10 results about "Diethyl benzene" patented technology

The utility model relates to the technical field of petrochemical engineering, in particular to a p-diethylbenzene recovery system which comprises a p-diethylbenzene collecting tank, an air cooler, a p-diethylbenzene tank area, a steam heat exchanger, a carclazyte tower and a circulating pipeline, an outlet header pipe of the p-diethylbenzene collecting tank is connected to a p-diethylbenzene tank area through a first branch pipeline, the air cooler is arranged on the first branch pipeline, and the p-diethylbenzene tank area is sequentially connected with a steam heat exchanger and a carclazyte tower through a tank area outlet pipeline. An outlet of the carclazyte tower is connected to a p-diethylbenzene system through a p-diethylbenzene external supplement pipeline, an outlet sampler is arranged on the p-diethylbenzene external supplement pipeline, and the p-diethylbenzene external supplement pipeline is connected to an inlet of a p-diethylbenzene collecting tank through a circulating pipeline. According to the utility model, the outlet sampler is arranged at the outlet of the carclazyte tower, the treated diethylbenzene is sampled and detected, the diethylbenzene is circularly treated through the circulating pipeline, and after the diethylbenzene is monitored to be qualified, the diethylbenzene is merged into the system, so that the system is prevented from being polluted.

The invention discloses a catalyst composition and application thereof in alkylation reaction of aromatic hydrocarbon and olefin. The catalyst composition comprises a first catalyst and a second catalyst; wherein the first catalyst is an MWW molecular sieve catalyst; the second catalyst comprises a Beta molecular sieve connected with double silicon groups, the static water initial contact angle theta 2 of the second catalyst is 140-165 degrees, and the static water adsorption capacity is 130-170mg / g. The catalyst composition is used for preparing alkyl aromatic hydrocarbon through alkylation of aromatic hydrocarbon and olefin, especially for preparing ethylbenzene through alkylation of benzene and ethylene, has a high ethylene conversion rate and a low diethylbenzene generation amount, and also has good water resistance and alkaline impurity resistance.

The invention is applicable to the technical field of chemistry and chemical engineering, and provides a preparation method and application of a eutectic molecular sieve supported cobalt oxide catalyst, and the method comprises the following steps: taking a silicon source, a titanium source, isopropanol and two organic ammonium salts as raw materials, crystallizing, washing and roasting to prepare the required eutectic molecular sieve catalyst. The prepared catalyst has high activity and target product selectivity in reactions of preparing acetophenone by oxidizing ethylbenzene, preparing methyl acetophenone by oxidizing methyl ethylbenzene, preparing p-ethyl acetophenone by oxidizing p-diethylbenzene and preparing m-ethyl acetophenone by oxidizing m-diethylbenzene. The catalyst has the advantages of easy reuse and regeneration, and can effectively reduce the energy consumption of product separation. The method is simple in preparation process, green, environment-friendly and relatively low in reaction temperature. The prepared catalyst is easy to separate and recover, and has a good application prospect.

Fuel dilution of a lubricant in an engine may be reduced through adjustment methods. Example fuel dilution adjustment methods may include: storing a first fuel distillation dataset for a lubricant composition operating with a first fuel, a second fuel distillation dataset for the lubricant composition operating with a second fuel; calculating a first temperature factor for the first fuel at a reference temperature; calculating an optimized adjustment temperature; and adjusting an operational fuel dilution of the lubricant composition in an internal combustion engine based on the optimized adjustment temperature. Example lubricant compositions may maintain total deposits less than 10 mg from TEOST MHT4 (ASTM D7097) in the presence of a depositor compound, wherein the depositor compound comprises about 0.01 wt % to about 15 wt % diethyl benzene or about 0.01 wt % to about 15 wt % mesitylene.

Fuel dilution of a lubricant in an engine may be reduced through adjustment methods. Example fuel dilution adjustment methods may include: storing a first fuel distillation dataset for a lubricant composition operating with a first fuel, a second fuel distillation dataset for the lubricant composition operating with a second fuel; calculating a first temperature factor for the first fuel at a reference temperature; calculating an optimized adjustment temperature; and adjusting an operational fuel dilution of the lubricant composition in an internal combustion engine based on the optimized adjustment temperature. Example lubricant compositions may maintain total deposits less than 10 mg from TEOST MHT4 (ASTM D7097) in the presence of a depositor compound, wherein the depositor compound comprises about 0.01 wt % to about 15 wt % diethyl benzene or about 0.01 wt % to about 15 wt % mesitylene.

This invention relates to a method for producing divinylbenzene by dehydrogenation of diethylbenzene. The method includes: contacting a diethylbenzene-containing feedstock with a dehydrogenation catalyst in the presence of water vapor to carry out a dehydrogenation reaction, thereby obtaining a product containing divinylbenzene; the dehydrogenation catalyst includes Fe2O3, K2O, CeO2, MoO3, and CaO; wherein the exposed crystal surface area of ​​CeO2 (100) accounts for more than 65% of the total exposed crystal surface area of ​​CeO2. The catalyst of this method exhibits high catalytic activity and divinylbenzene selectivity in the production of divinylbenzene under low water ratio conditions.

The application discloses a semi-supervised soft measurement method for the concentration of diethylbenzene in ethylbenzene rectification, comprising the following steps: obtaining the ethylbenzene distillation process variables in the ethylbenzene column with labels and without labels, calculating the mixed mutual information for feature selection to obtain auxiliary variables of soft measurement; performing data padding and time series decomposition on each auxiliary variable to obtain fluctuation items and trend items of the auxiliary variables; constructing a double-channel prediction network, including a fluctuation item prediction channel and a trend item prediction channel, and finally performing regression prediction on the two channels through a full connection layer, and superimposing the outputs of the two channels to obtain the predicted value of the diethylbenzene concentration; performing network training, and constructing a semi-supervised loss function for the samples with labels and without labels respectively; inputting the auxiliary variables after time series decomposition into the trained network to obtain the soft measurement result of the diethylbenzene concentration. According to the application, the accurate soft measurement of the diethylbenzene concentration in the ethylbenzene rectification process can be realized.

The present invention relates to a method for synthesizing mixed diethylbenzene by alkylation of ethylbenzene with ethanol or ethylene in the field of chemical synthesis technology. In a reaction device, the catalyst Mn@ZSM-5 is loaded in a fixed reaction bed, the reaction raw materials are ethylbenzene and ethanol or ethylene, the reaction temperature is 280-320 °C, the reaction pressure is 0.5 Mpa-1.5 MPa, the molar ratio of ethylbenzene to ethanol or ethylene is 10-14:1, and the weight hourly space velocity is 0.5 h-1. In the present invention, the Mn@ZSM-5 catalyst adjusts the surface acid distribution and pore channels of the ZSM-5 molecular sieve through Mn elements to obtain a catalyst for mixed diethylbenzene with high yield and high selectivity. Finally, the yield of mixed diethylbenzene is ≥28 wt%, and the selectivity of mixed diethylbenzene is ≥98 wt%. At the same time, its reaction temperature is lower than that of the prior art, and the present invention is applicable to the production of mixed diethylbenzene.

An example is directed to a pseudo narcotic propionic acid (PA) formulation including a propionic acid; a synthetic silicon dioxide; and a microcrystalline cellulose (MCC). The pseudo narcotic PA may further include at least one of: phenethyl chloride (PEC), phenethyl bromide (PEB), acetic acid, or N,N-diethyl aniline.

The utility model discloses an energy-saving styrene production device which comprises a device body, the device body comprises an alkylation unit, a rectification unit, an ethylbenzene dehydrogenation unit and a tank area unit, the rectification unit is arranged on the front side of the alkylation unit, the ethylbenzene dehydrogenation unit is arranged on one side of the alkylation unit, and the tank area unit is arranged on the other side of the alkylation unit. A storage tank I and a storage tank II are respectively arranged in the tank field unit, the alkylation unit comprises two alkylation reactors, a pre-fractionating tower and a non-aromatic removal tower, and a gas inlet pipe is arranged on the outer wall of the alkylation reactor on the left side; a diethylbenzene pipe is arranged below the gas inlet pipe, one end of the diethylbenzene pipe is arranged at the bottom of the alkylation reactor on the right side, a first connecting pipe is arranged at the upper end of the alkylation reactor, one end of the first connecting pipe is connected to a pre-fractionating tower, and a non-aromatic removal tower is arranged on one side of the pre-fractionating tower; the stability of styrene production and the high efficiency of styrene dehydrogenation can be improved, and the method has practicability.