8 results about "Potassium benzoate" patented technology

A long-term fire retarding biochemical liquid composition including: a dispersing agent realized in the form of a major amount of water, for dispersing alkali metal ions dissolved in the water; a major amount of a first fire retarding agent realized in the form of a primary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, tripotassium citrate, for providing metal potassium ions dispersed in the water when the at least one alkali metal salt is dissolved in the water to form a mixed retardant solution; a minor amount of a second fire retarding agent realized in the form of a secondary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, potassium, sodium, calcium and / or magnesium benzoate, for providing benzoate ions dispersed in the water when the secondary alkali metal salt is dissolved in the mixed retardant solution, for functioning as a secondary fire retardant agent.

This application provides a method for preparing compound I-b or a pharmaceutically acceptable salt thereof, wherein (S)-N-methylamino-1-(2-thiophene)-1-propanol reacts with 4-fluorobenzo[1,3]dioxolane in a system containing sodium hydride and potassium benzoate to obtain compound I-b. This method has short steps, mild reaction conditions, and is simple to operate, making it suitable for industrial scale-up; moreover, the obtained product has high purity and low isomer content.

The invention relates to the technical field of p-hydroxybenzoic acid preparation, and discloses a p-hydroxybenzoic acid preparation method, which comprises: 1, mixing benzoic acid and a potassium hydroxide solution to form a potassium phenolate solution; 2, in an alkaline aqueous solution system, carrying out a directional hydroxylation reaction with a hydroxylation reagent in the presence of a phase transfer catalyst to generate potassium p-hydroxybenzoate; and step 3, converting the potassium p-hydroxybenzoate into p-hydroxybenzoic acid through acidification treatment. Compared with the prior art, the preparation method of p-hydroxybenzoic acid provided by the invention has the advantages of high efficiency, environmental protection and suitability for industrial production. The method comprises the following steps: reacting a potassium phenolate solution under an alkaline condition to generate potassium p-hydroxybenzoate under the catalysis of a phase transfer catalyst, and acidizing to obtain p-hydroxybenzoic acid. The method has the advantages of mild reaction conditions, high yield, few byproducts, easiness in industrial production and the like.

The invention relates to the technical field of building materials, in particular to a solanum nigrum stem and leaf compounded steel bar corrosion inhibitor and a preparation method and application thereof. The corrosion inhibitor comprises the following components in parts by mass: 20-40 parts of a solanum nigrum stem and leaf extract, 5-10 parts of potassium benzoate, 1-2 parts of magnesium oxide and 20-50 parts of water, the preparation method of the solanum nigrum stem and leaf extract comprises the following steps: selecting solanum nigrum stems and leaves as raw materials, washing with clear water, drying, crushing and sieving to obtain solanum nigrum stem and leaf powder; adding into an ethanol solution, fully soaking at room temperature, and performing reflux extraction; performing reduced-pressure suction filtration after extraction, and collecting filtrate; concentrating to obtain a concentrated solution; and drying the concentrated solution to obtain the solanum nigrum stem and leaf extract. The corrosion inhibitor is doped into reinforced concrete to delay corrosion of reinforcing steel bars. The corrosion inhibitor has the advantages of no toxicity, no pollution, no cancerogenic substances, low cost, strong environmental protection property and good durability, and can generate a compact protective film on the surface of the reinforcing steel bar to effectively inhibit the corrosion of the reinforcing steel bar.

The invention discloses a low-conductivity new energy vehicle anti-freezing solution and a preparation method thereof. The low-conductivity new energy vehicle anti-freezing solution comprises the following components in percentage by volume: 40%-60% of ethylene glycol, 35%-55% of deionized water, 1.0%-5.0% of an insulating additive, 0.5%-3.0% of a corrosion inhibitor composition, 0.01%-0.1% of a defoaming agent, 0.05%-0.3% of a dye and 0.1%-1.0% of a pH regulator, sodium benzoate, potassium benzoate, sodium sebacate or potassium sebacate are adopted as specific insulating additives, and the additives can form a molecular micelle form in a system, so that metal ions are bound, the ionization tendency of the system is inhibited, the anti-freezing solution has low conductivity lower than 10 [mu] S / cm at the temperature of 25 DEG C, and the anti-freezing effect is good. And the form can be kept stable under the working conditions of long-term high-temperature circulation and wide temperature range, so that the insulating property is ensured not to be obviously attenuated along with the prolonging of the service time.

Pyrotechnic mixture with potassium benzanate, said pyrotechnic mixture comprising a binary or ternary intermixture comprising at least two selected from potassium benzanate, copper picramate and potassium picrate.

A long-term fire retarding biochemical liquid composition including: a dispersing agent realized in the form of a major amount of water, for dispersing alkali metal ions dissolved in the water; a major amount of a first fire retarding agent realized in the form of a primary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, tripotassium citrate, for providing metal potassium ions dispersed in the water when the at least one alkali metal salt is dissolved in the water to form a mixed retardant solution; a minor amount of a second fire retarding agent realized in the form of a secondary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, potassium, sodium, calcium and / or magnesium benzoate, for providing benzoate ions dispersed in the water when the secondary alkali metal salt is dissolved in the mixed retardant solution, for functioning as a secondary fire retardant agent and also inhibiting surface corrosion reactions involving metals contacting the mixed retardant solution, including specific metals, namely aluminum, steel, bright steel, brass, and magnesium; a minor amount of thickening agent in the form of a biomolecular polymer consisting essentially of polysaccharides; a minor amount of a dispersing agent for dispersing benzoate ions present in the water when the at least one alkali metal salt is dissolved in the mixed retardant solution, so as to promote the formation of a corrosion inhibiting coating on metals contacting the mixed retardant solution and inhibiting surface corrosion reactions involving the metals; and a minor amount of coloring agent in the form of fugitive color dye powder, or non-fugitive pigment powder, for imparting a visible color characteristics when the fire retarding biochemical liquid composition is being applied to a surface to be protected against fire, to form a thin fire retardant coating deposited on treated surfaces, comprising a mixture of metal alkali salt crystals within the polysaccharides of the biomolecular polymer. Wet and dry concentration formulations of the fire retarding biochemical liquid composition are disclosed for use with both aerial and ground delivery methods and apparatus.

This invention belongs to the field of chemical synthesis technology, specifically relating to a method for the direct-directed nickel-catalyzed Markovnikov hydroynkylation of amino groups to synthesize γ-ynylamines from non-activated olefins. The method includes mixing ethylene glycol dimethyl ether dibromide, ethylenediamine ligands, 3-en-1 amine compounds, potassium benzoate, trimethoxysilane, ynyl bromide, and an ether solvent. The resulting mixture undergoes a Markovnikov hydroynkylation reaction to yield γ-ynylamine compounds. This reaction utilizes inexpensive and readily available nickel catalysts (such as NiBr2·DME) and hydroxyl sources (such as (MeO)3SiH) under mild conditions, and is compatible with tertiary cyclic / acyclic amines and secondary alkyl / aryl amine substrates, as well as aryl, alkyl, and silyl-substituted ynkylation reagents, achieving a broad substrate applicability. Furthermore, this preparation method exhibits mild reaction conditions, good regioselectivity, and low cost, demonstrating excellent industrialization potential.