493 results about "Ethyl lactate" patented technology

A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a blend of lactic acid ester, such as ethyl lactate, and a fatty acid ester, such as methyl soyate. The fluid system may be further in the form of a microemulsion that is formed by combining a blend with one or more emulsifiers, an alcohol, and water. The fluid system may be used in displacement, well remediation and stimulation as well as additional, alternative applications such as the cleaning of surface and / or downhole equipment.

A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a fatty acid ester, such as methyl soyate. The fluid system may further contain a lactic acid ester, such as ethyl lactate, and / or a nonionic surfactant. The fluid system may be used in displacement, well remediation and stimulation as well as additional, alternative applications such as the cleaning of surface and / or downhole equipment.

An element of an absorbent article is provided. The element has a bio-based content of at least about 50% based on the total weight of the element, and comprises a synthetic polymer derived from a renewable resource via a first intermediate compound selected from the group consisting of crotonic acid, propiolactone, ethylene oxide, i-propanol, butanol, butyric acid, propionic acid, 2-acetoxypropanoic acid, methyl 2-acetoxypropanoate, methyl lactate, ethyl lactate, polyhydroxybutyrate, and a polyhydroxyalkanoate comprising 3-hydroxypropionate monomers. An absorbent article comprising the element and a method of making an element for an absorbent article also are provided.

A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a blend of lactic acid ester, such as ethyl lactate, and a fatty acid ester, such as methyl soyate. The fluid system may be further in the form of a microemulsion that is formed by combining a blend with one or more emulsifiers, an alcohol, and water. The fluid system may be used in displacement, well remediation and stimulation as well as additional, alternative applications such as the cleaning of surface and / or downhole equipment.

Certain applicator liquids and application techniques are described, which can be used to form nanotube films or fabrics of controlled properties. An applicator liquid for preparation of a nanotube film or fabric includes a controlled concentration of nanotubes dispersed in ethyl lactate. The controlled concentration is sufficient to form a nanotube fabric or film of preselected density and uniformity.

A biodegradable penetrating lubricant, comprised of: (A) at least one triglyceride oil of the formula: wherein R1, R2, and R3 are aliphatic hydrocarbyl groups containing from about 7 to about 23 carbon atoms; (B) an organic solvent selected from the group comprising: (1) ethyl lactate, (2) soy methyl ester, (3) at least one mineral spirit, and (4) combinations of 1, 2, and 3; and, (C) an antioxidant. Optionally, the lubricant may further include an additive selected from the group comprising: (D) an anti-wear inhibitor; (E) a corrosion inhibitor; (F) a pour point depressant; and, (G) a component chosen from the group comprising: (1) a food grade tackifier; (2) molybdenum disulfide; and (3) a combination of 1 and 2.

A topical insecticide is provided which can be safe to use and avoids many common deleterious side effects of conventional topical insecticides. In one preferred embodiment of the invention, the active ingredient of the insecticide formulation is an amine derivative, having a nitro-methylene group, a nitroamino group or a cyanoamino group, which can be formulated to have low toxicity and excellent insecticidal activity. One particularly suitable insecticide is 1-{(tetrahydro-3-furanyl)methyl}-2-nitro-3-methylguanidine (dinotefuran), an aldulticide that will kill adult fleas, dissolved in phenyl methanol or ethanol and ethyl lactate.

A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a fatty acid ester, such as methyl soyate. The fluid system may further contain a lactic acid ester, such as ethyl lactate, and / or a nonionic surfactant. The fluid system may be used in displacement, well remediation and stimulation as well as additional, alternative applications such as the cleaning of surface and / or downhole equipment.

A photoresist stripper composition is made up of a mixture of an acetic acid ester, gamma-butyrolactone (GBL), and a non-acetate ester or a poly alkyl alcohol derivative. The acetic acid ester may be at least one of n-butyl acetate, amyl acetate, ethyl aceto-acetate, and isopropyl acetate. The non-acetate ester may be at least one of ethyl lactate (EL), ethyl-3-ethoxy propionate (EEP) and methyl-3-methoxy (MMP). The poly alkyl alcohol derivative may be at least one of propylene glycol monomethyl ester (PGME) and propylene glycol monomethyl ester acetate (PGMEA).

A method for recovery of highly pure alkyl lactate and lactic acid is provided, which includes a step 1 for producing source liquid comprising lactic acid or ammonium lactate; a step 2 for dehydrating the source liquid product of step 1; a step 3 for producing liquid mixture by sequentially adding and stirring alcohol and acid solution to the dehydrated source liquid; a step 4 for separating and removing ammonium salt precipitation from the liquid mixture of step 3; a step 5 for producing alkyl lactate from ammonium salt-free liquid mixture by esterification reaction; and a step 6 for separating alcohol and alkyl lactate by distillation from the mixture of step 5.

The invention relates to a neutral blockage removing agent composition used for an oil recovery formation in an oilfield. The neutral blockage removing agent composition is prepared from the following raw materials in parts by weight: 30-36 parts of disodium polyepoxysuccinicate, 18-25 parts of sodium gluconate, 2-3 parts of polyethylene glycol, 2-4 parts of triethanolamine, 9-12 parts of ethyl lactate, 7-10 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 8-12 parts of amino acid sodium, 10-15 parts of activated attapulgite, 0.1-0.2 part of vanadium pentoxide, 5-7 parts of lipase, 5-8 parts of sorbitan fatty acid ester, 15-18 parts of P-hydroxy sodium sulfonate, 3-7 parts of tert-butyl hydroperoxide and 0.1-0.3 part of diethylene glycol monolaurate. The neutral blockage removing agent composition has high blockage removing speed, is neutral, is free of corrosion and can quickly dissolve material scales, asphalt sediment scales, carbonate scales, silicate scales and the like generated by an ASP flooding system; waste liquid for blockage removal can be degraded and does not need to be discharged onto the ground to be subjected to sewage treatment, the formation in the oilfield is cleaned to remove the blockage, no corrosion, dead angle, precipitation or secondary well blockage is generated, and the blockage removal time does not exceed 24 hours.

The subject invention relates to a skin cream that can be used to moisturize and rejuvenate skin that has been damaged by exposure to sunlight or which has simply been affected over the years by intrinsic aging. It can also be used to slow the rate of photo-induced aging to maintain beautiful skin tone and texture over the years. It inhibits the formation of wrinkles and in some cases reduces the depth of existing wrinkles or eliminates them entirely. In some cases, the skin cream of this invention also lightens age spots and other types of blemishes associated with aging. This invention is based upon the discovery that alkyl lactates, such as ethyl lactate, can be used to improve the penetration of active ingredients in skin care formulations deep into lower layers of the skin tissue. For instance, ethyl lactate can be included in aqueous based skin creams, such as oil in water emulsions, to deliver active ingredients deep into the skin structure. Ethyl lactate is particularly desirable for utilization in conjunction with ascorbic acid (Vitamin C) containing skin cream formulations. This is beneficial because the overall effectiveness of skin creams that utilize ascorbic acid as an active ingredient is contingent upon delivery of the ascorbic acid through the outer layers of the stratum corneum and viable epidermis and into the dermis layer of the skin structure. The present invention more specifically discloses a topical formulation comprising about 1 weight percent to about 20 weight percent ascorbic acid, about 1 weight percent to about 10 weight percent of an amino acid selected from the group consisting of phenylalanine and tyrosine, about 0.5 weight percent to about 5 weight percent of a non-toxic zinc salt, about 0.01 weight percent to about 20 weight percent of an alkyl lactate, wherein the alkyl group in the alkyl lactate contains from 2 to about 12 carbon atoms, and a pharmaceutically acceptable carrier.

An environmentally safe fungicide and its method of use are disclosed. The inventive environmentally safe fungicide comprises an effective concentration of an alkyl ester of lactic acid. Ethyl lactate is a preferred alkyl ester of lactic acid. Reduction in fungal contamination is achieved by applying the fungicide of the invention to a substrate to be decontaminated.

The invention belongs to the technical field of white-wine brewing processes. In order to solve the problems of low wine production rate and ethyl-acetate / ethyl-lactate rate in summer in the solid fermentation process of the traditional faint-scent white wine, the invention provides a production method for brewing the faint-scent white wine by fermentation of multi-strain enhanced yeasts. The production method comprises the steps of utilizing fresh fermented grains of fen wine to screen wine-brewing yeasts with high ester yield, rhizopus oryzae for producing amylase, acid-resistant and alcohol-resistant monascus fulginosus and high-temperature-resistant bacillus subtilis with the activities of protease and amylase and prepare wine yeast for producing the wine-brewing yeast, bran koji for producing the rhizopus oryzae, rice koji for producing the monascus fulginosus and bacteria solution for producing the bacillus subtilis, then adding into grains together with the yeast for production by a certain proportion, putting into a jar for fermentation and thus obtaining the faint-scent white wine. The production method provided by the invention has the beneficial effects that the cost is reduced; the obtained wine is high in ethyl acetate / ethyl lactate rate, total-acid content and wine production rate and strong in ester fragrance and has faint scent, preserved fragrance and sauce feel, and tastes sourly and coolly with mellowness and softness, and the difficulties of low and uncoordinated wine fragrance, lack of mellowness and short aftertaste due to low ethyl-acetate / ethyl-lactate rate and low acidity of the faint-scent white wine are solved.

An improved acidization solution is provided which comprises water and one or more esters or polyesters of hydroxy acid or of glycerol. The solution may include, for example, ethyl lactate and pure water or a brine. The hydrolysis of the esters or polyesters occurs at a slower reaction rate than that of several other known acidization esters, such as diethyleneglycol diformate, at temperatures higher than 60° C. or even higher than 100° C. Thus, the acidization solution may be distributed substantially throughout a region in a well where acidization is required before hydrolysis is completed, despite being exposed to relatively high temperatures. The hydrolysis may result in the slow release of an acid that is capable of consuming all or most of an undesirable substance in the well, e.g., a filter cake.

The invention discloses a sacubitril intermediate and a preparation method of the sacubitril intermediate and sacubitril, and belongs to the technical field of organic synthesis of drugs. On one hand, the invention discloses a novel compound-sacubitril intermediate compound B and a preparation method thereof, and on the other hand, the invention discloses a novel preparation method of the sacubitril. The sacubitril intermediate and the preparation method of the sacubitril intermediate and the sacubitril have the following advantages that the synthesizing route is short, the product can be prepared only through four steps of chemical reactions, and the steps of existing patent routes all exceed nine steps; the dicarbonyl compound is prepared through Reformasky condensation supplied by the method, and the cost is low; a first chiral center is introduced by fully utilizing a chiral compound L-(S)-ethyl lactate which is low in cost and easy to obtain in the natural world, and the cost is low; a second chiral center is constructed through a biological enzyme catalysis technique, the optical selectivity reaches up to 99.9%, the quality is good, and the cost is low. By means of the technological means, the total yield of the prepared sacubitril is increased, and the quality of the sacubitril is improved.

The invention relates to an alcoholic drink storage utensil and a preparation method thereof. The alcoholic drink storage utensil is a ceramic product having an alcoholic drink alcoholization function and is composed of purple sand, an alcoholic drink purifying solvent, an energy activator and an environment-imitating solvent, wherein the purple sand accounts for 70-80% of the raw materials, the alcoholic drink purifying solvent accounts for 5-20% of the raw materials s, the energy activator accounts for 5-20% of the raw materials s, and the environment-imitating solvent accounts for 2-6% of the raw materials. The alcoholic drink purifying solvent contains major elements of potassium, sodium, calcium, magnesium and phosphorus and further contains zinc, iron, selenium, copper, strontium, iodine, fluorine and metasilicic acid; the energy activator can be tourmalinite or negative ion powder or a mixture of the tourmalinite and the negative ion powder; the environment-imitating solvent is diatomite. The function of the ceramic products is that parameters such as acetaldehyde, methanol, n-propanol, sec-butyl alcohol, isobutanol, n-butanol and isoamyl alcohol, and the like can be reduced to a different degree; parameters such as ethyl acetate, ethyl butyrate, ethyl lactate and ethyl caproate, and the like can be raised to different degrees. According to the invention, the alcoholic drink has good shade, virgin whiteness, no thickness, no pungent smell and no other off-flavors.

A process for brewing the light leavened spirit with refreshing fragrance features that its raw materials are more kinds of grains including sorghum grain, rice, glutinous rice, corn and buckwheat, which are respectively mixed and immersed and then steamed segmentally. Said light leavened spirit features refreshing fragrance, high contents of ethyl acetate and ethyl lactate, and agreeable taste.

The invention discloses a process for brewing high-degree aromatic grape spirit, which mainly comprises the steps of: juice and slag separation, skin and slag as well as juice fermentation, distillation, blending and the like. Compared with the prior art, in the process of the invention, grape pips in grapes are firstly removed and grape juice and a certain amount of grape pip-removed grape skin are mixed and fermented, a high-acidity and low-temperature fermentation process is adopted, thus the obtained grape spirit has quality characteristics of the grappa and the flavor of the high-qualitypure-grain white wind; the indexes of the total acid and the total ester are far higher than that of the grappa and slightly lower than that of the white wine, and the total quantity of ethyl acetateand ethyl lactate accounts for above 90 percent of the total ester quantity.

The invention discloses a brewing method of rice aromatic liquor. The method is described as following: after being steamed and cooked, paddy is spread, cooled and inoculated in raw starter complex wine yeast. Then semisolid is fermented under a constant temperature of 38-41 DEG C, after which the rice aromatic liquor is made by blending the distilled fermentation broth. The brewing method of the invention adopts cooked paddy for fermentation, increases the rice aromatic flavour to the rice aromatic liquor. Compared with traditional rice fermentation method, the brewing method of the invention improves wine yield rate, prolongs fermentation period, and has more flavour substances (total acid, total ester, ethyl lactate, beta-phenylethyl alcohol) in liquor finished product in different extent than the falvour substances in traditional liquor finished product.

The invention discloses a multi-grain fen-flavor liquor and a preparation method thereof and belongs to the technical field of wine brewing. The problem that fen-flavor Xiaoqu wine is not enough in flavor and mellowest taste in the prior art is solved. The multi-grain fen-flavor liquor consists of the following components in parts by weight: 65-75 percent of tartary buckwheat, 1-10 percent of rice, 2-12 percent of sticky rice, 3-13 percent of sorghum, 1-10 percent of corn, 1-8 percent of pea and 1-7 percent of lima bean. The invention also provides a method for preparing the multi-grain fen-flavor liquor. The liquor is brewed by seven grains, so that the liquor is high in content of ethyl acetate and ethyl lactate, extremely low in fusel oil content, strong in fen-flavor and excellent in mellowest taste.

Methods for extraction of carotenoids from carotenoid-containing plant material using an extraction solvent comprising ethyl lactate. The invention is also directed to products obtained thereby. In the method, a sample of dry, particulate carotenoid-containing plant material is contacted with the ethyl lactate extraction solvent to extract the carotenoids. The method also includes the use of an ethyl lactate-ethanol blend as the extraction solvent. After extraction, the solvent containing the extracted carotenoids is separated from the extracted plant solids and treated to separate the dissolved carotenoids from the extraction solvent and obtain a carotenoid-containing concentrate. The concentrated carotenoid product may be used directly or may be subjected to further treatment. After removal of the dissolved carotenoids, the extraction solvent can be recycled for further use.

A method comprises the following steps: Step 1, mixing chromium-contaminated soil and lime sulphur and uniformly stirring to carry out a reaction so as to reduce the content of hexavalent chromium in the chromium-contaminated soil to less than 200mg / kg to obtain restored soil, wherein the mass ratio of hexavalent chromium in the chromium-contaminated soil to lime sulphur is 1:1-5; and Step 2, adding an aqueous solution of ethyl lactate into the stored soil obtained from the Step 1, uniformly stirring, culturing for 50 days or more so as to obtain restored soil, wherein 10-200 ml of the aqueous solution of ethyl lactate is added into 1 kg of the restored soil; and mass concentration of the aqueous solution of ethyl lactate is 1%. The restoration method has low cost and is environmentally friendly. By the restoration method, defects that technologies such as a traditional chemical reduction method, a chemical cleaning method and the like have high cost and are easy to produce secondary pollution are overcome.

The invention discloses a method for recovering plants in soil subjected to heavy metal cadmium pollution, and belongs to the field of soil pollution control in environmental protection. The method comprises the following steps: (A) periodically measuring the content of cadmium in the soil, and grafting willow; and (B) after the willow is grafted for two months, adding chemical enhancer consisting of ethyl lactate and ethylene diamine tetraacetic aid into the soil. In the step A, the willow is selected from Jiangsu willow clone J1011, and the planting density of the willow is between 4 and 6 strains every square meter when the content of the cadmium in the soil is 6 milligrams in every kilogram of soil. The method can overcome the defects of short and small strains, low growth rate, small amount of ground biology, and the like during recovery of the plants polluted by the heavy metal cadmium, improve recovery efficiency by singly using organic ligand as a chelate extracting agent to recover the heavy metals, has lower recovery cost, and reduces the use level of synthetic chelating agent such as EDTA by using the ethyl lactate so as to reduce environmental risk for recovering the heavy metal cadmium in the soil by extracting the plants.

The invention relates to a chemical enhanced phytoremediation method of polycyclic aromatic hydrocarbon-cadmium pollution soil, belonging to the field of soil pollution regulation; the method comprises the following steps: (A) the content of cadmium, polycyclic aromatic hydrocarbon, phenanthrene and pyrene in the soil is measured, and willow sowing is carried out; (B) chemical enhancer constitutedby ethyl lactate and ethylene diamine tetraacetic acid is added after the willow is sewed for four months. The willow is golden silk willow J1022, and the planting density of the willow is respectively 4-6 per square meter in the soil which has 5mg phenanthrene, 50mg pyrene and 6mg cadmium in one kilogram. The method avoids the disadvantages of short and small plant, slow growing speed, and low living weight at the upper part of the soil in the phytoremediation, reduces the environment risk of heavy metal cadmium in the plant extraction soil remediation; the adding of the chemical enhancer improves the remediation efficiency that an organic ligand is singly used as chelating solvent extraction agent to remediate the heavy metal, and the remediation effect of polycyclic aromatic hydrocarbon of organic pollutants in the soil is enhanced at the same time, and the remediation of cadmium and polycyclic aromatic hydrocarbon combined pollution in the soil is realized at the same time.

The invention discloses an eluent for the remediation of metal Cu contaminated soil and a leaching method, pertaining to the field of soil environment remediation. The eluent for the remediation of metal Cu contaminated soil comprises the ethylenediaminedisuccinic acid EDDS and ethyl lactate with the wt proportion by 1: 1-25. The remediation method is that the content of metal Cu in the contaminated soil is tested primarily; the metal Cu contaminated soil is put into a leaching column; the EDDS and ethyl are mixed to form a eluent, and an eluent is prepared with the proportion between eluent and soil weight by 1-50:1; (4) the prepared eluent is leached from top to bottom into the column, the leachate is collected from the bottom of the column. The EDDS of the invention has wide source and is obtained with low cost; the EDDS consumption is reduced, and the remediation cost is lowered; both the ethyl lactate and EDDS can be bio-degenerated, thereby reducing the environmental risk after leaching remediation.

A composition containing at least one essential oil, especially clove oil, and at least one of lactic acid ethyl ester and lactic acid n-butyl ester. A tuber having, on at least a part of a surface thereof, the disclosed composition. A method of applying the invention composition onto the surface of a tuber. A method of contacting a potato tuber “on the line” with at least one essential oil.

The invention provides positive-acting chemically-amplified photoresist compositions that can provide excellent lithographic performance as well as significantly enhanced storage stability. In one aspect, photoresist compositions are provided that comprise a solvent that is free of hydroxy groups (i.e. non-hydroxylic solvent), a resin binder and a photoactive compound that exhibits enhanced and long-term solubility in the solvent. In a further aspect, resists are provided that are formulated in a hydroxyl-containing solvent such as ethyl lactate and that contains a sulfonium salt photoactive compound that includes a sulfonate counter anion that can provide enhanced storage stability for the resist.

The invention discloses a brewing method used for fermenting tartary buckwheat wine through mixing Daqu and Xiaoqu and belongs to the field of wine spirit brewing. The brewing method comprises the following steps: tartary buckwheat is soaked for 19-24 h, primarily steamed, eluted, secondarily steamed and spread for cooling; high-temperature yeast, whose weight is 1-4% of that of the tartary buckwheat, is added; the Xiaoqu, whose weight is 0.6-1.0% of the tartary buckwheat, is added; the combination is saccharified for 20-30 h; a vinasse is put in a storage cavern; yellow wine, whose weight is 1-3% of the tartary buckwheat, is sprinkled on the vinasse; the vinasse is covered by lotus leaves and fermented for 15-20 d, and distilled to obtain the tartary buckwheat wine. According to the invention, compared with Daqu liquor, the tartary buckwheat wine has the advantages of little yeast consumption amount and short fermenting cycle; compared with Xiaoqu liquor, the content of total acids and total esters is high, the brewed wine has no overwhelming scent, has little stimulation, tastes mellow, and is enriched with 15 amino acids, the highest content of ethyl acetate is 140 mg / 100 ml, and the highest content of ethyl lactate is 192 mg / 100 ml.

The invention relates to a heatproof anticorrosion wear resistant powdery paint, a preparation method and an application. The powdery paint comprises the following raw materials by weight: 80-100 parts of phenol novolac epoxy, 25-35 parts of bisphenol A-epoxy resin matrix, 4.0-5.5 parts of dicyandiamide, 80-120 parts of cast stone powder, 10-40 partsof polypropylene, 5-8 parts of graphite, 5-8 parts of component A, 2-5 parts of aluminum hydroxide, 1-3 parts of magnesium oxide, 5-7 parts of ethyl lactate, 1-3 parts of polyvinyl butyral, 5-8 parts of copper oxide, 1-5 parts of carbon nanotube, 0.1-2 parts of 2,4,5-trichlorobenzene sulfonate, 0.2-1 part of potassium perfluorobutanesulfonate and 0.1-0.4 parts of phenylsulfonyl benzene sulfonic acid potassium. According to the invention, phenol novolac epoxy is taken as a base, the bisphenol A-epoxy resin matrix is added, the carbon nanotube is added in the anticorrosion paint, the heatproof and anticorrosion performances of the paint can be enhanced, and the coating process is simple.