Jacketed glass reactor price | Glass reactor manufacturer
The glass portion of the jacketed glass reactor is made of borosilicate glass, which is very popular in chemical laboratory equipment. Mainly because of its corrosion resistance and heat resistance.
Due to the ductility and properties of the borosilicate glass, the price of the glass reactor is higher.
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Next, we will introduce some borosilicate glass.
Today, the world uses 3.3 borosilicate glass to manufacture chemical anti-corrosion equipment and pipe fittings, and laboratory glass instruments. 3.3 borosilicate glass is an abbreviation for boric acid glass with a coefficient of expansion of (3.3 ± 0.1) × 10 / K, and is collectively referred to as Pyrex glass in the world.
International standard IS03587 stipulates: glass tubes and fittings for chemical equipment must be made of 3.3 high boric acid glass. Hefei Yangmai Scientific Instrument Co., Ltd. glass pipes and equipment are all manufactured by international standard 3.3 high boron glass.
3.3 borosilicate glass properties
Properties of 3.3 High Borosilicate Glass
Chemical composition (% by weight)
SiO2 80.4% B2O3 13% AI2O3 2.4% Na2O 3.9%
Physical Property
Average line (thermal) expansion coefficient: (20-300 ° C) (3.3 ± 0.1) ×10-6K-1
Density at 20 ° C: 2.23g/cm3
Ultimate tensile strength: 35-100Nmm*(-100)
Modulus of elasticity E: 64KNmm (-100)
Poisson's ratio u: 0.2
Heat resistance Heat Resistance
Glass is a poor conductor and brittle material, but 3.3 borosilicate glass is different, and its thermal stability is greatly improved due to 12.7% of B203 in its chemical composition.
ISO3587 states:
High borosilicate glass products with diameter <100mm, thermal shock resistance temperature does not exceed 120 °C
High borosilicate glass products with a diameter >100mm, the thermal shock resistance temperature does not exceed 110 °C
When the glass equipment is heated above 100 °C, special protection should be taken to avoid splashing cold water on the glass equipment to avoid cracking.
Under constant pressure (20 ° C - 100 ° C)
Heat transfer performance
Average thermal conductivity: (20-100℃)λ=1.2Wm-¹K-¹
Average specific heat: CP=0.98Jg-¹K-¹
Glass tube exchange heat exchanger
K=222.24V (coil of water-water system)
K=505.36V (shell side of water-water system)
K=370.75V (shell side of steam-water system)
Glass coil heat exchanger
K=334.1V (coil of water-water system)
K=264.9V (water-water system shell side)
K=366.76V (steam-water system coil)
Chemical stability
3.3 The borosilicate glass is more chemically stable than any other known structural material and is very stable to water, acids, salt solutions, organics, and even halogens such as chlorine and bromine.
3.3 borosilicate glass also has quite good corrosion resistance to alkaline solutions. Water resistance Grade 1 (Test method and classification of water resistance of GB6585 glass granules at 98 ° C)
(GB12416.2 glass particles at 121 ° C water resistance test methods and points
Optical performance Optical Performance
Glass chemical equipment is transparent and intuitive, and is loved by operators.
3.3 borosilicate glass can pass 92% of visible light, no obvious absorption in the visible spectrum, so it appears clear and colorless.
In the photochemical process of the glass device, 3.3 borosilicate glass is particularly important for the transmission of ultraviolet light.
The ultraviolet transmittance at a wavelength of 360-400 nm is 90-92%, and the infrared transmittance is also 92%. Since the ultraviolet light is permeable, photochemical reactions such as chlorination and chlorosulfonation can be achieved in the material.
The chlorine molecules absorb in the range of 280 to 400 nm and thus function as a radiant energy carrier.
For the use of a photosensitive material, the surface of the glass may be brown, which strongly absorbs light in the short-wave range, and the absorption section of the brown glass is around 500 nm.