54results about How to "High anti-scaling efficiency" patented technology

The invention discloses a method for synthesizing a polyepoxysuecinic acid salt, which is characterized by comprising the following steps of: dissolving maleic anhydride in deionized water; adding a solution of sodium hydroxide at 30 to 60 DEG C with stirring; adding sodium tungstate and hydrogen peroxide when the temperature is controlled to be between 60 to 100 DEG C; adjusting the pH value to 5 to 7 for reaction for 2 to 100 hours; cooling the reaction solution to below 20 DEG C; adding a precipitator, mixing and stirring the precipitator and the solution; performing suction filtration, adding water into filtrate obtained after suction filtration; keeping the pH value between 6 and 7; heating the filtrate added with water to 70 to 100 DEG C to obtain an epoxysuecinic acid salt; preparing a 0.2 to 4.0 mol / L aqueous solution of the epoxysuecinic acid salt; adding calcium hydroxide and a polymerization promoter into the aqueous solution for performing polymerization reaction till liquid turns yellowish and pasty; and cooling the yellowish and pasty liquid to room temperature to obtain the polyepoxysuccinic acid salt. The method has the advantages of good product quality, low raw material cost and product scale inhibition performance advantageous over that of the prior art.

A scale inhibitor for oil refining equipment, which is composed of 60-94% of polyalkenyl succinimide alkylphenol aldehyde condensate, 1-15% of metal deactivator, and 5-25% of detergent Made, the amount of organic solvent is 20% of the total weight of the above three components. The present invention is evaluated by a laboratory, and it is proved that it has the advantages of high scale inhibition efficiency, delaying coking and scaling of equipment, and the scale inhibition rate can reach more than 80% when the filling amount is 100 μg / g. It can be used to suppress and slow down the coking and fouling of various equipment in petroleum refining and petrochemical processes, especially for the coking and fouling of hydrogenation process equipment, such as gasoline hydrofinishing, diesel hydrofinishing, distillate oil hydrocracking, etc. Raw oil heat exchangers, reactors, heating furnaces and other equipment in the process can also be used to inhibit and slow down the coking of heat exchangers, steam generators, oil transfer lines and other equipment in catalytic cracking, delayed coking, crude oil distillation and other processes Fouling, so that various devices can maintain long-term safe operation.

The invention provides a scale and corrosion inhibitor for oil field systems, which belongs to the technical field of water treatment, and its ingredients are composed of 15-30% of high molecular weight polymaleic anhydride, 5-10% of polyepoxy succinic acid, and zinc sulfate 6~9%, sodium diethyldithiocarbamate 5~10%, thiourea 5~10%, disodium edetate 1~5% and the rest water. The invention provides an efficient, phosphorus-free and environmentally friendly scale and corrosion inhibitor for oil field systems, especially suitable for oil field systems with high alkalinity, high salinity, high chloride radicals, and serious silicate scale. The components have good compatibility, synergy and complementarity, and the scale inhibition rate can be as high as 99.9%, and the corrosion inhibition rate can be as high as 98.5%.

The invention discloses an anti-scaling device, which comprises a pair of flange plates, an outer shell, an inner shell, an ultrasonic generator and a permanent magnet. A pair of flanges are respectively sleeved on both ends of the housing for connection with industrial water pipes. The two ends of the outer shell and the two ends of the inner shell are respectively fixed together to form an annular airtight space. The ultrasonic generator and the permanent magnet are arranged in the annular airtight space, and the ultrasonic generator is connected with the power supply through wires. One end of the inner shell is a water inlet, and the other end is a water outlet. The present invention solves the problem of complex structure, complex installation process, and low scale inhibition efficiency in the prior art, and most of them are used for industrial water equipment without scale inhibition from industrial water pipelines. The problem of high cost.

The invention relates to a film scale inhibitor and a preparation method thereof. The film scale inhibitor comprises components in percentage by weight as follows: 22%-42% of 2-phosphomobutane-1, 2, 4-tricarboxylic acid, 10%-15% of polyaspartic acid, 10%-15% of polyacrylic acid, 5%-10% of hydrolyzed polymaleic anhydride and the balance of purified water, and the sum of the components is 100%. According to the preparation method, 2- phosphomobutane-1, 2, 4- tricarboxylic acid, polyaspartic acid, polyacrylic acid, hydrolyzed polymaleic anhydride and purified water are sequentially added into the reaction kettle with normal pressure and temperature and are stirred. The film scale inhibitor and the preparation method have the benefits as follows: the scale inhibitor has better stability on calcium ion concentration, basicity, metal ions of iron, manganese and the like, and formation of scales such as CaCO3, CaSO1, BaSO1, SrSO1, CaF2 and the like can be effectively controlled; and 2), the price is cheap, the scale inhibiting efficiency is high, the adding quantity is small, environmental protection is realized, the property is stable, and the storage period is long.