5 results about "Methylisothiazolinone" patented technology

This invention relates to the field of oilfield chemical technology, specifically to a salt-resistant thickener for fracturing and its preparation process, comprising the following raw materials: multifunctional salt-resistant modified guar gum, organoboron crosslinking agent, potassium chloride, alkyl glycoside, sodium carbonate, methylisothiazolinone, and deionized water. In this invention, the multifunctional salt-resistant modified guar gum forms hydroxyl active sites through alkaline activation, introduces sulfonic acid groups, and grafts cationic monomers onto the guar gum backbone. The sulfonic acid groups enhance the hydration capacity and resistance to electrolyte interference of the molecular chain, maintaining the extension of the molecular chain. The introduction of appropriate cationic groups can improve the conformation of the molecular chain to a certain extent, avoiding increased charge shielding effect that leads to molecular chain contraction. This allows the fracturing fluid to maintain superior solubility and stable viscosity in high-salt, high-hardness formation water environments, enhancing its salt resistance and hard water resistance.

This invention discloses a perming composition based on thermosensitive regulation, comprising the following components: an aqueous phase including disodium EDTA, urea, glycerin, methylparaben, propylparaben, and phenoxyethanol; a reducing buffer phase including cysteine ​​hydrochloride, cysteine, sodium bicarbonate, ammonium carbonate, and ammonia; an emulsified oil phase including caprylic / capric triglyceride, polydimethylsiloxane, sodium lauroyl glutamate, cocamidopropyl betaine, and PEG-40 hydrogenated castor oil; an active repair phase including phosphatidylcholine, hydrogenated lecithin, ceramide, tocopherol, ascorbyl palmitate, ethoxydiethylene glycol, p-hydroxyacetophenone, and 1,2-hexanediol; a conditioning and repair phase including hydrolyzed keratin, arginine, methylisothiazolinone, and a daily fragrance; and the remainder being deionized water. This invention simplifies the judgment and operation process of softening through the synergistic effect of thermosensitive regulation and the cysteine-based reducing system. This invention also includes a method for preparing the perming composition.

The utility model belongs to the technical field of chemical production, and discloses a methylisothiazolinone production device which comprises a reaction kettle, a cooler, a centrifugal machine, an extraction kettle, a drying kettle and a distillation kettle which are sequentially communicated through pipelines, valves and pumps, the reaction kettle is provided with a temperature control device, a stirring device, a temperature sensor, a pH sensor and a pressure sensor; a solid material inlet, a liquid material inlet, a gas inlet and a gas outlet are further formed, the solid material inlet is communicated with the sulfur feeding device through a pipeline, the liquid material inlet is respectively communicated with the methylamine aqueous solution metering tank, the acrylic acid metering tank and the sodium hydroxide metering tank through pipelines, and the gas inlet is communicated with the oxygen storage tank through a pipeline. The device is reasonable in design, simple in structure, convenient to operate, high in yield and easy for industrial production.

The utility model belongs to the technical field of chemical production, and discloses a tail gas treatment device for methylisothiazolinone production, which comprises a spray tower, an acid absorption tower, an incinerator, a heat exchanger, an activated carbon adsorption tower, an induced draft fan and a chimney which are sequentially communicated through pipelines and valves, a gas outlet of the spray tower is communicated with a gas inlet of the acid absorption tower, a gas outlet of the acid absorption tower is communicated with a gas inlet of the incinerator, a gas outlet of the incinerator is communicated with a gas inlet of the heat exchanger, a gas outlet of the heat exchanger is communicated with a gas inlet of the activated carbon adsorption tower, and a gas outlet of the activated carbon adsorption tower is communicated with a gas inlet of the induced draft fan. An air outlet of the induced draft fan is communicated with an air inlet of the chimney; the acid absorption tower is provided with a circulating pump and a liquid storage tank, and a liquid outlet of the liquid storage tank is communicated to the methylamine recycling device through a pipeline and a valve. The device is reasonable in treatment process design, simple in structure and good in treatment effect.

The present invention provides a wafer cleaning solution and a method for producing the same. [Solution] The wafer cleaning solution comprises a nonionic surfactant, an anionic surfactant, an antibacterial agent, a pH adjuster, and water. The number-average molecular weight of the nonionic surfactant is 3,000 to 6,000. The anionic surfactant is selected from at least one of the group consisting of sodium lauryl sulfate and polyethylene glycol tridecyl ether phosphate. The acid dissociation constant (pKa) of the pH adjuster is 1.38 to 4.76. The antibacterial agent is selected from at least one of the group consisting of kathon, methylisothiazolinone, triclosan, chloroxyllenol, methacrylate oxide decylpyridinium bromide salt, and quaternary ammonium salt compounds.