825 results about "Pyridinium" patented technology

A process for the production of a high quality gasoline blending components from refinery process streams by the alkylation of light isoparaffins with olefins using an ionic liquid catalyst is disclosed. The process includes reacting a refinery stream containing isopentane and/or isobutane with a refinery stream containing ethylene and/or propylene and butylenes under alkylation conditions in the presence of a chloroaluminate ionic liquid catalyst comprising a hydrocarbyl substituted pyridinium halide or a hydrocarbyl substituted imidazolium halide of the general formulas A and B, respectively.

Where R=H, methyl, ethyl, propyl, butyl, pentyl or hexyl group and X is a halide and preferably a chloride, and R1 and R2=H, methyl, ethyl, propyl, butyl, pentyl or hexyl group and where R1 and R2 may or may not be the same.

The present invention relates to a mouthspray formulation, which reduces oral bacteria and is effective against dental plaque, gingivitis and oral malodor. The preferred formulation has a bactericidal agent with cetyl pyridinium chloride and domiphen bromide, an alcohol, a sweetener component, and a flavor system. The flavor system may also have or more of the following: a flavorant, a humectant, a surfactant, a sweetener, and a colorant agent.

A novel cephem compound of the formula:wherein R1 is a phosphono group or a group convertible to a phosphono group; R2 is a hydrogen atom or a group having a linkage through a carbon atom; each of Q and X is a nitrogen atom or CH; Y is S, O or CH2; n is 0 or 1; one of R3 and R4 is a pyridinium group which may be substituted and the other is a hydrogen atom or hydrocarbon group which may be substituted, or R3 and R4 taken together may form a quaternalized nitrogen-containing heterocyclic ring which may be substituted, or its ester or its salt, which has a superior anti-bacterial activity, stability, absorbability, etc., a production thereof and a pharmaceutical composition containing it, is provided.

The invention relates to the hydropyridine derivatives of 2-acetoxy-5- (Alpha-cyclopropyl carbonyl-2-fluorobenzyl) -4, 5, 6, 7-tetrahydrothiophene plus [3, 2-C] pyridine and salts of the hydropyridine derivative as well as the preparation method. The invention comprises following steps: preparing two main intermediates: Alpha-cyclopropyl carbonyl-2 fluorobenzyl halogen 2 (wherein, X=F, CL, Br, I) and 2-oxygen-2, 4, 5, 6, 7, 7 Alpha-hexahydrothiophene plus [3, 2-C] pyridinium salt 3 (wherein, HA=HCL, H2SO4, HBr, HI); esterifying the product obtained through condension of the two main intermediates using acetic anhydride to get target product. The target product and the needed acid are combined to be salts via addition reaction; during the process of crystallization, necessary crystal seed is added to achieve single-morphic crystals.

An electrochemical device converts carbon dioxide to a reaction product. The device includes an anode and a cathode, each comprising a quantity of catalyst. The anode and cathode each has reactant introduced thereto. A polymer electrolyte membrane is interposed between the anode and the cathode. At least a portion of the cathode catalyst is directly exposed to gaseous carbon dioxide during electrolysis. The average current density at the membrane is at least 20 mA/cm², measured as the area of the cathode gas diffusion layer that is covered by catalyst, and CO selectivity is at least 50% at a cell potential of 3.0 V. In some embodiments, the polymer electrolyte membrane comprises a polymer in which a constituent monomer is (p-vinylbenzyl)-R, where R is selected from the group consisting of imidazoliums, pyridiniums and phosphoniums. In some embodiments, the polymer electrolyte membrane is a Helper Membrane comprising a polymer containing an imidazolium ligand, a pyridinium ligand, or a phosphonium ligand.

The present invention relates to a topical skin care composition containing a safe and effective amount of a skin care active comprising agmatine, and its salt; a safe and effective amount of a first additional skin care active selected from the group consisting of BHT or BHA, hexamidine, cetyl pyridinium chloride, green tea catechins, phytosterols, ursolic acid, compounds derived from plant extracts, their salts and derivatives; and a dermatologically acceptable carrier for the agmatine composition. The present invention also relates to methods of using such agmatine compositions to regulate hair growth and the condition of mammalian skin. Said methods generally comprise the step of topically applying the composition to the skin of a mammal needing such treatment, a safe and effective amount of such compositions.

The invention discloses an imitation mussel attachment protein and cell membrane structure double-bionic copolymer shown by the structural formula (I), wherein m is an integer from 10 to 1,000, n is an integer from 0 to 500, and x is an integer from 5 to 500; in the m, n and x, the molar percentage of m is 30-90%, the molar percentage of n is 0-50%, and the molar percentage of x is 10-70%; R1, R2 and R3 are H or CH3; R4 is an alkyl with 4-18 carbon atoms; V is a catechol group with 2-300 carbon atoms in chain connection; W is a hydrophilic group with 2-8 carbon atoms in chain connection; and the hydrophilic group is a quaternary ammonium group, phosphorylcholine group, pyridinium, sulfonic acid group, phosphate group, carboxylic acid group or sulfuric acid group. According to the invention, the coating is in firm combination, the copolymer is almost suitable for an establishment method of a surface imitation cellulosa membrane structure of any material, and the surface hydrophilic performance and biocompatibility of artificial organ and related materials, medicine controlled-release systems, separation materials and other materials can be improved.

The present invention relates to an ionic liquid compound of general formula C⁺A⁻, where C⁺ represents an organic cation such as alkyl-pyridinium, di-alkyl imidazolium and tri-alkyl imidazolium; and A⁻ is an anion of halides of iron (III), such as, for example, FeCl₄⁻ and to a method of producing the ionic liquid compound by heating the reactants using microwave energy. The ionic liquids can be used to desulfurize hydrocarbon mixtures by a liquid-liquid extraction.

Disclosed are oral care compositions effective to control mouth and breath malodour comprising in a pharmaceutically acceptable carrier, a combination of an antibacterial agent and a deodorizing or odor-neutralizing agent comprising a compound having the structure

wherein R¹, R², R³, and R⁵ may be identical or different, each representing H, a linear or branched C1-C6 alkyl or alkenyl, phenyl, —OH or —OR^a; R⁴ is —OH, —OR^a, phenyl, or a linear or branched C1-C6 alkyl or alkenyl; and R^a is phenyl or a linear or branched C1-C6 alkyl or alkenyl. The odor-neutralizing agent may further comprise one or more of an additional odor-neutralizing compound selected from α-damascenone, α-isomethylionone, α-ionone, β-ionone, pulegone, piperitone, carvone, coenzyme Q10 or cinnamaldehyde.

The antibacterial agent may comprise one or a mixture of a quaternary ammonium compound selected from cetylpyridinium chloride, tetradecylpyridinium chloride, N-tetradecyl-4-ethyl pyridinium chloride or domiphen bromide; metal ions such as stannous, zinc or copper; chlorhexidine; triclosan; triclosan monophosphate; or selected essential oils.

Disclosed are oral care mouth rinse compositions formulated as stable oil-in-water emulsions comprising:

• • (a) at least about 0.025% by weight of a quaternary ammonium antimicrobial agent,
  • (b) at least about 0.05% by weight of an essentially water-insoluble volatile oil, and
  • (c) at least about 50% by weight water,

wherein the emulsion comprises oil droplets having an average mean particle size of about 350 nm or less.

Examples of quaternary ammonium antimicrobial agent include cetylpyridinium chloride (CPC), tetradecylpyridinium chloride, N-tetradecyl-4-ethyl pyridinium chloride or domiphen bromide.

The invention provides peptide derivatives designed to deliver peptides having growth factor inhibitory activity, especially somatostatin analogs, to the retina by sequential metabolism. The peptide derivatives, which comprise a dihydropyridine<CUSTOM-CHARACTER FILE="US06440933-20020827-P00900.TIF" ALT="custom character" HE="20" WI="20" ID="CUSTOM-CHARACTER-00001"/>pyridinium salt-type redox targetor moiety, a bulky lipophilic function and an amino acid/dipeptide/tripeptide spacer, are used in the prevention and treatment of diabetic retinopathy.

An ion conducting polymeric composition mixture comprises a copolymer of styrene and vinylbenzyl-R_s. R_s is selected from the group consisting of imidazoliums, pyridiniums, pyrazoliums, pyrrolidiniums, pyrroliums, pyrimidiums, piperidiniums, indoliums, and triaziniums. The composition contains 10%-90% by weight of vinylbenzyl-R_s. The composition can further comprise a polyolefin comprising substituted polyolefins, a polymer comprising cyclic amine groups, a polymer comprising at least one of a phenylene group and a phenyl group, a polyamide, and/or the reaction product of a constituent having two carbon-carbon double bonds. The composition can be in the form of a membrane. In a preferred embodiment, the membrane is a Helper Membrane that increases the faradaic efficiency of an electrochemical cell into which the membrane is incorporated, and also allows product formation at lower voltages than in cells without the Helper Membrane.

The invention relates to a salt tolerant corrosion and scale inhibitor for underground oil-gas wells and a preparation method thereof. The salt tolerant corrosion and scale inhibitor is composed of an oxazoline derivative, thiourea, cetyl pyridinium chloride, dodecyl dimethyl benzyl ammonium chloride, amino trimethylene phosphonic acid, hydroxyethylidene diphosphonic acid, hexamethylenetetramine, and methanol. The corrosion and scale inhibitor has very strong salt resistance, and under high salinity conditions (100000-200000mg/L), has a significant inhibiting effect on metal corrosion, and the corrosion inhibition rate can reach more than 80%. The organic phosphonic acid molecular structure of the reagent contain a double bond structure, the structure and the calcium ions and magnesium ions in water can chelate to form a stable complex to be adsorbed on seed crystal surface active sites, thereby inhibiting crystal normal growth. With significant scale inhibiting effect and a scale inhibiting rate up to 94%, the product is suitable for inhibiting corrosion and scaling phenomena of oil-gas well rods and pipes containing carbon dioxide, hydrogen sulfide and other complex media conditions under high salinity.

A process for producing an arylamine is provided which is characterized by reacting an aromatic halogen compound with an aromatic amine in the presence of an organic salt selected from specific pyridinium salts, imidazolium salts and quaternary onium salts, a copper catalyst, and a base. Thus, the reaction of even an aromatic halogen compound substituted by an electron-donating group proceeds efficiently, and an inexpensive chlorinated aromatic compound or brominated aromatic compound is usable, and an arylamine, in particular a triarylamine or diarylamine, having a high purity can be produced at low cost.

Embodiments of the present invention provide methods and nucleic acid reporter molecules for the detection of nucleic acid in a sample. The nucleic acid reporter molecule comprises two unsymmetrical cyanine monomer moieties, which may be the same or different, that are covalently attached by a linker comprising at least one aromatic, heteroaromatic, cyclic or heterocyclic moiety comprising 3-20 non-hydrogen atoms selected from the group consisting of O, N, S, P and C. The linker may be rigid, relatively flexible or some degree thereof. The unsymmetrical cyanine monomer moieties comprise a substituted or unsubstituted benzazolium moiety and a substituted or unsubstituted pyridinium or quinolinium moiety that is connected by a methine bridge that is monomethine, trimethine or pentamethine. The linkers form the cyanine dimer compounds by attaching to the pyridinium or quinolinium moiety of the monomer moieties. The present nucleic acid reporter molecules find utility in forming a nucleic acid-reporter molecule complex and detecting the nucleic acid. In particular, present nucleic acid reporter molecules with a rigid linker and monomer moieties with a monomethine bridge find utility in detecting RNA in the presence of DNA.

A quaternary nitrogen-containing corrosion inhibitor of formula

wherein

is an aromatic, nitrogen-containing ring of 5 to 14 ring atoms, optionally containing an additional N, O or S ring atom and optionally substituted with one or more alkyl, alkenyl, aryl, arylalkyl, cycloalkyl, amino, aminoalkyl, alkoxy, hydroxylalkyl, or cyano groups, or a mixture thereof, Y is a group of formula —OC(O)R₁ or —C(O)R₁; L is C₁-C₁₀ alkyl, C₂-C₁₀ alkenyl or a group of formula CH₂CH(OR₂)CH₂—; R₁ is C₈-C₂₀ alkyl or C₈-C₂₀ alkenyl; R₂ is H or C(O)R₁; R₃ and R⁴ are independently selected from H, alkyl, alkenyl, amino, alkoxy, hydroxylalkyl and cyano; and X is Br, Cl or I is particularly useful for inhibiting corrosion in oil and gas field applications.