The application mechanism of Tetrakis hydroxymethyl phosphonium sulfate (THPS)

The application mechanism of Tetrakis hydroxymethyl phosphonium sulfate (THPS) CAS:55566-30-8 in oilfield and water treatment is relatively complex, involving sterilization, corrosion inhibition, environmental friendliness and other aspects. Here is a more detailed explanation:

1. Bactericidal action mechanism

THPS is an efficient, broad-spectrum fungicide that kills microorganisms mainly by the following mechanisms:

(1) Disruption the cell membrane

-THPS molecules are positively charged and are able to bind to negatively charged phospholipids and proteins on the microbial cell membrane, disrupting the integrity of the cell membrane.

-After the damaged cell membrane, the cell contents (such as proteins, nucleic acids, ions, etc.) leak out, leading to cell death.

-This effect is effective against bacteria, fungi and algae.

(2) Inhibition of the enzyme activity

-THPS can bind to key enzymes (such as dehydrogenase, ATP enzyme, etc.) in the microorganism to inhibit its activity.

-Inactivation of enzymes can interfere with the microbial energy metabolism and biosynthetic process, leading to the inhibition or even death of microbial growth.

-In particular, it strongly suppresses the enzyme system of sulfate-reducing bacteria (SRB), thus effectively preventing the corrosion problems caused by SRB.

(3) Interference with DNA and RNA synthesis

-THPS is able to penetrate into microbial cells and bind to DNA and RNA, interfering with its replication and transcription processes.

-This effect further inhibits microbial growth and reproduction.

(4) Broad-spectrum sterilization

-THPS is effective against a variety of microorganisms, including Gram-positive, Gram-negative, fungi, algae, and sulfate-reducing bacteria (SRB).

-In oil fields, THPS is particularly suitable for controlling the SRB to prevent the production of hydrogen sulfide (H2S), thus reducing hydrogen sulfide-induced corrosion and environmental pollution.

2. Mechanism of corrosion inhibition

THPS is not only bactericidal, but also has certain corrosion inhibition properties, mainly through the following mechanisms:

(1) Metal surface film formation

-THPS can form a dense protective film on the metal surface to isolate the direct contact between the corrosive media (such as oxygen, water, hydrogen sulfide, etc.) and the metal.

-This protective film can effectively slow down the corrosion rate of the metal.

(2) Chelate the metal ions

-The phosphorus and hydroxyl groups in THPS molecules can form stable chelates with metal ions in water (such as Fe², Ca ², Mg², etc.).

-By chelation, THPS can prevent metal ions from participating in the corrosion reaction, thus reducing the corrosion rate.

(3) Inhibit the electrochemical corrosion

-THPS can adsorb on the metal surface, change the electrochemical properties of the metal surface, and inhibit the anode and cathodic reactions, thus slowing down the electrochemical corrosion process.

3. Environmental friendliness

THPS performs better in the environment than in many traditional fungicides, mainly in the following aspects:

(1) Degradability

-THPS can rapidly degrade in the environment into non-toxic or low-toxic substances (such as carbon dioxide, water, phosphate, etc.), and will not remain in the environment forever.

-Its degradation products have less effect on the ecological environment.

(2) Low toxicity

-THPS has less toxicity to mammals and less harm to operators during use.

-THPS has higher safety than traditional fungicides (such as formaldehyde, glutaraldehyde, etc.).

(3) No bioaccumulation

-THPS does not accumulate within the organism, and thus has less long-term effects on aquatic organisms and ecosystems.

4. Application in oil fields

In the oil field, THPS is mainly used in the following scenarios:

(1) Control of microbial corrosion

-Sulfate-reducing bacteria (SRB) are easy to breed in oilfield water injection systems and oil Wells, and SRB will produce hydrogen sulfide (H2S), leading to serious corrosion problems.

-THPS can effectively kill SRB and prevent the generation of hydrogen sulfide, thus reducing corrosion.

(2) Prevent biofilm formation

-Biofilm formed by microorganisms on the surface of pipes and equipment can cause blockage and corrosion.

-THPS is able to permeate the biofilm, kill the microorganisms in it, and prevent the formation and accumulation of the biofilm.

(3) Improve the water injection efficiency

-In the water injection system, THPS can kill the microorganisms in the water and prevent the microorganisms from blocking the formation pores, thus improving the water injection efficiency.

5. Application in water treatment

In the field of water treatment, THPS is mainly used in the following scenarios:

(1) Industrial circulating water system

-Industrial circulating water systems are prone to breed bacteria, algae and fungi, leading to equipment corrosion and reduced efficiency.

-THPS can effectively control the growth of microorganisms and keep the system clean and operate efficiently.

(2) Cooling water system

-The breeding of microorganisms in cooling water systems can cause problems with biofilm formation and corrosion.

-THPS is able to kill microorganisms and inhibit biofilm formation and prolong the service life of the device.

(3) Sewage treatment

-In sewage treatment, THPS can be used to control the microbial activity in sludge, prevent sludge swelling and odor generation.

6. Advantages of Tetrakis hydroxymethyl phosphonium sulfate (THPS)

THPS has the following advantages over conventional fungicides:

-High efficiency: a good bactericidal effect can be achieved at a low concentration.

-Wide spectrum: effective for a variety of microorganisms, especially for SRB.

-Environment friendly: easy degradation, low toxicity, no bioaccumulation.

-Compatibility: good compatibility with other water-treated chemicals (such as corrosion inhibitor, scale inhibitor).

Sum up

Tetrakis hydroxymethyl phosphonium sulfate (THPS) CAS: 55566-30-8 achieves efficient sterilization by destroying cell membrane, inhibiting enzyme activity, interfering with DNA / RNA synthesis and other mechanisms, and plays corrosion inhibition through film formation, chelation and inhibition of electrochemical corrosion. It is widely used in oil field and water treatment, and can effectively control microbial corrosion, prevent biofilm formation, and is environmentally friendly.