263 results about "Sulfinic acid" patented technology

A kit for dental adhesive comprising a radical polymerizable monomer having an acid group in the molecule, a photosensitizer and/or a peroxide, a water-soluble organic solvent, an organic sulfinic acid and/or a salt thereof or a barbituric acid and/or a derivative thereof, and water. The kit may further comprises a radical polymerizable monomer which has no acid group and is insoluble or hardly soluble in water, an amine compound, a silane coupling agent and a 1,3,5-triazine-2,4-dithion derivative. By using this kit, the adhesive composition can be applied directly to a dentine without conducting a pretreatment.

A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The superabsorbent polymer is prepared using a sulfinic acid derivative, like 2-hydroxy-2-sulfinatoacetic acid, a salt thereof, or a mixture thereof, as the reducing agent in a polymerization initiator system for the preparation of a superabsorbent polymer from monomers. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.

A cobalt-iron alloy film having saturation magnetization of at least about 2.30 Telsa. The film alloy includes about 55 wt % to about 75 wt. % iron and the remainder cobalt. The film is made by a process in which the film is electrodeposited from an aqueous medium which includes one or more ferrous salts, one or more cobaltous salts, a buffer having a pKa of about 6 to about 8, at least one carboxylic acid having a pKa of between about 3.5 and about 5.5, an aromatic sulfinic acid or its salt and optionally, a halide salt and/or a surfactant. The alloy film is useful as a write head in magnetic recording.

The invention refers to a dental composition kit which comprises a combination of (A) a one-pack primer composition containing (a) an acid group-having polymerizable monomer and (b) an aromatic secondary amine and/or an aromatic tertiary amine, and (B) a cement composition containing (c) a polyalkenoic acid, (d) an ion-leachable glass filler, (e) a polymerizable monomer, (f) water, (g) a peroxide and (h) a salt of an aromatic sulfinic acid. A dental composition kit of this invention is easy to handle, and the cured product of the compositions bonds well to teeth. The kit is useful in restoring decayed or injured teeth and in bonding prostheses to teeth.

The present invention provides a process of a compound of the formula (I): wherein R is heteroaryl or the like, ring A is a heteroalicyclic group or the like comprising reacting a compound of the formula (II): wherein Hal is halogen and the other symbols are the same as the above, in the presence of a sulfinic acid salt and further in the presence of an acid or a salt with an organic base, and a novel crystal form of 2-(3-isoxazolyl)-3,6,7,9-tetrahydroimidazo[4,5-d]pyrano[4,3-b]pyridine phosphate monohydrate.

The invention relates to a method for visible light catalytic synthesis of a 3-sulfuryl spiro-trienone compound. The method comprises dissolving N-aryl propiolamide and sulfinic acid as raw materials in an acetonitrile/water mixed solvent, adding water soluble eosin as a photocatalyst into the solution, carrying out irradiation on the mixed solution under a 3W blue LED visible light lamp for a reaction at the room temperature for 6-24h, and after the reaction, separating and purifying the crude product to obtain the 3-sulfuryl spiro-trienone compound. The method utilizes a visible light energy source, a simple and easy available sulfinic acid as a sulfone source, cheap water soluble eosin as a photocatalyst and air as an oxidant, realizes synthesis of the 3-sulfuryl spiro-trienone compound at the room temperature, greatly reduces the energy consumption, effectively prevents the use of metal catalysts and peroxide oxidants and has good reaction safety.

The invention discloses a biological deodorant. The biological deodorant is characterized by comprising the following raw materials in percentage by mass: 20%-30% of a complex microbial agent, 40%-50% of organic acid and 30%-40% of calcium superphosphate, wherein the complex microbial agent comprises saccharomyces cerevisiae, bacillus subtilis, germany lactic acid bacteria, nitrobacteria, thiobacillus thiooxidans, acetobacter oxydans and an adsorption material; and the organic acid is selected from one or more of oleic acid, linoleic acid, linolenic acid, arachidonic acid, polybasic carboxylic acid, oxalic acid, malic acid, amino acid, sulfoacid and sulfinic acid. According to the biological deodorant, the original foul gas in garbage can be quickly and effectively adsorbed, removed and covered, the work environment of a worker in a composting plant is improved, composting and stabilizing of organic garbage are accelerated, and novel foul gases such as ammonia and hydrogen sulfide generated and released in the composting process are prevented from being reduced.

One embodiment of the invention provides a dental cement composition which includes (a) an acid group-having polymerizable monomer, (b) a polyalkenoic acid, (c) an ion-leachable glass filler, (d) a polymerizable monomer not having an acid group, (e) water, (f) a peroxide, (g) a salt of an aromatic sulfinic acid, and (h) an aromatic secondary amine and/or an aromatic tertiary amine.

Provided is an inkjet recording medium in which hydrated alumina and a sulfinic acid compound or thiosulfonic acid compound coexist in a pigment in an ink receiving layer, and which can prevent white-background yellowing during storage in a resin file holder or the like and ensure printing quality at the same time. The ink receiving layer of the inkjet recording medium contains the sulfinic acid compound or thiosulfonic acid compound, which functions to prevent yellowing, in a salt form or in a free form so as to be diffusible.

The invention discloses a preparation method of sulfonamide, which comprises the step of: under an atmosphere of inert gas, heating sulfinic acid or sulfinate and a nitro compound for 3 to 30 hours at the reaction temperature from 20 DEG C to 200 DEG C by using transition metal or translation metal compound as a catalyst, so as to generate sulfonamide. The preparation method disclosed by the invention has the following technical effects of an improved reaction system and stable properties, low cost and high availability of nitro compound; in this method, the nitro compound is directly used as starting material, thus avoiding the step of selectively reducing nitro into an amino compound; sulfinate is more stable and easier to store than other sulfonating agents; and simultaneously, the reaction system is simple and easy for industrial production. The method disclosed by the invention is safer and more economical and effective than the existing methods, and is also safer in used catalyst; and normally, the method disclosed by the invention can realize the conversion of nitrobenzene raw material into sulfonamide at a conversation rate of 90%, typically above 95%.

The invention relates to a titanium alloy electrochemical oxidation liquid. Every 1 kg of titanium alloy electrochemical oxidation liquid includes the following components: 180-200 g of inorganic acid or organic acid, 50-90 g of cerium salt, 5-8 g of surface active agent and the balance water, wherein the inorganic acid is any one of hydrochloric acid, sulfuric acid and nitric acid, the organic acid is any one of citric acid, carboxylic acid, sulfo acid, sulfinic acid and thionothiolic acid, the cerium salt is any one of cerous sulfate and cerium nitrate, and the surface active agent is sodium dodecyl benzene sulfonate. The titanium alloy electrochemical oxidation liquid has the advantages that the thickening of the titanium alloy surface anodic oxide film is favorable when anode oxidation is performed to the titanium alloy by adopting the titanium alloy electrochemical oxidation liquid, and the performance of the anodic oxide film can be enhanced.

The invention discloses a synthesis method of 7- phenylacetamide-3-chloromethyl-4- cephalsporanic acid p- methoxybenzyl ester(GCLE). The invention takes the penicillin G kali salts mass made in China as starting materials; firstly, the penicillin G kali salts reacts with the p- methoxy benzyl chloride to obtain p- methoxybenzyl ester; secondly, the p- methoxybenzyl ester is oxidized by peroxy acetic acid to obtain penicillin sulfoxide ester; the penicillin sulfoxide ester firstly reacts with the 2- mercaptobenzothiazole, and then reacts with benzene sulfinic acid to obtain ring opening products; the ring opening products reacts with chlorine gases to obtain chlorination products; the chlorination products reacts with ammonia gases to obtain 7- phenylacetamide-3-chloromethyl-4- cephalsporanic acid p- methoxybenzyl ester(GCLE).

The invention relates to a preparation method of an aromatic sulfinic acid compound. The preparation method includes the steps of: with Lewis acid as a catalyst, performing a Friedel-Crafts acylation reaction to an aromatic compound as a raw material with 1,4-diazabicyclo[2.2.2]octane (DABSO) in a solvent to generate a corresponding aromatic sulfinic acid compound. Compared with industrial preparation methods for the aromatic sulfinic acid compound in the prior art, the method can synthesize the aromatic sulfinic acid compound in one step, so that experiment operations are simplified and a high-polluting chlorosulfonation step is avoided. The method has mild reaction conditions, wherein the reaction can be carried out under a common normal temperature condition, so that a large amount of energy consumption in production is reduced. The DABSO, compared with gas-phase SO2, is convenient to store and transport, has stable properties at normal temperature and under normal pressure and has safe and simple operations. The raw materials are low in cost and easy to obtain, thus reducing production cost. The method has huge potential in practical use.

The present invention provides compounds of Formula I:

wherein: R₁ is a label (e.g., a detectable groups; an anti-tumor agent)s; L is present or absent and when present is a linking group; and x represents an integer from 1 to 10; or a pharmaceutically acceptable salt thereof. the compounds are useful for, among other things, identifying cysteine sulfenic acids in proteins and monitoring oxidative damage in proteins and cells.

An integrated controlled catalytic oxidation process converts low value disulfide oil (DSO) compounds produced as a by-product of a generalized mercaptan oxidation (MEROX) process into oxidized DSO (ODSO) compounds including sulfoxides, sulfones, sulfonates and sulfinates that are completely or partially water soluble and which have utility, e.g., as lubricity additives in diesel fuel and as a solvent in aromatic solvent separation processes.

The present invention provides a preparation process for converting to a vinylidene fluoride elastomer having a group having sulfinic acid, sulfinic acid derivative, sulfonic acid or sulfonic acid derivative at one end or both ends of its trunk chain, and the preparation process provides a vinylidene fluoride elastomer having, at one end or both ends of its trunk chain, end groups represented by the formula: —CR¹R²—CR³R⁴—SO₂H, wherein R¹ to R⁴ may be the same or different and each is hydrogen atom or fluorine atom, by allowing a vinylidene fluoride elastomer having, at one end or both ends of its trunk chain, end groups represented by the formula: —CR¹R²—CR³R⁴—X¹, wherein R¹ to R⁴ are as defined above, X¹ is bromine atom or iodine atom, to react with a sulfur compound represented by the formula: (M¹)_nH_2−nS₂O₄, wherein M¹ is a monovalent or divalent metal ion or ammonium ion, n is an integer of 0 to 2.

The invention relates to an aerobic oxidation system and a photoinduced aerobic oxidation method thereof. The aerobic oxidation system comprises 1) at least one of the following substances 1a)-1d): 1a) sulfinic acid or a derivative thereof; 1b) sulfonic acid or a derivative thereof; 1c) a compound or mixture that can produce sulfinic acid or a derivative thereof by reaction; 1d) a compound or mixture that can produce sulfonic acid or a derivative thereof by reaction; and 2) a molecular oxygen-containing component comprising at least one of oxygen, an oxygen-containing gas and a raw material ofa reaction system capable of generating oxygen molecules in situ. When the aerobic oxidation system is used for an oxidation method, a series of compounds can be subjected to aerobic oxidation at room temperature without adding a photosensitization reagent under an illumination condition to obtain corresponding oxidation products so that the production cost is reduced; in addition, the method cangreatly reduce energy consumption, and thoroughly solves the problem of environmental pollution caused by waste discharge brought by heavy metals and acidic solvents, and the problem of metal residues in the product.

A process for preparing an aqueous emulsion polymer including providing at least one ethylenically unsaturated monomer and a free radical redox initiator system under emulsion polymerization conditions, the redox initiator system including a water-soluble oxidizing agent, a water-insoluble oxidizing agent, and a sulfinic acid, or salts thereof, reducing agent; and effecting the polymerization of at least some of the ethylenically unsaturated monomer is provided. Also provided is a process for reducing the residual ethylenically unsaturated monomer content of an aqueous emulsion polymer.