Used in wastewater treatment agent according to the pharmaceutical use, can be divided into organic phosphine series solid corrosion inhibitor, organic phosphine series liquid corrosion inhibitor, organic phosphonate liquid series, poly carboxylic acid scale inhibitor and bactericidal algicide, slime stripping agent, special composite corrosion inhibitor, pre cleaning the film agent, copper and pickling inhibitor, flocculant.
The main types of organic phosphine solid corrosion inhibitors:
ATMP, used in the circulating cooling water of thermal power plants, oil refineries, oil field water injection system. Can play a role in reducing corrosion and scaling of metal equipment or piping. ATMP is used as a metal ion chelating agent in textile printing and dyeing industry, and can also be used as metal surface treatment agent. ATMP solid crystal, easy to dissolve in water, easy to absorb moisture, easy to transport and use, especially suitable for cold winter areas. Because of its high purity, it can be used as metal chelating agent and metal surface treatment agent in textile printing and dyeing industry.
HEDP two is a kind of organic phosphoric acid scale inhibitor, which can form stable complex with many kinds of metal ions, such as iron, copper and zinc. Acid and alkali resistance, chlorine oxidation resistance is better than other organic phosphoric acid (salt). HEDP can react with metal ions, especially calcium chelate ring six is formed, so HEDP has better scale inhibition and visiblethreshold effects, when used with other water treatment agent, showed good synergistic effects. The HEDP solid belongs to the high purity product, and is suitable for the severe cold area in winter.
Edtmps EDTMPS is nitrogenous organic polybasic phosphonic acid, a cathodic inhibitor, compared with inorganic phosphate, corrosion rate is 3~5 times higher. The utility model can be mixed with water, has no toxicity, no pollution, good chemical stability and thermal resistance, and has good scale inhibition effect at 200 DEG C. EDTMPS can dissociate into 8 positive and negative ions in aqueous solution, thus can chelate with many metal ions to form a plurality of single polymer reticulation complex, loosely dispersed in water, destroy the normal crystallization of calcium scale. The scale inhibition effect of EDTMPS on calcium sulfate and barium sulfate is good.
Two three five ethylene amine methylene phosphonic acid DTPMPA in water treatment for circulating cooling water and boiler water scale and corrosion inhibitor, especially suitable for alkaline cooling water as scale without the adjustment of pH corrosion inhibitor, scale resistance and can be used for containing barium carbonate of high water injection and cooling water, boiler water corrosion inhibitor; when used alone in medicine, without adding dispersant, deposition volume is still small. DTPMPA can also be used as peroxide stabilizer, chelating agent for textile printing and dyeing, pigment dispersant, oxygen delignification stabilizer, trace element carrier in chemical fertilizer and concrete additive. In addition, it has been widely used in papermaking, electroplating, metal pickling and cosmetics. Stabilizer for oxidizing bactericide.
2- phosphonic acid butane -1, 2, 4- carboxylic acid PBTCA, the most widely used in high-performance scale inhibitor, is one of the best performance of the product, but also a good stabilizer of zinc salts. Corrosion inhibitor is widely used in the circulating cooling water system and oil injection system, especially suitable for use with zinc salt and copolymer compound can be used for high temperature, high hardness, high alkali and high concentration multiple running situations, PBTCA can be used as chelating agent and metal detergent in the washing industry.
Polyol phosphate PAPE, is a new type of water treatment agent, has good scale and corrosion inhibition. Due to a number of polyoxyethylene introduced molecules, not only improve the corrosion performance, but also improve the dispersion ability of inhibition of calcium scale and sediment. Have a good inhibitory effect of inhibitor of the existing domestic water beyond the control of barium strontium deposit of calcium carbonate in water, insoluble calcium sulfate salt deposition also plays the role of fine scale, on steel with cathodic protection, corrosion better than similar domestic products available. The polyol phosphate ester was well mixed with polycarboxylate, organic phosphonate, inorganic phosphate and zinc salt. Polyhydric alcohol phosphate inhibitor for oilfield water injection collected (especially recommended as Nalco Visco 953, substitutes) industrial cooling water treatment corrosion inhibitor.
2- hydroxy phosphonoacetic acid HPAA, good chemical stability, easy hydrolysis, not easy to be damaged by acid, the use of safe and reliable, non-toxic and pollution-free, HPAA can improve the solubility of zinc, with strong inhibition, HPAA inhibition performance than HEDP, EDTMP is 5~8 times higher. HPAA with low molecular weight polymer is composed of organic corrosion inhibitor.
Double 1 6-, three sub hexyl amine five methylene phosphonic acid BHMTPMPA is a high-efficient chelating scale inhibitor, has good inhibiting effect to carbonate and sulfate scale. Corrosion and scale inhibitor used as oil field water treatment, scale and corrosion inhibitor for industrial circulating cooling water and boiler water.
POCA is a copolymer of phosphono carboxylic acid, phosphonic acid groups were introduced in the original carboxylic acid, calcium carbonate, calcium phosphate scale in circulating cooling water has good dispersing performance, and deposition of barium sulfate and strontium sulfate scale and silicon has a good inhibitory effect; POCA and other organic phosphonic acid salt and copolymer with compound synergistic effect. POCA has a wide range of water quality, good chemical stability, chlorine oxidation resistance and so on. POCA is mainly used to scale water injection system to industrial circulating cooling water system, oil and corrosion.
The main types of scale inhibitor of organic phosphine liquid:
Amino acid ATMP,