2,4-D SALINE-SOLUBLE GRANULE AND PREPARATION METHOD THEREFOR

Disclosed is a 2,4-D saline-soluble granule, comprising components with the following weight percentage: 5-80% 2,4-D salt (calculated as 2,4-D acid), water-soluble packing residue. The 2,4-D saline-soluble granule is excellent at controlling annual or perennial gramineae weeds and certain broadleaved weeds in soybean fields and other Leguminosae fields, such as amaranth, knotweed, goosefoot, nightshade, Xanthium sibiricum, barnyard grass, green bristle grass, crabgrass, glutinous millet, etc. The preparation is an environmentally friendly dosage form, and has the following advantages compared with conventional emulsifiable concentrates, wettable powder and suspension concentrates: free of organic solvents and dust, and easy to measure. Also disclosed is a preparation method therefor. The method process is simple, economical, and safe; no dangerous chemicals are used during the whole production process, so the process is easy to control and operate, and the safety coefficient is high.

PREPARATION METHOD FOR PHENOXYCARBOXYLIC ACID HERBICIDE

PREPARATION METHOD FOR CHLOROPHENOXYCARBOXYLATE

PREPARATION METHOD FOR CHLOROPHENOXYCARBOXYLATE

GLYPHOSATE CHOLINE TECHNICAL PRODUCT AND FORMULATION, AND PREPARATION METHOD THEREFOR

Disclosed are a glyphosate choline technical product and formulation, and a preparation method therefor. The forms may be a water agent or water soluble granules. In the formulation, content of glyphosate choline is 5-95wt%, preferably is 15-90wt%, further preferably is 35-90wt%, and optimally is 55-90wt%, the most optimally is 55-80wt%. The glyphosate choline technical product and formulation have stable physicochemical properties, high water solubility, and are unlikely to be deformed when heated and pressed, and have strong stability. The method for preparing the glyphosate choline technical product is simple and environmentally friendly.

PREPARATION METHOD FOR PHENOXYACETATE

PREPARATION METHOD FOR 2,4-DICHLOROPHENOXYACETIC ACID OR SALT THEREOF

METHOD FOR PREPARING PHENOXY CARBOXYLIC ACID HERBICIDE

A method for preparing a phenoxy carboxylic acid herbicide, comprising: S1, subjecting phenol or o-cresol to a condensation reaction with a chlorocarboxylate under the action of an alkaline substance to obtain a phenoxy carboxylate, wherein the formula of the chlorocarboxylate is ClR1COOR, R1 being a C1-C3 alkylene group or alkylidene group, and R being a C1-C10 alkyl group or C3-C10 cycloalkyl group; S2, subjecting the phenoxy carboxylate to selective chlorination with a chlorinating agent under the action of a first catalyst and a second catalyst to obtain a chlorophenoxy carboxylate, wherein the first catalyst is selected from a Lewis acid, and the second catalyst is a C5-C22 thioether compound, thiazole compound, isothiazole compound, or thiophene compound; and S3, subjecting the chlorophenoxy carboxylate to an acidolysis reaction to obtain a phenoxy carboxylic acid herbicide as represented by formula I, wherein R3 is H, Cl, or CH3. The present invention can improve the product quality ...

PREPARATION METHOD OF PHENOXYCARBOXYLIC ACID HERBICIDES

Disclosed is a preparation method of phenoxycarboxylic acid herbicides. The preparation method comprises the following steps. S1: mixing an anhydrous phenol and a basic substance with a chloro-substituted carboxylic acid ester and performing a one-pot condensation reaction in an anhydrous system to obtain a phenoxycarboxylic acid ester. The chloro-substituted carboxylic acid ester is represented by the formula ClR1COOR, in which R1 is a C1-3 alkanediyl or alkylidene group, R is a C1-10 alkyl group or a C3-10 cycloalkyl group; S2: the phenoxycarboxylic acid ester undergoes selective chlorination with a chlorinating agent in the presence of a first catalyst and a second catalyst to obtain a chloro-substituted phenoxycarboxylic acid ester, in which the first catalyst is a Lewis acid, and the second catalyst is a C5-22 thioether compound, a thiazole compound, an isothiazole compound or a thiophene compound; and S3: the chloro-substituted phenoxycarboxylic acid ester undergoes an acid hydrolysis ...

Generator set dual-start control method and system

The invention relates to a double-start control method and system for a generator set. The control method comprises the steps that a first control system receives an input signal; the first control system outputs an instruction to the second control system according to the input signal; the second control system selects a starting mode according to the instruction so as to start the first starting group and/or the second starting group; the first starting group and/or the second starting group feed/feeds back at least one group of data signals to the second control system, and the second control system exchanges signals with the first control system according to the data signals so as to judge whether the first starting group and/or the second starting group are/is started or not. According to the invention, multiple groups of starting devices can be configured for the engine unit, and different starting modes can be automatically switched, so that the starting groups are detected, the ...

PREPARATION METHOD FOR PHENOXYCARBOXYLATE

Steel slag-based concrete carbon sequestration protective coating as well as preparation method and application thereof

The invention belongs to the technical field of concrete, and particularly relates to a steel slag-based concrete carbon sequestration protective coating as well as a preparation method and application thereof. The steel slag-based concrete carbon sequestration protective coating provided by the invention is prepared from the following components in parts by mass: 40 to 50 parts of steel slag micro powder, 30 to 40 parts of quartz sand, 5 to 10 parts of quick-setting and quick-hardening cement, 9 to 15 parts of calcium supplement, 0.1 to 0.5 part of defoaming agent, 1 to 1.5 parts of thickening agent, 1 to 2 parts of binding agent, 1 to 5 parts of water reducing agent and 30 to 40 parts of water, the total mass part of the steel slag micro-powder, the quartz sand, the quick-setting and quick-hardening cement, the calcium supplement, the defoaming agent, the thickening agent, the binder and the water reducing agent is 100, the steel slag micro-powder is high in binding force with base concrete ...