Pdf polymeric wax inhibitors and pour point depressants. Hence, rheological characterization of crude oils from eight major producing fields was conducted using two commercial pour point depressants ppd obtained from thermax. Pour point depressant ppd has been continuously injected into the oil production manifold handling high pour point crude to cause the formation of a sufficiently weak gel in the subsea pipeline to enable restart after a long shutin. Wetting and dispersing products these products also show a reduction in crude pour point, in spite of the fact, they were developed for a different industry. The pour point and rheological behaviour of the crude oil with these prepared. An optimized amount of go 1 wt % in nanocomposite results in improved flow characteristics of crude oil, providing a notable 18 c depression in the pour point and upto 99% reduction in its apparent viscosity down to 0. As leaders in the industry, clariant refinery services offers a broad range of pour point depressants designed to meet the customers specifications in a variety of streams and applications like transport of crudes, middle distillates including heating oil, heavy oils, waxy components and biodiesel or in marine diesel blends. Composition of pour point depressant viscosity reducer of crude oil in china. Pour point depressants ptcppd010 pour point depressant for pipeline transportation of waxy crude oil description ptppd010 is a blend of ashless organic polymers in xylene as a petroleum solvent. High pour points usually occur in crude oils that have significant paraffin content. Investigation into a pour point depressant for shengli. When an automatic instrument is used, the astm test method designation number specific to the technique shall be reported with the results.
Keeping this in view, experimental works were carried out to study the variation of rheological properties of indian waxy crude oil without or with fatty acid ester, a pour point depressant. Pdf synthesis of crude oil pourpoint depressants via. However, understanding based on wax crystal lattice parameter is still lacking to explain the microscopic interaction mechanism between wax oil and nanocomposite pour point depressant. Studies of poly ethylene acrylic acid derivatives as pour point. Advances in the research of polymeric pour point depressant for.
Optimization of pour point depressant treating rates for. Pour point depressants evonik oil additives evonik industries. Without the proper selection and treat rate of a pour point depressant, a mineral oil lubricant formulation will exhibit poor lowtemperature properties, leading, in. A newly synthesized pour point depressant ppd was used to decrease the wax deposition thickness and drag force during a waxy crude oil flow in two horizontal pipes of length 2. The dose of pour point depressants in neat waxy crude oil was varied upto 750 ppm and temperature was varied from 60oc to 40oc. The method which used to solve the problem of paraffin deposit is adding chemical additive. The paes were used as pour point depressant for crude oil from yumen oil field. The influence of nanocomposite pour point depressant on the. Research into the effects of pourpoint depressant on. The most efficient products are within the hyperbranched polyamines, such as disperbyk2150. Analysis of pour point of vegetable oils and effect of.
Crude samples were obtained from the eastern oil a, rudrasagar and western gandhar, south kadi, kosamba and ankleshwar parts of the country of which three crude oils. At present, the most popular method is adding the pour point depressant to reduce the pour point of crude oil and increase its liquidity. The objective of adding pour point depressant is to improve the fluidity of crude oil. However, the pour pointthe temperature below which crude oil becomes plastic and will not flowis important to recovery and transport and is always determined. In this paper, the prepared surfactants were evaluated as pour point depressant flow improver for waxy crude oils with different wax and asphaltene content. The crude oil in hainan fushan oilfield has the characteristics of high pour point pp and bad low temperature flow properties. Pourpoint depression of crude oils by addition of tar sand. Pdf effects of pour point depressant of evanano mmt. Us7942941b2 pour point depressant additives for oil.
Studies of poly ethylene acrylic acid derivatives as pour point depressants of waxy crude oils. Effects of pour point depressant of evanano mmt composites on changqing crude oil. General application ptppd010 improves the fluidity of very waxy crude oils so that they can be pipelined at temperature below. Preparation and evaluation of some surfactants as pour point. Impacts of viscosity, density and pour point to the wax. Pour point depressant of crude oil research india publications. Types and application of pour point depressant of crude oil. Currently, production of a condensate has started that blends with the waxy crude. Pour point analysis for the viscosity measurements of oils. Mar 01, 2011 the morphology and structure of wax crystals is one of the most important factors influencing flow properties of waxy crude oils.
Relationship between waxy crude oil composition and change in. Point depressants ppds flow improvers are used as chemical additives when transporting crude oils at temperature below their wax appearance temperature. Pour point depressant an overview sciencedirect topics. The pour point depressant ppd improves flow properties of waxy crude oil by modifying the morphology and structure of wax crystals, and this modification, i. Waxy crude oil distributes in many countries such as china. It is defined as the minimum temperature in which the oil has the ability to pour down from a beaker. Standard test method for pour point of petroleum products1. Ptppd010 improves the fluidity of very waxy crude oils so that they can be pipelined at temperature below their natural pour points and. The pour point of a liquid is the temperature below which the liquid loses its flow characteristics. Dimer and trimer form of ethanolamine were esterified with oleic acid to prepare the corresponding monoester hafiz and abdou, 2003.
Astm d97 17b standard test method for pour point of. Addition of pour point depressants to the oil to improve the extract efficiency is an effective way to prevent the generation of waxy crystalline clusters. A newstyle pour point depressant ppd for crude oil was prepared by mixing the aminated copolymer and the composite commercial ethylenevinyl acetate copolymers eva in fixed proportion. Effect of temperature and pour point depressant on the rheology of indian waxy crude oil. Paper open access research and existing problems of pour. The surface properties of these prepared surfactants were studied. Investigation into the flow assurance of waxy crude oil by. Astm d5853 17a standard test method for pour point of crude. Pour point depressants ptcppd010 pour point depressant for. Relationship between waxy crude oil composition and change. A process for reducing the pour point of a crude oil which comprises adding a pour point depressant selected from the group consisting of a raw tar sands bitumen and hydrotreated tar sands bitumen to form a blend possessing a relatively lower pour point. Preparation and evaluation of polymeric pour point depressant. The market demand for ppd has witnessed a significant rise over the past few years in the automotive industry. It was found that the ester compounds were efficient as both pour point depressants and flow improvers for the crude oil tested 51.
Ppd pour point depressant is the crude oil flow improver. Polymeric wax inhibitors and pour point depressants for waxy crude oils. There are a range of manual and automatic industryadopted methods that are used to measure the pour point of an oil, which are upheld and approved by the international standards organisation, astm international. A procedure for testing the pour point of crude oils is described in test method d5853. For measuring the pour point of petroleumbased oils, the standard tests are astm d97 and astm d5949. There have been some investigations into how the oil composition affects the effectiveness of ppd. The compatibility of these additives with either com. The effects of ppd on wats, abnormal points, pour points, rheological properties and waxcrystal morphology were studied in detail in this paper. A wide variety of crude oil pour point depressant options are available to you, such as application. In crude oil, a high pour point is generally associated with a high paraffin content, typically found in crude deriving from a larger proportion of plant material astm standard d5949, 2003. In the further study, the effect of the concentration on the pour point was investigated. Pour point depressant market size, share industry growth.
Pour point depressant, pour point,heattreatment temperature,fushan crude oil abstract. Pdf research and existing problems of pour point depressant. As a result, the wax crystals become more compact with less liquid oil in the threedimension structure. Global pour point depressant ppd market is predicted to register a cagr of 3.
To reduce the operating cost during production of waxy crude oil and for lowering the energy consumption and ensuring safety and cost effectiveness in pipeline. The efficiency of these copolymers as pour point depressants is quite good as there is a reduction of the pour point temperature from 27 to 6c, depending on the composition and the location of the crude oil tested. Development and property evaluation of fj2 crude oil pour. The products were evaluated as pour point depressant and flow improver on the akholjuni crude oil gujarat, india. The pourpoint depressant ppd improves flow properties of waxy crude oil by modifying the morphology and structure of wax crystals, and this modification, i.
Chemical additives are improved by reducing the freezing point of crude oil, reducing the viscosity of crude oil and reducing the flow resistance. Active, expires 20260320 application number us11547,349 other versions us20070161519a1. Synthesis of crude oil pour point depressants via polycondensation of cashew nut shell liquids. According to the table 2, the highest pour point is dulang and the lowest pour point is tapis. May 30, 2019 pour point depressant are widely used for improving the low temperature fluidity of crude oil along with preventing the generation of waxy crystalline clusters. Pdf paraffin precipitation during pipeline transport of waxy crude oils gives rise to several challenges, including wax deposition, flow reduction. Pour point depressants ptcppd010 pour point depressant. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.
Effect of pour point depressant on wax deposition and drag. Use of novel pour point depressant synthesized from vegetable. Based on the analysis of fushan crude oil physical. Crude and fuel handling today as leaders in the industry, clariant refinery services offers a broad range of pour point depressants designed to meet the customers specifications in a variety of streams and applications like transport of crudes, middle distillates including heating oil, heavy oils, waxy components and biodiesel or in marine diesel blends. Effects of pourpoint depressants on indian crude oils. The main components of pour point depressant viscosity reducer include ethyleneacrylate copolymer, ethylenevinyl acetatesodium allylsulfonate copolymer, vinyl acetateacrylate maleic anhydride. Hexatriethanolamine oleate esters as pour point depressant. Research and existing problems of pour point depressantviscosity. The effect of pour point depressant varies widely with respect to the oil but they are most effective with thinner oils such as sae 10, sae 20, and sae 30 grades. The aminated copolymer was synthesized by amination of terpolymer copolymerized with monomers octadecyl acrylate, maleic anhydride, and vinyl acetate. This research can be the basis for designing or selecting a molecule for use as a pour point depressant in accordance with the characteristics of crude oil, particularly since each source of crude.
910 140 1121 702 1095 956 420 934 987 217 1090 1477 574 149 556 37 210 745 1348 755 422 1345 1467 1422 1361 1457 965 84 55 395 939 1477 1245 1031 1242 392