4A Molecular Sieve with Top Quality
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- Loading Port:
- China Main Port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 1 Metric Ton m.t.
- Supply Capability:
- 10000 Metric Tons per Year m.t./month
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Molecular sieve 4A is an alkali alumino silicate;it is the sodium form of the Type A crystal strcture.4A molecular sieve has an effective pore opening of about 4 angstroms(0.4nm).Our 4A molecular sieve will adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger.Such adsorbable molecules include simple gas molecules such as oxygen,nitrogen,carbon dioxyde and straight chain hydrocarbons.Branched chain hydrocarbons and aromatics are excluded.
Molecular Formula
Na2O Al2O3 2.0 SiO2 4.5 H2O
Specification And Application
Specification | |||||
Item |
Unit |
Technical data | |||
Shape |
|
Pellet |
Sphere | ||
Diameter |
mm |
1.5-1.7 |
3.0-3.3 |
1.7-2.5 |
3.0-5.0 |
Size Ratio Up To Grade |
% |
≥98 |
≥98 |
≥96 |
≥96 |
Bulk Density |
g/ml |
≥0.66 |
≥0.66 |
≥0.66 |
≥0.66 |
Wear Ratio |
% |
≤0.20 |
≤0.40 |
≤0.20 |
≤0.20 |
Crushing Strength |
N |
≥30/cm |
≥45/cm |
≥30/p |
≥70/p |
Static Water Adsorption |
% |
≥20.5 |
≥20.5 |
≥21 |
≥21 |
Ethylene Adsorption |
% |
≤3.0 |
≤3.0 |
≤3.0 |
≤3.0 |
Water Content, As Shipped |
% |
≤1.5 |
≤1.5 |
≤1.5 |
≤1.5 |
Application | |||||
Drying and removing of CO2 from natural gas, LPG, air,inert and athmospheric gases, etc. | |||||
Removal of hydrocarbons, ammonia and methanol from gas streams (ammonia syn gas treating). | |||||
Special types are used in the air break units of buses, trucks and locomotives. | |||||
Packed in small bags, it may be used simply as a packaging desiccant. | |||||
Attention | |||||
To avoid damp and pre-adsorption of organic before running, or must to be reactivated. | |||||
- Q:Someone I hired to do my walkway used cement to rentrain the pavers edge, instead of edge restrainters. I found it very strange. I even pointed it out to him. He said it ok. Who am i do defy an experient brazilian mason.The cement is now cracking. My brand new walkway will not make thru the winter. I have already started my complain process.
- martin couch's answer is good. Edge Retainer (Curbing) This concrete should have at least one rebar running through the centre of it lengthwise.. Also about every 10 feet (3 metres) should have a stress cut.slot filled with a meterial that will keep expand and compress. These stress cuts control cracking most of the time. This edging will crack; without the stress cuts, it will crack anywhere. With the stress cuts most of the cracking will be at the cuts which will not be noticeable. About every 30 feet (9 metres), instead of a stress cut, the concrete should have a piece of tar impregnated tentest or other material to act a an expansion joint. This helps to prevent buckling when the weather is very hot. Brazilian or not, he should know the proper way to construct curbing. One point to note; if you had this job quoted on (estimates) and hired a contractor with a price much lower than anyone else, you received what you paid for. All quotes should be within approximately 10% of each other as long as you gave each contractor the same specs. An estimate which is 15% or more below the rest is one to defininately one to avoid
- Q:Final setting time of cement...?
- First is the 1st 24 hrs which then you can walk on the slab. 2nd is the next 7/8 days after which you could drive across and the final setting time is the next 30 days for the slab to cure. GL
- Q:cement effluents
- I okorder /. It is an extensive site. A search on cement effluents turned up over 3,500 results.
- Q:Where I live, winter doesn't have much snow. There is a small ski place with a snowmaker in the city that's about a 15 minute walk from my house. I've been walking there for the last few days and was worried that me walking on the sidewalk for 15 minutes a day with mith my board boots on could damage them. Can it?
- Like any footwear, they will wear out by walking on cement eventually. I would recommend not walking on cement too much with them since it will make the bottoms smooth and lose their grip and might slide a bit in your bindings. If you can, wear a pair of shoes and carry your boots. If this is too big of a hassle, just keep doing what you're doing. It won't be a big deal unless you're a very good boarder and the smallest things make a difference
- Q:if so, what did you write?I have, last May, and I wrote someone else's phone number. :-PI'm a monster!
- haha that's good..now i feel stupid for just writing my name. but let me tell you..next time i see wet cement..it's happening :P
- Q:when putting down cement backboard on the floor for tiling, can you just nail it down and skip mortar or adhessive?
- You could but you better nail or screw extra heavy. The chance of problems occuring are far less if you adhere the cement board to the existing floor.
- Q:yeah. I was wondering why tires on cement have such good friction while other materials do not.
- because cement is not as compactly put togehter as other materials such as gravel. because there is space between the concrete( hard to detect with naked eye) the tire dont as easily roll over the surface creating friction. hope it helps.
- Q:Decrease in water/cement ratio will??1)increase in strength 2)Difficult to obtain a smooth finished surface3)Decrease in strength4)Reduction in long term durability Increase in water/cement ratio will??1)Increase in strength 2)Difficult to obtain a smooth finished surface3)Decrease in strength4)Reduction in long term durability
- Decrease in water/cement ratio will result in difficulty in obtaining smooth finished surface. Increase in water/cement ratio will result in(3) Decrease in strength.
- Q:A bag of cement weighing 350 N hangs in equilibrium from three wires as suggested in the figure below. Two of the wires make angles θ1 = 61.0° and θ2 = 41.0° with the horizontal. Assuming the system is in equilibrium, find the tensions T1, T2, and T3 in the wires.T1 = T2 = T3 =
- The tension in the third wire is equal to the weight of the bag of cement. The sum of the vertical components of the tension in each of the other wires is equal to the tension in the third wire. So, the sum of the vertical components of the tension in each of the other wires is equal the weight of the bag of cement. Vertical component = T * sin θ For the left wire, vertical component = T1 * sin 61 For the right wire, vertical component = T2 * sin 41 Eq#1: T1 * sin 61 + T2 * sin 41 = 350 Since the system is in equilibrium, the magnitude of the horizontal components of the tension in each of the other wires is equal. Horizontal component = T * cos θ Eq#2: T1 * cos 61 = T2 * cos 41 T1 = T2 * cos 41/cos 61 Substitute (T2 * cos 41/cos 61) for T1 in Eq#1, and solve for T2. T2 * cos 41/cos 61 * sin 61 + T2 * sin 41 = 350 T2 * (cos 41/cos 61 * sin 61 + sin 41) = 350 T2 = 350 ÷ (cos 41/cos 61 * sin 61 + sin 41) = 173.4741944 N This is approximately 173.5 N Substitute 173.4741944 for T2 in Eq#1 and solve for T1. Eq#1: T1 * sin 61 + 173.4741944 * sin 41 = 350 T1 = (350 – 173.4741944 * sin 41) ÷ sin 61 = 270.0495844 N This is approximately 270 N. To check this answer, substitute both answers in Eq#2: T1 * cos 61 = T2 * cos 41 270 * cos 61 = 173.5 * cos 41 131 = 131 This proves that the tensions are correct! I hope that my work has helped you understand how to solve this type of problem.
- Q:I've got 50KG of portland limestone cement. I want to now how much water I need to mix for 1/4 of the amount and how long it'll take.Thank You.
- There is no real set amount of water. I always trickle some water in it and mix. If it is too dry, add more water. You want the cement to be about the consistency of slightly thicker than Catsup.
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1. Manufacturer Overview |
|
|---|---|
| Location | Rizhao, Shandong, China (Mainland) |
| Year Established | 2004 |
| Annual Output Value | US$5 Million - US$10 Million |
| Main Markets | North America; South America; Southeast Asia; Africa; Mid East |
| Company Certifications | Certificate of Quality; certificate for products exemption from quality surveillance inspecction; ISO9001 Certificate |
2. Manufacturer Certificates |
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|---|---|
| a) Certification Name | |
| Range | |
| Reference | |
| Validity Period | |
3. Manufacturer Capability |
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|---|---|
| a)Trade Capacity | |
| Nearest Port | Rizhao port |
| Export Percentage | 91% - 100% |
| No.of Employees in Trade Department | 3-5 People |
| Language Spoken: | English, Chinese, French, Russian |
| b)Factory Information | |
| Factory Size: | 3,000-5,000 square meters |
| No. of Production Lines | 3 |
| Contract Manufacturing | OEM Service Offered Design Service Offered Buyer Label Offered |
| Product Price Range | Average |
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4A Molecular Sieve with Top Quality
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 1 Metric Ton m.t.
- Supply Capability:
- 10000 Metric Tons per Year m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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