72results about How to "Dense floc" patented technology

The invention relates to a polymer emulsion for polymer-containing sewage treatment, which is used for processing oil field sewage and a preparation method thereof. The polymer emulsion can have strong adsorptive capacity on colloidal particles and oil droplets in sewage so that the oil droplets are inverted and rapidly copolymerized. Acrylamide and acryloyloxy ethyl trimethyl ammonium chloride are adopted as cationic monomers, fatty alcohol-polyoxyethylene ethers MOA-3 and MOA-9 are adopted as emulsifying agents, tasteless kerosene is adopted as a continuous phase, water is adopted as a dispersed phase and 2,2'-azodissobutyl amidinodihydrochloride is adopted as an initiating agent; and the solid content of the obtained emulsion is 40-50 percent, the cationic degree of a polymer is 50-70 percent, and the characteristic viscosity number of the polymer is 1,026-1,378ml / g. The preparation method comprises the steps of: adding the raw materials into a reactor and stirring to form emulsion; and raising the temperature and introducing nitrogen for removing oxygen, and adding the initiating agent to react at constant temperature for five hours to obtain the polymer emulsion. The emulsionfor treating polymer-containing sewage has the advantages of less medicament dosage, high oil and water separating speed, compact flocculating body, obvious water purifying effect, and the like, and can be used for treating the polymer-containing sewage of an oil field.

The invention relates to a composite iron salt coagulating agent, which is prepared from the following components in parts by weight: 100 parts of iron-containing waste hydrochloric acid, 10 to 30 parts of aluminum-containing sludge, 1 to 5 parts of silicic acid and 0.4 to 2 parts of sodium chlorate. A preparation method comprises the following steps of adding the iron-containing waste hydrochloric acid into a reaction kettle, adding the sodium chlorate into the reaction kettle, and agitating an obtained mixture for reaction; adding the aluminum-containing sludge into the reaction kettle, and agitating a newly obtained mixture for reaction; dropwise adding the silicic acid into the reaction kettle, and agitating a finally obtained mixture for reaction, to obtain the composite iron salt coagulating agent. The composite iron salt coagulating agent has the beneficial effects that (1), the composite coagulating agent is simple in preparation process, wide in sources of raw materials and low in cost; (2), the product performance is stable, the dosage of an agent is less, and a flocculating constituent is compact and is further quick in sedimentation rate; (3), the composite iron salt coagulating agent has favorable decoloration performance and a higher COD (Chemical Oxygen Demand) removal rate, and is wider in pH (potential of hydrogen) serviceable range.