34 results about "Chlorobenzoates" patented technology

The invention discloses a chlorantraniliprole preparation method. A technical scheme adopted by the invention is characterized in that the chlorantraniliprole preparation method comprises the follow synthetic steps: 1, 2-amino-3-methyl-5-chlorobenzoate synthesis; 2, 3-bromo-1-(3-chloropyridine-2-pyridyl)-1H-pyrazole-5-formic acid synthesis; and 3, chlorantraniliprole synthesis. The invention concretely relates to synthetic methods of the key chlorantraniliprole intermediates comprising 2-amino-3-methyl-5-chlorobenzoate and 3-bromo-1-(3-chloropyridine-2-pyridyl)-1H-pyrazole-5-formic acid. The synthetic method of the pesticide chlorantraniliprole has the advantages of low cost, high yield, strong operability, realization of the industrialized production, and the like.

The invention relates to a synthetic method of o-diphenylphosphinolbenzoic acid. The synthetic method comprises the following steps: taking chlorodiphenylphosphine as a starting material, adding the chlorodiphenylphosphine and an alkali metal to a solvent for cracking to generate diphenylphosphine alkali salt, then adding ortho-chlorobenzoate or ortho-chlorobenzoic acid ether for reaction to generate diphenylphosphine benzoate or diphenylphosphine benzoic ether, and obtaining the o-diphenylphosphinolbenzoic acid after hydrolysis. The solvent is tetrahydrofuran, 2-methyltetrahydrofuran or an ether solvent such as n-butyl ether or 1,4-dioxane and the like, the alkali metal for cracking can be lithium, sodium or potassium, the ortho-chlorobenzoate can be lithium ortho-chlorobenzoate, sodium ortho-chlorobenzoate and lithium ortho-chlorobenzoate, and the ortho-chlorobenzoic acid ether can be ortho-chlorobenzoic methyl ester, ortho-chlorobenzoic acid ethyl ester, ortho-chlorobenzoic acid propyl ester, ortho-chlorobenzoic acid butyl ester, ortho-chlorobenzoic acid pentyl ester and the like. The synthetic method can prepare the o-diphenylphosphinolbenzoic acid above 0 DEG C at normal pressure with safe and stable operation, can save a large amount of energy sources and is suitable for large-scale production.

The invention discloses a method for extracting para-chlorobenzoic acid from ketene wastewater, which comprises the following steps: oxidizing sodium para-chlorophenylmethoxide in wastewater to obtain sodium para-chlorobenzoate, stratifying to separate part of organic matters, neutralizing with hydrochloric acid, crystallizing out para-chlorobenzoic acid, purifying by dissolving organic impurities in the crude product into DMF (N,N-dimethylformamide) and methanol to obtain a refined para-chlorobenzoic acid product, and drying to obtain the product. The purity of the product is greater than 99%, which is higher than that of the para-chlorobenzoic acid in the market.

The invention discloses a preparation method of 2-amino-3-methyl chlorobenzoate. The preparation method comprises the following steps of: (1) adding inorganic acid to 2-amino-3-methyl chlorobenzoate dissolved in organic solvent at the room temperature; (2) cooling the solution to 5 DEG C to 10 DEG C and stirring the solution for 0.1 hour to 1 hours after adding the inorganic acid, and dropwise adding methylation reagent slowly; (3) stirring and reacting for 4 hours to 8 hours at the room temperature after adding the methylation reagent; and (4) filtering the solution, washing the filter cake with water and drying the washed filter cake to obtain the 2-amino-3-methyl chlorobenzoate. According to the preparation method of the 2-amino-3-methyl chlorobenzoate, the methylation reagent and the 2-amino-3-methyl chlorobenzoate are used for carrying out an esterification reaction, so that the reaction process is simple, the operation is easy, the safety is good, the cost is low, and particularly, the purity of the obtained product is higher and the yield is higher, and therefore, the preparation method is very suitable for industrial production. Besides, after the reaction is finished, enough water is used for separating out the product from the reacted materials, so that the yield is further improved; moreover, the separated product is good in color.

The present invention relates to the preparation process of 3-amino-4-cetyl chlorobenzoate. Compound 3-amino-4-cetyl chlorobenzoate is prepared with 3-amino-4- chlorobenzoic acid and cetanol as main material, and tin tetrachloride, stannous chloride or butyl titanate as catalyst, and through solvent reflux dewatering and esterification. The preparation process includes the following steps: setting 3-amino-4- chlorobenzoic acid and cetanol into organic solvent, heating to dissolve and adding catalyst via stirring, reflux dewatering, recovering solvent after reaction and adding refined organic solvent, filtering to obtain solid, re-crystallizing in refined organic solvent and stoving to obtain 3-amino-4-cetyl chlorobenzoate product. The present invention has great production capacity and high product purity, and is suitable for industrial production.

The invention discloses a 2-chloro-benzoate compound which has a novel structure and is shown as the general formula (I), wherein R1 is selected from H or methyl, R2 is selected from H or methyl, and R3 is selected from C1-C6 alkyl or benzyl. When R1 is selected from H and R2 is selected from methyl, carbon atoms connected with R1 and R2 in the general formula are in an S or R structural type. Or the invention provides a compound which contains different contents of S and R structural types. The compound which is shown as the general formula (I) has extraordinary weeding activity after seedling.

The invention relates to a diamond resin honing stone for ultra-precisely machining a cylinder sleeve platform anilox roller and a preparation method thereof. The diamond resin honing stone comprises the following raw materials in percentages by weight: 20-30% of epoxy resin, 5-15% of polyurethane, 2-6% of W7 diamond micron powder, 35-45% of electrolytic copper powder, 5-15% of cerium oxide powder and 4-12% of isobutyl 3,5-diamino-p-chlorobenzoate as a solidifying agent. The preparation method comprises the following steps of: mixing the raw materials according to percentages by weight, pouring and forming to prepare the diamond resin honing stone for ultra-precisely machining the engine cylinder sleeve platform anilox roller. The engine cylinder sleeve platform anilox roller which is precisely honed by utilizing the diamond resin honing stone prepared by the preparation method disclosed by the invention has uniform deep grooves, the uniform width and distance and high platform precision, and an engine cylinder sleeve reaches EU III and IV emission standards.