35results about How to "Moderate boiling point" patented technology

The present inventions are (A) a solvent comprising at least one cycloalkyl alkyl ether (1) represented by the general formula: R1-O—R2 (wherein R1 is cyclopentyl or the like; and R2 is C1-10 alkyl or the like); (B) a method of preparations the ethers (1) characterized by reacting an alicyclic olefin with an alcohol in the presence of an acid ion-exchange resin having a water content of 5 wt % or less. The solvent is useful as cleaning solvent for electronic components, precision machinery components or the like, reaction solvent using various chemical reactions, extraction solvent for extracting objective organic substances, solvent or remover for electronic and electrical materials, and so on. The process enables industrially advantageous production of the objective cycloalkyl alkyl ethers (1).

The present inventions are (A) a solvent comprising at least one cycloalkyl alkyl ether (1) represented by the general formula: R1—O—R2 (wherein R1 is cyclopentyl or the like; and R2 is C1-10 alkyl or the like); (B) a method of preparations the ethers (1) characterized by reacting an alicyclic olefin with an alcohol in the presence of an acid ion-exchange resin having a water content of 5 wt % or less. The solvent is useful as cleaning solvent for electronic components, precision machinery components or the like, reaction solvent using various chemical reactions, extraction solvent for extracting objective organic substances, solvent or remover for electronic and electrical materials, and so on. The process enables industrially advantageous production of the objective cycloalkyl alkyl ethers (1).

The invention relates to an environment-friendly cut tobacco expanding agent composition, which comprises the following components in percentage by weight: 50-99 percent of hydrofluoroalkane and 1-50 percent of alcohol or ether or alkane, wherein the hydrofluoroalkane is one or any combination of several kinds of pentafluoropropane, pentafluorobutane, decafluoropentane or methoxyl heptafluoropropane, preferably 80-99 percent of hydrofluoroalkane and 1-20 percent of alcohol or ether or alkane; and more preferably, 90-99 percent of hydrofluoroalkane and 1-10 percent of alcohol or ether or alkane. The environment-friendly cut tobacco expanding agent composition has favorable chemical stability; and the ozone depletion potential (ODP) index of the environment-friendly cut tobacco expanding agent composition is zero which is far lower than CFC-11, so the environment-friendly cut tobacco expanding agent composition is beneficial to the environmental protection.

The invention discloses a circulation method for preparing expanded cut tobacco, comprising the following steps: (1) putting cut tobacco into a preheated impregnating tank, then carrying out vacuum-pumping; (2) spraying liquid expanding agent to the cut tobacco; (3) filling gas expanding agent to the impregnating tank; (4) impregnating; (5) first, recycling the liquid expanding agent, then recycling the gas expanding agent; and (6) expanding the impregnated cut tobacco, and carrying out operations in step (2) or / and step (3) by the liquid expanding agent and the gas expanding agent recycled in step (5). The method of the invention has mild condition and greatly reduced requirement for devices, by fully recycling the expanding agents, the cost is lowered, the complete set of devices has low energy consumption and high automation, continuous mass production can be carried out, all performance indexes of the obtained expanded cut tobacco are high, the expanded efficiency of the cut tobacco is high, and the recycling rate of the expanding agents is high.

The present invention relates to a shredded tobacco expansion agent composition. The first shredded tobacco expansion agent composition of the present invention is composed of pentafluorobutane and heptafluoropropane, the second is composed of pentafluorobutane and hexafluoropropane, and the third is composed of pentafluorobutane and heptafluoropropane. Butane and pentafluoropropane, the fourth is composed of pentafluorobutane and tetrafluoroethane, and the fifth is composed of pentafluorobutane and decafluoropentane. The cut tobacco expander composition of the present invention has an ozone depletion potential (ODP) of zero, moderate boiling point, safety, low toxicity and nonflammability, and can replace CFC-11 as a cut tobacco expander in the tobacco industry.

The invention provides a safe preparation method for an electrolyte additive with a low cost and a high yield and capable of large-scale preparation. The electrolyte additive is an AaXxBb compound employing fluorinated metal salt, fluorinated gas and nitrogen-containing ligands as raw materials, A is at least any one selected from Cs, Rb, Sr and Ba, X is at least any one selected from C5H5N, (C2H5)3N, CH3CN, (CH2CN)2 and (C2H4CN)2, wherein, a is more than 0 and less than 3, x is more than 0 and less than 3, and a is more than 0 and less than 3. Fluorinated metal salt is dissolved in an alcohol and ether solvent, nitrogen-containing ligands are added at a normal temperature under protection of inert gas, fluorinated gas and nitrogen are mixed and inputted into the container under circulation of a cooling medium, the reaction is carried out for 2-4h, centrifugation and washing are repeated, and the AaXxBb compound is obtained after drying. The provide preparation method can be applied to the compound synthesis field.

The present invention relates to diol compound (II) or S-diol compound (II ') in C 4 -C 7 In the mixed solvent of ketone solvent and water, under alkaline condition, react cyclization with arylsulfonyl chloride or alkylsulfonyl chloride to obtain citalopram and S-citalopram. The solvent used in the invention has high solubility to reactants and products, thus reducing the amount of solvent used and improving production capacity, and at the same time, the post-treatment extraction effect is good and the operation is simple and convenient.

The invention relates to a kind of biomass raw material with starch as the main component and SO in an aprotic halogenated alkyl solvent 3 A new clean production process for synthesizing water-soluble starch sulfate with smooth reaction and high conversion rate. Utilizing the process can fully expand the use of starch-containing biomass raw materials, and the water solubility and binding performance of the product are significantly improved. The process is simple, the production process is clean and environmentally friendly, the conditions are mild, unreacted materials can be directly used or recycled, no toxic side ions and solvent residues, the product is light in color, safe and environmentally friendly, and can be used in a wide range of applications. It has huge industrial application prospects and significant The economic and ecological benefits meet the strategic requirements of vigorously developing natural renewable resources and sustainable development.

The invention provides a high-efficiency fire extinguishing agent and fire safety fire extinguishing technology. The present invention prepares melamine urea-formaldehyde resin as shell material by preparing melamine urea-formaldehyde resin prepolymer and mixing it with montmorillonite, defoaming agent and perfluorohexanone and heptafluorocyclopentane as fire extinguishing materials. Perfluorohexanone and heptafluorocyclopentane are high-efficiency fire extinguishing agents with a core-shell structure as core materials; and by loading the prepared high-efficiency fire extinguishing agents on the outer surface of lithium-ion batteries, it provides effective safety protection for lithium-ion batteries and ensures Fire safety of lithium-ion batteries. Through the above method, the fire extinguishing process provided by the present invention can break the high-efficiency fire extinguishing agent when the lithium-ion battery is thermally out of control, release the fire extinguishing material, play the dual role of flame retardancy and fire extinguishing in time, and ensure the fire extinguishing effect while taking into account the cooling ability. The lithium-ion battery fire can be quickly extinguished and cooled, effectively preventing the re-ignition of the lithium-ion battery, so as to ensure the safety of the lithium-ion battery.

The invention discloses an extracting agent for purifying wet-process phosphoric acid and a method of extracting wet-process phosphoric acid by the extracting agent. The extracting agent comprises the following components in mass percent: 35%-95% of n-butyl alcohol, and 5%-65% of one of isooctyl alcohol, n-butyl ether, high-carbon ketone, aliphatic amine or quaternary ammonium salt. The method comprises the following steps of defluorinating and destaining crude wet-process phosphoric acid, and carrying out 6-10-level counter-current extraction according to a ratio of the extracting agent to crude phosphoric acid being (2-5) to 1, wherein sulfuric acid is added to a crude phosphoric acid inlet in the sixth or seventh level of counter-current extraction; and washing an extracting phase by using industrial phosphoric acid in which sodium carbonate is dissolved, re-extracting by using deionized water to obtain a re-extracting liquid, finally purifying the re-extracting liquid and performing concentration to obtain the industrial phosphoric acid. The extracting agent provided by the invention has the advantages that organic matters with close and moderate boiling points is subjected to binary compound, an extracting characteristic of a compound solvent is obvious, a property is stable, the extracting agent is easy to recycle and is reused for a long time, extraction is performed under room temperature and is energy-saving, crude phosphoric acid does not need to be purified in advance, the productive technology is simple, and the production cost is low.

The invention discloses a preparation method of an acetoacetyl modified ethylene-vinyl alcohol copolymer. Commercial ethylene vinyl alcohol (EVOH) is used as a raw material, the ethylene content in the EVOH is 20%-40%, the vinyl alcohol content in the EVOH is 60%-80%, and by virtue of the modification by diketene, the acetoacetyl content in the obtained modified copolymer is 0.60-2.20mol / kg. The preparation method disclosed by the invention comprises the following two steps of: (1) dissolving the ethylene-vinyl alcohol copolymer in an organic solvent to react with the diketene under the catalytic action of an organic base; and (2) adding an organic solvent after the reaction is ended to precipitate the product. The acetoacetyl modified ethylene-vinyl alcohol copolymer obtained prepared the invention is white solid powder, and is good in product quality and water solubility.

The invention discloses a method for benzylation of monosaccharide methyl glycoside: add monosaccharide methyl glycoside, sodium hydride, toluene and benzyl chloride in sequence in a reactor, heat up to a reaction temperature of 60-130°C, and keep warm until the reaction is complete , after the end of the reaction, the post-treatment of the reaction solution produces a benzylated product of the monosaccharide methyl glycoside; the benzylated product of the monosaccharide methyl glycoside is that all the hydroxyl-OH on the monosaccharide methyl glycoside are all benzylated to generate ‑O ‑Bn product, Bn represents benzyl. Both the reaction solvent and the extraction solvent of the present invention are toluene, which simplifies the post-processing operation. The by-product toluene in the reaction process is consistent with the reaction solvent, and the recovered toluene can be directly used as the next batch of reaction solvent without removing water, thereby simplifying the operation. The purpose of reducing the unit consumption of sodium hydride and benzyl chloride, effectively reducing the generation of by-product dibenzyl ether, and reducing pollution.