

 

A wide variety of valves are described in this section. All the valves are made of Borosilicate glass body and PTFE plugs so that process fluid comes into the contact of glass and PTFE only. Borosilicate glass body permits the visual checking of the operation.

All the valves are suitable for operation under full vacuum conditions and a maximum temperature of 200º C.

Vessels are available in Spherical Shape from 5 to 500 liter and in Cylindrical Shape from 5 to 500 liter capacity. Cylindrical vessels can be supplied with metal/glass jackets too. All vessels are provided with a bottom outlet for which a suitable valve can be chosed from range of valves.