Clean process method for preparing high-purity glyphosate from glycine

The invention relates to an environment-friendly clean process method for synthesizing high-purity glyphosate by a glycine method. The invention is characterized by comprising the following steps of: carrying out synthesis reaction on the excessive glycine which is used as a starting material and depolymerized paraformaldehyde methanol solutions to obtain a methanol solution as an intermediate; making the reaction solution react with dimethylphosphite; dewatering mixture of recovered methanol by desolution and triethylamine and directly using; carrying out acidolysis on precipitates in the presence of hydrochloric acid to obtain a glyphosate reactant system and methyl chloride by-products; carrying out treatment including purification, crystallization, filter, product drying and the like on the glyphosate reactant system to obtain high-purity raw glyphosate powder; and crystallizing by using the mother solution in the purification process for the glyphosate reactant system to obtain products ...

River crab flavour oil and its preparation method

The present invention relates to a river crab flavouring oil, and is characterized by that it uses the edible portion of river crab and pork fat as raw material, mixes them and boils them, and makes them into paste-like body, said paste-like body also can contain the auxiliary materials of edible salt and fresh ginger. In the flavouring oil the edible salt content and fresh ginger content are respectively 3% and 5%, and every 500g of river crab flavouring oil contains edible portion of 2-3 river crabs (every river crab is 50-100g).

Clean production method for continuously synthesizing hydantoin

... * An environmentally-friendly clean production method for continuously synthesizing hydantoin comprises the following steps: reacting an initial raw material hydrocyanic acid with formaldehyde to generate hydroxyacetonitrile, reacting hydroxyacetonitrile in a carbon dioxide and ammonia water system through a continuous reactor to obtain an aqueous solution of hydantoic acid, carrying out acid hydrolysis to obtain hydantoin crystals, and purifying to obtain a highly pure hydantoin product. The combined continuous reactor is adopted to synthesize hydantoin, so the device investment is highly effectively reduced, and the investment efficiency is improved by times; automatic control is very conveniently controlled, the continuity and the stability of production are well guaranteed, the labor cost is saved, and the safe production operationality of the whole process is guaranteed; generation of harmful impurities is well inhibited, decomposition and polymerization of hydroxyacetonitrile and ...

Ecological control method for auriculana

The invention relates to an ecological control method of Radix snails, which includes the aspects as follows: organism manipulation: herring and grazing snails are cultured in the water according to the principle of the food chain; the depasturing of water fowls: water fowls which can graze snails are farmed, the water level is regulated above the height of a sunken plant before the depastruring,thus the water fowls can not graze the water weed; ecological harvest: 8 am to 10 am and 16 pm to 18 pm of every day, the snails are netted for once respectively based on the habit of the radix snails floating on the water surface. The aforesaid aspects can be freely picked once or be freely combined. The invention can effectively control the quantity of the radix snails, preserve the balance of the sunken plants in the eutrophication water and have important significance on the ecological recovery in the eutrophication water. The invention has the advantages of reliable technique, simple andeasy ...

Method for applying regenerated circulation of fluid-bed catalytic hydrogenation catalyst

The disclosed method is used for recovery, regeneration and cyclic application of Cu-Cr hydrogenation catalyst. The liquid mixture produced after the fluid-bed hydrogenation reaction is passed through centrifugal separation, the oblained filter cake is the recovered catalyst, the filter cake is regenerated with basic regenerating liquid, and the regenerated catalyst is obtained through centrifugeand water washing. The finished product catalyst is obtained through drying, grinding and activating, and can be repeatedlycircularly applied. The total regenerating rate is over 80%, and the resource is economize and the pollution is decreased.

Technique for breeding stage-5 young crab in hot house

A technique for breeding young Eriocheir sinensis in hot house features high survival rate. It includes retaining water, regulating temp, controlling water quality and preventing diseases, and is suitable for the north of China.

Purifying simulation method for heavy-eutrophic water bodies by using biomembrane meshes

The invention provides a purifying simulation method for heavy-eutrophic water bodies by using biomembrane meshes. The simulation method comprises the steps of water body preparation, meshes laying, ecology simulation and data acquisition. The meshes laying is characterized in that meshes are rolled to spiral screw surface, screw surfaces can not mutually block the light and are paved in each barrel, the lower part of the screw surface is inserted in a deposit with depth by 2-3cm, the meshes are fixed in the deposit; the specification of the meshes is 40*600cm, aperture size is 2.5mm; and the meshes selects polyethylene or nylon or glass fiber meshes. The accurate purifying simulation of the heavy-eutrophic water bodies by using biomembrane meshes is realized, the purifying method for heavy-eutrophic water bodies by using biomembrane meshes is obtained, and the method has the characteristics of safety and low cost.

Simulation method for promoting growth of submerged plants by controlling suspension of sediments by using filter feeders

The invention provides a simulation method for promoting the growth of submerged plants by controlling the suspension of sediments by using filter feeders. The method comprises the following main technical points: by taking the density of corbicula fluminea and the density of crucian as design factors, five treatment groups are set, i.e. 1 crucian (5g/m<2>) + 0 corbicula fluminea (reference), 1 crucian (5g/m<2>) + 40 corbicula fluminea (150g/m<2>), 1 crucian (5g/m<2>) + 160 corbicula fluminea (570g/m<2>), four crucian (20g/m<2>) + 40 corbicula fluminea (150g/m<2>), and four crucian + 160 corbicula fluminea (570g/m<2>); and the simulation method comprises the technical schemes of water environment preparation, pre-experiment sampling, corbicula fluminea and crucian adding experiment, data acquisition, and the like, and is used for simulating that filter feeders control the suspension of sediments so as to promote the growth of submerged plants. The method has the advantages that through ...

钯-炭低压催化加氢生产对苯二胺方法

A process for preparing p-phenyldiamine by low-pressure catalytic hydrogenation includes diazotizing phenylamine, coupling, translocating to obtain p-aminoazobenzene, catalytic hydroreducing reactionat 60-180 deg.C under 0-3 MPa by use of Pd-C hydrocatalyst containing 3-8% Pd to obtain p-phenyldiamine and phenylamine, separating and purifying. Its advantages are low cost, high output and no environmental pollution.

Method for culturing nuisanceless lefteye flounder

A method for culturing the lefteye flounder without environmental pollution includes such steps as filling fresh water in pool, immersing for a certain time, disinfecting, flushing several times, filtering, depositing and disinfecting seawater, filling it in the pool, culturing the fry of bastard halibut in the pool, feeding the granular bait, and regularly exchanging water and applying medicine.

Simulation method for removing submerged plant by using filter feeder

The invention provides a simulation method for removing a submerged plant by using a filter feeder. The technical key point is characterized in that corbicula fluminea density is an influence factor of the experiments, four groups are set for processing, which are a contrast group, a low density set, a medium density group and a high density group. The density is set by referring natural abundance of Taihu Lake corbicula fluminea, the simulation method comprises steps of deposit preparation, lake river preparation, tape grass preparation, addition in the tape grass experiments and sampling, and the submerged plant in the nutrition water body can be simulated for recovery. The method is capable of promoting the submerged plant growth and has important meaning for ecological recovery of the nutrition water body. The method has the advantages that accurate simulation of the submerged plant can be realized, technology is reliable and easy to operate, cost is low, submerged plant in the nutrition ...

Simulation method of improving water quality of eutrophic water body with bio-membrane nets

The invention provides a simulation method of improving water quality of a eutrophic water body with bio-membrane nets, wherein the simulation method includes preparation of a water environment, arrangement of the nets, ecologic simulation and data acquisition. In the arrangement of the nets, each net is 20*40 cm in specification and is made from polyethylene, wherein the diameter of meshes in the net is 1-2.5 mm. The number of the nets is arranged in a manner of 6/barrel as a high-density group, 2/barrel as a low-density group and 0/barrel as a control group without the nets respectively. The simulation method achieves accurate simulation of improving water quality by the bio-membrane nets. The invention discloses the method of improving water quality by the bio-membrane nets. The method is safe to perform and low in cost.

Method for applying regenerated circulation of fluid-bed catalytic hydrogenation catalyst

Simulation method for restoring benthic algae employing filter feeder

The invention provides a simulation method for restoring benthic algae employing a filter feeder. The method comprises the following technical main points: with river clam density as an influencing factor of an experiment, setting groups of treatments, which are respectively a control group, a low-density group, a medium-density group and a high-density group, and setting the natural abundance of taihu river clam by the density. The simulation method comprises the following technical designs: preparation of sediments, preparation of lake water, preparation of a benthic algae collection method, simulation experiment and sampling, so that restoration of the benthic algae in eutrophic water bodies is simulated. According to the method, growth of the benthic algae in the eutrophic water bodies can be promoted; the method is of significance in ecological restoration of the eutrophic water bodies; the method has the advantages that accurate simulation of restoration of the benthic algae with ...

Flexible intercepting and guiding device and method for lake pollutant

The invention discloses a flexible intercepting and guiding device and method for lake pollutant. The device comprises a fixed enclosure and a flexible enclosure. The fixed enclosure is arranged in water of a shoreside of a water source needing to be protected, and a notched pollutant collecting and processing area is defined by the fixed enclosure or the fixed enclosure and the shoreside. The flexible enclosure is connected to the notch side of the pollutant collecting and processing area, the pollutant of the water source needing to be protected is guided to enter the pollutant collecting and processing area, and under the normal state, the flexible enclosure is folded and stored underwater. The enclosure intercepting technology, the enclosure guiding technology and the centralized pollutant processing technology are integrated, the pollutant is fast intercepted and guided in a flexible mode on the basis of not damaging the waterscape and the water continuity, the pollutant is made to ...

Method for removing settled organism on surface of submerged plant by using grazer

Method for removing settled organism on surface of submerged plant by using grazer

Method for purifying rich nutritive water

The method of purifying entrophic water purifying method includes planting floating vegetation common water rathathinth to absorb entrophic salt, raising goose to eat partial common water rathathinth and maintain common water rathathinth covered area accounting for 20-70 %, and raising fish to eat plankton, so as to constitute one floating vegetation-goose-fish system. The method can purify water while producing goose and fish.

Method of mixed raising large-mouth sucker in crab pond

The invention provides a method of polyculture for mullet in crab pond for improving aquiculture economic results. When the polyculture density of mullet is 750-1500 (fish)/hm2, no need of spreading fish fooder, no negative impact on crab growth, and thus raising aquiculture economic gains over 30%.

Process for producing p-phenylene diamine by low pressure catalytic hydrogenation

The process for preparing p-benzenediamine as raw material of dye industry includes reaction of aniline, hydrochloric acid, sodium nitrite and sodium hydroxide with stirring in glass lined reactor to form p-amino azobenzene, catalytic hydrogenation-reduction reaction to produce raw p-benzenediamine and aniline, refining p-benzenediamine and recovering aniline through separation, distilling and catalyst separation. It features high total yield up to 85%, less pollution and low cost.

Cultivation pond submerged plant dwarfing method and application thereof

The invention relates to the technical field of environmental protection, in particular to a breeding pond submerged plant dwarfing method and application thereof. The breeding pond submerged plant dwarfing method comprises the following steps that 1, submerged plant seedlings are planted in a breeding pond, and the breeding pond where plants are planted is obtained; (2) sequentially splashing chlormequat chloride, paclobutrazol and indazole-naphthylacetic acid into the culture pond for planting the plants to perform dwarfing treatment; the pouring time of the chlormequat chloride is 28-32 days when the submerged plant seedlings are planted; the spraying time of the paclobutrazol is 35-42 days when the submerged plant seedlings are planted; the splashing time of the indazole-naphthylacetic acid is 38-46 days when the submerged plant seedlings are planted. According to the method, the submerged plants are dwarfed without inhibiting photosynthesis and growth of the plants, and the method ...

Clean process method for preparing high-purity glyphosate from glycine

Aquatic vegetation recovery method in enriching shallow lake

Recover hydrophytes in the nourishment saturated fleet lake and rivers. The character is plant the water chestnut. Factors of cultivate: 1) choose of Xiaobai chestnut, shaobo chestnut, shajao chestnut to resist the wind and waves, breed of good tenacity. 2) The water in the lake is still and closed. The depth is 1 to 2 meters not more than 4 meters. The mud under water is fertile and contain high septic. The sullage is 0.2 meters depth. 3) The way of cultivate include chestnut seed, sow and sprout sow. Use them separate or use them in the same time is the way. Water chestnut should preserve from wind and waves.

Method for recovering aquatic ecology system of nutrition-enriched water of lake

A method for restoring the aquatic ecosystem of nutrient enriched water in lake includes such steps as applying the fish chemical to the water for killing fish, applying oxidizing material after 7-10 days while stirring for 3 days, and sowing the Daci algia or transplanting its plants after 10-15 days.

Simulation method for negative effects caused by controlling juvenile fish outbreak by using filter feeding organisms to control ecological rehabilitation project

The invention provides a simulation method for negative effects caused by controlling juvenile fish outbreak by using filter feeding organisms to control an ecological rehabilitation project. The simulation method comprises the following steps: preparing sediment, preparing lake water, adding corbicula fluminea and carps to start an experiment and sampling, wherein the density of the added corbicula fluminea and carps is corbicula fluminea density treatment (0, 60 and 180) and is converted into the unit area biomass (namely 0, 214g/m<2> and 643g/m<2>); the density of the carps is (1 and 3) and is converted into the unit area biomass (namely 4.3g/m<2> and 12.9g/m<2>). According to an experiment biological method adopted by a biological principle, the simulation of the negative effects caused by controlling the juvenile fish outbreak by using the filter feeding organisms to control the ecological rehabilitation project is accurately realized; a biological operation principle is utilized and ...

Process for environmental protecting cleaning producing high pure methoxy (ethoxy) methylene (ethylene) malonic ester

An environment protection type process for preparing the high-purity methoxy (ethoxy) methylene (ethylene) malonate from hydrocyanic acid or acetonitrile, alcohol and malonate includes such steps as reaction between hydrocyanic acid or acetonitril and anhydrous alcohol under existance of hydrogen halide to obtain inter mediate, reacting on malonate to obtain coarse product, and rectifying by distilling.

Simulation method for improving eutrophic water body quality by aufwuch-snail compound system

The invention provides a simulation method for improving eutrophic water body quality by an aufwuch-snail compound system. The simulation method comprises water environment preparation, substratum layout, snail layout, ecological simulation and data collection; the substratum layout comprises the steps that polyethylene meshes are curled to be spiral and are spirally laid in a experimental barrel without light blocking among the helicoids, and the lower parts of the meshes are inserted into sediment by 2 to 3 cm to enable the meshes to be fixed in the sediment with the density of 8.0 to 12.0 square meters of one polyethylene mesh per square meter of a water surface, and bellamya with the shell length of 1.6 to 1.8 cm and the weight of 1 to 1.5g are put in the experimental barrel with the density of 200 to 500g per square meter of the water surface. Accurate simulation for improving water quality by the aufwuch-snail compound system is realized, and a water quality improving method by the ...

Simulation method for controlling biological disturbance effect of water earthworms by using benthic algae

The invention provides a simulation method for controlling the biological disturbance effect of water earthworms by using benthic algae. The simulation method comprises a water environment preparation step, a benthic alga treatment step and a water earthworm treatment step, wherein the benthic alga treatment step comprises the following steps: fixing polyethylene meshes with the same area (154cm<2>) required for experiments on a fishing net, paving the fishing net on the surfaces of settlings in a eutrophic shallow water body on the bank of the Taihu lake, ensuring that the finishing net is pulled, taking out benthic algae to put into the experiments when the chlorophyll content of the benthic algae on experimental meshes reaches 4-6mu g/cm<2>, and paving the benthic algae on the settlings. According to the simulation method provided by the invention, the accurate simulation for controlling the biological disturbance effect of the water earthworms by using the benthic algae can be achieved ...

河蟹调味油及其制作方法

... 河蟹调味油，其特征是以河蟹的可食部分与猪油混合熬制成的膏状体，膏状体中还含有食盐，生姜等辅料，食盐与生姜在河蟹调味油中占的重量分别为3％及5％，每500g河蟹调味油中所含河蟹为2-3只(每只为50-100g)的可食部分。 ...

Environmentally-friendly clean technologic production method of highly pure hydantoin

The purpose of the invention is providing an environmentally-friendly clean technologic production method of highly pure hydantoin. The environmentally-friendly clean technologic production method of highly pure hydantoin comprises the following steps: reacting an initial raw mateiral hydrocyanic acid with formaldehyde to generate hydroxyacetonitrile, reacting hydroxyacetonitrile in a carbonated water system containing ammonia to obtain an aqueous solution of hydantoic acid, carrying out acid hydrolysis to obtain hydantoin crystals, and purifying to obtain a highly pure hydantoin product. The method effectively avoids decomposition and polymerization of hydroxyacetonitrile, well inhibits generation of harmful impurities, realizes a high yield, and allows the purity of the obtained product to be very high; the method reduces the device investment, and well guarantees the operation safety of the whole process; hot water dissolving, heat treatment and hot filtration are adopted in the purifying ...

Ecological control method for auriculana