42results about How to "Low leaching temperature" patented technology

The invention belongs to the field of hydrometallurgy and inorganic chemical industry, and particularly relates to a method for extracting manganese from low-grade high-silicon manganese ore containing manganese silicate minerals. The method comprises the technological steps as follows: pretreatment: adding concentrated sulfuric acid to high-silicon manganese ore powder containing 30%-50% of the manganese silicate minerals for aging treatment; leaching: a, adding a pretreated product to water for leaching and separation to obtain a manganese leachate 1 and leached residues; b, adding high-silicon manganese ore to the manganese leached liquid 1, and performing separation to obtain a manganese leached liquid 2 and a solid-phase leached product; treatment of the solid-phase leached product: mixing the solid-phase leached product with concentrated sulfuric acid for aging treatment, and performing separation to obtain a manganese leached liquid 3 and leached residues, and returning the leached liquid 3 to the step b to be used as a leaching agent for leaching high-silicon manganese ore. Under milder conditions, rhodochrosite minerals in the ore can be fully extracted, manganese silicate can be converted into manganese sulfate, the leaching rate of manganese can reach about 90%, and accordingly, the recovery rate of manganese is greatly increased, industrial implementation is easier and the method is environment-friendly.

The invention relates to a technology for extracting coenzyme Q10 in bacterial cells, which pertains to the technical field of microbiology engineering. Thalli is automatically and quantitatively put into from the dog-house of a continuous countercurrent device under the control of a weigh-instrument, a solvent is injected from a solvent inlet under the control of a flowmeter and the leaching solution and the thalli form reverse continuous countercurrent leaching process under the push of a shovel-like thruster; the concentration gradient is large, relative movement exists between the solventand the thalli and the thalli moves from the left end to the right end of an extraction container continuously under the function of the shovel-like thruster while the solvent moves from the right end to the left end of the container under the action of pressure; a diffusion boundary layer is thin and fast to be updated and the coenzyme Q10 is extracted after 2 to 10 hours of reaction of the thalli which enters from the left end of the device after the contact of the solvent and the thalli; the thalli enters a rake type dryer from the right end of an extraction device by press treatment and residual organic solvent in the thalli is treated with drying treatment in the rake type dryer; the yield of the coenzyme Q10 reaches more than 90 percent.

The invention relates to the field of non-ferrous metallurgy and resource recycling, in particular to a novel process for extracting vanadium from vanadium-containing waste catalyst reductive organic acid. The novel process comprise the steps that a vanadium-containing waste catalyst is directly extracted in a reductive organic acid system, and other reductive agents are not added, so that pentavalent or tetravalent vanadium is directly reduced into vanadium-oxygen-based ions or trivalent vanadium ions, the vanadium-oxygen-based ions or the trivalent vanadium ions are combined with organic acid radical anions and enter a solution, and vanadium-containing leaching liquid and vanadium-containing leaching slag are obtained; and ammonia water is added into the vanadium-containing leaching liquid to adjust pH so that ammonium vanadate can be formed and precipitated, and after separating is conducted, a vanadium pentoxide product is obtained by calcining precipitation slag. According to the novel process for extracting the vanadium from the vanadium-containing waste catalyst reductive organic acid, the vanadium is extracted by adopting the reductive organic acid system; the extracting condition is mild; the vanadium extracting rate is 95% or above and higher than the direct inorganic acid fluid extracting rate; and other impurity ions are not introduced in the extracting process, so that recycling of other metal elements in the waste catalyst is not affected.

The invention relates to a method for leaching rubidium, potassium and aluminum from a rubidium-containing mica ore. The method comprises the following steps that the rubidium-containing mica ore is mixed with concentrated sulfuric acid and subjected to a curing reaction, and thus a cured material is obtained; the cured material is reduced and roasted, and thus roasted sand and flue gas are obtained; the roasted sand is leached through water, and thus a leaching solution and leaching slag which contain rubidium and potassium are obtained; and the leaching slag is leached through an alkaline aqueous solution, and thus a leaching solution containing rubidium, potassium and aluminum is obtained. Synergistic extraction of potassium, aluminum and rubidium can be achieved, and the method has the beneficial effects that consumption of an acid / alkali reagent is less, energy consumption is low, the output quantity of waste slag is small, and the impact on the environment is small.

The present invention discloses a multi-element comprehensive utilization process for phosphorus-potassium associated ore. The process comprises: firstly, a fluorine-containing compound is used as an additional aid, and a leaching reaction of the phosphorus-potassium associated ore at a low temperature under an acidic condition is implemented, so as to obtain a silica residue and a leachate. The steps of calcium removal, hydrochloric acid distillation and neutralization are then performed successively to the resulting leachate, so as to obtain a calcium sulfate residue, a heavy iron residue, a heavy aluminum residue, a heavy magnesium residue, and a filtrate. The resulting filtrate is then supplemented with phosphorus, evaporated, and concentrated, so as to obtain a high concentration of NPK compound fertilizer. According to the process provided by the present invention, the fluorine-containing compound is used as the additional aid and hydrochloric acid is used as a leaching agent to process the phosphorus-potassium associated ore. Potassium feldspar is decomposed by means of a reaction of villiaumite and an acid to generate hydrofluoric acid in situ, effectively implementing a process of complete decomposition, complete separation and complete utilization. The process has advantages of low energy consumption, a high element leaching rate, and simple subsequent treatment processes, etc. No discharge problem of three waste exists in the treatment process. In addition, the involved process is simple and the reaction conditions are mild, so that the process is easy to implement and is suitable for popularization and application.

The invention relates to a method for producing low-temperature soybean meal by the leaching method, belonging to the food industry low-temperature soybean meal production field. The method takes a soybean slice as a raw material and uses pentane as leaching solvent to perform degreasing, and then wet meal is obtained; and the wet meal enters into a desolventizer-toaster for vacuum low-temperature exsolution, and then the low-temperature soybean meal is obtained. The leaching temperature is between 15 and 35 DEG C, the leaching time is between 20 and 35 minutes and the leaching frequency is 3; the residual oil rate of the soybean meal is reduced to below 1 percent; the vacuum degree of exsolution of the wet meal is between 73 and 86 kPa; the exsolution temperature is between 40 and 60 DEGC and the exsolution time is between 0.5 to 1 hour; the residual oil rate of the low-temperature soybean meal produced can reach blow 1 percent and residual solvent is below 200 milligrams per kilogram; and the NSI value of proteins of the soybean meal exceeds 80 percent. The low-temperature soybean meal produced by the method has high protein content, complete shape, white color and no foreign odor.