138 results about "Phenylmethanol" patented technology

The invention discloses a technique for using methylbenzene to prepare benzaldehyde and benzene methanol by air oxidation and equipment. In a reaction separating system consisting of a multistage oxidation reactor as well as a gas-liquid separator, a lateral line fractionating column or a fractionating column system, 0.1 to 50ppm of monometallic porphyrin or u-oxygen bimetallic porphyrin is separately used as a catalyst, or metallic porphyrin and phthalimide (or salt) are used as a mixed catalyst according to the weight ratio of 1:20 to 100; when the reaction temperature is 80 to 200 DEG C, the methylbenzene is maintained in a multistage oxidizer for 60 to 180 minutes and prepared into the benzaldehyde and benzene methanol by catalytic oxidation; and the gas-liquid separation and purification are carried out. Compared with the prior art, the technique and equipment can obviously improve the conversion rate of the methylbenzene, and the conversion rate of the methylbenzene can reach to be more than 95% by experiments; in addition, the technique and equipment also can improve the selection of the benzaldehyde and benzene methanol, and the selection of the benzaldehyde and benzene methanol can reach to be more than 50%.

The invention discloses an energy conservation and emission reduction process for producing p-xylene through alkylation of tolylcarbinol, and belongs to the field of petrochemical industry. The process is divided into a reaction part and a separation part. A plurality of ZSM-5 catalyst fixed bed reactors are adopted in the flow; the temperature rise of the reactors is controlled by direct chilling of methanol among the reactor sections, so that the conversion rate of toluene is increased; the temperature after heat exchange between materials at outlets of the reactors and raw materials in front of a heating furnace is increased through compression of a compressor; then heat exchange is performed many times to increase the heat recovery; and meanwhile, power is provided for flowing of the materials in the flow, and the amount of a low-grade refrigerant required for flash separation is reduced, so that heat work integration is realized; and finally, a p-xylene product is obtained through coupling operation of rectification and melt crystallization. Carrier gas required by the process and unreacted toluene are mostly recycled in the flow. The energy conservation and emission reduction process has the effects and benefits of being a new energy conservation and emission reduction process for producing the p-xylene and producing obvious economic and social benefits.

The invention provides a method for preparing benzaldehyde through phenylcarbinol oxidation. According to the method, ionic liquid serves as a supporting electrolyte, acetonitrile serves as a cosolvent, a high-pressure reactor provided with electrodes is used for performing electrochemical electrolysis in a supercritical CO2 environment with a reaction temperature of 25-70 DEG C (system pressure is 10-25MPa), and the phenylcarbinol is converted to the benzaldehyde through selective oxidation. According to the method, features of the supercritical CO2 such as small viscosity, zero surface tension and friendly environment are utilized, advantages of the ionic liquid such as stable physicochemical properties and high electrical conductivity are combined, a constant potential electrolysis technology is adopted to control the efficient selective oxidation of the phenylcarbinol to the benzaldehyde effectively, and the yield and the selectivity of the benzaldehyde can reach above 99.8% under an optimum condition.

The invention discloses a fast curing thermosetting conductive silver adhesive. The silver adhesive comprises a base resin, a curing agent, a curing accelerator and a conductive material. The silver adhesive is characterized in that: the base resin is epoxy resin, the curing agent is an aromatic polyamine curing agent, the curing accelerator is a phenylcarbinol-modified imidazole compound, and the conductive material is silver powder. The thermosetting conductive silver adhesive can effectively reduce the curing time.

The invention relates to a method for separating and measuring levocetirizine dihydrochloride and 5 related substances by using high performance liquid chromatography. According to the method, a chromatographic column is a C18 chromatographic column, detection is performed after the elution of a mobile phase containing a mixed solution of sodium heptanesulfonate and acetonitrile, and alkali is added to the mobile phase. By adopting the method, separation and detection can be simultaneously performed any one or more of 5 related substances in a levocetirizine dihydrochloride tablet, that is, levocetirizine dihydrochloride, levocetirizine lactose ester thereof, levocetirizine polyethylene glycol ester, p-chlorobenzophenone, p-chlorobenzyl alcohol and p-chlorodiphenylmethylpiperazine. Compared with the prior art, the degree of separation of the levoctirizine hydrochloride and the related substances is good, the sensitivity is high and the separation and detection efficiency is improved.

Improved mechanical processing lubricating oil comprises the following raw materials by weight: 6-9 parts of sodium sulfite, 4-7 parts of ricinoleic acid polyester, 3-5 parts of hydroxyl sodium sulfonate, 4-8 parts of polyethylene glycol monomethyl ether, 2-4 parts of ethanolamine, 7-9 parts of nitromethane, 3-6 parts of triethanolamine, 4-9 parts of Turkey red oil, 6-8 parts of low molecular polyethylene wax, 2-6 parts of benzene methanol, 3-8 parts of paraffin, 4-10 parts of tetramethylammonium hydroxide, 2-5 parts of methyl polytetrafluoroethylene, 1-4 parts of sodium hydroxide, 2-6 parts of epoxy ethane and 15-24 parts of base oil. The beneficial effects are that the mechanical processing lubricating oil can be used to well play the lubricating and cooling effect, reduces the friction, and has good high temperature tolerance.

The invention discloses a penetrating addition agent which comprises the following compositions in weight portion: 0.00018 to 0.0006 portion of laurocapam, 0.5 to 25 portions of myristyl lycine, 0.1 to 12 portions of dipropylene glycol methyl ether, 0.01 to 5 portions of N- methyl pyrrolidone, 0.05 to 2.5 portions of tri n butyl phosphate, 5 to 60 portions of diethylene glycol or butyl ether, 1 to 20 portions of phenylcarbinol and 1 to 3 portions of lignin sulfonic acid ammonium salt. The invention also discloses an application of the penetrating addition agent to the dyeing process and to the retting hemp process. The penetrating addition agent in the dyeing process ensures that the color yield and homochromatic properties of the double-component fiber are good, the leveling property is good and the 'white core' phenomenon is avoided.