202 results about "Phenolphtaleine" patented technology

Disclosed herein is a method for producing a 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. The method comprises forming a reaction mixture comprising at least one substituted or unsubstituted phenolphthalein, at least one substituted or unsubstituted primary hydrocarbyl amine, and an acid catalyst; and heating the reaction mixture to a temperature of less than 180° C. to remove a distillate comprising water and form a crude 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine product; where the 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine has a formula: where R1 is selected from the group consisting of a hydrogen and a hydrocarbyl group, and R2 is selected from the group consisting of a hydrogen, a hydrocarbyl group, and a halogen.

The invention discloses bifidobacterium bifidum capable of remarkably relieving constipation and application thereof and belongs to the technical field of microorganisms. The bifidobacterium bifidum CGMCC NO.13632 can well tolerate simulative gastrointestinal fluid, can be well attached to colon cancer cells HT-29, and can remarkably increase the water content of excrement of constipation mice and shorten the first tarry stool time. On the aspect of increasing the small intestine driving rate, the bifidobacterium bifidum CGMCC NO.13632 is superior to cathartic phenolphthalein, a best effect is shown, secretion of gastrointestinal regulatory peptide relevant to constipation in serum is also adjusted while constipation pathological factors are remarkably improved, and the bifidobacterium bifidum does not have toxic and side effects of medicine for treating constipation, and is a first choice for preventing and treating constipation. The bifidobacterium bifidum CGMCC NO.13632 is used for preparing pharmaceutical compositions and fermented food for relieving constipation, and has very wide application prospects.

Disclosed herein is a method for producing a 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. The method comprises forming a reaction mixture comprising at least one substituted or unsubstituted phenolphthalein compound, at least one substituted or unsubstituted primary hydrocarbyl amine, and an acid catalyst; and heating the reaction mixture to form 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. An adduct of the 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine is formed either by using an excess of the primary hydrocarbyl amine in the first heating step, or by isolating crude 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine after the heating step and then reacting with a further amount of the primary hydrocarbyl amine. The 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine has a formula:where R1 is selected from the group consisting of a hydrogen and a hydrocarbyl group, and R2 is selected from the group consisting of a hydrogen, a hydrocarbyl group, and a halogen.

Method for detecting a basic target species in a fuel composition, by (i) adding a spectroscopically active indicator which is capable of reacting with the target species, and (ii) detecting the spectroscopic response (suitably a colour change) of the fuel composition to the presence of the indicator. The method may be used to detect an additive such as a detergent or dispersant additive, in particular in an automotive gasoline or diesel fuel or a lubricating oil. Also provided is a kit for carrying out the method, in particular in the field. The indicator may be a phenolphthalein indicator such as tetrabromophenolphthalein ethyl ester (HTBPE).

The invention relates to carboxyl-side-group-containing polyarylether copolymers and a preparation method thereof, and application of the copolymers in the aspect of ultrafiltration membrane hydrophilic modification, belonging to the technical field of ultrafiltration membrane preparation. By adopting nucleophilic polycondensation and one-step feeding, the mole ratio of the phenolphthalin bisphenol monomer to the total bisphenol monomer is changed to prepare a series of polyarylether copolymers with different carboxylation degrees; and the polyarylether copolymers are used as the membrane material preparation membrane casting solution to prepare a series of ultrafiltration membranes by an impregnation precipitated-phase conversion process. The hydrophilicity and water flux of the carboxyl-side-group-containing modified polyarylether ultrafiltration membranes are obviously enhanced. The modified monomer phenolphthalin can be obtained only by hydrolyzing / reducing phenolphthalein, so the experimental operation is simple, and the raw material price is low. In addition, the technique has the advantages of enduring chemical hydrophilic modification, high repetitiveness and the like, and is easy to operate.

The invention relates to a new fluorine polyaryletheretherketone soluble high-performance material, process for preparation and the blend film material formed by the epoxide resin. The process for preparation comprises the following procedures: regarding 4,4'- difluorobenzophenone or 4,4'-difluorotribenzodiketone and mixing bisphenol monomer as the material; controlling the proportion of bisphenol hexaflurate A ( or trifluoromethyl phenyl eldopaque) and bisphenol A ( or fenolftaleina) in the segment of polymer via the way of nucleophilic substitution reaction; getting the new fluorine polyaryletheretherketone soluble high-performance material; furthermore, selecting the immobilized liquid epoxide resin and the functional polymer blend film prepared by the new fluorine polyaryletheretherketone soluble high-performance material in order to achieve the functionalization of polyaryletheretherketone material for meeting the aim of the different applying range and extending the processing window. The blend film material is suitable for high-performance composite material resin base field, microelectronic insulating material field, optical waveguide device field and air permoselective membrane field and the like.

The invention discloses a hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane and a preparation method thereof. The preparation method comprises that phenolphthalein polyaryl ether ketone and high-molecular weight polyvinylpyrrolidone are used as main membrane-preparation materials; a membrane casting liquid is prepared by a solution blending method; a hollow fiber ultrafilter membrane is prepared by a dry-wet phase inversion technology; and the hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane having lasting hydrophily is prepared by hydrophilic effect-persistence aftertreatment. The preparation method has simple processes, is convenient for operation, does not need special equipment and is conducive to industrial production and application. The hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane obtained by the preparation method has high temperature resistance, chemical solvent resistance, acid and basic corrosion resistance, and lasting, stable and excellent hydrophily. In oil-containing waste water treatment, the hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane has high membrane flux, obvious oil removal effects and strong oil pollution resistance and is suitable for high-efficiency treatment on oil-containing waste water.

The invention discloses a supramolecular structure phenolphtalein or its analog-inserted UV blocking material and a preparation method thereof. The preparation method comprises that nitrate-inserted magnesium-aluminum hydrotalcite is used as a precursor, and phenolphtalein or its analog is inserted between layers of the nitrate-inserted magnesium-aluminum hydrotalcite precursor by an ion exchange method so that the phenolphtalein or its analog-inserted magnesium-aluminum hydrotalcite with a good crystal structure and excellent performances is assembled. The supramolecular structure phenolphtalein or its analog-inserted UV blocking material has a 220-400nm band UV blocking rate higher than 95%, has excellent UV blocking performances, widens a UV blocking agent use range, can be used as additives of polymers such as asphalt, plastic and rubber, greatly improves UV-caused ageing resistance and prolongs a service life.

A hollow-fibre ultrafiltration membrane able to resist high temp, solvent, acid, alkali and oxidizing is prepared from the polyarylether sulfone (PES-C) or polyarylether ketone (PEK-C) containing the phenolphthalein as side radial. Its shaping process and technological conditions are also disclosed.

The invention provides an analysis method for polyether polyol hydroxyl value, which comprises the following steps: A, weighing a polyether polyol test sample m into a conical flask, and taking another empty conical flask; B, transferring a phthalic anhydride pyridine solution into the test sample accommodated conical flask and the empty conical flask respectively, placing the two conical flasks in an oscillation oil bath pan, and connecting the two conical flasks with an air condensation pipe for reaction; C, after reaction, taking the two conical flasks out of the oil bath pan for cooling; D, flushing the two conical flasks with deionized water and acetone in sequence, and oscillating the two conical flasks to mix the solutions completely; E, adding a sodium hydroxide aqueous solution into the two conical flasks respectively, and adding a few drops of phenolphthalein indicator; F, titrating the solutions in the two conical flasks with potassium hydroxide standard solution until the solutions in the two conical flasks changes into pink; and G, calculating out the polyether polyol hydroxyl value as per a formula. The method is simple in analysis procedure, has high precision and accuracy, can efficiently shorten detection period, lower experimental cost, and bring certain economical benefits to an enterprise.

The invention relates to a quick screening method of phenolphthalein doped in Chinese patent medicine, health-care products and food for losing weight. The quick screen method comprises the followingsteps: (1) preparing sodium hydroxide solution with the concentration of 0.47mol / L to 0.53mol / L; (2) dissolving a sample by ethanol solution with the volume concentration of 90% to 96%, filtering andtaking filtrate; and (3) dropping 2 to 5 drops of filtrate into the sodium hydroxide solution and judging whether the phenolphthalein is added to the sample or not according to the change of colors. The invention also discloses a special reagent kit for implementing the screening method, comprising the ethanol solution with the volume concentration of 90% to 96% and the sodium hydroxide solution with the concentration of 0.47mol / L to 0.53mol / L. The detecting method is suitable for quickly screening whether the phenolphthalein is doped in the Chinese patent medicine, the health-care products and the food or not on site for basic medicine supervision personnel and has the advantages of low cost, simple operation, high sensitivity and the like.

The invention provides a preparation method of a nanofiltration membrane. The method comprises the following steps: A) mixing a polymer with a solvent and a cosolvent to obtain a polymer solution; and B) pouring the polymer solution to a support surface, scraping the membrane, and carrying out phase inversion on the primary membrane in a coagulation bath water solution, wherein the polymer is prepared by carrying out reaction on organic halide and phenolphthalin, and the organic halide is selected from one or both of dichlorodiphenylsulfone and difluorodiphenylketone, or tetrafluorodiphenylsulfone. The polyether sulfone or polyaryletherketone containing carboxyl in the side chain is used as the raw material to prepare the novel hydrophilic nanofiltration membrane by the non-solvent-induced phase inversion process. The nanofiltration membrane can be used for dye-containing wastewater decolorization, dye recovery and purification and other water treatment processes. The result indicates that the nanofiltration membrane has higher separation efficiency and staining resistance for negatively charged dyes dissolved in the water body.

The invention discloses a method for determining content of p-toluenesulfonic acid in a butyl acrylate reaction kettle. The method for determining the content of p-toluenesulfonic acid in the butyl acrylate reaction kettle comprises the following steps: adding absolute alcohol and a phenolphthalein indicator into a triangular flask, titrating to be reddish with a sodium hydroxide solution, accurately weighing a certain quantity of samples into the triangular flask, titrating to be reddish with a sodium hydroxide standard solution, and recording volume consumed at the moment; correcting acrylic acid by virtue of an external standard method by adopting an automatic sampling gas chromatograph, accurately determining mass percentage of acrylic acid in the samples, and carrying out reverse calculation to obtain volume of sodium hydroxide consumed by acrylic acid according to an acrylic acid calculation formula; subtracting to obtain volume of sodium hydroxide consumed by p-toluenesulfonic acid, and obtaining mass percentage of p-toluenesulfonic acid according to a p-toluenesulfonic acid calculation formula. The method disclosed by the invention has the advantages that the content of p-toluenesulfonic acid in the butyl acrylate reaction kettle can be accurately determined, and a great effect on stably controlling the content of a reaction kettle catalyst is realized.

The invention discloses a modified nano cobalt ferrite / arylene ether nitrile dielectric composite material which comprises arylene ether nitrile as a substrate and modified nano cobalt ferrite as packing, wherein the modified nano cobalt ferrite is of a core-shell structure with nano cobalt ferrite as a core and a high polymer or a decomposition substance of a modifier as a shell. The invention further discloses a preparation process of the modified nano cobalt ferrite / arylene ether nitrile dielectric composite material. The process comprises the following steps: putting modified nano cobalt ferrite into DMSO (Dimethylsulfoxide), adding phenolphthalein, 2,6-dichlorobenzene nitrile, anhydrous K2CO3 and methylbenzene to carry out a reaction, carrying out dilution, precipitation, purificationand drying, and carrying out hot-pressing molding, thereby obtaining a product. Due to the core-shell structure of the dielectric composite material, the compatibility of the modified nano cobalt ferrite and the arylene ether nitrile is improved, so that the dielectric constant of the material is increased; by adopting the method disclosed by the invention, the dispersibility of the modified nanocobalt ferrite in the arylene ether nitrile is improved, so that the dielectric constant of the material is further increased, and meanwhile the mechanical properties of the material are improved.

The invention discloses wear-resisting modified polyimide composite. The modified polyimide composite comprises raw materials in percentage by mass as follows: 78%-89% of phenolphthalein type polyimide, 10%-20% of polytetrafluoroethylene, 0.01%-1% of an antioxidant and 0.01%-1% of other aids, wherein the structure formula of phenolphthalein type polyimide is shown in the formula (I), n is a positive integer, and Ar is an aromatic group with the carbon number ranging from 6 to 30. According to the wear-resisting modified polyimide composite provided by the invention, phenolphthalein type polyimide with a special structure is taken as a raw material, and polytetrafluoroethylene is used for modifying phenolphthalein type polyimide, so that the prepared composite has a smaller friction coefficient and wear rate and also has better mechanical strength and excellent heat resistance.

The invention provides a method for preparing a test paper for quickly detecting phenothalin, a detection kit and a detection method. The test paper is prepared by soaking neutral filter paper in alkaline solution at a pH value of 11 to 12, taking the filter paper out and drying the filter paper. The alkaline solution may be solution of NaOH, Na2CO3 or KOH. The test paper prepared by the method is assembled with ethanol solution to form the detection kit. The method for detecting phenothalin by using the test paper for detection comprises: adding a test product in the ethanol solution, shaking the ethanol solution and standing the ethanol solution; soaking the test paper for detection in the processed solution of the test product; and taking the test paper for detection out of the solution, wherein if the test paper shows a rose color, that the test product contains phenothalin can be determined, and if the test paper does not show a rose color, that the test product does not contain phenothalin can be determined. The test paper, the related kit and the method for quickly detecting phenothalin can quickly and accurately detect phenothalin, particularly can detect whether phenothalin is illegally added in weight-reducing Chinese patent medicaments, health-care foods and other foods in situ, are simple and convenient in operation, suitable for in-situ detection and can realize semi-quantitative detection.

The invention discloses an LiOH (lithium hydroxide) and Li2CO2 content measurement method in high-nickel ternary materials. The method includes the steps of 1), adding the high-nickel ternary materials into 5-10 mass times of ethyl alcohol, stirring under vacuum for 20-30 minutes, filtering after standing, and performing cool drying; 2), adding the high-nickel ternary materials subjected to cool drying to 5-10 times of deionized water, performing ultrasonic dispersion and taking supernatant liquid after filtration; 3), adding an indicator of 2-3 drops of phenolphthalein, performing titration with hydrochloric acid, terminating titration when solution color turns from red to colorless, and calculating the content of LiOH according to the amount of the hydrochloric acid consumed; 4), continuously adding the indicator of methyl red in the solution, performing titration by using hydrochloric acid, terminating titration when the solution color turns from yellow to red, and calculating the content of Li2CO according to the amount of the hydrochloric acid consumed. The method is simple in step, low in requirement on equipment and high in operability result accuracy.

A subsea monitoring device comprises a metal part (12) disposed in a polymeric sheath (11,14), and means (10) for providing a sensible indication of pH at an interface between the part and the sheath. The part may be the metal shell of a connector. When a cable (13) extends from the connector, adjacent the connector the cable would be covered by the polymeric sheath. The said means (10) may comprise a chemical indicator and the sheath is preferably sufficiently translucent to allow visual observation of the indicator. The chemical indicator may comprise phenolphthalein.

The invention provides a continuous fiber reinforced phenolphthalein polyaryletherketone composite prepreg tape and a preparation method thereof, and belongs to the technical field of polymer composite materials. The method comprises the following steps: dissolving phenolphthalein polyaryletherketone resin into an organic solvent to prepare a resin solution with a mass concentration of 15%-35%, dipping the continuous carbon fiber into a resin solution, and replacing the solvent by coagulating bath, heating a prepreg tape by a hot drying channel at 200DEG C-380DEG C for 30min-60min to rapidly melt the resin, compacting the prepreg tape by a hot pressing roller at 330-380DEG C under a pressure of 2-20MPa, and then conducting cooling and cutting to obtain the prepreg tape. The composite prepreg tape provided by the invention is suitable for molding large-size parts, can be used for preparing composite material parts with high fibrous body content, and has excellent mechanical properties and thermal properties.

The invention discloses a color-changing coating and a preparation system and preparation method thereof. The color-changing coating is composed of the following components in parts by weight: octyldodecanedioate phthalate, tribasic lead sulfate, polyaluminium chloride, barium carbonate, propylene glycol phenyl ether, water, a thickener and a discoloring agent according to a ratio of (10-20): (1-3): (2-5): (5-8): (7-12): (30-90): (3-5): (2-5), the thickener is composed of cyclohexane, polyvinyl alcohol, hydroxyethyl cellulose and esterified pectin liquid, and the discoloring agent is composedof methyl methacrylate, zinc phosphate, methyl violet and phenolphthalein. The method comprises the following steps: 1, respectively adding the raw material components of the thickener and the raw material components of the color-changing agent into two movable stirring pipes, and adding the rest raw material components into a stirring cavity, 2, stirring the raw materials, 3, enabling the mixtureto flow into a stirring cavity, and continuously mixing and stirring with the raw materials in the stirring cavity, and 4, completely stirring all the raw materials in a stirring cavity formed by a stirring rectangular pipe and a stirring semicircular cylinder, so that a coating is obtained, discharging the coating through a discharging pipe, and collecting it.

The invention provides a reverse osmosis membrane, a reverse osmosis membrane preparation method, the reverse osmosis membrane prepared by the preparation method, and the reverse osmosis membrane application in the field of water treatment. The reverse osmosis membrane includes a support layer, a phenolphthalein sulfonated poly aryl ether sulfone layer and a hydrophilic polymer layer which are sequentially layered, the phenolphthalein sulfonated poly aryl ether sulfone layer comprises phenolphthalein sulfonated poly aryl ether sulfone with a structure shown as formula (I), the phenolphthalein sulfonated poly aryl ether sulfone layerand the hydrophilic polymer layer are different in composition, R1 to R15 are H or C1-C5 alkyls, and n is greater than or equal to 2. The reverse osmosis membrane provided by the invention has excellent chlorine resistance, and high water flux and desalination rate. The formula (I) is shown in the specification.

The invention relates to a device and method for automatically measuring ions in water by adopting a color sensor. The device comprises a measuring cell, a stirrer arranged in the measuring cell, a standard hydrochloric acid solution supply mechanism, a phenolphthalein solution supply mechanism and a methyl orange solution supply mechanism, wherein the standard hydrochloric acid solution supply mechanism, the phenolphthalein solution supply mechanism and the methyl orange solution supply mechanism are communicated with the measuring cell. A color sensor is arranged in the measuring cell and connected with a control system through a signal panel. According to the patent, the color sensor is adopted to identify the color mutation end point, automatic titration and measurement are carried out, manual titration and manual judgment of the end point are completely replaced, related standards and methods are completely met, and the contents of carbonate, bicarbonate and hydroxide in water canbe accurately measured in real time.

The invention provides a method for determining the content of residual sodium n-alkyl benzene sulfonate in beer, which relates to the technical field of beer quality safety detection. The invention discloses a method for determining the content of residual sodium linear alkyl benzene sulfonate in beer. The test method comprises the following materials and reagents: a plurality of parts of bottled beer of different brands, a bottle washing additive, sodium hydroxide, sulfuric acid, chloroform, a sodium n-alkyl benzene sulfonate standard solution, methylene blue, phenolphthalein, ammonium acetate, malachite green, disodium hydrogen phosphate, potassium dihydrogen phosphate, sodium dihydrogen phosphate, diazaphenanthrene, sodium dodecyl benzene sulfonate, methanol, hydroxylamine hydrochloride and an anionic surfactant solution standard substance. The quality safety of the beer can be effectively ensured by determining the content of the residual sodium n-alkyl benzene sulfonate in the beer.

This invention relates to a curative composition and its use in curing epoxy resins and prepregs, adhesives and moulded materials derived therefrom. The curative composition comprises a clathrate comprising a host component and a guest component, the host comprising a carboxylic acid or ester compounds as defined or phenolphthalin and the guest comprising an imidazole or imidazoline component.

The invention provides a preparation method of a super-hydrophilic composite membrane suitable for oil-water separation in a severe environment, and the preparation method comprises the following steps: S1, mixing dichlorobenzonitrile, bisphenol A, phenolphthalein and N-methyl pyrrolidone, and carrying out dehydration azeotropy and copolymerization at a high temperature; cooling, precipitating in a precipitating agent, separating, adding diluted hydrochloric acid for acidification, and drying to obtain a PEN-COOH product; S2, preparing a membrane casting solution from the PEN-COOH product obtained in the S1, a pore-forming agent and an organic solvent, pouring the membrane casting solution on a non-woven fabric, and obtaining a PEN-COOH base membrane with a groove rough structure by using a non-solvent phase inversion method; and S3, adding dopamine, polyethyleneimine and titanium dioxide to the PEN-COOH base membrane obtained in the S2, and obtaining the PEN-COOH / TiO2 composite membrane through a bionic one-step cross-linking soaking method. The invention further provides the super-hydrophilic composite membrane suitable for oil-water separation in the severe environment, and the super-hydrophilic composite membrane still has a good oil-water separation effect in a high-temperature, strong-acid and strong-alkali environment and is long in service life.

The invention discloses a preparation method of a water-soluble polyarylether sizing agent and an application thereof; which belong to the technical field of high-performance fiber sizing agents. The preparation method comprises the following steps: mixing phenolphthalein, potassium p-hydroxybenzenesulfonate, 2, 6-dichlorobenzonitrile and potassium carbonate, carrying out temperature programming reaction in a mixed solvent to obtain a polyarylether reaction solution, mixing the polyarylether reaction solution with absolute ethyl alcohol, fully soaking, crushing, heating and washing with absolute ethyl alcohol, and carrying out vacuum drying to obtain polyarylether small molecules; and dissolving in an acetic acid aqueous solution to obtain the water-soluble polyarylether sizing agent. The sizing agent prepared by the invention has the characteristics of good film-forming property, strong adhesive force and outstanding temperature resistance, can solve the problems that the existing high-performance fiber surface sizing agent is easy to decompose at high temperature and is weak in interface bonding and bonding acting force with a thermoplastic resin matrix, improves the comprehensive performance of a fiber reinforced resin matrix composite material, and expands the application field and range of the reinforced resin-based composite material.

The invention discloses an alpha-naphtholphthalein derivative multifunctional fluorescent probe as well as a preparation method and application thereof. The structural formula of the fluorescent probe is shown as a formula (I) in the description. A compound shown in a formula (II) is synthesized from a compound shown in the formula (III), and then the fluorescent probe is synthesized. The fluorescent probe can identify and detect Hg < 2 + > and Al < 3 + > in a mixed solution of dimethyl sulfoxide and water by using a fluorescence spectrum and / or an ultraviolet-visible absorption spectrum. The fluorescent probe has high selectivity and sensitivity for identifying Hg < 2 + > and Al < 3 + >, is strong in anti-interference capability and has very low detection limit; and the fluorescent probe can be used for qualitative and quantitative detection of Hg < 2 + > and Al < 3 + > and tracing imaging detection of Hg < 2 + > and Al < 3 + > in living cells.

The invention relates to the technical field of water treatment membrane separation, and discloses a composite reverse osmosis membrane and a preparation method thereof. The composite reverse osmosis membrane comprises a supporting layer, a base membrane layer and a functional layer, the base membrane layer is arranged between the supporting layer and the functional layer, the supporting layer is polyester non-woven fabric, wherein the base membrane layer is polyaryletherketone containing phenolphthalein side group, and the functional layer is polyamide. The composite reverse osmosis membrane can keep high water flux and desalination rate at room temperature and after high-temperature treatment, and has good high-temperature resistance.