101results about How to "Reduce the amount of acid" patented technology

The invention discloses preparation of conductive manganese-titanium lithium ion sieve / graphene composite hydrogel and an application of the conductive manganese-titanium lithium ion sieve / graphene composite hydrogel in extraction of lithium from salt lake brine. A manganese-titanium lithium ion sieve is prepared by adopting a sol-gel method, and manganese-titanium lithium ion sieve / graphene composite hydrogel (MnTi / GNs-LIPs) is prepared by adopting an in-situ thermal initiation polymerization method. According to the method, an adsorption-electrodeionization exchange method is adopted, the MnTi / GNs-LIPs adsorbent selectively adsorbs lithium in the salt lake brine and then is placed in a single weakly acidic solution, lithium is rapidly desorbed through electrodeionization exchange, and the purpose of recycling lithium in the salt lake brine in a classified mode can be achieved after repeated operation.

The invention discloses a method for determining manganese and titanium content in ferrophosphorus through a microwave digestion ICP-AES method. The method comprises the steps of microwave sample digestion, standard solution preparation, standard curve drawing and sample determination; and the steps are as follows: adding nitric acid, hydrochloric acid and hydrofluoric acid to perform microwave digestion after wetting a ferrophosphorus sample by water, and adding a boric acid solution after the microwave digestion is accomplished; manufacturing a matrix solution through high-purity iron and reference monopotassium phosphate reagent digested sample, adding single element standard solutions of manganese and titanium to prepare a series of mixed standard solutions in different concentrations;selecting the optimal analysis wavelengths of the manganese and titanium, and determining the emission intensity of the manganese and titanium elements in the blank solution and the series of mixed standard solutions by utilizing an inductively coupled plasma atomic emission spectrometer, and drawing a series of standard curves; and determining the spectral line intensities of the manganese and titanium in a ferrophosphorus sample to-be-determined solution by utilizing the inductively coupled plasma atomic emission spectrometer, and finding out the concentrations of the manganese and titaniumand ferrophosphorus samples from the standard curve. The method disclosed by the invention is low in cost, simple in operation and strong in practicability.

The invention provides an electrolytic method of polymetallic raw copper. The method takes raw copper as an anode, a copper plate or stainless steel as a cathode and carries out electrolysis under the process conditions as follows: (1) the electrolytic solution contains 10g / l to 30g / l of nitric acid, 15g / l to 180g / l of cupric nitrate and the residual quantity of water, which form a cupric nitrate- nitric acid system which keeps the components of the electrolytic solution in the concentration range of the system during the electrolytic process; (2) salt chloride is added into the electrolytic solution and during the electrolytic process, the concentration of the chloride ion is kept between 1 to 10g / l; and (3) cathode current density 100A / m<2> to 300A / m<2>. During the electrolytic process, the method can loosen the anode sludge to cause the anode sludge to fall off automatically, thus overcoming the anodic passivity and the electrolytic process can be conducted smoothly. The method also has the advantages of lowering the cost for separating copper and other metal, shortening the production cycle and reducing environment pollution.

The invention provides a post-treatment method for 4,6-dihydroxypyrimidine synthesis, belongs to the technical field of organic chemical industry, and relates to a method for alkali recovery and application and wastewater recovery and application in a chemical industry product, particularly to a process. According to the process, formamide, dimethyl malonate and sodium methoxide are adopted as starting raw materials and cyclization is performed to prepare 4,6-dihydroxypyrimidine; after the reaction is completed, negative pressure suction filtration is performed, the filtrate is subjected to partial methanol removing, and the alkali is recovered and applied; and after the filter cake is subjected to acidification crystallization, negative pressure suction filtration is performed, the filter cake is dried to obtain the product, the mother liquor is concentrated to recover the 4,6-dihydroxypyrimidine, and the acid water is neutralized so as to be recycled while the by-product salt can be recovered so as to be comprehensively utilized. According to the present invention, after the alkali recovery and application, the acid consumption for the subsequent acidification treatment can be significantly reduced so as to substantially reduce the production cost and the three-waste amount; and the post-treatment method has characteristics of less equipment investment, three-waste treatment cost reducing, easy raw material recovery and application, and the like, and is suitable for industrial production.

The invention discloses a method for preparing beet pectin in a diluted acid-pressing way. The method comprises the following steps: slowly refrigerating fresh pressed pulp or stored refrigerated pressed pulp by taking wet pulp having the water content being 75 to 80 percent as a raw material, washing with clear water, draining off, loading into an extraction tank, and adding deionized water; adjusting the pH value of a solution with acid; soaking at 65-85 DEG C; periodically raising the pressure in the extraction tank in a soaking process, keeping the pressure, recovering to normal pressure, raising the pressure and lowering the pressure to the normal pressure, wherein a pressure changing period lasts for 1 to 3 times; stirring the materials in the extracting tank to obtain crude filtrate; adding a carbonate solution into the crude filtrate, and finely filtering in a filter press; concentrating the finely-filtered pectin extracting solution, and precipitating; removing a solvent, and drying to obtain the beet pectin. The method is mild in reaction conditions and simplified in process, the problem of poor mass transfer caused by absorption expansion of beet wet meal is solved, degradation of pectin molecules and the loss of neutral sugars on side chains are avoided, the yield and quality of the pectin are improved, and the processing cost is lowered.

The invention relates to a biomass wet detoxification method of hexavalent chromium-contained waste residues. The method comprises the following steps: (1) chromium residues are pulpified to slurry; (2) the pH of the slurry is adjusted to 7.0-10.0; (3) after the slurry is heated, the slurry is added in biomasses for stirring and pulpifying; and (4) the slurry is filtered to obtain the qualified chromium residues with standard content of hexavalent chromium. The chromium residues obtained by the treatment method accord with the leaching toxicity [Cr(VI)] not more than 3 mg / L stated by the chromium residue pollution environmental protection technical specifications (HJ / T301-2007), also accord with the leaching toxicity [Cr(VI)] not more than 2.5 mg / L stated by the hazardous waste landfill pollution control standards (GB18598-2001), and can be embedded as general industrial solid wastes. Raw materials used by the method are easily obtained biomasses with low cost, and are low in detoxification temperature and treatment cost; and the method is simple in flow, is suitable for industrial production, and has better industrial application foreground.

The invention discloses a low-acid-value Yunnan pine seed oil and a preparation method thereof, the invention further provides an application of the pine seed oil in foods and treatment of cardiovascular and cerebrovascular diseases and other diseases. The capsule disclosed by the invention can promote normal metabolism of cholesterol, so that the plasma cholesterol can be reduced, the function of promoting lipid deposition in the endothelial cells of the artery by blood platelets can be obviously inhibited, the blood platelet aggregation can also be reduced, the thrombosis can be inhibited, and the fasting blood glucose of a patient can be remarkably improved.