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Sulfonated Asphalt Powder

Sulfonated Asphalt Powder

Basic Information

CAS No.: 68201-32-1
Sulfonated bitumen powder is an organic treatment agent used in oil drilling fluids to prevent shale collapse by inhibiting shale hydration and dispersion. Its main component is sulfonated bitumen, which is made from petroleum bitumen through sulfonation, emulsification, and other processes. It appears as brown flakes or powder.

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Product Details


Basic Information

Product NameSulfonated Asphalt Powder
Main CompositionAnionic water-soluble modified product by asphalt sulfonation
Main FunctionsWellbore anti-collapse, fluid loss control, formation plugging, lubrication
Temperature ResistanceUp to 180℃
Applicable SystemAll kinds of water-based drilling fluids
CAS RemarkIndustrial compound mixture, no exclusive single CAS number


Physical and Chemical Properties

AppearanceDark brown free-flowing powder
Moisture Content≤8.0%
Water Soluble Matter≥70.0%
pH Value (1% aqueous solution)7.0 ~ 9.0
Fineness (60-mesh pass rate)≥95%
SolubilityEasily soluble in alkaline water, soluble in fresh water
Thermal StabilityGood high-temperature stability


Core Performance and Chemical Characteristics

Wellbore StabilizationAdsorb on shale surface to form protective film, inhibit hydration expansion
Fluid Loss ReductionFill mud cake pores to optimize mud cake and reduce filtration loss
Formation PluggingBlock formation micro-fractures and prevent leakage
Lubricating PropertyReduce friction resistance and drilling torque
Salt & Calcium ResistanceStable performance in high salinity drilling fluid
Good CompatibilityCompatible with most polymer drilling fluid additives


Safety Information

ToxicityLow toxicity
Health HazardDust may cause slight irritation to respiratory tract and eyes
Protective MeasuresWear dust-proof mask, gloves and safety goggles
Storage ConditionSeal and store in cool dry place, keep away from open fire
TransportationOrdinary industrial chemicals, avoid dampness
First AidRinse skin and eyes with plenty of clean water
Waste DisposalDispose in accordance with local environmental standards


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