- Method for coproducing OIT and DCOIT
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The invention discloses a method for coproducing OIT and DCOIT. The method comprises the following steps: adding a raw material N, N'-di-n-octyldithiodipropionamide or N-n-octylmercaptopropionamide and a solvent into a chlorination reaction kettle, introducing chlorine, and carrying out solid-liquid separation on the material in the reaction kettle after the reaction is finished; distilling the obtained mother liquor under reduced pressure, and reserving kettle residues for later use; transferring the obtained filter cake to a neutralization kettle, adding a solvent and alkali liquor for neutralization and liquid separation to obtain an organic layer; carrying out water washing, desolventizing and filtering part on the organic layer to obtain the OIT finished product; carrying out azeotropic dehydration on the other part of the organic layer, combining with the kettle residues, introducing chlorine for chlorination, adding an alkali liquor into reaction liquid obtained after the reaction is finished for neutralization, and filtering; and recrystallizing the obtained filter cake, and leaching and drying the obtained solid to obtain the DCOIT finished product. According to the invention, the production efficiency is improved, the product quality is improved, and the method is an efficient and environment-friendly production method.
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Paragraph 0032-0034; 0036-0038; 0040-0042; 0048; 0049
(2021/01/11)
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- Pipeline type continuous production method of 3-isothiazolinone compound
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The invention discloses a pipeline type continuous production method of a 3-isothiazolinone compound, which comprises the following steps: carrying out mixed reaction on a thioamide compound, a catalyst, a solvent and chlorine through a pipeline reactor system, and carrying out after-treatment after the reaction is completed to obtain the 3-isothiazolinone compound. According to the method, the defects of large occupied area, small productivity, low efficiency, high energy consumption and small safety coefficient caused by existing batch production of the 3-isothiazolinone compound are overcome; the invention provides a mode for continuously producing the 3-isothiazolinone compound, so that the reaction process is easy to control, energy consumption is reduced, the production efficiency and the safety coefficient of the production process are improved, and the process is an efficient and energy-saving safe production process.
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Paragraph 0020
(2019/12/02)
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- A 4, 5 - dichloro - N - [...] thiazolinone preparation method
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A preparation method of 4,5-dichloro-N-n-octyl isothiazolinone uses N,N- di-n-octyl-3,3-disulfide-di-propionamide as a raw material, and comprises the following steps: mixing N,N- di-n-octyl-3,3-disulfide-di-propionamide with a chloro solvent; adding a composite catalyst comprising metal chlorides, thiophene compounds and crown ether compounds; adding a chlorating agent at a low-temperature condition for closed-loop chlorination; carrying out separation and purification to obtain the 4,5-dichloro-N-n-octyl isothiazolinone. Tests show that the purity of the 4,5-dichloro-N-n-octyl isothiazolinone prepared according to the method can be higher than 98 percent; the product yield can be higher than 65 to 75 percent. Compared with the prior art, the method has the advantages that as the composite catalyst is adopted, the reaction time is short, the product cost is low, and the yield is high; the catalyst, the solvent as well as unreacted raw materials can be recycled, so that the requirements of environmental protection are met; the method is high in selectivity, mild in reaction, easy to control, stable in product quality, and high in yield, thereby being suitable for industrialized production.
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Paragraph 0011; 0027-0032
(2019/02/08)
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- STABLE COMPOSITIONS OF THIABENDAZOLE AND IODINE-CONTAINING FUNGICIDES
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The present invention relates to stable compositions for the fungicidal equipment of thermoplastic polymers, in particular PVC, comprising thiabendazole, at least one iodine-containing fungicide and at least one epoxide and optionally further fungicidally active compounds, and also to methods for preparing these formulations and to uses thereof for the protection of thermoplastic polymers against attack and destruction by microorganisms. Moreover, the invention relates to mold-resistant PVC materials equipped with the compositions according to the invention.
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- FUNGICIDAL PENFLUFEN MIXTURES
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The invention relates to mixtures comprising penflufen, to the use of these mixtures for protecting industrial materials and to a method for treating industrial materials with the penflufen mixtures.
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- Preparation of N-Substituted Isothiazolinone Derivatives
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Provided is a process for the preparation of an N-substituted isothiazolinone derivative having the general formula (I), comprising reacting N-substituted 3-mercaptopropionamides of formula (II) or N,N′-bis-substituted 3,3′-dithiodipropionamides of formula (III) with sulfuryl chloride in the absence of solvents. Also provided is a process for the preparation of a compound having the general formula (III), comprising reacting a methyl ester of formula (IV) with an amine of formula (V) in a solvent of methanol. As no addition solvent is used in the process of the invention, the cost of manufacturing and pollution to the environment can be reduced.
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Page/Page column 3
(2008/12/07)
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- Bromonitrothienyldioxanes
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The invention relates to novel 5-bromo-5-nitro-2-thienyl-1,3-dioxanes of the formula (I) in which R1, R2 and R3 are as defined in the description are highly suitable for use as biocides for protecting plants and industrial materials.
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- 3-NITROISOXAZOLES AND THEIR USE IN THE PROTECTION OF MATERIALS
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The 3-nitroisoxazoles of the formula (I) in which R1 and R2 are each as defined in the description, some of which are known, are highly suitable for use as biocides for protecting industrial materials.
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- Thiazines and thiazoles as agents for protecting materials
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The novel and known thiazines and thiazoles of the formula (I) in which R1, R2 and n are as defined in the description, are highly suitable for use as biocides for protecting industrial materials.
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- O-aryl dithiazole dioxides
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The invention relates to new O-aryldithiazole dioxides, to two processes for their preparation, and to their use as pesticides in crop protection and in the protection of materials.
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- Composite material for treating photographic effluents
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The present invention relates to a composite material with an improved structure in which is dispersed an active organic compound, and a method for treating effluents, in particular a method for treating photographic effluents. The present invention relates to a composite material that takes the form of a structured gel comprising an aluminosilicate polymer matrix in the form of fibers in which at least two distinct fibers are interconnected by at least two covalent bonds to form an irreversible chemical gel and, dispersed in the matrix, an active organic compound. The choice of the degree of cross-linking of the matrix makes it possible to control the diffusion of a hydrophilic active organic compound. The invention further concerns a method for preparing such a composite material.
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- Synergistic biocide composition
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A biocide composition is provided as an addition to substances that can be infected by harmful microorganisms, in which the biocide composition has at least two active biocidal substances, one of which is 2-methylisothiazolin-3-one. The composition is characterized in that it contains 1,2-benzisothiazolin-3-one, compositions containing 5-chloro-2-methylisothiazolin-3-one being excluded. In comparison with its individual components, the composition of the invention has a synergistic biocidal activity.
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- Method for producing 2-alkyl-4-isothiazoline-3-one
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Chlorinating agent is reacted with a compound represented by formula (I) (wherein R represents C1 to C8 alkyl groups or aralkyl groups) or a compound represented by formula (II) in a solvent in which hydrogen chloride is insoluble or has low solubility, to prepare 2-alkyl-4-isothiazoline-3-ones represented by general formula (III)
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- Agents for preserving technical materials against insects
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The use of the compounds of the formula (I) as agents for preserving technical materials against insects.
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- Wood preservatives
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Wood preservatives having biocidal properties which include quaternary ammonium compounds of general formula (I): wherein R1 is a C8-18-alkyl group or an optionally substituted benzyl group, R2 is a C8-18-alkyl group, R3 is a C1-4-alkyl group or a group of the formula —[CH2—CH2—O]n—H, R4 is a C1-4-alkyl group, n is a number from 0.5 to 8, preferably from 1 to 5, and A?is the anion of an organic carboxylic acid which contains 2 to 12 C atoms and carries at least one hydroxyl, amino or sulfonic acid group. The wood preservatives also penetrate deeply into the wood without the use of pressure, and have only a mild corrosive action on metals. Furthermore, a process for treating timbers with these compositions, concentrates for the preparation thereof, the use of new and known quaternary ammonium compounds in wood preservatives and new quaternary ammonium compounds and their use as biocides.
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- Dithiazoldioxides and the use thereof as microbicides
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The invention relates to novel dithiazole dioxides, to processes for their preparation and to their use in crop protection and in the protection of materials.
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- Arylthio-dithiazindioxides and their use as pesticides
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PCT No. PCT/EP97/07242 Sec. 371 Date Jun. 23, 1999 Sec. 102(e) Date Jun. 23, 1999 PCT Filed Dec. 22, 1997 PCT Pub. No. WO98/29400 PCT Pub. Date Jul. 9, 1998The invention relates to novel S-aryl-dithiazine dioxides, to processes for their preparation and to the use in crop protection and in the protection of materials.
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- N-sulfonyliminodithio compounds useful for in plant and material protection
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N-sulfonyliminodithio compounds have the formula (I), in which R1 and R2 stand for optionally substituted alkyl, alkenyl or alkinyl, and Ar stands for optionally substituted aryl; also disclosed are processes for preparing these compounds and their use for plant and material protection. STR1
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- 1,3,2-benzodithiazol-1-oxides as microbiocides
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A description is given of novel and know 1,3,2-benzodithiazole 1-oxides of the formula (I) STR1 and of their preparation and use for protecting industrial materials against infestation by microorganisms.
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- Mould-resistant emulsion paints
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The application relates to emulsion paints which are protected against fungal infestation by the use of N-alkyl-benzothiophene-2-carboxamide S,S-dioxides.
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- Thiazolylpyrazolinones and their use for protecting technical materials
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The present invention relates to novel thiazolylpyrazolinones, a process for their preparation and their use for the protection of technical materials.
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- Medicaments containing 1-thiocarbamoyl-5-hydroxy-pyrazoles and their use as agents for combating septic shock
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This application relates to new thiocarbamoyl compounds of the formula (I) STR1 in which R1, R2, R3 and R4 have the meanings given in the description.
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- Termite-controlling agent composition
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Combating termites with a composition comprising (a) at least one compound of the formula STR1 wherein, R denotes a hydrogen atom, acyl, alkyl or optionally substituted heteroarylalkyl, A denotes a hydrogen atom, alkyl or a bivalent group which binds to B, D denotes alkyl, --S--R1, STR2 or bivalent group or atom which binds to A. wherein R1 or R2 each independently denotes a hydrogen atom, acyl, alkyl or optionally substituted heteroarylalkyl. Y denotes =N-- or STR3 wherein T1 denotes a hydrogen atom or optionally substituted alkyl, and X denotes an electron attracting group, and (b) a pyrethoid compound.
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- Method of disinfecting a contact lens and preserving a contact lens care solution
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The method of imparting antimicrobial activity to a contact lens composition by adding to the composition an effective amount of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one.
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- Alkene stabilizers for 3-isothiazolone compounds
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A method of stabilizing a 3-isothiazolone compound against chemical decomposition comprising introducing a sufficient amount of an alkene to stabilize said 3-isothiazolone compound and a composition comprising 3-isothiazolone and an amount of an alkene sufficient to stabilize said isothiazolone.
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- Protracted release microbiocidal article for aqueous systems
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There is disclosed as an article a water-permeable membrane containing sealed therein a solid particulate microbiocidal composition which is useful in aqueous systems, wherein the composition is produced from a microbiocidal compound having relatively low water solubility or a combination thereof with other microbiocidal compounds having relatively high water solubility to give a combination generally characterized by low water solubility in admixture with an inert, finely-divided water-insoluble solid carrier material. Especially useful are microbiocidal 3-isothiazolones and 2-substituted-1,2-benzisothiazolones having relatively low water solubility, and metal salt stabilized derivatives thereof, admixed with silicaceous diatomaceous earth. These articles afford protracted controlled release of active ingredient and also afford a safer form of the active ingredient heretofore known to be relatively irritating to the skin of man when at high concentration in aqueous solution.
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