37 results about "Prenol" patented technology

A method for analyzing a sample that contains a plurality of lipid isomers is described that involves forming one or more lipid metal ion adducts and transporting the one or more lipid metal ion adducts through a differential mobility spectrometer to cause separation of the one or more lipid metal ion adducts from each other. The lipid isomers can be chosen, for example, from fatty acids, glycerolipids, glycerophospholipids, sphingolipids, saccharolipids, polyketides, sterol lipids, and prenol lipids. Particular examples include phosphatidylcholine regioisomers such as 1-palmatoyl-2-oleoyl-sn-phosphatidylcholine (POPC) and 1-oleoyl-2-palmatoyl-sn-phosphatidylcholine and triacylglycerols containing palmetic and oleic acid groups. The metal chosen can include a cationization reagent that contains sodium, potassium, silver or lithium.

The invention provides a ceramic dispersing agent and a preparation method thereof. The preparation method comprises the following steps that 1, allylthiourea, cardanol sodium sulfonate, an acidity regulating agent and water are added into a reaction kettle, stirring is started, and heating is started to increase the temperature; 2, when the temperature is increased to 100 DEG C-120 DEG C, glyoxal starts to be dropwise added, and the dropwise adding time is 1-5 h; 3, cardanol epoxy propyl ether and prenol polyoxyethylene ether are added into the reaction kettle, and after the materials are stirred to be uniform, an initiator solution with the mass percent concentration of 1%-10% starts to be dropwise added, wherein the initiator solution is prepared from an initiator and part of water, the dropwise adding time is controlled to be 0.5-3 h, and the dropwise adding temperature is controlled to be 95 DEG C-120 DEG C; 4, after dropwise adding is completed, reacting continues to be conducted for 1-4 h by keeping the temperature, an alkalinity regulating agent is added for neutralization, after neutralization is completed, retaining water is added, cooling and discharging are conducted, and then the ceramic dispersing agent is obtained.

The invention discloses a water reducing agent with high cement compatibility, which comprises component A and component B, and the raw materials of component A are: isopentenol polyoxyethylene ether, reducing agent, acrylic acid, hydroxyethyl methacrylate, Chain transfer agent, polyethylene glycol diacrylate, oxidizing agent and water; the preparation method of component B is: (1) ball mill the mixed powder of calcium aluminum silicate and calcium sulfate, and sieve; (2) configure sodium borate, phosphoric acid Sodium aqueous solution, heat the sieved powder to 1200-1250°C, keep it warm for 1-2h, then immerse it in the solution and water-cool it to room temperature, take it out after cooling, repeat the heating and keeping warm, soaking process twice; finally solid-phase washing, drying, Obtain solid phase A; (3) configure the aqueous solution of maleic acid and N,N-dimethylformamide in the container, soak solid phase A wherein, heat, keep warm, air-cool, filter, wash, dry, obtain Component B. The invention improves the compatibility between the concrete and the water reducing agent, reduces the hydration speed, improves the fluidity, and has very good use effect.

The invention discloses a method of recovering formaldehyde from a supercritical method prenyl alcohol synthesis system. According to the method, formaldehyde-containing 3-alcohol crude product which is obtained by supercritical reactions is subjected to continuous rectification under a normal pressure; formaldehyde and a little of 3-alcohol are directly produced from the tower top; formaldehyde is enriched continuously and carries out self-polymerization to form polymer (solid) adhered on the internal wall of a condenser; then the formaldehyde polymer is separated by a scraper and a cold filtering method; and 3-alcohol obtained by tower top filtering and 3-alcohol in the tower bottom are dehydrated, weight-reduced, and rectified to carry out purification. By adopting the method, the formaldehyde content of 3-alcohol crude product can be reduced to less than 0.01%, the product becomes qualified, at the same time, the recovered formaldehyde polymer can be used as a raw material, and the waste is converted into valuable resource. The technology can remove formaldehyde without adding any alkaline chemical reagent, the cost is saved, and the discharged wastewater is greatly reduced. The method is green and environmentally-friendly, has a lower cost, and can be widely used in industry.

The invention provides a production process of industrialized prenyl alcohol, comprising the following steps: A) depolymerizing paraformaldehyde to generate free formaldehyde; B) contacting the free formaldehyde with alkaline isobutylene, and carrying out Prince react to obtain isopentenol; the basic isobutene includes isobutene and an alkaline medium, and the pH value of the basic isobutene is 7.4 to 7.8. The raw material of the present invention is basic isobutene, and the alkali in basic isobutene can neutralize the formic acid generated by the disproportionation of formaldehyde in the addition reaction, and effectively prevent the side reaction of isobutene dimerization to generate dimethylhexene and trimethylcyclopentane ; Thereby improving the chromaticity of prenyl alcohol product, obtains colorless and transparent prenyl alcohol.

The invention relates to a catalyst for preparing isopentenol through transesterification of isopentenyl acetate and a reaction process thereof. The method uses isopentenyl acetate and normal alcohol as reaction raw materials, and under the action of a solid acid as a catalyst, isopentenyl alcohol and certain acetate are transesterified. The normal alcohols include methanol, ethanol, propanol and butanol, and the corresponding certain acetates are methyl acetate, ethyl acetate, propyl acetate and butyl acetate. Described this solid acid catalyst adopts IrFe / CeO 2 / SiO 2 as a catalyst system. It is particularly pointed out that an important reaction process step to obtain a high-yield target product (≥90%) is to first feed H in the reaction process. 2 for a period of time, and then switch to N 2 . The invention has the obvious advantages of low economic and environmental costs, easy separation of products, simple post-treatment, etc., and has good application prospects.

The invention discloses a method for synthesizing prenol by composite catalyst. Generally, rare metals high in price and small in number of application times are used in the existing synthetic methods, and accordingly product cost is increased in industrial production, and product competitiveness is lowered. The method for synthesizing prenol by composite catalyst is characterized by using 3-methl-3-butene-1-ol as raw material, using composite catalyst composed of raney nickel and solid super acid, hydrogenating, and subjecting the 3-methl-3-butene-1-ol double-bond isomerization to synthesize prenol. The composite catalyst is easy to obtain, low in cost, large in number of application times, high in conversion rate and selectivity, low in reaction temperature and the like. Reaction temperature is low, and the method is low in energy consumption and meets the technological requirements on energy conservation and consumption reduction.