44results about How to "Improve environmental pollution" patented technology

The invention relates to a new method for generating terephthalic acid and glycol from chemical degradation of waste polyester (PET), thus realizing the recycling of PET material. The method is characterized in that a hydrolysis reaction is carried out at the temperature of 100-190 DEG C, with ionic liquid of chloride 1-butyl-3-methylimidazole, chloride 1-allyl-3-methylimidazole, chloride 1-phenmethyl-3-methylimidazole, and the like, as reaction media which are easy to be repeatedly utilized, and acid functionalized ionic liquid of 1-methyl-3-(3-sulfo-propyl) imidazole hydrosulfate and 1-methyl-3-(3-sulfo-butyl) imidazole hydrosulfate, and the like, as catalyst. After the reaction, water is added to precipitate precipitation; then the liquid is filtered; glycol and ionic liquid are recycled after the filtrate is distilled and separated; the recycled ionic liquid can be directly reused without any treatment. Filter mass is dissolved with sodium hydroxide solution and then is filtered to remove unmodified PET and other insoluble impurities; the obtained filtrate is acidulated until the precipitation is precipitated, then filtered and dried to get the product terephthalic acid with yield coefficient over 90 percent. Compared with the traditional method, the new method for generating terephthalic acid and glycol from chemical degradation of waste polyester is characterized in that: (1) problems in background technology of consumption of a great deal of high concentration inorganic strong acid / strong alkali and incapacity to be recycled and utilized, and the like, are overcome; and (2) owing to the adoption of ionic liquid which has certain solubility for PET as the reaction medium and catalyst, on one hand, the reaction conditions are alleviated; on the other hand, the ionic liquid can be repeatedly utilized, thus obviously improving problems of equipment eroding and environmental pollution.

An environment-conservative fuel economizer includes a hollow tubular member and at least one ring member. The tubular member has an internal surface forming a reduced neck section. The ring member is mounted to an end of the tubular member. The ring member forms a plurality of cut-off slits, which defines a plurality of deformable leaves. The neck section of the tubular member forms a flow-accelerating passage, which increases speed of air flow passing therethrough to induce secondary combustion. The leaves are allowed to selectively expand / contract to effect complete combustion and reduce pollution. The fuel economizer is installed between an automobile air filter and engine air-intake tube to use the suction force induce by air intake of cylinder to draw in air so that the mixture density of air and atomized fuel is intensified to effect complete combustion of fuel and enhance instantaneously engine torque and reduce fuel consumption.

The invention provides a dual-purpose fertilizer capable of being sprayed onto leaves and washed at roots as well as a preparation method and application of the fertilizer, belonging to the technical field of fertilizers. The dual-purpose fertilizer comprises 0.1-3 parts of animal amino acid, 1-20 parts of humic acid, 1-20 parts of urea, 1-20 parts of monoammonium phosphate, 1-20 parts of potassium persulfate, 0.3-3 parts of zinc sulfate, 0.1-2.5 parts of manganese sulfate, 0.1-0.8 part of boric acid, 0.1-0.3 part of sodium molybdate, 0.1-1 part of magnesium sulfate, 0.1-0.3 part of compound sodium nitrophenolate, 0.3-20 parts of ferrous sulfate, 0.1-0.5 part of copper sulfate, 0.1-0.3 parts of citric acid, 0.3-3 parts of ammonium citrate, 0.1-0.3 part of vitamin B, 0.1-0.3 part of sodium selenite, 1-20 parts of methylcellulose, 1-20 parts of a drought resistant agent and 1-30 parts of water. By applying the dual-purpose fertilizer provided by the invention for planting tomatoes, the yield is increased by 8.4-12.26% compared with a control group.

The invention relates to a method for preparing an animal feed additive from waste diatomite and application of the animal feed additive.The method includes: drying dewatered waste diatomite with solid content higher than wt20% and water content being wt70%-80% at 100-200 DEG C for 20-35h to control the water content below wt5%; using grinding equipment for grinding the dried diatomite into particles smaller than 100-mesh particles; adding according to a ratio of 1%-15% of the weight of feeds for livestock and poultry.Technical simplicity in production, sufficient raw material resources and low product cost are realized; the food safety problems caused by drug residues and drug resistance of pathogenic microorganisms can be effectively avoided, quality and output of livestock and poultry are improved, raising cost is reduced, absorption and appetite of animals can be promoted, and disease-resistant immunity is improved; the problems of environment pollution and residues caused by adoption of chemical insecticides in the breeding industry are effectively improved, and people's life quality is improved.

The invention relates to a feed additive prepared from diatomite. Diatomite is taken as a raw material, and after being purified and dried, is pulverized into powder having a particle size range of 20-570 microns. The pulverized powder has a SiO2 content of 35-90%, a water content of 1-15%, and a pH value of about 7. The pulverized powder is added into animal feed and has a general use amount being 0.05%-10% of a total feeding amount. An addition amount of the pulverized powder added into the feed can be adjusted according to the type of a fed animal. The feed additive has characteristics of abundant resources, low cost, and simple manufacture, can improve the nutritional quality of the feed, and can increase the use efficiency and nutrient digestion rate of the feed. The feed additive is particularly suitable for being added into energy feed instead of a main material of corn, so that feed grain is saved, and the production cost is reduced.

The invention discloses a high-alkalinity pellet for blast furnace iron making and a production method thereof and belongs to the technical field of ferrous metallurgy. The high-alkalinity pellet for blast furnace iron making is prepared from the following raw materials of concentrate powder, refining slags and bentonite, and specifically from the components in a percent by mass, namely 60-76% of the concentrate powder, 22-38% of the refining slags and 1.5-2.5% of the bentonite. The production method of the high-alkalinity pellet comprises the following steps: preparing the raw materials, forming green pellets, preheating the green pellets, roasting the green pellets and cooling the pellets. By using the concentrate powder and the refining slags as the raw materials, the alkalinity of the qualified pellets which are produced is higher than 2.0, the high-alkalinity pellet can be absolutely used as a main furnace raw material instead of high-alkalinity sintered ore, the inner consumption of the slags is realized, and waste stacking and polluting problems are solved; when pellet production and slag treatment cost is reduced, energy consumption and pollutant emission can be reduced; and the produced pellets are high in compressive strength, low in S content and great in metallurgic performance.

A high compressive strength silica mortar to be used for the installation of constructs such as building inside and outside walls, the road pavement, a slope and planting trees in the roof and manufacturing method thereof are provided. The high compressive strength silica mortar is formed of 30 to 60 wt % of silica, 40 to 70 wt % of blast furnace slag, and the 15 to 35 weight parts of polycondensation regulator for 100 weight parts of dry mortar powder of these silica and blast furnace slag, and is solidified by generating C—S—H, C-A-H, amorphous Geopolymeric Matrix{Al2O3.mSiO2.nM2O.xH2O(M=K,Na,Ca)} and Zeolite in the mortar. In particular, the high compressive strength silica mortar exhibits the compressive strength of 70.0 MPa or more by vibration forming and curing for 12˜48 hours at 25 to 80° C. before removal of form and aging for 28 days, and can save energies because a firing process is not required. Accordingly, the high compressive strength silica mortar has excellent properties compared with conventional cement concretes or polymer cements, and further shows high compressive strength in initial stage, which could not be generated in such products.