Beryl
[Chemical composition] beryl may contain some Na, K, Li, Cs, Rb , alkali metal. The alkali metal content is related to the metasomatism.
[Crystal structure] hexagonal crystal system; 
a 0 = 0.921 nm, c 0 = 0.917 nm; Z = 2. The beryl crystal structure is arranged in parallel with the vertical c-axis of the hexagonal ring composed of [SiO 4 ] tetrahedron, and the upper and lower rings are shifted by 25°, and are connected by Al 3+ and Be 2+ ;; the Al 3+ coordination number is 6, The Be 2+ coordination number is 4, which is distributed on the outer side of the ring, so there are wide channels parallel to the c-axis at the center of the ring to accommodate large-radius ions K + , Na + , Cs + , Rb+ + and water molecules (Fig. G-21).
Figure G-21 The crystal structure of beryl in (a) (0001) and (b) (10) 0) projection on the surface
Figure G-22 Crystal form of beryl
[Form] The crystals are mostly long columnar, and the alkali-rich crystals are short columnar (Fig. G-22), or develop into a plate shape along {0001}. There are often parallel c-axis stripes on the cylinder surface, and the alkali-free stripe is more pronounced than the alkali-containing beryl cylinder.
Physical Properties] pure beryl is colorless and transparent, common colors are green, yellow-green, pink, dark green, fresh, deep blue sea-blue gem say that blue is caused by Fe 2+, green green Called emerald, is a very precious gem, its color is caused by Cr 2 O 3 , in addition, Cs is pink, a small amount of Fe 2 O 3 and Cl is yellow green; glass luster; transparent to translucent . The cleavage is not complete. Hardness 7.5 ~ 8. The relative density is 2.6 to 2.9.
[genesis and occurrence] beryl is mainly produced in granitic pegmatite, yunyingyan and high temperature hydrothermal veins. The beryl is produced in the granitic pegmatites of Inner Mongolia, Xinjiang, and Northeast China. In pegmatite were not accountable, beryl composition substantially free of alkali, often coexist with quartz, potassium feldspar, feldspar, white mica. The beryl formed by the late sodium metabolization has a base content of up to 7.23%. This beryl is often symbiotic with minerals such as albite, spodumene , quartz and muscovite. [Identification characteristics] It is easy to identify according to crystal form and hardness and cleavage is not developed.
[Main use] is an important ore mineral of Be. Beautiful and transparent, it can be used as a high-grade gem material. Among them, emerald is the best, and its processed value is no less than diamond.
Application Field
Thin film scraper evaporator is widely used in heat interchange project. Particularly in Thermosensitive materials heat interchange, scraper are beneficial in heat interchange process, Through different design of scrapers, the distillation of complex products can be carried out. Quality result have been obtained for dissolution, stripping, reaction, degassing, deodorizing(gas) and so on.
Medicine: antibiotics, sugar solution,Methylimidazole,Mononitrile amineetc;
Food Product: Juice, Pigments, flavors, spices, enzymes, lactic acid, xylose, starch sugar, potassium sorbate;
Grease: Lecithin, VE, liver oil, oleic acid, glycerin, fatty acid, waste lubricating oil, alkylpolyglycoside, alcohol ether sulfate;
synthetic resin: Polyamide resin, epoxy resin, paraformaldehyde,PPS,PBT, propylene formate
Synthetic fiber: PTA, DMT, Carbon fiber, polytetrahydrofuran, polyether polyol, etc;
Petrochemistry: TDI, MDI, Trimethylhydroquinone, trimethylolpropane, sodium hydroxide, etc;
Pesticide biology: Herbicides such as acetochlor, propionamine, chlorpyrifos, furanol, insecticide, herbicide, acaricide;
Waste: Inorganic salt wastewateretc
Features
The equipment adopts centrifugal rotor of sliding groove, which is the latest structure evaporator abroad, The film can be formed even at low flow rate, The sediment in treatment solution attached to inner wall can be quickly removed by the movable scraper, evaporation can be increase to 40-69% compare to fixed gap scraper evaporator, listed below are features and functions:
1.High heat transfer coefficient value, high evaporative capacity, Evaporation intensity can reach up to 200kg/㎡high thermal efficiency
2.Short heating time, work under vacuum condition is much more beneficial to thermosensitive materials, keep various components without any decomposition to ensure quality.
3.It can adapt wide range of viscosity changes. High and low viscosity materials can be treated, and viscosity of materials can be as high as 100000 centipoise.
4.rotate the scraper groove can adjust material handling time in evaporator
5.Grinded and polished inner tube can avoid scaling
6.Easy to operate, production runs automatically under sealed condition.
7.Simple structure uses less area occupancy,convenient maintenance
Tube Type Heat Exchanger,U-Tube Heat Exchanger,Floating Head Heat Exchanger,Finned Heat Exchanger
Yangzhou Tongyang Chemical Equipment Co., Ltd. , https://www.tyceqt.com