Active alumina
1. Introduction
For the active alumina, there are such varied merits, for
instance, the properties of absorption, catalytic activation,
porous, higher dispersion, and larger specific surface areas
etc. It adapts to the drying of many gases and liquids, Further,
it can be applied to as the absorbents, drying agents, catalysts,
and carriers during many reactions in the fields of the petroleum,
chemical fertilizer, and chemical industry.
2. Types of product
For the active alumina, there areγand X-P assortments according
to the inner main crystal phase.
In accordance with the usage, it can be divided into the active
alumina absorbent, the active alumina drying agent, and the
active alumina catalyst carrier.
3. Physical and chemical properties
Variety
Property
|
Active
alumina absorbent
|
Active
alumina drying agent
|
Active alumina catalyst carrier
|
Normal
|
High
strength
|
Normal
|
Air separation
|
|
Crystal
phase
|
γType
|
X-P Type
|
γType
|
Chemical composit-ions, ％
|
AL2O3
|
≥92
|
≥93
|
≥90
|
≥95
|
Na2O
|
≤0.3
|
Other
|
6-8
|
＜10
|
＜5
|
Physical
properties
|
Outward
size, mm
|
Ø2-3
Ø3-5
Ø4-6
|
5-8
|
Ø2-3
Ø3-5
Ø4-6
|
Ø2-3
Ø3-5
Ø4-6
|
Specific
surface areas, .m2/g
|
≥300
|
300-325
|
≥300
|
350±20
|
200-400
|
Pore volume, ml/g
|
≥0.35
|
≥0.5
|
0.4±0.05
|
0.4±0.03
|
200-400
|
Static water sorption,％
|
≥15
|
17-19
|
≥15
|
≥19
|
≥28
|
Bulk density, g/ml
|
0.68-0.72
|
0.74-0.77
|
0.68-0.72
|
Abrasion
ratio, ％
|
≤0.4
|
Point
crushing strength,
|
Ø2-3
|
≥70
|
222-311
|
Ø2-3
|
≥70
|
Ø2-3
|
≥70
|
Ø3-5
|
≥100
|
Ø3-5
|
≥100
|
Ø3-5
|
≥100
|
Ø4-6
|
≥100
|
Ø4-6
|
≥100
|
Ø4-6
|
≥100
|
|
|
|
|
|
|
|
|
|
|
|
There are lots of merits for active alumina produced by our
company, for example, higher mechanical strength, well absorption
capacity, non-powdered, insolubility, higher degree of clear,
and longer serviceable lifetime etc. Since this product entered
the market, by the utilization of many plants of H2O2 and
oxygen preparing, chemical fertilizer, petroleum chemical
industry, and oil refining, it has gained the uniform appraise.
The active alumina from our company is the first substitute
for the foreign product by SINOPEC.
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WH-ACB active ceramic ball
(1) Characteristics of product
WH-ACB active ceramic ball is another novel supporting packing
of reactor, witch is commonly developed by our company and
Dalian institute of chemical physics, Chinese academy of sciences.
In fact, it is prepared on the basis of the inert alumina
by adding the micro-pore amount of transition metal oxide.
There are excellent properties of inert ball for WH-ACB active
ceramic ball (the heat resistance, mechanical strength, filtration
or dispersion of gas or liquid, and covering or supporting
of catalyst, etc.). In addition, there is well property of
catalytic activity, which can play the role of catalyst promoter
in many processes (olefin hydrogenation, desulfurization,
and denitrification, etc.). During the processes of hydrofining,
hydrocracking, reforming pre-hydrogenation, and benzene hydrogenation
for oil cut fractions, if WH-ACB active ceramic ball is loaded
above the catalyst layer in the reactor, it can induce the
mono-olefins or dienes to hydrogenate initially in the secondary
operation of crude oil. In contrast, if WH-ACB active ceramic
ball is loaded in the bottom of catalyst layer, it can also
remove the mercaptan, which is produced within some reactions.
Therefore, it can not only improve the space usage ratio,
but also on some extent to protect catalyst from poisoning
or agglutinating with WH-ACB active ceramic ball, and it can
prolong the lifetime of catalyst utilization.
(2) Chemical and physical properties of WH-ACB active ceramic
ball
|
Type
Property
|
WH-ACB-1
|
WH-ACB-2
|
WH-ACB-3
|
|
Outline
appearance
|
Yellowish
brown
|
Light
yellow
|
Light
gray
|
|
Bulk
density, g/ml
|
1.2-1.4
|
1.1-1.3
|
1.1-1.3
|
|
Specific
pore volume, ml/g
|
|
|
Spalling
resistance, △T
|
0.15-0.25
|
|
Crushing
strength, N/particle
|
500
|
600
|
600
|
|
AL2O3
content, %
|
260-3500
(Different as the specification and size)
|
|
Active
composition
|
NiO·MoO3
|
NiO·WO3
|
CoO·MoO3
|
(3) Types and specifications of WH-ACB active ceramic ball
a) Types: WH-ACB active ceramic ball can be divided into WH-ACB-1,
WH-ACB-2 and
WH-ACB-3 according to the different active composition
b) Specifications: For WH-ACB active ceramic ball, there are
12 sorts of specifications as
follow: Ø6, Ø8, Ø10, Ø13, Ø16,
Ø20, Ø25, Ø30, Ø38, Ø50,
Ø60, and Ø75. In addition,
we can provide the other types or specifications of product
as the costumers requirement.
(4) Catalytic properties
|
Item
or type
|
WH-ACB-1
|
WH-ACB-2
|
WH-ACB-3
|
|
Reactive
temperature (℃)
|
275
|
300
|
300
|
320
|
350
|
300
|
320
|
350
|
|
Partial
pressure of hydrogen (MPa)
|
3.0
|
3.0
|
3.0
|
3.0
|
3.0
|
3.0
|
3.0
|
3.0
|
|
Liquid
space velocity (h-1)
|
10
|
10
|
4.2
|
4.2
|
4.2
|
4.2
|
4.2
|
4.2
|
|
Hydrogen/Oil
(volume)
|
600
|
600
|
450
|
450
|
450
|
450
|
450
|
450
|
|
Sulfur
content (W%)
|
2.5
|
2.5
|
2.5
|
2.5
|
2.5
|
2.5
|
2.5
|
2.5
|
|
Olefin
content of (W%)
|
27.5
|
27.5
|
27.5
|
27.5
|
27.5
|
27.5
|
27.5
|
27.5
|
|
Ratio
of desulfurrization (%)
|
76
|
95
|
40
|
60
|
77
|
36
|
54
|
63
|
|
Saturated
ratio of olefin (%)
|
58
|
95
|
10
|
33
|
45
|
7
|
19
|
42
|
(5) Notice to ordering
goods
a) Customers should correctly choose the types and specifications
of WH-ACB active ceramic
ball according to the requirement of designing.
b) It may only be provided as the reference for the bulk density
of WH-ACB active ceramic ball
, and it is not as the evidence of check. Customers should
consult with our technological
personal for the concert ordering amounts.
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