33 results about "N-propylbenzene" patented technology

A catalyst for the alkylation reaction of aromatic hydrocarbon and light alkane contains Mo element and ZSM-5 molecular sieve, wherein the weight ratio of the Mo element and the ZSM-5 molecular sieve is 1-16%. A binder of 5-40 wt% is added into the catalyst. In accordance with the embodiment of the catalyst in the alkylation reaction of aromatic hydrocarbon and light alkane, the reaction temperature is 250-450 DEG C, the material molar ratio of the aromatic hydrocarbon and light alkane is 0.5-3, the weight space-velocity is 0.2-5 h<-1>, accordingly, toluene, ethyl benzene, isopropyl benzene and n-propylbenzene can be prepared with high selectivity.

The invention relates to a method for producing isopropylbenzene by using benzene and propylene and mainly solves the problem of high content of n-propylbenzene existing in an isopropylbenzene product of the prior art. The method better solves the problem and can be applied to the industrial production of isopropylbenzene by adopting the technical scheme which comprises the following steps of: (1) a first stream of benzene material flow 12 and propylene enter an alkylation reactor to react, thereby a material flow 19 comprising the benzene, propylene, isopropylbenzene and polyisopropylbenzene is obtained; (b) the material flow 19 is separated to obtain material flow 23 containing polyisopropylbenzene; (c) after the material flow 23 is separated by a rectifying tower, material flow 13 is obtained at the tower top, and material flow 14 is obtained in the middle part of the tower; (d) a second stream of material flow 10 and the material flow 13 enter a first a first alkyl group transfer reaction zone for carrying out alkyl group transfer reaction to obtain material flow 21; and a third stream of material flow 11 and the material flow 14 enter a second alkyl group transfer reaction zone for carrying out alkyl group transfer reaction to obtain material flow 22; and (e) the material flow 21 and the material flow 22 enter the follow-up refining process, thereby the isopropylbenzene product is obtained.

An anise flavored liquid medication. The liquid medication contains phenylephrine and an anethole analog that is substantially free of aldehyde groups. In one example, the anethole analog can be 1-methoxy-4-n-propylbenzene.

A process for the disproportionation of cumene is disclosed which comprises the step of contacting a feed containing cumene, under disproportionation conditions, with a catalyst comprising a molecular sieve, preferably TEA-mordenite. The contacting step disproportionates at least part of the cumene in the feed to provide a disproportionation effluent containing benzene and a mixture of diisopropylbenzene isomers. The effluent is then recovered and contains, prior to any separation step, less 1% of ortho-diisopropylbenzene by weight of the total diisopropylbenzene content of said effluent, less than 1 wt % of n-propylbenzene, less than 5 wt % of triisopropylbenzenes and less than 5 wt % of disproportionation products other than benzene and diisopropylbenzenes.

The invention relates to a method for separation of m/4-ethyltoluene from an aromatic hydrocarbon mixture, and mainly solves the technical problem of difficult separation of m/4-ethyltoluene from an aromatic hydrocarbon mixture. According to a technical scheme, the aromatic hydrocarbon mixture is introduced into a coarse separation tower, C8 and C8 pre-components are removed from the coarse separation tower top, the coarse separation tower bottom liquid is introduced into a first fine separation tower equipped with double liquid accumulation tanks at the top, a light component containing m/4-ethyltoluene is led out from the first fine separation tower top into a second fine separation tower equipped with double liquid accumulation tanks, a n-propylbenzene and cumene mixture is led out from the second fine separation tower top, and the m/4-ethyltoluene product is led out from the second fine separation tower bottom. The method provided by the invention well solves the technical problem, and can be applied to the aromatic hydrocarbon mixture separation field. With double tower top liquid accumulation tanks, batch rectification can be operated under the total reflux condition, thereby reducing the number of theoretical plates of the tower, and the alternating operation of the double liquid accumulation tanks can realize pressure reduced batch rectification.

A process of producing isopropyl benzene which solves the problem of high amount of n-propyl benzene according to the prior art. The process separates the polyisopropyl benzene through a suitable rectification into two streams of relatively lighter and heavier components, wherein the content of diisopropylbenzene in the stream of relatively lighter components is controlled to be at least greater than 95 wt %, and the content of tri-isopropyl benzene in the stream of relatively heavier components is controlled to be at least greater than 0.5 wt %. Such a technical solution subjecting the two streams respectively to the transalkylation solves the problem raised from the prior art, and is useful for the industrial production of isopropyl benzene.

The invention relates to a method for producing n-propylbenzene by using benzene and isopropylbenzene. The method comprises the step of contacting benzene and isopropylbenzene with a catalyst under the effective reaction condition to obtain the n-propylbenzene, and is characterized in that the effective reaction condition comprises that the temperature is at least more than 200 DEG C. The method can be applied to industrial production of the n-propylbenzene.

The invention discloses a preparation method of a CF2O-containing compound, and an intermediate compound and a preparation method thereof. The preparation method of a CF2O-containing compound, provided by the invention, comprises the following step: in solvent, in the presence of a catalyst, performing coupling reaction on 5-(bromo-difluoro-methoxy)-1,2,3-trifluorobenzene shown as Formula 1 and a Grignard reagent 3,5-difluoro-4'-propylbiphenyl-4-magnesium bromide shown as Formula 2, thus obtaining 4-(4-n-propyl)phenyl-3,5-difluoro-1',1'-difluorobenzyl-3,4,5-trifluorophenyl ether shown as Formula 3. The preparation method provided by the invention is simple to operate, mild in reaction conditions, convenient in posttreatment steps, high in reaction conversion rate, high in atom economy, friendly to environment, favorable in product purity and suitable for industrial production.

The invention relates to a method for producing isopropylbenzene and mainly solves the problem of high content of n-propylbenzene existing in the prior art. The method better solves the problem and can be applied to the industrial production of isopropylbenzene by adopting the technical scheme which comprises the following steps of: (1) a material flow 12 containing polysubstituted isopropylbenzene enters a polysubstituted isopropylbenzene tower, after rectifying seperation is carried out on the material flow 12, a material flow 8 is obtained at the tower top, a material flow 9 is obtained in the middle part of the tower, and a heavy component material flow 11 containing oil tar is obtained in the tower bottom and enters a follow-up process; (b) a raw material benzene material flow 6 and the material flow 8 enter a first alkyl group transfer reaction zone from the top to contact with a catalytic agent for carrying out alkyl group transfer reaction, and a material flow 7 containing isopropylbenzene is obtained after reaction; (c) the material flow 7 and the material flow 9 enter a second alkyl group transfer reaction zone from the top to contact with the catalytic agent for carrying out alkyl group transfer reaction, and a material flow 10 containing isopropylbenzene is obtained after reaction; and the material flow 10 enters the follow-up refining process, thereby the isopropylbenzene product is obtained.

The invention relates to a method for producing n-propylbenzene by using benzene and diisopropylbenzene. The method comprises the step of contacting benzene and diisopropylbenzene with a catalyst under the effective reaction condition to obtain the n-propylbenzene, and is characterized in that the effective reaction condition comprises that the temperature is at least more than 200 DEG C. The method can be applied to industrial production of the n-propylbenzene.