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Propane asphalt

Asphalt, prepared from petroleum, often resembles native asphalt. When asphalt is produced by distillation, the product is called residual, or straight-mn, asphalt. However, if the asphalt is prepared by solvent extraction of residua or by light hydrocarbon (propane) precipitation, or if it is blown or otherwise treated, the name should be modified accordingly to qualify the product, eg, propane asphalt. [Pg.200]

Propane Asphalt. As noted above, cmde oils contain different quantities of residuum (Fig. 2) and, hence, asphalt. Asphalt is also a product of the propane deasphalting and fractionation process (5,6,21,22) which involves the precipitation of asphalt from a residuum stock by treatment with propane under controlled conditions. The petroleum charge stock is usually atmospheric-reduced residue from a primary distillation tower. [Pg.362]

Fig. 10. The relationship between a cmde oil, two residua from the cmde oil, and the propane asphalt. Fig. 10. The relationship between a cmde oil, two residua from the cmde oil, and the propane asphalt.
Figure 1-5 Simplified relationship between petroleum, two residua, and propane asphalt. [Pg.34]

Nevertheless, in the simplest sense, petroleum can be considered composites of four major operational fractions. However, it must never be forgotten that the nomenclature of these fractions lies within the historical development of petroleum science and that the fraction names are operational and are related more to the general characteristics than to the identification of specific compound types. Nevertheless, once a convenient fractionation technique has been established, it is possible to compare a variety of different feedstocks varying from conventional petroleum to propane asphalt (Corbett and Petrossi, 1978). Later studies have focused not only on the composition of petroleum and its major operational fractions but on further fractionation, which allows different feedstocks to be compared on a relative basis to provide a very simple but convenient feedstock map. [Pg.128]

Feedstocks Gas ComDonents Natural Gas Light Naphtha Heavy Fuel Oil Vacuum Residual Propane Asphalt Coal... [Pg.93]

Hydrocarbon Solvents. Different feedstocks have different amounts of asphaltenes (Table I), which can influence properties. This is particularly true of different feedstocks from any one crude oil (Figure 2) in which the nonvolatile asphaltenes are concentrated in the residue or in the propane asphalt. [Pg.381]

The use of propane asphalt as a briquette binder has also been investigated propane asphalt is the propane-insoluble portion of petroleum residua (Speight, 1991). The asphalt has a lower penetration value than asphalts obtained by distillation or by oxidation. Propane asphalt has a relatively high temperature sensitivity, which may cause the briquettes to stick together. It is possible to alter the temperature sensitivity of the propane asphalt by the conventional methods of treatment that are used to alter asphalt properties for highway use (Speight, 1991,1992). [Pg.539]

In industry, the elimination of asphaltenes from oil involves using propane or butane. The utilization of a lighter paraffin results in the heavier paraffins precipitating along with the asphaltenes thereby diminishing their aromatic character. The oil removed from its asphaltene fraction is known as deasphalted oil or DAO. The precipitated portion is called asphalt. [Pg.13]

The early developments of solvent processing were concerned with the lubricating oil end of the cmde. Solvent extraction processes are appHed to many usefiil separations in the purification of gasoline, kerosene, diesel fuel, and other oils. In addition, solvent extraction can replace fractionation in many separation processes in the refinery. For example, propane deasphalting (Fig. 7) has replaced, to some extent, vacuum distillation as a means of removing asphalt from reduced cmde oils. [Pg.208]

Liquefied petroleum gases precipitate asphaltic and resinous materials from cmde residues while the lubricating oil constituents remain in solution. Although all Hquefied gases possess this property to some extent, propane and butane are used to deasphalt residual lubricating oils because of their relative low cost and their ease of separation from lubricating oils. [Pg.209]

Asphalt. This is a distillatioa residuum that can also be produced by propane deasphalting (Fig. 7) (33) and thereafter modified to meet specifications. For example, asphalt (qv) can be made softer by blending hard asphalt with the extract obtained ia the solveat treatmeat of lubricatiag oils. Oa the other hand, soft asphalts can be converted iato harder asphalts by oxidation (air blowiag). [Pg.212]

Propane is usually used in this process although propane—butane mixtures and pentane have been used with some variation in process conditions and hardness of the product. Propane deasphalting is used primarily for cmde oils of relatively low asphalt content, generally <15%. Asphalt produced from this process is normally blended with other asphaltic residua for making paving asphalt. [Pg.362]

The process (Fig. 3) is a countercurrent Hquid-Hquid extraction. The feedstock is introduced near the top of an extraction tower and the Hquid propane near the bottom, using solvent-to-oil ratios from 4 1 to 10 1. The deasphalted oil—propane solution is withdrawn overhead and the asphalt from the bottom, and each is subsequently stripped of propane. [Pg.362]

Temperature, solvent ratio, and pressure each have an effect upon the spHt point or yield of the oil and asphalt components (Table 3). Contrary to straight reduction which is a high temperature and low pressure process, propane deasphalting is a low temperature and high pressure process. [Pg.362]

Fig. 4. Comparison of propane deasphalting -with vacuum distillation of asphalt from Lagunillas, Venezuela cmde. Fig. 4. Comparison of propane deasphalting -with vacuum distillation of asphalt from Lagunillas, Venezuela cmde.
Solvent separation, using the propane deasphalting process, is another procedure by which asphalts of the straight reduced type may be manufactured. This is a physical separation process used to recover high viscosity lube fractions from a given vacuum residuum. When mixed with the residuum, the solvent preferentially dissolves the oil and precipitates the asphalt. [Pg.233]

Since the propane deasphalting operation is primarily directed toward the manufacture of lubes with asphalt as a by-product, the grades of asphalt produced from a deasphalter are usually limited. In some cases considerable blending must be done (frequently with extract oils) to provide the variety of grades required by the consumer. [Pg.233]

Liquid propane is a selective hydrocarbon solvent used to separate paraffinic constituents in lube oil base stocks from harmful asphaltic materials. It is also a refrigerant for liquefying natural gas and used for the recovery of condensable hydrocarbons from natural gas. [Pg.31]

On the other hand, liquid propane also has a high affinity for paraffinic hydrocarbons. Propane deasphalting removes asphaltic materials from heavy lube oil base stocks. These materials reduce the viscosity index of lube oils. In this process, liquid propane dissolves mainly paraffinic hydrocarbons and leaves out asphaltic materials. Higher extraction temperatures favor better separation of the asphaltic components. Deasphalted oil is stripped to recover propane, which is recycled. [Pg.53]

Code of Practice No. 4, Safe and Satisfactory Operation of Propane-Fired Bitumen Boilers, Mastic Asphalt Cauldrons/Mixers, and Hand Tools Code of Practice No. 7, Storage of Full and Empty LPG Cylinders and Cartridges Code of Practice No. 9, LPG-Air Plants Code of Practice No. 10, Recommendations for Safe Handling of LPG in Small Trailer Mounted Vessels, Skid Tanks and Small Bulk Storage Vessels Permanently Attached to Mobile Gas-fired Equipment... [Pg.307]

The use of coatings applied in the form of tape is also increasing. Polyethylene and polyvinyl chloride films, either self adhesive or else supporting films of butyl adhesive, petrolatum or butyl mastic are in use as materials applied cold at ambient temperatures. Woven glass fibre or nylon bandage is also used to support films of filled asphalt or coal tar and these are softened by propane gas torches and applied to the steel surface hot, cooling to form a thick conforming adherent layer. [Pg.658]

Bulk Plants, Distribution and Marketing Terminals store and distribute the finished products from the refineries and gas plants. Typically these facilities handle gasoline, diesel, jet fuels, asphalts, and compressed propane or butane. [Pg.15]

On this basis, petroleum may have some value in the crude state but, when refined, provides fuel gas, petrochemical gas (methane, ethane, propane, and butane), fiansportation fuel (gasoline, diesel fuel, aviation fuel), solvents, lubricants, asphalt, and many other products. In addition to the hydrocarbon constituents, petroleum does contain heteroatomic (nonhydrocarbon) species, but they are in the minority compared to the number of carbon and hydrogen atoms. They do, nevertheless, impose a major influence on the behavior of petroleum and petroleum products as well as on the refining processes (Speight and Ozum, 2002). [Pg.13]

Solvent deasphalting Treatment Absorption Remove asphalt Vacuum tower residual, propane Heavy lube oil, asphalt... [Pg.65]


See other pages where Propane asphalt is mentioned: [Pg.119]    [Pg.449]    [Pg.21]    [Pg.383]    [Pg.35]    [Pg.98]    [Pg.203]    [Pg.119]    [Pg.449]    [Pg.21]    [Pg.383]    [Pg.35]    [Pg.98]    [Pg.203]    [Pg.79]    [Pg.363]    [Pg.372]    [Pg.95]    [Pg.229]    [Pg.79]    [Pg.689]    [Pg.722]    [Pg.83]    [Pg.28]    [Pg.104]    [Pg.77]    [Pg.107]   
See also in sourсe #XX -- [ Pg.325 , Pg.381 ]




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