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).

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.

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.

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

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.

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.

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.

Ecological control method for auriculana