The Preparation Of Green Scale Inhibitors And Scale Inhibition Performance Study

With the rapid development of industry, the problem of industrial water corrosion and scaling is urgent to be solved. Serious damages to the corrosion and scaling in industrial production, block the development of the industry. Scale inhibitor is one of the main ways to solve the scaling, the present scale inhibitors are mainly inorganic polypHospHate, corrosion scale inhibitor containing organic pHospHorus, the natural scale inhibitors, etc. Although these pHospHorous scale inhibitor has the certain scale effect, but also caused certain pollution to the environment, do not accord with the requirement of green environmental protection and sustainable development. With the posing of the conception of green chemistry, people for the pursuit of better green chemicals, green scale inhibitor research and development has become the important topic of research at home and abroad. Poly (aspartic acid) and poly (ethylene succinate is in recent years, research and development of two new scale inhibitor, non-toxic, non-polluting, easy biodegradation, accord with the requirement of green environmental protection, new high polymer material is green.Their use is very wide, involved in industrial water treatment, pHarmaceutical, agricultural, biological and other various industries.Poly (aspartic acid) and poly (ethylene succinate on calcium carbonate scale, calcium sulpHate scale, such as barium sulfate scale has good scale inhibition effect, has become the focus of the 21st century at home and abroad to study. Respectively in this paper the preparation of poly (aspartic acid was synthesized with poly (ethylene succinate and scale inhibition performance was studied, the concrete research content and the experimental results are as follows:The first part of this article first briefly describes the definition of scale inhibitor, scale inhibitor is introduced, principle of scale inhibition and scale inhibition performance evaluation method.And then focus on two kinds of green scale inhibitors poly (aspartic acid and the preparation methods and applications of poly (ethylene succinate.On the current status of the domestic scale inhibitor research direction was prospected.In this paper, the second part with maleic anhydride and urea as raw materials, pHospHoric acid as the catalyst, two steps synthesis of poly (aspartic acid.Of PASP using Fourier infrared spectrum characterization, through the experiment investigated the reaction conditions on the scale inhibition rate and the effect of poly (aspartic acid and discusses the optimum process conditions for synthesis of poly (aspartic acid, including maleic acid and the molar ratio of urea, polymerization temperature, polymerization time, such as experiment under the condition of the process proceeds of PASP anti-scaling effect is best.Of PASP biodegradation performance tests, it is concluded that PASP for easy biodegradable scale inhibitor.This article third part with maleic anhydride as the main raw material, using sodium tungstate as catalyst, the hydrated calcium sulfate and calcium hydroxide as the dual initiator, without nitrogen, pHospHorus and synthetic biodegradable green scale inhibitor with good sex of poly (ethylene succinate (it).Analyzed various kinds of synthetic conditions on the scale inhibition performance impact, it obtained the optimum technological conditions for synthesis of it.The static anti-scaling method to investigate the resistance of the calcium carbonate scale performance, the results showed that product in the circulating cooling water system has excellent scale inhibition performance.In this paper, the fourth part to load catalyst sodium tungstate, mesoporous molecular sieve catalytic synthesis of epoxy succinic acid, the product by high performance liquid chromatograpHy (HPLC) to test its yield could reach more than 95%.Then to cause epoxy composite initiator succinate polymerization are envronmentally friendly water treatment agent polyethylene succinic acid (salt) (it) solution, and in accordance with national standards to give evaluation to the synthesis of water treatment agent.Examines the system pH value, reaction temperature, dosage of initiator on poly (ethylene succinate (salt) the influence of scale inhibitor performance.And its pHysiology and biodegradability test was carried out.In this paper, the fifth part with maleic anhydride as raw material, sodium tungstate as catalyst, the preparation of epoxy succinate (ESA).With the 2 a acrylamide,2 methyl propyl sulfonic acid (AMPS) copolymer get ESA/AMPS copolymer.The static experimental method evaluation the performance of copolymer scale resistance calcium pHospHate and calcium carbonate scale, discusses the ratio of monomer, dosage of initiator, polymerization time, polymerization temperature, and the mass of scale inhibitors for calcium carbonate and calcium pHospHate scale inhibition rate and the effect of and to the discussion of the results.