44 results about "1,2-Butanediol" patented technology

The invention relates to a method for separating glycol and 1,2-butanediol, which mainly solves the problems of high investment and energy consumption due to the fact that a very high reflux ratio and very high number of theoretical plates are required when a common rectification method is employed to separate and purify a material flow containing glycol and 1,2-butanediol, and severe separation conditions or a non-ideal separation effect when a common azeotropic rectification method is employed. The method better solves the problem by employing the technical scheme that the material flow containing glycol and 1,2-butanediol and a reactor enters from the upper part and the lower part of a reaction-azeotrope rectification tower respectively, a generated reaction product forms an azeotrope with glycol at the same time, a tower kettle obtains a material flow containing 1,2-butanediol, and after the azeotrope distilled from the tower top is subjected to condensation phase splitting, a glycol-rich phase at the lower layer is further refined to form a glycol product. The method can be used for industrial production of separating the material flow containing glycol and 1,2-butanediol.

The invention discloses a synthetic method of polyethylene glycol terephthalate from biomass glycol. The glycol is prepared in to biomass through a chemical conversion method, and subjected to synthesis polyester reaction with terephthalic acid, wherein a catalyst is a composite catalyst. The biomass glycol and terephthalic acid in the molar ratio of 1.2:1-1.5:1 are added into a reaction kettle for esterification, wherein a stabilizer is triphenyl phosphate; and finally obtained by a condensation polymerization is carried out to obtain the polyester. glycol accounts for 95%-99.9% in the biomass glycol, and the trace alcohols are ethanol, 1, 2-propylene glycol, 1,2-butanediol, 1,2-pentadiol and 1,2-hexanediol. The technology of the invention is mainly to solve the influence of fusel on PET synthesis, and can synthesize PET polyester with quality standards satisfied from fusel-containing glycol.

The invention relates to a separating method for ethylene-glycol and 1,2-butanediol and mainly solves the problems that when the ethylene-glycol and the 1,2-butanediol are separated and purified in the prior art, a common precise distillation method requires very high reflux ratio and theoretical plate number, resulting in large investment and high energy consumption; an azeotropic distillation method is harsh in separation condition and undesirable in separating effect. According to the method adopting the technical scheme that material flow containing the ethylene-glycol and the 1,2-butanediol enters into an azeotropic rectification column from the lower part and an azeotropic agent enters the azeotropic rectification column from the top to obtain an azeotrope of the ethylene-glycol and the azeotropic agent at the top, the material flow containing the 1,2-butanediol is obtained in a tower kettle; after the azeotrope is subjected to condensation and phase-splitting, the azeotropic agent-rich phase at the upper layer returns to the azeotropic rectification column and continues performing azeotropic reaction while an ethylene-glycol-rich phase at the lower layer is subjected to refining to obtain the ethylene-glycol product, and the problems are well solved. Therefore, the method can be used for industrial production for separating the ethylene-glycol and the 1,2-butanediol.

The invention relates to a method for separating ethylene glycol and 1,2-butanediol, and is used for mainly solving the problem of high separation energy consumption in the prior art. The problem is better solved by adopting the technical scheme that the method includes the following steps: a) coarse ethylene glycol enters a product tower, an azeotrope of 1,2-butanediol and ethylene glycol is obtained at the tower top, and ethylene glycol is obtained at a tower kettle; b) the azeotrope of 1,2-butanediol and ethylene glycol enters an azeotropic rectification tower, an azeotropic agent is added from the tower top of the azeotropic rectification tower, an azeotrope of ethylene glycol and the azeotropic agent is obtained at the tower top, and the 1,2-butanediol product is obtained in the tower kettle; c) the azeotrope of ethylene glycol and the azeotropic agent is condensed, then enters a phase splitter, and is divided into an upper-layer material flow rich in the azeotropic agent and a lower-layer material flow rich in ethylene glycol; the upper-layer material flow returns to the tower top of the azeotropic rectification tower; and d) the lower-layer material flow enters an azeotropic agent recovery tower, a tower top material flow is circulated to the azeotropic rectification tower, and a tower kettle material flow is circulated to a product tower. The method can be used in industrial production of separation of ethylene glycol and 1,2-butanediol.

The invention relates to a method, a process and an apparatus for separation of ethylene glycol and 1,2-butanediol. The method includes, (1) subjecting ethylene glycol and 1,2-butanediol to reaction through acetal/ketal to produce acetal/ketal liquid product mixture correspondingly, (2) separating the acetal/ketal liquid product mixture containing ethylene glycol and 1,2-butanediol by a series of rectifying columns, (3) separating different acetal/ketal products by rectifying according to difference of boiling points of acetal or ketal, (4) respectively hydrolyzing the acetal/ketal products to obtain an ethylene glycol primary product and a 1,2-butanediol primary product, and (5) purifying the ethylene glycol primary product and the 1,2-butanediol primary product respectively by rectifying to obtain an ethylene glycol product and a 1,2-butanediol product. The purity of the ethylene glycol product can be up to 99.9% and the recovery thereof can be up to 99.5%; the purity of the 1,2-butanediol product can be up to 98.5%. By a reversible-reaction conversion method, the difficulty in separating ethylene glycol and 1,2-butanediol which are of similar boiling points and low relative volatility and are azeotropic is changed into the problem about separation of acetal/ketal products which are easy to separate relatively.

The invention relates to a separation method, technique and device of ethylene glycol and 1,2-butanediol. The method comprises the following steps: reacting a diol mixture and aldehyde or ketone in a reaction rectification tower by acetal or ketal reversible reaction to generate an acetal/ketone mixture, rectifying to separate the acetal/ketone mixture, and carrying out reaction, rectification and hydrolysis to obtain the high-purity ethylene glycol and 1,2-butanediol products. By using the technique for separation and purification, the purity of the main product ethylene glycol can reach 99.9% or above, the recovery rate can reach 99.5% or above, and the purity of the 1,2-butanediol product can reach 98.5% or above. By using the reaction rectification method, the difficulty in separating azeotropic ethylene glycol and 1,2-butanediol with approximate variable boiling point and low relative volatility becomes the problem of separation of the separable acetal/ketone product, thereby effectively implementing the high-efficiency separation on the ethylene glycol and 1,2-butanediol.

The invention relates to a method with a heat integration function for separating ethylene glycol from 1,2-butylene glycol, which is mainly used for solving the problem of high energy consumption existing in the prior art. According to the method disclosed by the invention, a technical scheme adopting a process flow including a first separating tower C1, a second separating tower C2, a third separating tower C3 and a fourth separating tower C4 is used, wherein a part of heat needed by the first separating tower C1 comes from a material flow 7 of the third separating tower 3 and the other part of heat needed by the first separating tower C1 comes from a tower kettle reboiler E0 of the first separating tower C1, and thus the problem is well solved. The method can be applied to industrial production for separating the material flow containing ethylene glycol and 1,2-butylene glycol.

The invention discloses a separation method and a separation device of a synthesis gas ethylene glycol product. The separation method comprises the steps of 1), allowing the raw synthesis gas ethylene glycol product to enter an effluent fraction tower, obtaining a light component, a mixture of methyl glycolate and dimethyl oxalate, and a heavy component respectively, 2), allowing the light component to enter a dividing wall rectifying tower, extracting methanol from the tower top, extracting an ethanol solution containing little water from a side line, 3), allowing the mixture containing methyl glycolate and dimethyl oxalate to enter a common rectifying tower, extracting methyl glycolate from the tower top, extracting dimethyl oxalate from a tower kettle, 4), allowing the heavy component to enter a scraper molecular evaporation tower I, extracting ethylene glycol from an inner wall of the tower, extracting a mixture of 1,2-propylene glycol and 1,2-butanediol from an outer wall, allowing partial mixing solution to return to the scraper molecular evaporation tower I, allowing partial mixing solution to return to a scraper molecular evaporation tower II, and 5), extracting 1,2-propylene glycol from an inner wall of the scraper molecular evaporation tower II, and extracting 1,2-butanediol from an outer wall of the scraper molecular evaporation tower II. According to the method and the device, each product is separated effectively, and the method has the characteristics of simple technology and low energy consumption.

The invention discloses a preparation method of epoxybutane. The preparation method comprises the following steps: performing reactive distillation on an ethanediol and 1,2-butanediol-containing raw material and an esterifying agent under the action of an esterifying catalyst to respectively obtain a light component containing a reaction product corresponding to the esterifying agent and a heavy component containing ethylene carbonate and butylene carbonate, rectifying the heavy component containing the ethylene carbonate and the butylene carbonate to respectively obtain the ethylene carbonateand the butylene carbonate, and decarboxylating the butylene carbonate under the action of a decarboxylating catalyst to obtain the epoxybutane. According to the preparation method of the epoxybutane, the ethanediol and 1,2-butanediol-containing raw material and the esterifying agent are subjected to ester exchange reaction, so that 1,2-butanediol is converted into the butylene carbonate which isnot azeotropic with ethanediol to purify the ethanediol, and the butylene carbonate obtained by the conversion of the 1,2-butanediol is decarboxylated to obtain the epoxybutane with a relatively highadditional value.

Inkjet ink contains water, hydrosoluble organic materials; and a colorant, wherein the hydrosoluble organic materials account for 30% by weight to 50% by weight of the inkjet ink, wherein the hydrosoluble organic materials contain 3-methoxy-1-butanol, herein the hydrosoluble organic materials contain at least one of 1,3-butane diol, 3-methyl-1,3-butane diol, 1,2-butane diol, 2,3-butane diol, 1,2-pentane diol, 3-methyl-3-hydroxymethyl oxetane, 1,2-propane diol, or 1,3-propane diol in an amount of 1% of the inkjet ink.

The invention discloses a method for removing dihydric alcohol or polyol impurities in glycol and increasing the yield of glycol. According to the method, glycol containing dihydric alcohols or heteropolyols (such as 1,2-butanediol) is used as a raw material; under the action of a protonic acid catalyst, dihydric alcohols or heteropolyols undergoes a dehydration reaction, a secondary in-depth dehydration reaction, an acetalation reaction; and heteroalcohols are totally converted into low-boiling-point products which are separated through distillation and condensation. Acetal in the low-boiling-point products is subjected to a hydrolysis reaction so as to produce glycol, trace heteroalcohols and aldehydes; and glycol and heteroalcohols are separated through simple distillation and returned to an in-depth dehydration reaction vessel, so the yield of glycol is increased. Meanwhile, the trace heteroalcohols are further converted in the in-depth dehydration reaction vessel; a crude glycol product having undergone two-step dehydration does not contain dihydric alcohol or polyol impurities; and since rectification for separation of the dihydric alcohol or polyol impurities with boiling points close to the boiling point of glycol is not needed, the number of rectifying towers in the whole separation flow and energy consumption are substantially reduced.

The invention discloses a production method of cotton-like knitted fabric. The production method includes the steps of 1, making all-biomass polyester chips from, by weight, 9-8 parts of 1, 2-propanediol, 3-5 parts of 1, 2-butanediol, 4-6 parts of pentanediol, 2-4 parts of sorbitol, 3-5 parts of ethanediol, 16 parts of bio-base 1, 3-propanediol, and 1 part of bio-base 2, 5-furan diacid; 2, subjecting the all-biomass polyester chips to melt spinning at the spinning temperature of 310DE C, at the spinning speed of 1550m/min, at the drawing temperature of 90DEG C, under the pre-drawing ratio of 1.5, under the primary drawing ratio of 4-5, and under the secondary drawing ratio of 2-3, so as to obtain all-biomass polyester fiber; 3, knitting warps and wefts containing the all-biomass polyester fiber into the cotton-like knitted fabric. The knitted fabric produced by the production is more compatible with the human body and meets the requirements for health and environment protection.

The invention relates to a technology for efficiently purifying glycol obtained through oxalate hydrogenation. The technology is characterized in that LNG (Liquefied Natural Gas) low-temperature liquid is subjected to heat exchange through a heat exchange unit, after the temperature of the LNG low-temperature liquid rises to a room temperature, the LNG low-temperature liquid is liquefied, and then the liquefied LNG low-temperature liquid is conveyed to a natural gas application place outside battery limit through a natural gas conveying pipeline; a glycol crude product prepared through high-temperature high-pressure oxalate hydrogenation passes through the heat exchange unit in a direction opposite to the conveying direction of the LNG low-temperature liquid through the conveying pipeline, is precooled through the heat exchange unit and is subjected to auxiliary refrigeration through auxiliary refrigeration equipment, and after the temperature of the crude product is reduced to minus 5 DEG C to 5 DEG C, the crude product is conveyed to a separation unit through the pipeline; after the temperature of the crude product in the separation unit is reduced to minus 20 DEG C to minus 40 DEG C through freezing-separation equipment, liquefied 1, 2-propylene glycol and 1,2-butanediol serve as byproducts to be separated and recycled, and the solid glycol is directly collected, or after the glycol is heated to liquid state, the liquid glycol pure product is collected. According to the technology, the impurities, namely the 1,2-propylene glycol and the 1,2-butanediol in the glycol are separated by virtue of the characteristics of difference in solidifying points, the high-purity glycol is obtained, the productivity is high, and the cold energy of LNG is fully utilized.

A cosmetic composition suitable for topical application is provided. In some examples, the cosmetic composition can include glycerin, hexyldecanol, a vitamin B compound, and one or more materials selected from the group consisting of 1,2-pentanediol, 1,4-pentanediol, 2,4-pentanediol, 1,5-pentanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 1,2-hexanediol, 1,5-hexanediol, 1,6-hexanediol, 2,5-hexanediol, hexylene glycol, and combinations thereof.

The invention discloses an emulsion for a bletilla striata nutritive mask, the bletilla striata nutritive mask and a preparation method of the bletilla striata nutritive mask. The emulsion for the bletilla striata nutritive mask is prepared from deionized water, 1,2-butylene glycol, glycerin, glycerin tricaprylate, bletilla striata extract, glyceryl stearate, polyethylene glycol-100 stearate, hydroxyethyl acrylate/sodium acryloyldimethyltaurate copolymer, isopropyl isostearate, 2,2,4,4,6,8,8-heptamethylnonane, pectin, polysorbate-60, ethylenediaminetetraacetic acid tetrasodium salt, nisin and iodopropynyl butylcarbamate. The invention also discloses the bletilla striata nutritive mask comprising the emulsion and a fiber mask. The bletilla striata nutritive mask is suitable for all skin types, has excellent moisture retention performances, has effects of resisting aging and crease, can obviously relieve facial acne melanin and has the function of whitening.

The invention discloses a separation method of a mixture of polyols with similar boiling points. Glycol containing dihydric fusels (1,2-butylene glycol and 1,2-butylene glycol) is adopted as the feedstock of a reduced pressure rectifying tower, and a weakly polar gaseous extraction agent is introduced to the bottom of the tower, so relative volatility between the 1,2-butylene glycol and 1,2-butylene glycol which have the same weak polarity and the glycol with strong polarity is improved, and the separation efficiency of rectification is improved. The invention provides a novel rectification method of the dihydric fusels from the glycol. The boiling point of the gaseous extraction agent is far lower than that of the dihydric alcohols, and the gaseous extraction agent is easy to separate and can be recycled, so the material consumption and the energy consumption in the separation process are reduced. The method allows the 1,2-butylene glycol and 1,2-butylene glycol to be separated from the glycol, and allows highly pure glycol and concentrated 1,2-butylene glycol and 1,2-butylene glycol byproducts to be obtained.