27 results about "Ethyl sulfate" patented technology

The invention provides dust-free antibacterial deodorant bentonite cat litter and a preparation method thereof, and belongs to the technical field of cat litter. Firstly, a certain amount of sodium bentonite, baking soda and calcium carbonate are used for preparing bentonite cat litter, then polyvinyl alcohol and sodium carboxymethyl cellulose which have the film forming property, polyhexamethylene guanidine hydrochloride which has the bactericidal property and soybean ethyl sulfate morpholine which has the deodorization function are used for preparing the bentonite cat litter; the components are compounded to obtain a functional dust suppressant with antibacterial, deodorant and film-forming effects, the functional dust suppressant is sprayed and coated on the surface layer of the bentonite cat litter, so that the prepared dust-free antibacterial and deodorant bentonite cat litter is remarkable in deodorant and antibacterial effects and good in wear resistance, and a layer of water-soluble film is formed on the surface of the dust suppressant after the functional dust suppressant is sprayed for dust suppression treatment, so that the dust suppression effect is good. The bentonite cat litter has the advantages that the structure and the film-forming property of the surface layer of the bentonite cat litter are improved, the hardness and the wear resistance of the surface are improved, the dust suppression effect of the cat litter is obviously improved, dust is extremely low under simulated falling and transportation conditions, and the cat litter has excellent water absorption and caking performance.

The synthesis method comprises the following steps: reacting a sulfonyl chloride intermediate with a red phosphorus-iodine-acetic acid reduction system to obtain an ethyl sulfate intermediate, and reacting the ethyl sulfate intermediate with 3-(2-chloropropionamido) methyl propionate in the presence of an organic alkali and an organic solvent to obtain the dithiobac-methyl. According to the synthesis method disclosed by the invention, the ethyl sulfate intermediate obtained by reducing the sulfonyl chloride intermediate directly reacts with the methyl 3-(2-chloropropionamido) propionate to obtain the dithiobac-methyl, so that the acidolysis step is reduced, the operation process is greatly simplified, the defect that disulfide impurities are easily generated by a sulfydryl intermediate is overcome, and the yield of the dithiobac-methyl is improved. And the fluopyrithiobac-methyl with relatively high purity can be obtained.

The invention relates to the technical field of aromatics, and particularly discloses an odor-removing aromatic composition containing microcapsules and a preparation method of the odor-removing aromatic composition. The odor-removing aromatic composition containing the microcapsules is prepared by compounding an odor-removing agent, a protective colloid, a thickening agent, a pH regulator, an aromatic, a microcapsule wall material and water, the protective colloid is formed by compounding starch sodium octenylsuccinate, polyacrylamide-sodium acrylate and polyvinylpyrrolidone; the odor removing agent is a compound of one or more of zinc oxide, 4-ethyl-4-soy-based ethyl sulfate morpholine and zinc diricinoleate; and the wall material of the microcapsule is a melamine-glutaraldehyde resin prepolymer. The detergent has the advantages that the peculiar smell can be well removed after the washing product is stored for a long time, and the washed object is endowed with fragrance.

The present invention belongs to the technical field of dust suppressants, and specifically discloses a preparation method and application of a magnesium powder dust suppressant with high agglomeration and flame retardancy, including the following components: 1-ethyl-3-methylimidazolium ethyl sulfate, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, N-butyl imidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, 1-butyl-3-methylimidazolium bromide, plant glycosides, sodium sulfate, magnesium chloride, and the remainder is water; the weight percentage of the water to all the above components is 60-80%. The present invention adopts the preparation method and application of the above-mentioned magnesium powder dust suppressant with high agglomeration and flame retardancy, solves the problem that a single-component metal magnesium dust suppressant in the prior art cannot meet the current metal magnesium production dust prevention demand, and has effective explosion suppression capability to ensure the safety of the staff and the factory during the metal magnesium processing.

To provide strawberries having an increased amount of aroma components and a method for producing the same. [Solution] The strawberry of the present invention contains, as aroma components, ethyl acetate, ethyl butyrate, ethyl 2-methylbutyrate, ethyl isovalerate and ethyl hexanoate, and the total content of the aroma components is 1150 ppb or more and 14100 ppb or less.

The invention discloses application of ethyl sulfate in preparation of a medicine for preventing and / or treating inflammatory bowel diseases, and belongs to the technical field of medicines. The invention finds that ethyl sulfate has the effect of preventing and / or treating inflammatory bowel disease for the first time: the ethyl sulfate can obviously improve the survival index of an inflammatory bowel disease model mouse and reduce the disease activity index; the symptoms of weight loss, stool character, inflammation-related diarrhea and bloody stool are relieved; the length of colon tissue is improved, and the size and number of tumors in colorectum are reduced; the pharmaceutical composition has the effects of inhibiting the level of proinflammatory cytokines (TNF-alpha, IL-8, IL-1beta and IL-6), recovering the level of anti-inflammatory cytokines (IL-10 and INF-gamma), inhibiting the enzymatic activity of MPO and MDA and improving the enzymatic activity of SOD and GSH-Px, so that the inflammatory reaction and oxidative stress reaction in the inflammatory bowel disease microenvironment are improved, and the pharmaceutical composition has the pharmacological action of preventing and / or treating the inflammatory bowel disease.

The application provides a polypropylene dissolving agent and application thereof, and belongs to the technical field of olefin dissolving agents.The polypropylene dissolving agent comprises the following raw materials in mass fractions: dicyanamide salt ionic liquid 10-25 parts, betaine salt 5-15 parts, tetrafluoroborate salt ionic liquid 5-15 parts, ethyl sulfate salt ionic liquid 5-15 parts, acetate salt ionic liquid 10-20 parts, long carbon chain anion ionic liquid 10-40 parts, dispersant 2-18 parts and auxiliary agent 2-20 parts.Under the condition of 180-280 DEG C, the mass fraction of the polypropylene dissolving agent of the application to polypropylene with a molecular weight of 500-1000 million can reach more than 15%, and the wet processing of the ultra-high molecular weight polypropylene into a film can be realized, and the polypropylene diaphragm or polypropylene fiber obtained by processing has the characteristics of high temperature resistance, high strength (including tensile and puncture strength), high porosity, high air permeability and the like.

The invention discloses a zinc ion battery electrolyte as well as a preparation method and application thereof, and belongs to the technical field of aqueous zinc ion batteries. The electrolyte comprises deionized water, soluble zinc salt and an ionic liquid additive, preferably, the ionic liquid is 1-ethyl-3-methylimidazole ethyl sulfate salt, and the adding concentration is 0.02-0.5 mol / L <-1 >. The additive can be preferentially adsorbed on the surface of the zinc negative electrode to form a protective layer, contact between free water and the zinc negative electrode is effectively blocked, and hydrogen evolution reaction and by-product generation are remarkably inhibited; meanwhile, zinc ions are guided to be uniformly deposited along a flat crystal face, and dendritic crystal growth is inhibited. The cycle life of the zinc symmetric battery assembled by adopting the electrolyte is prolonged by about 18 times, the coulombic efficiency of the zinc-copper asymmetric battery reaches 99.8%, and the capacity retention ratio is improved to 84% after the whole battery is circulated for 1000 times. The method is simple in process, low in cost, environment-friendly and suitable for large-scale energy storage application.

The present invention provides a technique capable of suppressing capacity degradation when charging an electricity storage device. A power storage device disclosed herein is provided with a non-aqueous electrolyte solution. The non-aqueous electrolyte solution contains a non-aqueous solvent and an additive A. And the non-aqueous solvent is carbonic ester. The additive A is at least one of 2-vinylpyridine, vinyl benzoate, 3, 4-thiophenedicarboxylic anhydride, 1-ethyl-3-methylimidazolium methyl sulfate, 1-ethyl-3-methylimidazolium ethyl sulfate, 1-ethyl-3-methylimidazolium methyl phosphonate and 1-ethyl-3-methylimidazolium bis (perfluoroethylsulfonyl) imide, and the additive B is at least one of 2-vinylpyridine, vinyl benzoate, 3, 4-thiophenedicarboxylic anhydride, 1-ethyl-3-methylimidazolium methyl sulfate, 1-ethyl-3-methylimidazolium ethyl sulfate, 1-ethyl-3-methylimidazolium methyl phosphonate and 1-ethyl-3-methylimidazolium bis (perfluoroethylsulfonyl) imide.

Identification markers for accurately distinguishing between antemortem alcohol consumption and postmortem alcohol introduction, and an identification method using the identification markers are provided. The identification markers include: a concentration ratio of ethanol in a heart blood sample in a dead body to ethanol in a vitreous humor sample in the dead body, concentrations of ethanol in a muscle of a lower limb and a testis in the dead body, and concentrations of ethyl glucuronide (EtG) and ethyl sulfate (EtS) in the muscle of the lower limb and a testis in the dead body

The application discloses a composite solvent, a method and a device suitable for simultaneously separating naphthenes and aromatics from naphtha, wherein the composite solvent is composed of dimethyl sulfoxide (I), cucurbituril (II) and 1-ethyl-3-methyl imidazole ethyl sulfate salt (III), the mass ratio of the three is I:II:III=(85-96):(3-14):1, the selectivity of the composite solvent to naphthenes can reach 6.27, the mass removal rate of naphthenes can reach 71.34%, the selectivity to aromatics can reach 36.16, and the mass removal rate of aromatics is 91.51%. The application has the characteristics that the special structure and properties of cucurbituril are used to enrich the naphthenes and aromatics and other cyclic compounds in the naphtha at the bottom of a reactor, and a filter is arranged at the bottom of an extraction tower to achieve the effect of rapid separation.

The invention relates to a lithium ion battery low-concentration / ultra-low-concentration electrolyte and a lithium ion battery, the lithium ion battery low-concentration / ultra-low-concentration electrolyte comprises a lithium salt, an organic solvent and an additive, the total molar concentration of the lithium salt is 0.1-0.5 mol / L, and the total content of the additive in the electrolyte is 5-10 wt%; the lithium salt is selected from one or more of lithium hexafluorophosphate (LiPF6), lithium bis (trifluoromethylsulfonyl) amide (LiFSI) and lithium tetrafluoroborate (LiBF4); the organic solvent is selected from one or more of propylene carbonate (PC), methyl ethyl carbonate (EMC) and fluoromethyl ethyl carbonate (FEMC); the additive is one or more of fluoroethylene carbonate (FEC), lithium difluorophosphate (LiPO2F2), lithium difluoro (oxalato) borate (LiDFOB) and ethyl sulfate (DTD). Compared with the prior art, the transmission rate of lithium ions across an electrode / electrolyte interface can be improved, and the cycle life and the capacity retention rate of the battery under the conditions of room temperature and low temperature are improved.

The invention discloses a preparation method of diethyl disulfide, and relates to the field of diethyl disulfide production, and the preparation method comprises the following steps: S1, preparing a sodium disulfide solution; step S2, adding the sodium disulfide solution in the step S1 and a catalyst into a reaction kettle, and dropwise adding a reactant into the reaction kettle, and step S3, after the reactant is dropwise added, carrying out a heat preservation reaction; s4, the solution is layered through cooling treatment, the upper layer is an organic phase, and the solution is a crude diethyl disulfide product, and S5, the reaction kettle is subjected to reduced pressure distillation, and the diethyl disulfide solution is obtained. The raw materials are the sodium disulfide solution, the sodium ethyl sulfate solution or the diethyl sulfate solution, the layered solution is obtained through the reaction, the colorless and transparent diethyl disulfide solution is obtained through reduced pressure distillation, the yield and purity of the diethyl disulfide solution are improved, the lower-layer reaction product sodium sulfate water phase can be recycled, and the environmental protection property is improved.

The invention belongs to the technical field of hydrogel-based ion selective membranes, and particularly discloses a high-toughness self-repairing cation selective hydrogel membrane as well as a preparation method and application thereof. I) a three-dimensional network formed by cross-linking polymerization of a carboxylic acid group-containing monomer and a sulfonic acid group-containing monomer in the presence of a cross-linking agent is distributed in the hydrogel film; ii) a high-molecular polymer chain which is selected from any one or a combination of more than two of poly (sodium 4-styrenesulfonate), poly (2-acrylamide-2-methyl-1-propanesulfonic acid), polyvinyl alcohol or polyethylene glycol; and iii) an ion transport medium, which comprises 1-ethyl-3-methylimidazole ethyl sulfate and water, the three-dimensional network and the high-molecular polymer chain are interpenetrated and wound to form an interpenetrating network structure; and the interpenetrating network structure is filled with an ion transmission medium. The hydrogel film has excellent cation selectivity, high toughness and self-repairing performance, is easy to prepare and can be applied to high-performance permeation energy conversion.

The invention discloses a deodorant for an airplane toilet and a preparation method of the deodorant, and the deodorant is prepared from the following components in percentage by weight: 2 to 3 percent of 1-ethyl-2-(heptadeca-8-alkenyl)-4, 5-dihydro-1-(2-ethoxyl) imidazoline ethyl sulfate, 1 to 2.5 percent of chlorogenic acid and 95.45 to 96.95 percent of deionized water. 1-ethyl-2-(heptadeca-8-alkenyl)-4, 5-dihydro-1-(2-ethoxyl) imidazoline ethyl sulfate which is originally used for cosmetics is used as a main component for deodorization of an airplane toilet, and chlorogenic acid is matched, so that the antibacterial effect is improved by one order of magnitude. The deodorant can effectively neutralize odor molecules such as mercaptans, hydrogen sulfide, ammonia, amine and 3-methylindole in human excrement, and can permanently inhibit generation of odor. The product meets the standard of American aviation standard SAE AMS 1476C (Aircraft Toilet Deodorant), and does not cause corrosion to metal and non-metal materials of aircrafts.

This invention discloses a zinc-containing hydraulic oil composition, which, by weight percentage, comprises the following components: 0.4-0.8 wt% zinc dialkyl dithiophosphate, 0.2-0.5 wt% bisphenol antioxidant, 0.1-0.25 wt% auxiliary antioxidant, 0.2-0.5 wt% ionic liquid, 0.02-0.05 wt% rust inhibitor, 0.01-0.02 wt% demulsifier, 0.01-0.02 wt% antifoaming agent, 1-5 wt% ester base oil, and the balance being mineral base oil. The zinc-containing hydraulic oil composition disclosed in this invention employs a three-antioxidant system, an azo ethyl sulfate ionic liquid, and a polyester compound system, providing effective corrosion and anti-wear protection for metals. It possesses advantages such as antioxidant properties, low sludge content, and good compatibility with other additives. Through the mutual compatibility of various additives, it exhibits excellent anti-wear properties, rust prevention, demulsification properties, thermal stability, and hydrolytic stability, meeting the stringent operating requirements of high-temperature and high-pressure hydraulic oil systems.

The invention provides a method for simultaneously preparing nonafluoroisobutyl ether and heptafluoroisobutyrate from bis (heptafluoroisopropyl) heptanone, i.e., the bis (heptafluoroisopropyl) heptanone and fluoroformate react under the catalytic action of alkali metal fluoride to obtain the nonafluoroisobutyl ether and the heptafluoroisobutyrate. The technical scheme provided by the invention has the following advantages: 1) the one-step reaction is realized for the first time to obtain the nonafluoroisobutyl ether and the heptafluoroisobutyrate; the process route is simplified, the equipment investment and the production complexity are reduced, and the technical economy is improved. And 2) compared with the existing nonafluoroisobutyl ether preparation technology, the method does not use a high-toxicity alkylating reagent dimethyl sulfate or diethyl sulfate, does not generate a large amount of difficult-to-treat and high-toxicity solid byproduct potassium methyl sulfate or potassium ethyl sulfate, and is safer and more reliable in process. 3) compared with the existing heptafluoroisobutyrate preparation technology, the technical scheme is simple in process, safe and reliable; the reaction selectivity is good, and byproducts are few; and the product is easy to separate and high in yield.

The invention relates to a cement high-temperature reinforcing agent, high-temperature-resistant cement paste for an oil well and application of the cement paste. The cement high-temperature reinforcing agent comprises hydrophobic silicon dioxide, ethyl sulfate, silazane and epoxy resin. The high-temperature-resistant cement paste for the oil well comprises G-grade oil well cement, calcium carbonate powder, alumina powder, ferric oxide, a cement high-temperature reinforcing agent, auxiliary materials and water, the mud high-temperature reinforcing agent / high-temperature-resistant cement paste for the oil well is applied to the oil well with the temperature of 150-250 DEG C. The cement paste has the beneficial effects that when the cement paste is introduced into a high-temperature stratum with the temperature of 150-230 DEG C, the initial hydration degree of the cement paste is low, and the cement paste is gradually hydrated and solidified as time goes by; the solidification mechanical property after hydration is good; the hydration speed of the cement paste when the cement paste is introduced into a high-temperature stratum at 150-230 DEG C can be controlled to a certain extent, and the control effect is good.

The invention provides a high-performance polyvinylidene fluoride dissolving agent and application thereof, and belongs to the technical field of polymeric membrane materials. The high-performance polyvinylidene fluoride dissolving agent is prepared from the following components in specific parts by mass: an imidazole tetrafluoroborate ionic liquid, an imidazole bis (fluorosulfonyl) imide salt ionic liquid, an imidazole bis (trifluoromethylsulfonyl) imide salt ionic liquid, an imidazole hexafluorophosphate ionic liquid, an imidazole ethyl sulfate salt ionic liquid and a piperidinium tetrafluoroborate ionic liquid. The invention relates to a piperidinium ionic liquid, which is characterized by comprising a piperidinium bis (fluorosulfonyl) imide salt ionic liquid, a piperidinium bis (trifluoromethylsulfonyl) imide salt ionic liquid, a piperidinium hexafluorophosphate ionic liquid, a piperidinium ethyl sulfate salt ionic liquid, a dispersing agent and an auxiliary agent. The PVDF dissolving agent disclosed by the invention consists of the imidazole ionic liquid and the piperidinium ionic liquid, is a green dissolving agent and has a good dissolving effect, and a PVDF separation membrane with excellent mechanical properties, high porosity and controllable pore size distribution can be prepared by dissolving PVDF by adopting the dissolving agent disclosed by the invention.

The invention provides an efficient antibacterial and mite-killing spray and a preparation method of the efficient antibacterial and mite-killing spray. The spray is prepared from the following components: 0.1 to 0.5 percent of tetrasodium glutamate diacetate, 0.5 to 1.5 percent of lauryl amine dipropylene diamine, 0.1 to 0.5 percent of dichlorobenzyl alcohol, 0.2 to 2.0 percent of PEG-40 hydrogenated castor oil, 0.5 to 2.0 percent of persimmon extract, 0.5 to 1.5 percent of soybean ethyl sulfate morpholine, 0.2 to 1.0 percent of dodecyl dimethyl benzyl ammonium chloride, 0 to 0.5 percent of lactobacillus / rye fine powder fermentation product, 1 to 5 percent of glycerol, 0.5 to 1.0 percent of ethylhexylglycine, 0 to 1.0 percent of lactic acid and the balance of water. 0 to 0.3 percent of essence; and 82.7 to 96.9 percent of deionized water. A unique odor control technology is adopted to be compounded with the persimmon extract, odor molecules are decomposed from the source at a multiple speed, and the environment is purified. The mite-killing spray has the effects of removing odor, inhibiting bacteria, killing mites and balancing micro-ecology, and pets and the surrounding environment can be cared and cared in a multi-effect manner.

The application discloses a preparation method of an intelligent Janus textile with an excellent heat-regulating graphene oxide and hydrogel coating, and belongs to the technical field of energy materials. The original fabric is used as a carrier, a graphene oxide coating is brushed on the front of the fabric, the coating belongs to a heating mode, has good light-heat conversion performance, converts solar energy into heat energy, makes the temperature of the fabric rise to achieve a heating effect, and has sterilization performance, so that health problems can be reduced; a hydrogel coating is sprayed on the back of the fabric, the coating belongs to a cooling mode, has good water absorption performance, some water is actively added to the surface of the coating, water is evaporated under sunlight to absorb a large amount of heat, so that the surface temperature of the fabric is reduced to achieve a cooling effect, and 2-(N-(2-(methacryloyloxy)ethyl)-N,N-dimethylamine)ethyl sulfate is added to the cooling layer coating, so that the coating has antibacterial performance and can inhibit the growth of bacteria; the intelligent fabric integrates heating, cooling and antibacterial performance, and the performance value of the intelligent fabric is greatly improved.

The present invention discloses an ion gel for a stretchable circuit and a stretchable circuit board based thereon. The ion gel is prepared by physical cross-linking an ionic liquid and gelatin in proportion. The cations in the ionic liquid are one or more of 1-butyl-3-methylimidazole, 1-ethyl-3-methylimidazole, 1-n-octyl-3-methylimidazole, 1-n-dodecyl-3-methylimidazole, 1-butyl-2,3-dimethylimidazole, 1-butyl-methylpyrrolidinyl, and 1-methylpropylpyrrolidinyl, and the anions are one or more of bromide, chloride, boron tetrafluoride, ethyl sulfate, phosphorus hexafluoride, dicyanamide, and bistrifluoromethanesulfonimide. The present invention precisely controls the conductivity, morphology, and viscosity of the ion gel by selecting the ionic liquid in the ion gel and the mass ratio of the ionic liquid to gelatin, making it easy to adapt to diverse application scenarios.

The invention provides a polypropylene dissolving agent and application thereof, and belongs to the technical field of olefin dissolving agents. The polypropylene dissolving agent is prepared from the following raw materials in parts by mass: 10 to 25 parts of dinitrile amine salt ionic liquid, 5 to 15 parts of betaine salt, 5 to 15 parts of tetrafluoroborate ionic liquid, 5 to 15 parts of ethyl sulfate salt ionic liquid, 10 to 20 parts of acetate ionic liquid, 10 to 40 parts of long carbon chain anion ionic liquid, 2 to 18 parts of dispersing agent and 2 to 20 parts of auxiliary agent. Under the condition of 180-280 DEG C, the mass fraction of polypropylene with the molecular weight of 500,000-10,000,000 dissolved by the polypropylene dissolving agent reaches 15% or above, the ultra-high molecular weight polypropylene wet processing casting piece film forming can be achieved, and a polypropylene diaphragm or polypropylene fiber obtained through processing has the advantages of being resistant to high temperature, high in strength (including tensile strength and puncture strength), high in porosity / high in breathability and the like.

An electrolyte solution containing lithium ethyl sulfate and ethyl sulfate. The lithium ethyl sulfate is present in an amount of 0.1 to 2.0% by mass relative to the electrolyte solution. The lithium ethyl sulfate and the ethyl sulfate give a mass ratio of the lithium ethyl sulfate to the ethyl sulfate of 80 to 1500. Also disclosed is an electrochemical device and lithium ion secondary battery containing the electrolyte solution, a module including the electrochemical device and a method for producing lithium ethyl sulfate.

A technique is provided that can suppress a capacity deterioration when an electric charge is performed on an electric storage device. The herein disclosed electric storage device includes a nonaqueous electrolytic solution. The nonaqueous electrolytic solution contains a nonaqueous solvent and an additive agent A. The nonaqueous solvent is carbonates. The additive agent A is at least one of 2-vinylpyridine, vinyl benzoate, 3,4-thiophenedicarboxylic anhydride, 1-ethyl-3-methylimidazolium methyl sulfate, 1-ethyl-3-methylimidazolium ethyl sulfate, 1-ethyl-3-methylimidazolium methylphosphonate, and 1-ethyl-3-methylimidazolium bis(perfluoroethylsulfonyl)imide.

The present invention provides a sodium ion secondary battery (NIB) that has excellent cycle characteristics, which are important for secondary batteries mounted on a vehicle such as an electric vehicle, and an electrolyte that makes it possible to produce such a sodium ion secondary battery. A sodium ion secondary battery according to the present invention is characterized by comprising a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte in which a supporting salt is dissolved in a non-aqueous solvent, wherein: the positive electrode comprises a material that contains a sodium composite oxide; the negative electrode comprises a material that contains hard carbon; and the non-aqueous electrolyte contains more than 0.01 wt% but not more than 0.5 wt% of at least one substance selected from among lithium methyl sulfate, lithium ethyl sulfate, sodium methyl sulfate, sodium ethyl sulfate, potassium methyl sulfate, and potassium ethyl sulfate.

To provide a technique capable of suppressing a capacity degradation when a power storage device is charged.SOLUTION: A power storage device disclosed herein includes a non-aqueous electrolytic solution. The non-aqueous electrolytic solution includes: a non-aqueous solvent; and an additive agent A. The non-aqueous solvent is a carbonate. The additive agent A is at least one of 2-vinylpyridine, vinyl benzoate, 3,4-thiophenedicarboxylic anhydride, 1-ethyl-3-methylimidazolium methyl sulfate, 1-ethyl-3-methylimidazolium ethyl sulfate, 1-ethyl-3-methylimidazolium methyl phosphonate, and 1-ethyl-3-methylimidazolium bis (perfluoroethylsulfonyl) imide.SELECTED DRAWING: None