51results about How to "Achieve cleaner production" patented technology

The invention discloses a comprehensive utilization method of sweet sorghum straw and juice thereof, which comprises the following steps: juicing sweet sorghum straw, separating the juice from straw residues, performing steam explosion of the sweet sorghum straw residues to obtain steam exploded straw and a steam exploded straw eluate; performing enzymatic hydrolysis of the steam exploded straw, mixing with the sweet sorghum juice, controlling the sugar content to be 6%-7%, adding a nitrogen source, performing acetone butanol fermentation to produce acetone, butanol and ethanol; inoculating bacteria into the fermentation residues to produce feed protein; performing decoloration, detoxification, and enzymatic hydrolysis of the steam exploded straw eluate to extract xylo-oligosaccharides. The invention realizes graded utilization of saccharides, cellulose and hemicellulose in sweet sorghum, can produce xylo-oligosaccharides, and can produce fermentation products such as acetone, butanol, ethanol, feed protein and the like through biotransformation. The invention realizes the comprehensive utilization of sweet sorghum straw resources, has no waste material or pollutant discharge during the production, realizes cleaner production, and has good social benefit and economic benefit.

The invention relates to a synthesis and purification method for an alpha-amino acid compound. The synthesis and purification method is characterized by comprising the following steps: (1) adding substituted alpha-amino nitrile or a substituted hydantoin-based compound into alkali M(OH)x or metal oxide MxO, adding water or an alcohol and water mixed solvent, and heating for reaction to obtain alpha-amino acid salt; (2) adding ammonium carbonate or ammonium bicarbonate or introducing carbon dioxide into the solution in the step (1), separating to obtain filter liquor and precipitates MxHyCO3, performing reduced pressure concentration on the filter liquor, and recrystallizing in an alcohol solvent to obtain the alpha-amino acid compound (I). The synthesis and purification method for the alpha-amino acid compound is simple, the yield and purity of the obtained alpha-amino acid compound are high; furthermore, recycling utilization and cleaning production of materials can be realized; the synthesis and purification method is especially suitable for synthesis of the alpha-amino acid compound with high water solubility.

The invention discloses a method for producing an artistic paperboard by taking a commercial wood pulp as a raw material. The method comprises preparing a mixed wood pulp, then preparing a paper pulp, successively adding an internal sizing agent, heavy calcium carbonate and polyacrylamide into the paper pulp, and finally performing calendaring and reeling for obtaining finished paper, so as to obtain raw paper of the artistic paperboard; and preparing a coating, smearing the raw paper with the coating, performing calendaring by a supercalender, and performing rewinding by a rewinder, so as to obtain the artistic paperboard finished product. The beneficial effects comprise that 1, after the raw paper produced from high-quality commercial wood pulp is subjected to coating and calendaring, the surface is fine, printing ink absorption property is moderate, and printing performance is good; 2, the production technological flow does not employ self-made pulp and whitening agents, pollution source is less, and environmental influence is extremely small; and 3, produced sewage is extremely less, and cleaning production and neutral environment-friendly papermaking are realized.

The invention provides a mixed pulp compound papermaking pulp substrate as well as a preparation method and an application thereof. The mixed pulp compound papermaking pulp substrate is prepared from following raw materials in parts by weight: 70-80 parts of bamboo pulp, 5-15 parts of reed pulp, 5-15 pats of cane syrup, 2-8 parts of fluff pulp and 0-2 parts of fly ash. The preparation method comprises the following steps: pulping, preparing the pulp, carrying out high-concentration degritting, grinding the pulp, carrying out low-concentration degritting, carrying out pressure screening, slushing, compounding and making paper with the pulp, drying and the like. The raw materials of the mixed pulp compound papermaking pulp substrate are selected from perennial wild herbaceous plants, processing industrial wastes, and fire coal wastes of power planes and industrial boilers; a product is uniform in texture and smooth in surface; no pollutants are discharged in a preparation process; water for diluting, agitating and conveying can be cyclically utilized; the mixed pulp compound papermaking pulp substrate provided by the invention can be used for producing electric mats and cockroach killing pieces or can be used as an industrial filtering material.

The invention discloses a method for recovering and utilizing titaniferous fine materials. The method mainly comprises the steps of titaniferous fine material forming, formed material roasting, crushing grading and the like. The method has the beneficial effects that the operation of the method for recovering and utilizing the titaniferous fine material is simple; only the processes of forming, roasting, crushing and the like are performed; the investment cost is low; a great number of fine material grade materials can be effectively treated; the utilization value of fine material grade titanium slag or other fine material grade titaniferous substances can be obviously improved. The method provided by the invention has the advantages that in the whole realization process, the cost of the used production equipment is reduced; the byproduct coal gas of the titanium slag furnace can also be effectively used, and the effects of clean production and energy source saving is achieved.

The invention discloses a chemical reaction system for producing oxalic acid diester and oxalic acid as main products by using sodium formate as raw materials. The chemical reaction system comprises a first reaction unit, a second reaction unit and a third reaction unit, wherein the sodium formate is subjected to dehydrogenation reaction to generate sodium oxalate in the first reaction unit; in the second reaction unit, the sodium oxalate is mixed with solvents, then, the oxalic acid is added, the reaction is carried out, and then, the solid and liquid separation is carried out, wherein the solid phase is phosphate, and the oxalic acid diester is rich in the liquid phase; and in the third reaction unit, the oxalic acid diester-rich liquid phase is subjected to distillation separation, then, the oxalic acid diester is respectively subjected to hydrolysis, hydrogenolysis and ammonolysis, and oxalic acid, alcohol, glycol and oxamide are obtained. The chemical reaction system disclosed by the invention has the advantages that the influence on environment is avoided, the environment problems of lead-containing sewage and other waste discharge do not exist, phosphates from sodium ions and with higher additional values are generated, the process separation becomes simple, the implementation is easy, and the production process reaches the requirements of clean production and energy saving environment-friendly type production process.

The invention discloses an approach to recycle waste oil of steel rolling iron scale and its equipment system. It relates to processing technology and equipment of steel rolling sludge, especially the waster oil recycling approach and equipment system of steel rolling iron scale. Character of the invention is that firstly vaporize to remove moisture, then remove waste oil using low-temperature distillation, and finally, reach the target of cleaning iron scale and recycling waste oil of iron scale. The equipment is made up with desiccation dehydration system, microtherm deoiling system and waste oils recycling system. Merits of the invention are that it can avoid soot and water body pollutant, recycle waste oils and clean deoiling iron scale can be used as deep-processing materials.

The invention relates to a preparation method for glucosamine sulfate. According to a technical scheme in the invention, the preparation method comprises the following steps: step 1, dispersing D-glucosamine hydrochloride in an alcoholic solvent; step 2, neutralizing D-glucosamine hydrochloride with alkali; step 3, adding sulfuric acid into a glucosamine solution drop by drop so as to form a salt; step 4, carrying out precipitation and separation; and step 5, carrying out refining by repeatedly washing a solid with a small amount of an organic solvent until no chloride ion is eluted and carrying out drying under reduced pressure, wherein the organic reagent is ethanol, propyl alcohol, acetone or the like with a concentration of 80 to 100%. With the technical scheme, glucosamine sulfate with low sodium or potassium content is obtained.

The invention provides a citric acid mother liquor treatment process, which is characterized in that citric acid mother liquor is treated by coagulant acid and degumming agent, filtered and crystallized again to obtain a qualified product, or the treated mother liquor is further purified through a continuous moving bed simulating process and the treated citric acid mother liquor is transferred into the product at last. By using the embodiment of the technology, the crystallization ratio and the yield rate of the product can be improved and the unqualified liquor amount can be reduced on one hand, and on the other hand, the citric acid mother liquor does not have to be returned to a counteract procedure, which both saves the consumption of calcium carbonate and sulfate acid and achieves the clean production.

A bagasse heating and drying system is composed of a high-temperature flue gas pipe inlet, a high-pressure fan, a flue gas pipe, a bagasse inlet, a discharging valve, cyclone-type fire extinguishers, a cyclone separator, a flue and a circulating high-pressure fan. The high-temperature flue gas pipe inlet is mounted in front of a high-temperature coal economizer, the high-temperature fan is connected with an incoming and outgoing pipe of the high-temperature flue gas pipe, and a bagasse inlet and the discharging valve are mounted above the high-temperature flue gas pipe. A small amount of high-temperature flue gas in front of the coal economizer is utilized to heat and dry bagasse, and the bagasse is enabled to reach high temperature before catching fire and enabled to be fully burnt in the process of burning, so that temperature of a hearth is increased, heat radiation is enhanced, and heat efficiency of a boiler is improved; the flue gas after being dried is drawn by the circulating high-pressure fan into the boiler to serve as disturbing air to be used so as to realize heat balance running of the boiler; balance ventilation is adopted, so that the drying system is enabled to run under a non-blocking state and enabled to realize clean production, energy conservation and emission reduction, and plays an important role in promoting economy development of cane sugar industry and improving enterprise benefit and social benefit.

The invention belongs to the technical field of biological engineering, and specifically relates to a method for extracting protein peptide from poecilobdella manillensis. The method comprises the following steps: disinfection, grinding, coarse filtration, microfiltration, ultrafiltration, alkali dissolution, microwave treatment, centrifugation, precipitation, discoloring, enzymatic hydrolysis, precipitation, microfiltration, ultrafiltration, nano filtration, condensation, and spray drying. A physical method is used to replace a chemical method to separate acidic polypeptide so as to obtain a coarse product of acidic polypeptide; the coarse product can be used to produce Chinese patent medicine containing acidic polypeptide and purified acidic polypeptide, the separation rate is high, the activity can be well protected, no pollution is generated, and clean production is achieved.

The invention discloses a method for detecting moisture, vanadium pentoxide and carbon content in vanadium hexamine. The method comprises the steps of using nitrogen protection to carry out sample pretreatment, and then carrying out moisture measurement, using ferrous ammonium sulfate standard solution drop method to detect vanadium pentoxide content, and infrared carbon-sulfur analyzer to measure carbon content. The invention establishes a drying method for the moisture determination of the hexaamine vanadium sample, a sample dissolution method for the determination of the vanadium pentoxide, and an equivalent correction method for the determination of carbon, and realizes accurate detection of the moisture content of the hexaamine vanadium, vanadium pentoxide and carbon. The method is easy to operate and can meet the needs of the hexamine vanadium production process, quality judgment and business settlement.

A method for recovering valuable elements from blast furnace flocculation dust and sludge, which adopts a combined process of flotation, magnetic separation and gravity separation to process low-grade blast furnace flocculation dust and sludge containing 2-8% zinc to recover valuable elements. element. The specific steps include: firstly grind the blast furnace bag ash, and then use a fine sieve for coarse classification, and then return to the classification operation after grinding the product on the coarse-grained sieve; machine; the graded under-screen products are mixed and then concentrated, and added with chemicals for flotation. The flotation is divided into two roughings and one beneficiation. Zinc raw material final tailings. The invention has the beneficial effects of simple process, low energy consumption and low production cost. The comprehensive recycling effect is good. The selected carbon concentrate can be used as coal injection for steel enterprises, the iron concentrate is directly returned to the pelletizing process, and the final tailings (zinc-rich material) are used for pyrometallurgy to extract zinc oxide.