摘要:
The invention enables reduction of catalyst in producing tetrafluorobenzonitrile by decyanation of one cyano group of tetrafluorodicyanobenzene by using a synthetic zeolite, particularly Zeolite 3A, 4A or 5A, in the reaction. Therefore, the invention provides an industrially useful process capable of producing tetrafluorobenzonitrile, a useful agrochemical and drug intermediate, by hydrogenolysis of tetrafluorodicyanobenzene to decyanate one cyano group with the use of catalyst in small amounts.
摘要:
To provide a novel method for producing a fluorinated benzenedimethanol compound useful as a starting material or an intermediate in the production of agricultural or medicinal chemicals in an industrially advantageous manner.A method for producing a fluorinated benzenedimethanol compound according to the present invention comprises the steps of reducing the nitrile groups of a fluorinated benzenedinitrile compound to obtain a fluorinated xylylenediamine compound and then converting the aminomethyl groups of the fluorinated xylylenediamine compound into hydroxymethyl groups.
摘要:
A process for producing a fluorinated benzonitrile comprising hydrogenolyzing a fluorinated dicyanobenzene substituted with 1 to 4 fluorine atoms and having the remainder which may be substituted with a chlorine atom in the presence of a catalyst to cause hydrodecyanation of only the cyano group of one side and a process for producing a fluorinated benzyl alcohol comprising reducing the fluorinated benzonitrile and hydrolyzing the fluorinated benzonitrile and reducing the resultant corresponding fluorinated benzoic acid to convert the cyano group to a hydroxymethyl group.
摘要:
The invention is directed to a process for preparing N-phosphonomethylglycine comprising the steps of reacting an aminomethylphosphonic acid with a glyconitrile in the presence of an alkali metal hydroxide to form a product, and then hydrolyzing the product by adding an alkali metal hydroxide in an amount sufficient to neutralize the resulting carboxylic acid.
摘要:
This invention provides a granular polysaccharide polymer having phthalocyanine bonded thereto which is a crosslinked polymer comprising a phthalocyanine skeleton covalently bonded to a crosslinked granular porous chitosan. When this crosslinked polymer is used as an adsorbent, a polycyclic organic material present as a mixture in a solution can be selectively adsorbed, desorbed, or separated. The granular polysaccharide polymer having phthalocyanine bonded thereto is excellent not only in the ability to adsorb polycyclic organic materials, but in the ability to desorb the adsorbed polycyclic organic materials. Accordingly, the crosslinked polymer is particularly useful for selective adsorption, desorption/concentration, or separation of polycyclic organic materials, e.g., mutagens, present in a very small amount, for example, in environments, foods, table luxuries, biological samples and can be widely utilized for the qualitative determination, quantitative determination, or removal of mutagens.
摘要:
This invention provides a crosslinked polymer produced by polymerizing one or more crosslinking monomers and bonding, preferably covalently bonding, a phthalocyanine skeleton to the resultant polymer. The degree of crosslinking is 1% or higher. When this crosslinked polymer is used as an adsorbent, a polycyclic organic material present as a mixture in a solution can be selectively adsorbed, desorbed, or separated. The crosslinked polymer having a phthalocyanine bonded thereto is excellent not only in the ability to adsorb polycyclic organic materials, but in the ability to desorb the adsorbed polycyclic organic materials. Accordingly, the crosslinked polymer is particularly useful for selective adsorption, desorption/concentration, or separation of polycyclic organic materials, e.g., mutagens, present in a very small amount, for example, in environments, foods, table luxuries, biological samples and can be widely utilized for the qualitative determination, quantitative determination, or removal of mutagens.
摘要:
The present invention relates to a process by a series of reactions using tetrafluorocyanobenzens as material for producing tetrafluorobenzenemethanols, tetrafluorobenzenecarbaldehyde dialkylacetals and tetrafluorobenzenecarbaldehydes in a high purity and a high yield which are useful as intermediates in the production of cyclopropanecarboxylic acid esters having insecticidal action, and also relates to a novel tetrafluorobenzenecarbaldehyde dimethylacetal.
摘要:
The present invention provides a method for isolating N-phosphonomethylglycine which comprises adding an acid to precipitate salts from an aqueous solution of an alkali metal salt and/or an alkaline earth metal salt of N-phosphonomethylglycine solution to neutralize and adjust the same to a pH of 2.5 or higher, removing the precipitated salts, and adjusting the pH to 2.5 or lower to crystallize N-phosphonomethylglycine. N-phosphonomethylglycine is thus isolated and purified in high purity and good yield.
摘要:
The present invention provides a method for producing N-phosphonomethylglycine which comprises reacting an aminomethylphosphonic acid with glycolonitrile, or formaldehyde and hydrogen cyanide in situ, under an alkaline condition to convert the aminomethylphosphonic acid into an N-phosphonomethylglycinonitrile salt or a mixture of an N-phosphonomethylglycinonitrile salt and N-phosphonomethylglycinonitrile, and then hydrolyzing the product under an acidic condition. Subsequent to a reaction step for the production of N-phosphonomethylglycinonitrile, the reaction product is hydrolyzed by adding thereto an acid in a prescribed amount. Accordingly, the use of a large amount of an alkaline metal hydroxide and the neutralization step for obtaining N-phosphonomethylglycine after hydrolysis, which steps are necessary in a conventional alkali hydrolysis method, are omitted in the present invention.
摘要:
N-acylaminomethylphosphonic acid is prepared from an N-methylolamide compound and a phosphorus trihalide. The starting compounds are mixed and heated in an aprotic solvent in the presence of water in a 0.25 to 2.5 times molar amount relative to the phosphorus trihalide at 60.degree. to 160.degree. C., and the reaction mixture is contacted with water. The N-methylolamide compound is a compound selected from the group consisting of N-methylol-lower alkylamides and N-methylolarylamides. The phosphorus trihalide is preferably phosphorus trichloride. As the aprotic solvent is used one or more of hydrocarbons, halogenated hydrocarbons, ethers, polyethers, nitriles, and aromatic nitro compounds. The mixing may be carried out at a temperature of 60.degree. C. The water present at the initiation of the reaction is in a 1.0 to 1.8 times molar amount relative to the phosphorus trihalide.