Product name : THPS Biocide
Item : Biocide THPS
Type : Oilfield Biocides
CAS : 55566-30-8
Application : Biocides, Microbial Control
Similar to : Aqucar THPS 75
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Packages : 200L, 1000L
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THPS biocide is a kind of environmental-friendly water treatment microbiocide which is made of tetrakis(hydroxymethyl)phosphonium sulfate (THPS 75%) solution. It can withhold sulfate reducing bacteria (SRB), most of aerobic bacteria including microorganisms that form biofilm in enhanced oil recovery process, production and other supporting systems such as water injection equipments, well water disposal facilities, water holding tanks, recirculating water treatment systems and pipelines. THPS biocide is also effective in controlling microbial growth in drilling muds and stimulation fluids for oil and gas wells. Tetrakis(hydroxymethyl)phosphonium sulfate is characterized by its low solidity point and good stability. THPS 75% solution can easily dissolve in water and can be preserved for a long time. In 1995, the US EPA ratified it with zero toxicity and awarded it with US Green Chemical prize due to its properties of high efficacy, low toxicity and low rudimental. Bichain is one of reliable THPS biocide manufacturers and suppliers of THPS 75, Tetrakis(hydroxymethyl)phosphonium sulfate, THPS 75% solution for oilfield water treatment. We supply highqulity THPS biocide products like Aqucar THPS 75 with CAS 55566-30-8.
Molecular weight:  406.27
Molecular Formula: C8H24O12P2S
Structural Formula:
THPS biocide formula
Technical Data:
THPS Biocide spec
Package and Storage
Package: 200L plastic drum, IBC (1000L) or customers’ requirement. Store in dry cool and ventilation environment.
Shelf time: 1 years
Recommended Dosage
Water Flooding
THPS biocide should be added to a water flood system at a point where uniform mixing will occur. First step: add 93 -350 ppm THPS for a noticeably fouled system, when added to a flowing system, slug dose for 2 -6 hours based on flow rates. Repeat as necessary until control is achieved. Second step: Once control has been achieved, add 14 -98 ppm THPS biocide weekly or as needed to maintain control. As for continuous treatment, THPS can be dosed continuously at a level of 14 -67 ppm.
Oil and Gas Production and Transmission Systems and Pipeline
THPS 75% solution should be added at a point in the pipeline where uniform mixing will occur. The application should be conducted to ensure maximum distribution of product through the internal surface of the pipeline by adding an amount of biocide which eventually comes out the other end of the pipeline. Criteria for success of the treatment will be reduction in bacterial count and/or corrosion rates. Adding step is same as that of water flooding. As for continuous treatment, THPS can be dosed continuously at a level of 14 -100 ppm.
Drilling Muds, Well Completion and Workover Fluids
THPS biocide should be added to these fluids at a point where uniform mixing will occur. Add 33-1400 ppm of product to a freshly prepared fluid depending on severity of contamination.
Gas Storage Well systems
Individual injection wells should be treated with THPS 75 at the same dosage and same steps as described under water flooding. Injections should be repeated as needed to maintain control. Individual drips should be treated with a sufficient quantity of product to produce a concentration of 33.3 -133.3 ppm when diluted by the water present in the drip. Injections should be repeated as needed to maintain control. Some oilfield drilling service companies in US and Canada started to use Xanthan Gum, THPS Biocide and Curdlan Gum in water flooding process. Here is a course drafted by Dr Georgy Zerkalov from Stanford University.

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