6 results about "Methyl-isothiazolinone" patented technology

The invention relates to the technical field of sewage treatment, in particular to a preparation method of a degradable bactericide for an oil field. According to the invention, a hydroxypropyl guanidine gum-polycaprolactone-ethylenediamine fragment copolymer is taken as a carrier, a methylisothiazolinone quaternary ammonium salt (Q-MIT) bactericide is loaded, and the degradable bactericide for the oil field is obtained by cooperating with a dodecyl ethyl sulfide (TC-SE) bactericide and combining with sodium polyaspartate. A carrier forms a hydrogen bond with a polar group on the surface of a biological membrane through a hydroxypropyl guanidine gum main chain to realize targeted anchoring, a polycaprolactone branched chain encapsulates Q-MIT through a hydrophobic effect, primary amino groups of ethylenediamine are introduced to form a pH sensitive Schiff base bond with Q-MIT, and the primary amino groups and adipic dihydrazide form a thermal response hydrazide bond to construct a dual dynamic covalent bond, so that controlled release of Q-MIT is realized, and the biomembrane is prepared. And moreover, the components of the whole system are connected through degradable chemical bonds, so that the environmental protection property and sustainability of oil field operation are guaranteed.

Disclosed is a thickener dispersion including a thickener including at least one among carboxymethyl cellulose and metal salt of the carboxymethyl cellulose, a change-over-time inhibitor, and an aqueous solvent. The change-over-time inhibitor includes at least one selected from the group consisting of phenoxyethanol, sodium azide, paraben, formaldehyde, 5-chloro-2-methyl-4-isothiazolin-3-one, sodium benzoate, ethylhexylglycerin, and 1,2-hexanediol. The thickener is included in an amount of 0.05 wt % to 3.5 wt % in the thickener dispersion, and the change-over-time inhibitor is included in an amount of 0.05 wt % to 3.0 wt % in the thickener dispersion.

This utility model relates to the field of 2-methyl-4-isothiazolin-3-one production technology, and particularly to a separation and purification system for 2-methyl-4-isothiazolin-3-one. The system includes a neutralization vessel connected to a feed liquid delivery pipeline and a hydrochloric acid delivery pipeline. The outlet of the neutralization vessel and the extractant delivery pipeline are respectively connected to an extraction tower. The organic phase outlet of the extraction tower is connected to an adsorption device. The outlet of the adsorption device is connected to a distillation kettle. The vent of the distillation kettle is connected to a vacuum condenser. The condensate outlet of the vacuum condenser is connected to a solvent storage tank. The concentrate outlet of the distillation kettle is connected to a crystallization tower. The crystal outlet of the crystallization tower is connected to a centrifuge. The outlet of the centrifuge is connected to a drying device. The outlet of the drying device is connected to a product storage tank. This separation and purification system is rationally designed and can effectively separate impurities from the MIT feed liquid, greatly improving the purity of the MIT product.

A method of reducing microorganisms in process water includes treating the process water with an organic amine and treating the process water with a biocide comprising methylisothiazolinone and methylchloroisothiazolinone. Treatment with both the biocide and the organic amine reduces microorganism viability in the process water more than treatment with the biocide alone.

The invention relates to the technical field of protective coatings, in particular to an antibacterial coating for a vehicle chassis and a preparation method of the antibacterial coating. The antibacterial coating for the vehicle chassis is prepared from the following components in parts by weight: 30 to 50 parts of acrylic emulsion, 10 to 20 parts of a compound additive, 6 to 10 parts of nano calcium carbonate, 2 to 5 parts of silicon carbide, 2 to 4 parts of carbon black, 1 to 2 parts of bentonite, 2 to 3 parts of nano zinc oxide, 2 to 3 parts of dipropylene glycol butyl ether, 3 to 5 parts of tetraphenyl bisphenol-A-diphosphate, 0.6 to 1.2 parts of zinc strontium phosphate and 0.8 to 1.5 parts of iron oxide yellow. The coating is prepared from the following components in parts by weight: 0.2 to 0.5 part of 2-methyl-4-isothiazolin-3-ketone, 0.5 to 1 part of a flatting agent, 0.6 to 1.2 parts of a wetting agent, 0.5 to 1 part of a defoaming agent, 0.3 to 0.8 part of a dispersing agent and 10 to 20 parts of water. The antibacterial coating prepared by the invention not only has excellent antibacterial performance, but also has excellent wear resistance, so that the wear resistance of the vehicle chassis is effectively improved, and the probability that the vehicle chassis is scratched is reduced; and meanwhile, microbial erosion in a humid environment can be resisted, the durability and reliability of vehicle chassis protection are remarkably improved, and the service life of the vehicle chassis is prolonged to a certain extent.

This utility model discloses a Kathon production apparatus, relating to the field of Kathon production technology. A 2-methyl-4-isothiazolin-3-one tank is connected to a dissolving tank, which in turn is connected to a phosphate buffer solution tank and a primary microchannel reactor. The primary microchannel reactor is connected to an activating chlorinating agent tank and a secondary microchannel reactor. The secondary microchannel reactor is connected to the activating chlorinating agent tank and a tertiary stabilizer. The inlet of the tertiary stabilizer is connected to a sodium thiosulfate solution tank, and the outlet of the tertiary stabilizer is connected to a Kathon product tank. This significantly improves product yield, shortens the reaction cycle, enhances safety, and is environmentally friendly. The microchannel reactor ensures efficient mass and heat transfer, reduces side reactions, and improves product purity. The tertiary stabilizer ensures complete removal of residual chlorine, improving product stability.