38 results about "4-Chlorophenoxyacetic acid" patented technology

The invention relates to a determination method for six residual plant-growth regulators in a bean sprout, especially to a method for simultaneous determination of six residual plant-growth regulators in the bean sprout by using gas chromatography-tandem mass spectrometry. Six plant-growth regulators involved in the invention are composed of 4-chlorophenoxyacetic acid, 2,4-dichlorophenoxyacetic acid, naphthylacetic acid, indoleacetic acid, 2,4-D-butyl ester and indolebutyric acid. The method comprises the following steps: 1) sample treatment; 2) determination, wherein gas chromatography-tandem mass spectrometry is employed; 3) drafting of a standard curve; 4) blank test; and 5) result calculation and description. The determination method employs gas chromatography-tandem mass spectrometry for simultaneous determination of the six residual plant-growth regulators in bean sprout; and the method is simple, convenient, rapid, accurate and reliable, and the lower determination limit, recovery rate and precision of the method all accord with requirements.

The invention discloses a synthetic method of 2-methyl-4-chlorophenoxyacetic acid and relates to the technical field of organic synthesis. According to the method, o-methylphenol used as a raw material reacts with sodium chloroacetate under the action of sodium methylate; then, a reaction product is neutralized with hydrochloric acid to obtain an intermediate 2-methylphenoxyacetic acid; and finally, the intermediate is subjected to chlorination with sulphone chloride to obtain a target product 2-methyl-4-chlorophenoxyacetic acid. According to the invention, sodium methylate replaces sodium hydroxide to undergo neutralization. The neutralization reaction is relatively thorough, and there are few by-products, thus being beneficial to raise content and yield of the product. In addition, sulphone chloride is used for chlorination. The reaction is a water-free reaction, and generation of lots of phenolic wastewater is minimized. Thus, the reaction meets requirements of modern green pesticides. In addition, reaction temperature is relatively low, thus reducing energy consumption. In comparison with original technologies, the reaction technology has obvious advantages of high yield, less ''three wastes (waste gas, wastewater and industrial residue)'' and low energy consumption.

The invention discloses a chlorination method for phenoxyacetic acid, which mainly solves the problems of high cost, low yield, poor selectivity and environment pollution of the existing phenoxyacetic acid prepared with the existing chlorination method for phenoxyacetic acid. The chlorination method comprises the following operation steps of: 1. preparing a phenoxyacetic acid solution; 2. carrying out electrolysis; and 3. purifying. The chlorination method has the advantage of simple step, is convenient to operate, is operated at the room temperature and does not need any catalyst so as to lower preparation cost; in addition, the chlorination method has good selectivity, and methyl 4-chlorophenoxyacetic acid, 2,4-dichlorophenoxy aceticaci and 2,4,6-trichlorophenoxyacetic acid can be prepared respectively under different electrolysis conditions with the respective yield of over 90%; and in the chlorination method, chlorine does not serve as a raw material, thereby causing small environment pollution. The chlorination method is mainly used for preparing methyl 4-chlorophenoxyacetic acid, 2,4-dichlorophenoxy aceticaci and 2,4,6-trichlorophenoxyacetic acid.

The invention discloses a preparation method and application of a molecularly-imprinted electrochemiluminescence sensing material based on quantum dot electrochemiluminescence for adsorbing trace 2-methyl--chlorophenoxy acetic acid (MCPA). The preparation method of the sensing material comprises the steps that gold nanoparticles and a CdSe-ZnS quantum dot function material which are functionally modified with sodium 2-mercaptoethanesulfonate and p-hydroxy thiophenol are prepared, the MCPA and the prepared function material is mixed, the surface of a gold electrode is modified with the material through electrochemical polymerization film forming, and an electrode modified with diphenylamine-crosslinked nanogold and a quantum dot network array molecularly-imprinted electrochemiluminescence material is prepared after the MCPA is eluted. The preparation method has the advantages that the quantum dot molecularly-imprinted electrochemiluminescence sensing material is synthesized through one step by adopting an electropolymerization method; the sensing material combines the electrochemiluminescence of quantum dots and the specific recognition of molecularly-imprinted polymers, the defects existing in an existing method for preparing the solid luminescence electrode are overcome, and the wide application prospect is achieved.

The invention relates to the field of pesticide preparations and discloses a herbicide composition. The herbicide composition is formed by clopyralid and methyl-4-chlorophenoxyacetic acid in a weight ratio of (1:2)-(1:10). The invention provides a herbicide composition preparation. The active ingredient of the preparation is formed by the herbicide composition. The herbicide composition and the conventional auxiliary materials can be prepared into the herbicide composition preparations such as water aqua, soluble powder, soluble granules, wettable powder or water dispersible granules according to the known methods. The herbicide composition is formed by compounding clopyralid and methyl-4-chlorophenoxyacetic acid, expands the herbicide controlling spectrum, can simultaneously control most weeds in the wheat fields, enhances the broad leaf weed control effect, simultaneously has the advantages of long use age, safety to later crops, long duration and environmental safety and can be widely applied in the agricultural field.

The invention discloses a production process of 2-methyl-4-chlorophenoxyacetic acid. The production process comprises the following steps: carrying out the procedures of perborate formation, condensation, chlorination, salt formation and the like on o-cresol, chloroacetic acid, dichloroethane and the like served as raw materials, recovering o-cresol by external circulation rectification under vacuum, and recycling o-cresol and water; performing reverse chlorination with an external circulation solvent to prepare 2-methyl-4-chlorophenoxyacetic acid. By adopting the production process, the chlorination efficiency is increased effectively, so that no waste water is discharged in production, chlorine gas consumption and industrial organic waste residue production are reduced, and green production is realized. The production process has a good social benefit.

The invention discloses a method for producing 2-methyl-4-chlorophenoxyacetic acid esters. 2-methyl phenoxyacetic acid is reacted with chlorine introduced into an alcoholic solvent (corresponding to the alcoholic part of an ester target product) to form finished products of the 2-methyl-4-chlorophenoxyacetic acid esters in the presence of phenothiazine and dimethylamino pyridine catalysts. The 2-methyl phenoxyacetic acid is reacted in a reaction kettle, and the finished products of the 2-methyl-4-chlorophenoxyacetic acid esters can be directly produced without separation of the intermediate 2-methyl-4-chlorophenoxyacetic acid. The total yield of the finished products of the 2-methyl-4-chlorophenoxyacetic acid esters is improved to over 92 percent, and the content of effective ingredients is improved to over 93 percent.

The invention relates to the technical field of herbicides and particularly relates to a method for producing esters of 2-methyl-4-chlorophenoxyacetate. The method comprises the following steps: adding chloroacetic acid to a reactor, and dropwise adding a 80% sodium carbonate solution to perform neutralization reaction to generate sodium chloroacetate; adding o-cresol to another reactor, dropwiseadding a 30% sodium hydroxide solution to perform reaction to generate sodium o-cresolate, and after the reaction is completed, performing thermal insulation treatment; and dropwise adding sodium chloroacetate to the sodium o-cresolate reactor through a metering tank, and performing condensation reaction to generate sodium o-phenoxyacetate and the like. The method provided by the invention has theadvantages that the cost of the product is low, the product is environmentally friendly, the technology is advanced and mature, and the safety operability is high; the total yield of esters of 2-methyl-4-chlorophenoxyacetate is greater than or equal to 93%; and the product does not contain dioxin.

The method provides a method of cultivating yellow needle mushrooms in a bottle. An adopted culture medium comprises following components in parts by weight: 10 to 15 parts of lemon peel, 5 to 8 partsof sugarcane, 5 to 10 parts of hotbed chives, 3 to 6 parts of millet flour, 3 to 6 parts of pumpkin, 0.5 to 1 part of sodium chloride, 2 to 3 parts of silkworm chrysalis powder, 0.3 to 0.5 part of yeast powder, 0.5 to 1 part of tomato extract, 0.3 to 0.5 part of paclobutrazol powder, 0.2 to 0.4 part of 4-chlorophenoxyacetic acid powder, 3 to 5 parts of chitosan, 0.5 to 2.5 parts of magnesium carbonate, 20 to 25 parts of trehalose, 1.3 to 9.5 parts of nano calcium carbonate, and 0.2 to 0.8 part of lauryl sodium sulfonate. According to the method, hotbed chive is adopted. Hotbed chive is rich in proteins, sugar, calcium, iron, phosphor, vitamin A, vitamin B2, vitamin C, nicotinic acid, glycosides and amaroid, has the functions of dispelling coldness and eliminating stasis, enhances the physical strength, and promotes the appetite.

The invention discloses a root resistant agent for production of a root resistant material and a preparation method of the root resistant agent. The root resistant agent is prepared from dimethyl tetrachlorophenoxypropionic acid, polyethylene glycol, polyoxyethylene lauryl ether, polydimethylsiloxane, nonylphenol polyoxyethylene ether, ethyl alcohol and 4-chlorophenoxyacetic acid. According to the preparation method, dimethyl tetrachlorophenoxypropionic acid, 4-chlorophenoxyacetic acid and absolute ethyl alcohol are mixed, added to a reaction kettle and subjected to reflux under catalysis of p-Toluenesulfonic acid; then polyethylene glycol, polyoxyethylene lauryl ether, polydimethylsiloxane, nonylphenol polyoxyethylene ether and ethyl alcohol are added, stirred sufficiently and left to stand for reaction; a product after the reaction is taken out and cooled naturally. The root resistant agent has the functions that when a plant root system is contacted with a waterproof material containing the root resistant agent in a growth process, the plant root system is inhibited and expelled, so that the plant root system is prevented from growing downwards continuously, accordingly, the penetrating damage of the plant root system to a waterproof layer is reduced, the completeness of the waterproof layer is guaranteed, and the service life of the waterproof layer is prolonged greatly.

The invention relates to a compound herbicide containing bentazone, methyl-4-chlorophenoxyacetic acid and triclopyr or fluroxypyr. The compound herbicide is characterized by comprising main effectiveingredients A, B and C, wherein A is bentazone, B is methyl-4-chlorophenoxyacetic acid and C is triclopyr or fluroxypyr; the weight ratio of A, B and C is (1-100):(1-100):(1-100), preferably, (1-60):(1-50):(1-20) and more preferably, (1-50):(1-20):(1-20). The compound herbicide is used for controlling sedge weed and broadleaf weed for treatment of post-emergence stems and leaves in paddy fields, sugarcane fields, uncultivated areas and the like.

The invention provides an orange pedicel drop resisting preparation which is prepared from the following ingredients in parts by weight: one part of 2-methyl-4-chlorophenoxyacetic acid or 2-methyl-4-sodium chlorophenoxyacete or 2-methyl-4-amine chlorophenoxyacete, 10-20 parts of glycerinum and 40-50 parts of polyoxyethylene-8-octyl phenyl ether-100 (triton X-100). The orange pedicel drop resisting preparation is used for preventing drop of orange fruits before harvesting, and fruit drop before harvesting can be reduced by 64.1-87.4 percent. The preparation has a good effect of preventing pedicel drop of stored orange fruits and can be used for reducing the pedicel drop of the stored fruits by 94-100 percent.

The invention discloses a preparation technology of high-purity 2-methyl-4-chlorophenoxyacetic acid, comprising the following steps: (1) combining outer circulation rectification under vacuum and liquid-liquid layering and reusing ortho-cresol in sodium o-cresolate; (2) preparing 2-methyl-4-chlorophenoxyacetic acid by outer cycling solvent-process reverse chlorination; and (3) conducting coiled tubing preparation of 2-methyl-4-chlorodimethylamine salt. COD value of water during the treatment process is lower than 100 ppm, there is almost no loss of extraction absorbents and the extraction absorbents can be recycled; and by resource treatment of tail gas, annual output of 0.5 ton of dichloroethane with purity being 98% and above and 0.24 ton of ortho-cresol with purity being 97% and above is achieved.

The invention discloses a 2-(4-methoxyphenyl) propionic acid and application of a salt compound thereof the same in growth of rootless sprouts. The 2-(4-methoxyphenyl) propionic acid and the salt compound thereof can promote growth of stems of the sprouts by inhibiting growth of roots and root hares of the sprouts, so the 2-(4-methoxyphenyl) propionic acid and the salt compound thereof can raise the edible ratio and the appearance of the sprouts. According to the invention, a problem that the germination rate of the soybean sprouts quickly decrease along with the storage time of soybeans when 6-benzyladenine and sodium parachlorophenoxy are used for producing soybean sprouts can be solved, the above problem is greatly unfavourable for production of soybean sprouts, and at the same time, problems that soybeans which do not sprout causes reduction of yield of sprouts or make soybeans easily rot to cause great loss of production of sprouts can be solved.