421 results about "Extraction Purification" patented technology

The combustion fume flowing in through line 1 is decarbonated by contacting with a solvent in column C2. The solvent laden with carbon dioxide is regenerated in zone R. The purified fume discharged through line 9 comprises part of the solvent. The method allows to extract the solvent contained in the purified fume. The purified fume is contacted in zone ZA with a non-aqueous ionic liquid of general formula Q+ A−; Q+ designates an ammonium, phosphonium and / or sulfonium cation, and A− an anion likely to form a liquid salt. The solvent-depleted purified fume is discharged through line 17. The solvent-laden ionic liquid is regenerated by heating in evaporation device DE. The solvent separated from the ionic liquid in device DE is recycled.

A simple chain-extending approach was established for the scale-up of the monoprotected monodisperse PEG diol materials. Reactions of THP-(OCH2CH2)n—OMs (n=4, 8, 12) with a large excess of commercially available H—(OCH2CH2)n—OH (n=1-4) under basic conditions led to THP-(OCH2CH2)n—OH (n=5-15). Similarly, Me-(OCH2CH2)n—OH (n=4-11, 13) were prepared from Me-(OCH2CH2)n—OMs (n=3, 7, 11). For the chain elongation steps, 40-80% yields were achieved through extraction purification. PEG oligomer libraries I and II were generated in 50-95% overall yields by alkylation or acylation of THP-(OCH2CH2)n—OH (n=1-15) followed by deprotection. Alkylation of Me-(OCH2CH2)n—OH (n=1-11, 13) with X—(CH2)m—CO2R (X=Br or OMs) and subsequent hydrolysis led to PEG oligomer library III in 30-60% overall yields. Combinatorial purification techniques were adapted to the larger-scale library synthesis. A total of 498 compounds, each with a weight of 2-5 g and a minimum purity of 90%, were synthesized.

The invention discloses a method for preparation of high purity manganese sulfate and zinc sulfate from waste zinc-manganese batteries. Zinc-manganese batteries mainly contain manganese, zinc, iron, copper and other valuable metal components, and by means of sulfuric acid dissolution, iron powder replacement, oxidation neutralizing for iron removal, extraction purification and separation, crystallization and other processes, high purity manganese sulfate and zinc sulfate products can be prepared. The high purity manganese sulfate obtained by the invention can be used for preparation of battery materials, and the high purity zinc sulfate can be used for medicine, feed, food, chemical industry and other fields. The method provided by the invention has the characteristics of high resource utilization and recovery rate, and high product quality, etc.

The invention provides a technique and a system for preparing propylene oxide by directly oxidizing propylene with oxygen and hydrogen. The technique comprises the following steps that: (1) propylene, circulation propylene, and high-boiling-point organic sulfide are added to a mixed solvent of methanol and hydrazine hydrate, hydrogen and oxygen are accessed, and raw propylene oxide is produced; (2) raw propylene oxide is cooled and pumped into a rough separation tower by a pump, and organic sulfide and a few of high-boiling-point by-products in raw propylene oxide are removed; (3) a balance mixture of propylene and propylene oxide enters a propylene stripping tower, and unreacted propylene and a little propylene oxide in the mixture are removed; and (4) balance propylene oxide mixed liquor enters an extraction purification tower containing cumin and an alkaline solution, and is further extracted and rectified to form propylene oxide with high purity. The technique and the system are energy-saving and environmentally friendly, can increase the purity and the yield of propylene oxide significantly, reduce the losses of propylene oxide, and are suitable for industrialized production.

The invention discloses a double-liquid-phase fermentation method of red koji citraurin by coupled in-situ fermentation-extraction, belonging to the field of fermentation engineering. On the basis of a novel red koji bacterium liquid fermentation culture medium, a water-insoluble extraction phase and the basal culture medium constitute the fermentation system, thereby preventing the conversion of the citraurin to monascus red and yellow pigment, and further enhancing the conversion rate and yield of the red koji citraurin; and the double-liquid-phase extraction-fermentation coupled system is beneficial to enhancing the dissolved oxygen level, thereby ensuring the normal growth and fermentation of the red koji bacterium, promoting the secretion of the red koji pigment to the outside of cells, and lowering the negative feedback inhibiting action of the red koji fermentation product. The method disclosed by the invention can implement high-efficiency biosynthesis, release and extraction of the red koji citraurin within a short fermentation period, thereby obviously enhancing the productivity and yield of the red koji citraurin and simplifying the subsequent pigment extraction purification technique. The extractant can be recycled, thereby greatly enhancing the production efficiency and lowering the production cost.

A design method of real-time fluorescence quantitative PCR internal standard includes the following steps: (1) designing a primer sequence according to the activating genes to be tested, select the corresponding internal standard genes, whose primer sequence is same to that of the activating genes; (2) designing the probe of the activating genes, determining the concentration, and labeling a fluorescent reporting group at the 5' end of the probe; (3) designing two probes of the internal standard genes, one probe corresponding to the internal standard genes, the other probe corresponding to another sequence of the activating genes, and respectively labeling a same fluorescent reporting group at the 5' end of the two probes; (4) extracting and purifying the activating nucleic acid, and performing real-time fluorescence quantitative PCR amplification. The present invention can effectively monitor errors occurring in the nucleic acid extraction, amplification and product analysis processes, thus avoiding false-negative results.

The invention provides a nucleic acid extraction kit, which comprises pyrolysis combining liquid, washing buffer liquid and elution buffer liquid, wherein the pyrolysis combining liquid is prepared from 0.5 to 2 percent of FAME (fatty acid methyl ester) ethoxylate sodium sulfonate and 3 to 5 percent of magnetic beads; less silicone oil is added into the washing buffer liquid; the whole nucleic acid extraction time is reduced; the waste liquid residue is reduced; nucleic acid extraction purification effect is improved; meanwhile, the precision and the sensitivity of nucleic acid detection are also improved.

The invention provides a method for extracting scandium from nickel laterite ores. The method includes carrying out leaching treatment on the nickel laterite ores by the aid of sulfuric acid to obtain leach liquor of the nickel laterite ores; carrying out scandium-rich precipitation treatment on the leach liquor of the nickel laterite ores by the aid of first precipitants to obtain scandium-rich precipitates; carrying out two-stage counter-current leaching treatment on the scandium-rich precipitates; carrying out scandium extraction enrichment treatment on first-stage leach liquor by the aid of first organic extracting agents to obtain organic phases with the scandium and raffinate; carrying out back-extraction treatment on the organic phases with the scandium by the aid of hydrochloric acid; carrying out extraction purification treatment on water phases with the scandium by the aid of second organic extracting agents and obtaining purified water phases with the scandium; mixing the purified water phases with the scandium and second precipitants with one another to obtain precipitation with the scandium; calcining the precipitation with the scandium to obtain scandium oxide. The first-stage leach liquor is obtained by means of two-stage counter-current leaching treatment. The water phases with the scandium are obtained by means of back-extraction treatment. The method has the advantage that the recovery rate can be effectively increased when the scandium is extracted from the nickel laterite ores by the aid of the method.