Bitumen Asphalt production

Bitumen Asphalt Production:

Material with a boiling point greater than around 500 °C we consider asphalt. Vacuum distillation separates it from other components in crude oil. The resulting material is typically further treated to extract small but valuable amounts of lubricants and to adjust the properties of the material to suit applications. In a de-asphalting unit, the crude asphalt is treated with either propane or butane in a supercritical phase to extract the lighter molecules, which are then separated. Further processing is possible by “blowing” the product: namely reacting it with oxygen. This step makes the product harder and more viscous.

we store Asphalt and transported at 150 °C. Sometimes diesel oil or kerosene we mixed in before shipping to retain liquidity. So before delivery, they must separate these out of mixture. This mixture we often call “bitumen feedstock” BFS.
The backs of tippers carrying asphalt, as well as some handling equipment, are also commonly sprayed with a releasing agent before filling to aid release. Because of environmental concerns Diesel oil not uses as a release agent.

Oil sands:

Naturally occurring crude bitumen impregnated in sedimentary rock is the prime feed stock for petroleum production from “oil sands”, currently under development in Alberta, Canada. Canada has most of the world’s supply of natural bitumen, covering 140,000 square kilometres, giving it second-largest proven oil reserves in the world. The Athabasca oil sands are the largest bitumen deposit in Canada and the only one accessible to surface mining, although recent technological breakthroughs have resulted in deeper deposits becoming producible by in situ methods.

Because of oil price increases after 2003, producing bitumen became highly profitable, but as a result of the decline after 2014 it became uneconomic to build new plants again. By 2014, Canadian crude bitumen production averaged about 2.3 million barrels (370,000 m3) per day and they projected to rise to 4.4 million barrels (700,000 m3) per day by 2020. The total amount of crude bitumen in Alberta that they could extract and they estimate to be about 310 billion barrels (50×109 m3), which at a rate of 4,400,000 barrels per day (700,000 m3/d) would last about 200 years.

Alternatives and bioasphalt:

Although un-competitive economically, asphalt can be made from non-petroleum-based renewable resources. Also can made from waste material by fractional distillation of used motor oil. That may cause premature cracking in colder climates, resulting in roads that need to be repaved more frequently.

asphalt

Nonpetroleum-based asphalt binders we can made light-colored. Lighter-colored roads absorb less heat from solar radiation, reducing their contribution to the urban heat island effect. Parking lots that use asphalt alternatives are called green parking lots.

Albanian deposits
Selenizza is a naturally occurring solid hydrocarbon bitumen found in native deposits in Selenice, in Albania. The bitumen that we found in the form of veins, filling cracks in a more or less horizontal direction. Bitumen content varies from 83% to 92%, with penetration near to zero and

120 °C softening point. The insoluble matter, consisting mainly of silica ore, ranges from 8% to 17%.

Today mines exploited in open pit quarry. Many underground mines still remain viable. Selenizza produced in granular form, after melting bitumen pieces selected in mine.

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Oxidized-Bitumen

Oxidized Bitumen

Oxidized Bitumen is blown asphalt which is exporting in various grades as Blown bitumen 115/15, Oxidized-Bitumen 90/40,75/25, 85/25, 90/15, 105/35, 150/5 95/25 and any other grade will produce according to order.

pub-ltd is a dynamic and multi-faceted limited company actively involved in manufacturing procurement distribution and export of various grades of oxidized bitumen. We are structured into focused on oxidization of Bitumen division to serve the different needs of our customers worldwide.

We have a long history of supplying Oxidized Bitumen to bitumen factories, asphalt companies, roof insulation companies and membrane sheet manufacturer

There is more than 7 types bitumen. Their providing depend on the type of weather conditions.  Oxidized-Bitumen or blown bitumen is one of them.

Hard asphalt grades are suitable for sealing saw cuts and joints where there is expected to be the minimum amount of moving in the joint. Their wide temperature range prevents bleeding in high temperature applications. Oxidized-bitumen can also be used in industrial applications like roofing, flooring, mastics, pipe coatings, electrical uses.

Oxidized-Bitumen

What`s Oxidized-Bitumen?

Some of main advantages of Oxidized-Bitumen are that it`s completely water resistant, highly flexible and durable. In addition, chemically it`s very stable. Hard Bitumen is a very flexible compound also a very durable compound. Lastly, Oxidized Bitumen has some very prominent technical advantages that makes it a very sought after compound in various uses.

It produced by passing air thru soft bitumen penetration under controlled temperature states. British Standard grades (BS 3690) normally designated by two numbers representing mid-points of softening point and penetration ranges. Bitumen used in many  industries including roofing, flooring, pipe-coating etc.

Oxidized-Bitumen also known as hard bitumen, hard asphalt, blown bitumen, bitumen oxide and blown asphalt in industry. blown asphalt is grading in various degrees. The most popular grades of this product includes bitumen oxide 115/15, oxidized bitumen 90/10 also blown bitumen 90/15

 

 How to produce Oxidized-Bitumen (Blown Bitumen)?

 Production process:

  1. Bitumen heating to 265-270 °C
  2. Transferring melted bitumen to blowing towers
  3. Blowing air to bitumen
  4. Cooling melted bitumen with water
  5. Packing

The procedures of producing bitumen are as follows:

  1. Continuous blowing procedure
  2. Discontinuous blowing procedure

These two procedures are done by other two procedures named catalysis and anticatalysis .

Catalysis means adding some chemical material during the process In order to decrease blowing reaction time.

For the following reasons:

Ease and simplicity in changing blowing condition and have production with different grades as a result.

In generating unit.

Technology and also low expense in investment.

Uninterrupted production

Technical point and operating conditions are as follows:

Admixture of air and  volume of blowing air is two important variants in blowing process.  In bitumen producing plant, bitumen 60/70 is usually got by blowing. To making bitumen 90/15 or 85/25 distilled used oil or crude oil should be injected to product according to 20-25 % otherwise  fragility in bitumen lead to inferior production.

Increasing the heating temperature, air injection amount, time and tower pressure increase speed of production process reaction. Fine production temperature is 265-270°C. It should be under control. At 288°C reaction gravity becomes fast and incontrollable. It may cause to explosion in tower.

Bitumen should deliver to drum or tanker after providing because standing bitumen in tower is not in favor of system

when liquid surface in tower get low, Add to system should not be more than particular limit. Because extra air gather in empty parts lead to ignition nearly. Keeping high temperature inside tower causes explosion and en-damage system. Air injection done in 190-232°C. The final point of blowing is specified by sampling and testing of bitumen properties. Finally, product temperature should  kept 150- 165 °C for loading and packing capability.

Oxidized-Bitumen

The production process is as follows:

The producing operation of oxidised asphalt mainly includes tank loading different steps, bitumen blowing, condenser external gases and packing. Firstly loose bitumen shipped to tanker. By increasing bitumen value, blowing also increases so it may overflow because blowing tower filled up to 70 %.

Air injection usually done when temperature reachs to 190-230 °C.

Blowing operation:

Bitumen dispread monotonously in phase via nozzel For gradual heating also pipes filling with the air enteres from top  and bottom of tower . In oxidation process light molecule, volatile gases and steam emitted from top of tower.

Blowing  we do in 215-290°C but the suitable temperature is 265 – 270°C. Blowing should done from bottom of blowing tanker. Bitumen and air reaction is calorific . controlling the reaction temperature is by water injection.

Blowing end point:

Blowing end point is usually signified by sampling from tower and bitumen properties testing. The blowing operation stops when oxidized bitumen reaches to specified properties. After this in order to fix the final point and depolymerization bitumen got in high temperature.

Produced gas and steam entered the condansor through pipe fixed at top of blowing tower, includes smelling gases, oily and volatile parts. Then transfer to sewage tend with water. Other gas  parts emittes from top of condenser. Then transfer to furnace and burned there. After cooling, blowing oven and reaching to 150-160°C. In addition all blowing content oven which is hard bitumen. It`s able to loading and packing. Because of liquid height in blowing tower, it transferred by specific gravity. There is no need to use pump. It packes in carton, Kraft and poly bags. For fast operation (preventing from cooling & hardening) in every section several taps are fixed so that it can fill specific drum and carton with bitumen in same time.

Blown asphalt packing:

pub-ltd is manufacturer of all blown asphalt`s all grades. There is varius kind of packing for hard asphalt:
Blown asphalt packed in 25 or 50kg meltable polyamide bag. The melting temperature of the bag is 160~180C. Blown asphalt packed in 25 or 50Kg Craft bag. The size bags is 90x40cm. It easily palletized 1 ton on wooden pallet.
Blown asphalt  also packed in carton mold. It is easy to handle and safe for shipment. in addition we are able to packe hard bitumen in Kraft bags with ability to palletize.

 

Blown Asphalt Grades specification:

Bitumen Oxide all grades TDS for download

 

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Blown Bitumen 115/15

About Blown Bitumen 115/15:

By passing air through Bitumen penetration 60/70, Oxidized bitumen grades like Blown Bitumen 115/15 are produced. This process gives bitumen more rubbery properties. Also they are harder bitumen. Hard bitumen under controlled temperature conditions. We widely use that as an anti-slip layer compound in piling industry, for manufacture of roofing felts, roofing and waterproofing industries, sound dampening felts and under carriage sealant in automotive industry, electric cable joint protection, joint filling compound, sealant compound and more. Also we use in sealing saw cuts and joints.

In addition we use that in manufacturing of bituminous marine mastic for oil & gas pipeline joints.
Oxidized bitumen is a very flexible compound that is not only chemically stable but also a very durable compound apart from being completely water resistant. It`s highly flexible and durable. Furthermore, it`s chemically very stable.
Lastly, Oxidized Bitumen has some very prominent technical advantages that makes it a very sought after compound in various uses.

Blown Bitumen 115/15 Test Data Sheet:

Oxidized Bitumen 115-15 TDS

Oxidized bitumen 115/15

Oxidized Bitumen 75/25

Oxidized Bitumen 75/25

Oxidized Bitumen 75/25

DESCRIPTION
Oxidized bitumen 75/25 is based on petroleum bitumen which is made by blowing bitumen 60/70 by very hot air.

RECOMMEND USES
IT IS USING AS RAW MATERIAL FOR BITUMEN COAT, ROOFING, INSULATION AND ISOLATION BITUMEN MEMBRANE SHEET.

SURFACE PREPARATION
SURFACES MUST BE DRY, CLEAN AND FREE OF LOOSE PARTICLES, FORM WORK, CURING PRODUCTS, IRREGULARITIES, SLURRY, ETC.

APPLICATION
However THE OXIDIZED BITUMEN SHOULD BE HEATED DOUBLE TEMPRATURE AGAINST THE SOFTENING POINT TO BE ABLE TO HAVE FLOW AND VISCOSITY.

STORAGE/HANDLING
10 YEARS WITH MULTI TIME HEATING AND COLDING, PLEASE REFERE TO MSDS.

PACKING
AVAILABLE IN 25KG MELTABLE AND CRAFT BAG, DRUM PACKING.

ANALYZE

TEST SPECIFICATION

STANDARD RANGE

TEST METHOD

Specific gravity @25/25 C

1.05 approx.

D-70

Penetration @25C

20/30

D-5

Softening point C

70/80

D-36

Ductility@25C

1.5min

D-113

Loss on heating (wt)%

0.2max

D-6

Flash point C

260min

D-92

Solubility in CS2 (wt)%

99min

D-4

Specific gravity @25/25 C

1.05 approx.

D-70