33results about How to "Avoid complexation" patented technology

The invention provides a method for the preparation of an aqueous fabric softening composition comprising;(i) at least one cationic fabric softening compound having two or more alkyl or alkenyl chains each having an average chain length equal to, or greater than, C8 and(ii) at least one oily sugar derivative,wherein the cationic fabric softening compound (i), and / or the oily sugar derivative (ii) is / are separately mixed with another active component of the fabric softening composition to form a pre-mixture prior to the admixing of the softening compound (i) with the oily sugar derivative (ii).The invention also provides an aqueous based fabric softening composition produced by the method of the invention, and, a method of treating fabrics with the composition so produced.

Thermoplastic polymer compositions, films, continues, closures, laminates can comprise a modified vinyl polymer said modified polymer having a moiety comprising a cyclodextrin compound. The cyclodextrin compound, locked into the polymer structure, can absorb impurities, permeants, or other undesirable volatile materials. The cooperation between the cyclodextrin grafted onto the thermoplastic polymer and the polymer structure can provide barrier properties to a film, web or other polymer structure. A permeant or a contaminant can be complexed or trapped within the polymer and held within the film or Web preventing the permeant or contaminant from passing into the interior of a container or enclosure.

The invention relates to a method for preparing 8-hydroxyquinoline metal compounds, in particular to a synthesis method for organic electroluminescent materials. A method for the preparation of a compound of Mqnqm', in which M is Al, Li; n is 1 to 3, m is 0-2, q is 8-hydroxyquinoline and derivatives thereof, and q' is a ligand different from q, comprises the steps of: using a hydrophobic solvent, formulating industrial ligand to a solution for being dropped into a reaction vessel, stirring at certain temperature to obtain high-purity products. By using the hydrophobic solvent, the invention can implement the reaction efficiently, shorten reaction period, avoid complicated operation and purification procedures, enhance yield and purity of the product, reduce environmental pollution and lower the cost, besides, the resultant mother liquid can be reused. The technology can be popularized to the preparation of other 8-hydroxyquinoline metal compounds, and the resultant product can serve as an electroluminescent material or an electronic transmission material.

To provide an ophthalmologic device and a pupil state measuring method capable of securing accuracy of a measurement result of objective measurement and effective for investigating the cause of an error during objective measurement. A pupil state measuring method according to the present invention includes: an ocular characteristic measuring step of objectively measuring an ocular characteristic of a subject eye of a subject; an imaging step of substantially simultaneously imaging an anterior ocular segment of the subject eye from different directions using at least two imaging units in measuring the ocular characteristic; a measuring step of analyzing at least one image of images taken by the at least two imaging units to measure a pupil state of the subject eye; and a step of performing the imaging step and the measuring step in measuring the ocular characteristic.

The present invention discloses tea polyphenol-Mn complex and its preparation process. The tea polyphenol-Mn complex is prepared through complexing polyphenol and bivalent Mn, and contains (C22H14O11)2Mn, C22H14O11Mn, (C15H12O7)2Mn, C15H12O7Mn, (C22H14O10)2Mn and C22H14O10Mn as main components. The complexing reaction has high yield. The tea polyphenol-Mn complex has both the bioactivity of tea polyphenol and biological effect of Mn, and may be used as health food additive and medicine for preventing and treating manganese deficiency disease.

The invention discloses a preparation method of a graphene oxide enhanced cement-based mortar material. According to the method, an addition manner of graphene oxide is changed. The method comprises the following steps: rapidly freezing aqueous dispersion of graphene oxide with liquid nitrogen; crushing graphene oxide dispersion ice blocks, and gradually adding standard sand and cement in the process; finally, uniformly stirring the mixture, thereby obtaining the graphene oxide enhanced cement-based mortar material. According to the method disclosed by the invention, the graphene oxide can beuniformly dispersed in a cement matrix, the complexing action between the graphene oxide and calcium ions is well solved, a flocculation phenomenon of the graphene oxide in cement paste is effectivelyavoided, and excellent performance of the graphene oxide is further fully achieved. Moreover, any other dispersing agent does not need to be added, and introduction of impurities is reduced. The method disclosed by the invention provides a novel research thought for preparation of the graphene oxide enhanced cement-based mortar material.

The invention provides a method for preparing trialkyl phosphate, belonging to the chemical engineering field. The method comprises the steps of reacting by virtue of phosphorus oxyhalide and alcoholin an ice-water bath under the protection of inert gas, cooling a system to room temperature by taking ion exchange resin as a catalyst after the reaction, carrying out reduced pressure distillation to remove redundant alcohol and hydrochloric acid, further removing alcohol and acid in the system in one step by virtue of a bubbling method so as to obtain a trialkyl phosphate rough product, and carrying out reduced pressure rectification, so as to obtain a trialkyl phosphate purified product. By utilizing the catalyst, the compexing with trialkyl phosphate is avoided, so that the adverse effects caused by the complexing between a traditional catalyst and a product are effectively avoided, and the yield and purity of the product are increased; by further removing impurities in a bubbling manner, the impurities remained in the reduced pressure distillation process are effectively removed, so that the yield and purity of trialkyl phosphate are further increased; and the total yield of theproduct is more than 95.9%, and the purity of the product is more than 99.8%.

The invention relates to a method for improving the homogeneity of a cement grinding aid, belonging to the field of cement admixtures. The method mainly comprises the following steps: (I) a water treatment process; and (II) a compounding process for the grinding aid. The water treatment process comprises the following sub-steps: 1, feeding of a purifying agent; 2, sonic treatment; 3, filtration; and 4, thickening treatment of water. Parameters in the above sub-steps are that (1) the weight percentage of the purifying agent is 3 to 10 %; (2) ultrasonic frequency is 20-35 KHZ; (3) the weight percentage of a thickening agent is 2 to 10 %; and (4) time for sonic treatment is 10 to 30 min. The compounding process comprises the following sub-steps: adding water obtained after treatment by the process (I) into a container, dissolving a salt, and carrying out sonic treatment; and successively adding alcohol amine and industrial waste, carrying out stirring for 15 min and then carrying out sonic dispersion. The compounding process utilizes 10% to 20% of alcohol amine, 8% to 17% of the industrial salt, 20% to 30% of the industrial waste and 48% to 60% of water; and ultrasonic time in the process is 10 min to 30 min. The active ingredients of the grinding aid obtained in the invention are greatly improved, and the grinding aid is uniform and stable, does not settle, and has good application prospects.

This invention, which involves “the preparation method of 8-hydroxyquinoline metallic compound”, is a synthetic method of organic electroluminescent materials. The preparation method of compound Mqnqm′ is to add solution prepared by Zengshui solvent and industrial ligand into reaction vessel, stir it at a certain temperature, and then achieve high-purity product, as for the Mqnqm′, M stands for Al, Li, n stands for 1-3, m is 0-2, q is 8-hydroxyquinoline and its derivatives, and q′ is ligand different from q. Zengshui solvent is adopted in this invention which can react effectively and thus reducing reaction time and avoiding cumbersome operation and the refining process; this invention also increases total yield and purity, the mother liquor obtained can be recycled, which reduces environment pollution and cost as well. This technology can also spread to the preparation of other 8-hydroxyquinoline metallic compound and the product achieved can be used as electroluminescent materials or electron-transport materials.

The present invention discloses a thymopent aqueous solution preparation, wherein thymopent is adopted as an active component raw material, a pharmaceutical adjuvant and water are added, and mixing is performed to prepare the thymopent aqueous solution preparation, wherein the adjuvant comprises an acetic acid-sodium acetate buffer solution adopted as a pH value adjustment agent, calcium sodium ethylene diaminetetracetate adopted as a protection agent, and sodium chloride adopted as an osmotic pressure adjustment agent, the thymopent amount is 0.1-100 mg / ml, the acetic acid-sodium acetate buffer solution amount is 1.5-1500 mg / ml, the calcium sodium ethylene diaminetetracetate amount is 0.1-40 mg / ml, and the sodium chloride amount is 0.3-300 mg / ml. The thymopent aqueous solution preparation has characteristics of stable low temperature long-time storage, stable room temperature storage, and stability under a strong illumination condition, and does not generate significant change after storing for 5 days at a high temperature of 60 DEG C so as to reduce transportation requirements, provide convenience for drug transportation, substantially reduce a drug cost, and timely provide drug requirements for patients.

The invention provides a preparation method of 2-methyl-4-acetoxy-2-butenal (I) with high yield, and the invention utilizes 2,5-dihydrofuran (II) and synthesis gas as raw materials , prepare 3-formyltetrahydrofuran (III) through hydroformylation reaction under the action of a catalyst, and then react with an acetylating reagent under the action of a catalyst to prepare 2-formyl-4-acetoxy-1-butene (IV) , and then under the action of a catalyst, 2-methyl-4-acetoxy-2-butenal (I) is obtained through double bond isomerization. The method of the invention is cheap and easy to obtain raw materials and low in cost; the technological process is short, the reaction is easy to realize, the operation is safe and convenient, the amount of waste water is small, and the environmental protection; the reaction intermediate product is stable, the reaction activity is suitable, the reaction selectivity is high, the side reaction is few, and High rate, suitable for industrial production.