Chongqing University

Shouxin, in collaboration with Chongqing University through a university-enterprise cooperation, has jointly developed a synthesis method for a cationic polyacrylamide water treatment agent. The process comprises the following steps: (1) Preparing an aqueous mixed solution of acrylamide monomer and cationic monomer, wherein the total mass fraction of the monomers is 25–35%, and the mass ratio of cationic monomer to acrylamide monomer is between 1:5 and 2:5; (2) Adding urea and H₂O₂ to the mixed solution, adjusting the pH to 4–6, and then initiating polymerization under nitrogen protection using UV/H₂O₂ initiation; (3) After polymerization, allowing the product to stand and mature, resulting in the final cationic polyacrylamide water treatment agent. The cationic polyacrylamide produced via this patented technology exhibits high molecular weight, cost-effective and readily available initiators, short polymerization time, minimal auxiliary additives, and eliminates the need for temperature control—making the process energy-efficient, environmentally friendly, highly stable, and efficient. As a core achievement of this collaboration, the technology demonstrates significant advancedness and practical applicability, reflecting a high level of technological innovation and application value. Product series developed based on this patented technology have received strong market recognition, leading to a substantial increase in sales.

South China University of Technology

Shouxin has deeply collaborated with South China University of Technology to successfully develop a method for preparing cationic polyacrylamide emulsion via aqueous dispersion polymerization. The synthesis process involves dissolving non-ionic monomers, cationic monomers, dispersion stabilizers, partial inorganic salts, and additives in deionized water to form a homogeneous system under stirring in a constant-temperature water bath at 40–70°C, while nitrogen is introduced to remove oxygen. Initially, 50–80% of the total initiator mass is added, and the reaction continues for 3–6 hours. The remaining initiator is then introduced for further reaction, followed by the addition of the remaining inorganic salts. After continued stirring, the cationic polyacrylamide emulsion is obtained. A novel redox initiator system is employed in the process, using graphene oxide as the reducing agent and persulfate as the oxidizing agent, enabling the preparation of the emulsion through aqueous dispersion polymerization. The developed emulsion offers rapid dissolution, high molecular weight, excellent fluidity and stability, minimal use of organic solvents during polymerization, environmental friendliness, non-toxicity, and the ability to adsorb trace heavy metal ions. This collaboration fully leverages the strengths of both parties: South China University of Technology contributes strong R&D capabilities and technical support, while Shouxin provides industrial expertise and market resources. By establishing a joint university-enterprise R&D platform, we have successfully bridged the innovation chain from laboratory research to market application.

Chongqing Technology and Business University

Shouxin has engaged in an in-depth collaboration with Chongqing Technology and Business University to achieve continuous advancements in water treatment technology. In response to the limitations of current flocculant technology, the partners have successfully developed a method for synthesizing highly efficient flocculants through hydrolysis optimization. The process uses acrylamide and [2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide (SPE) as raw materials. These are dissolved in distilled water at a defined ratio and stirred until fully dissolved. The photoinitiator VA-044 is then added, and oxygen is removed by purging with nitrogen. After sealing, the reactor is subjected to ultraviolet light to initiate a photoreaction, yielding the pre-product AM-g-SPE. A quantity of AM-g-SPE is dissolved in water under moderate heating, followed by the addition of a 1 mol/L sodium hydroxide solution. The mixture is placed in a constant-temperature water bath at 70–80°C, aged at room temperature, washed with an excess of acetone to precipitate the product, which is then crushed and dried to obtain the hydrolyzed flocculant Hyd.AM-g-SPE. This technology offers stable reaction performance, simple operation, and easy control. The resulting high-efficiency flocculant exhibits excellent stability, rapid dissolution, and high conversion rates, making it suitable for a wide range of industrial wastewater treatment applications. Product series derived from this research have gained significant market recognition, contributing to a substantial increase in sales.

Anhui University of Technology

Shouxin has once again joined forces with Anhui University of Technology to achieve breakthrough innovations in the field of environmental water treatment technology. Together, they have successfully developed a method for preparing a magnetic hydrophobic modified cationic polyacrylamide oil-removing flocculant. The process involves dissolving dodecyl glucoside (or cocamide diethanolamine), diallyl dimethyl ammonium chloride, acrylamide, and a photoinitiator in water. The pH is adjusted, and the reaction flask is purged with nitrogen and sealed. It is then subjected to photopolymerization under a low-pressure ultraviolet lamp, resulting in a milky colloid intermediate. This intermediate is redissolved in ultrapure water, followed by the addition of magnetic nano-Fe₃O₄ particles and ammonium persulfate under stirring. The final product is obtained through washing, drying, and grinding as a black powdered oil-removal flocculant. This technology offers short polymerization time, low reaction temperature, and eliminates the need for cooling condensation, significantly reducing energy consumption while ensuring high stability. The incorporation of hydrophobic monomers reduces the hydrophilicity of the flocculant, enhances its adsorption capacity for oily substances, and strengthens its demulsification ability. The embedded magnetic nano-Fe₃O₄ particles enable rapid sedimentation and easy separation under an external magnetic field. This collaboration addresses the urgent need for effective treatment of oily wastewater, particularly the removal of emulsified oils, which represents a major challenge in the field. The successful development of this technology underscores the continuous breakthroughs and technological innovations achieved by both parties in environmental water treatment.