31results about How to "Eliminate acidity" patented technology

A process for preparing a multi-element acidic soil conditioning agent from the alkali dregs and city sludge includes such steps as adding calcium lime to city sludge for stabilizing and disinfecting it, modifying the alkali dregs by (NH4)2HPO4, mixing them together, stacking to obtain compost, drying and breaking.

The invention discloses a catalyst for catalyzing and dehydrating lactate and preparation and application thereof. The catalyst consists of alkali metal dihydric phosphate, grafted hydrophobic group and silica gel. The method for preparing the catalyst comprises the following steps of: grafting the hydrophobic group on the organosilane onto the surface of the silica gel by adopting a grafting method; impregnating the silica gel in aqueous solution of alkali metal dihydric phosphate; and preparing the hydrophobically modified silica-supportedalkali metal dihydric phosphate catalysts through roasting. The catalyst is used for catalyzing and dehydrating the lactate to prepare acrylic acid and acrylic ester. The catalyst makes the lactate highly selectively synthesize the acrylic ester, and can simplify process flow and reduce production cost and consumption of petroleum resources.

The invention discloses a modified phosphogypsum-based concrete prefabricated part and a preparation method thereof. The preparation method sequentially comprises the following steps: S1, modificationof phosphogypsum; S2, preparation of concrete; and S3, preparation of the prefabricated part. According to the method, lime pretreatment is adopted, so that the influence of soluble phosphorus and fluorine on the practical performance of ardealite can be eliminated; the precast concrete component prepared from chemical fibers, additives, concrete raw materials, modified ardealite and the like isexcellent in performance and meets the quality requirements of fabricated building construction.

The invention discloses an allyl chloride epoxidation method for preparing epichlorohydrin. According to the invention, under the existence of a titanium silicon molecular sieve and resin composite modified catalyst, with alcohol as a solvent, allyl chloride and hydrogen peroxide are subjected to an epoxidation reaction, such that epichlorohydrin is produced. According to the invention, a fixed bed reaction manner is adopted, such that a problem of separation difficulty of titanium silicon catalyst powder and a reaction liquid of a traditional slurry reactor is solved. The reaction efficiency is improved. Also, with the modification upon the catalyst, a ring-opening side reaction of the epoxide is eliminated, and product selectivity is improved.

The invention discloses a preparation method of a high-bonding-strength EVA (Ethylene Vinyl Acetate) film for a glass fiber reinforced plastic interlayer, and belongs to the technical field of EVA interlayer glues. GMA (Glycidyl Methacrylate) is subjected to melt grafting, GMA (Glycidyl Methacrylate) contains a strong-activity epoxy group, and a macromolecular coupling agent is used, so that a good reactive compatibilization effect can be achieved in a blending reaction, the elasticity is high, the EVA film is rubbery and includes enoughpolyethylene crystals which play a physical crosslinking point erole, the EVA film has the characteristics of thermoplastic elastomer, large cohesive force, small surface tension during melting and high thermal bonding force to the surface of epoxy glass fiber reinforced plastic, such as a 3240 epoxy board, and further the chemical resistance, the thermal stability, the weather resistance and the electrical performance are excellent.

The invention relates to the related fields of adhesive sticker processes, particularly to a waste gas treatment device for adhesive sticker surface paper production. The device includes a rack, a waste gas treatment box is installed in the rack and is a cylindrical structure, the top of the rack is externally connected to a gas pipeline, a gas conveying pump is mounted on the gas pipeline, a gasinlet hopper is arranged at the top of the waste gas treatment box, the top of the air inlet hopper is connected to a gas conveying end of the gas conveying pump through an air inlet pipe, a heat exchange cavity is disposed on a side edge wall of the waste gas treatment box, a pipeline notch is arranged in the heat exchange cavity, a support frame is installed at the bottom of the rack in a built-in way, a heat exchange pipe is installed on the support frame, the heat exchange pipe is embedded in the pipeline notch in a fit mode, and the heat exchange pipe is a spiral structure and is wound inthe inner cavity of the heat exchange cavity. By means of heat exchange, the device provided by the invention reaches the effects of heat recovery and heat utilization through heat exchange, and thenutilizes neutralization treatment to eliminate harmful substances in waste gas.

The invention discloses a method for processing high humidity vinegar grain resources, which is characterized in that: humid vinegar grains which are pressed and dehydrated enter directly to an incinerator to incinerate; the incinerator is ignited and burned with external energy source; the humid vinegar grains are dried by exhaust fume which is generated by incinerating so that a drying system has enough heat energy to dry enough dry vinegar grains; the dry vinegar grains are fed into the incinerator to incinerate; an igniting system is closed; the humid vinegar grains are dried by smoke gas which is generated by incinerating; and circulation is formed. The invention adopts the exhaust fume of a waste heat boiler to dry the vinegar grains which are pressed. The method for processing high humidity vinegar grains resources has the advantages of turning a waste into a treasure, shortening processing time, and improving greatly processing efficiency without influence of the marketing, is unnecessary to consume new energy source, saves the energy source, removes stink and acidity of the vinegar grains, reduces quantity of air volume, reduces quantity of processing quantity with environmental protection, also provides surplus energy and chemical substances, solves the problem of high salinity, and turns a waste into a treasure.

The invention relates to a method for preparing epoxy chloropropane by using a novel catalyst, mainly aiming at solving the problems that in a preparation process of the epoxy chloropropane, the selectivity of chloropropene is low, and the yield of the epoxy chloropropane is low. The epoxy chloropropane is prepared by using chloropropene and hydrogen peroxide as reaction raw materials, the mass ratio of the hydrogen peroxide to the chloropropene is within a range of (1 to 5)-(1 to 20), the mass ratio of the catalyst to the chloropropene is within a range of (1 to 15)-(1 to 100), the reaction temperature is 35-100 DEG C, and the reaction time is 1.5-3.5h. The novel catalyst can obviously improve the selectivity of the chloropropene and the yield of the epoxy chloropropane, so that the problems are better solved. The method can be used in industrial production of the epoxy chloropropane.

The invention discloses a coffee wet bean circulation fermentation system which comprises a collecting and discharging pool, a uniform feeding device, a circulation cleaning device, a fermentation adjusting pool and a waste water treatment pool, the collecting and discharging pool is arranged on the upper portion of a peeling device, and the peeling device is connected with the fermentation adjusting pool through the uniform feeding device; a circular cleaning device is arranged at a discharge hole of the fermentation regulating tank, and one end of the circular cleaning device is connected with the collecting tank and the wastewater treatment tank respectively; uniform discharging is adopted, coffee beans in the box body are sprayed through spraying equipment on the upper portion, multiple processes of material guiding and discharging, peeling, fermentation, circulating cleaning and waste water treatment are carried out through a discharging pipe on the lower portion, the steps of automatic discharging, feeding, fermentation, guiding out and the like are achieved in combination with independent equipment, and the fermentation efficiency and quality are effectively improved.

The invention discloses an atmospheric pollution treatment instrument. The atmospheric pollution treatment instrument structurally comprises a filter tank, a filter device, an acid removing tower, a connecting pipe, a gas inlet, a gas outlet, sealing valves, hinges, a maintenance door and a handle, wherein the gas inlet is formed in the left side of the filter tank through one sealing valve; the gas outlet is formed in the right side of the filter tank through the other sealing valve; the filter device is arranged in the filter tank; the maintenance door is arranged on the front side of the filter tank through the hinges; the handle is welded on the maintenance door; the filter tank, the gas inlet and the gas outlet are located in the same center line; the gas inlet is connected with the acid removing tower through the connecting pipe. According to the atmospheric pollution treatment instrument, the acid removing tower is arranged, a tower body and a base are located in the same center line, an acid removing liquid enters the acid removing tower and is sprayed to remove acid in air, acidic substances in air are removed, and therefore, corrosion to the atmosphere is reduced.