Wholesale Food Grade Diatomite Diatomaceous Earth Clarification and Filtration of Alcohol

• Appearance: Granule
• Color: Yellow
• CAS Number: 68855-54-9
• Mf: Sio2
• Other Names: Diatomaceous Earth/Kieselguhr
• Package: 25kg/Bag
• Model NO.: Powder
• Grade Standard: Industrial Grade and Food Grade
• Length of Particles: 0.05-0.8mm
• Density: 1.9-2.3G/Cm3
• Melting Point: 1650-1750 °c
• pH Volume (10%Suspended Solids): 7-13
• Water Solubility: Insoluble
• Surface Area: 40-65m2/G
• Sio2 Content: ≥ 75%
• Al2O3 Content: 3-6%
• Moisture(H2O) Content: 0.8~3.5%
• Transport Package: 25kg/Bag
• Specification: 0.05mm to 0.8mm
• Trademark: HUABANG
• Origin: Hebei, China
• HS Code: 3802900090
• Production Capacity: 5000 Tons/Month

Product Description

Diatomite
CAS Number	68855-54-9
EINECS Number	NA
MF:	SiO2
Other Names :	Diatomaceous earth/kieselguhr
Package :	25kg/bag
Grade Standard :	Industrial Grade and Food Grade
Appearance :	White, off-white, gray and light taupe powder
Length of particles :	mm	0.05-0.8
Density :	g/cm³ (20 °C)	1.9-2.3
Melting point	°C	1650-1750
Boiling point :	°C	2200
pH Volume (10%suspended solids)	-	7-13
Water Solubility :		INSOLUBLE
Surface area :	m2/g	40-65
Water absorption :	times	2-4
SiO2 Content :	%	≥ 75
Al2O3 Content :	%	3-6
Fe2O3 Content :	%	1-1.5
CaO Content :	%	0.2
K2O Content :	%	1.9
Na2O Content :	%	0.6
MgO Content :	%	1.1
Moisture(H2O) Content :	%(m/m)	0.8~3.5%

Diatomaceous earth (DE) filtering and related equipment are an alternative to cartridges and are available to handle higher flow rates. In fact, disposable cartridges already coated with DE are offered by some suppliers. DE is a granular material composed of the skeletal remains of diatoms. Before it can be used as a filter medium, it must be deposited in a dense layer on a porous substrate forming a filter cake. If the filter cake is not uniform, there can be partial short-circuiting of the filter. The substrate is a cloth-like material, often polypropylene, in the shape of a long tube or two-sided flat plate (leaf). This material, usually called the sleeve, is removable because it may be periodically cleaned or replaced. This cloth has no structural strength and must be supported by a core structure. There are basically two types of DE units. One is called a gravity unit with the supply side at atmospheric pressure. This type is powered by a partial vacuum on the discharge side. The other type is a pressure DE unit driven by a pump on the supply side. Both types require a preparation cycle to establish the DE layer on the porous substrate by addition of DE to the supply side in a closed loop. Once in the operating mode, the filter run can often be greatly lengthened by the continuous addition of small amounts of DE to the unfiltered water. Filter runs are highly variable and dependent on conditions, but are often designed to be normally about 24 h. Once dirty, the DE filter is backflushed and a new filter cake established to complete the cleaning cycle. Very little pressure is required to backlash, since the filter cake is only held to the substrate by operating pressure or partial vacuum. The performance of the DE filter is determined by the specifics of the DE material used, the equipment, operating conditions and the servicing procedures (Spotte, 1979). DE equipment can be expensive to own and operate, sometimes requiring considerable servicing and labor.