33 results about "N-propylbenzene" patented technology

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 application of a catalyst in the alkylation reaction of aromatic hydrocarbon and light alkane. The catalyst 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%. The catalyst contains 5-40 wt% of binder. The reaction temperature in the alkylation reaction of the aromatic hydrocarbon and the light alkane is 250-450 DEG C; the mole ratio of the feeding aromatic hydrocarbon and the light alkane is 0.5-3, and the weight air speed is 0.2-5 / h. When the catalyst is applied to the alkylation reaction of benzene and propane, toluene, ethyl benzene, isopropyl benzene and n-propylbenzene can be prepared with high selectivity.

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.

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.

The invention relates to a method for preparing propiophenone by biomimetic catalytic oxidation of n-propylbenzene with oxygen, comprising the following steps: taking n-propylbenzene as the raw material, selecting any one of 1-30ppm of mononuclear metalloporphyrin and mu-oxo-dinuclear metalloporphyrin or the composition of the two substances as the catalyst under normal pressure and in the absence of solvents, introducing oxygen at the flow rate of 10-60mL / min, initiating reaction at 140-160 DEG C and then carrying out reaction at 70-110 DEG C for 4-10h, thus obtaining the propiophenone. In the method, the way of high temperature quick initiation and low temperature reaction is adopted, thus minimizing the reaction initiation time, greatly shortening the reaction time, improving the reaction efficiency, reducing the energy consumption, lowering the operation cost and improving the reaction safety.

The invention discloses a diesel oil additive and a preparation method thereof. The diesel oil additive includes a multifunctional agent and aviation kerosene with a mass ratio of 1:1-5, in parts by mass, wherein the multifunctional agent includes the following components : 60-100 parts of 2-ethylhexyl nitrate, 1-20 parts of light solvent naphtha, 1-20 parts of heavy solvent naphtha, 0.1-10 parts of 1,2,4-trimethylbenzene, 1, 0.1-10 parts of 3,5-trimethylbenzene, 0.05-8 parts of naphthalene, 0.05-8 parts of n-propylbenzene, and 0.05-5 parts of cumene. The diesel additive of the present invention can clean the carbon deposits in the fuel injector, make the combustion more complete, improve the fuel utilization efficiency, increase the power, restore the good atomization effect of the fuel, improve the difficult condition of cold start, and can effectively improve the stability of diesel oil. Fully compatible.

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 material flow 19 comprising 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 alkyl group transfer reaction zone for carrying out alkyl group transfer reaction to obtain a material flow 20; the material flow 20, 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 the material flow 21 enters the follow-up refining process, thereby the isopropylbenzene product is obtained.

The invention relates to a method for producing isopropylbenzene. The problem that the content of n-propylbenzene is high in the prior art is solved. The method comprises the following steps that: a) a material flow which contains multi-substituted isopropylbenzene enters a multi-substituted isopropylbenzene tower, after distillation separation, a material flow 13 is obtained from the top of the tower, a material flow 12 is obtained from the middle part of the tower, and a heavy component material flow which contains tar is obtained from a tower kettle, wherein in the material flow 13, the content of diisopropylbenzene is at least more than 95 weight percent, and in the material flow 12, the content of triisopropylbenzene is at least more than 0.5 percent; b) a first benzene material flow and the material flow 13 enter a first alkyl transfer reactor from the top to be contacted with a catalyst to perform an alkyl transference reaction, and a material flow 9 which contains the isopropylbenzene is obtained at the bottom; c) a second benzene material flow and the material flow 12 enter a second alkyl transference reactor from the top to be contacted with a catalyst to perform an alkyl transference reaction, and a material flow 10 which contains the isopropylbenzene is obtained at the bottom; and d) the material flow 9 and the material flow 10 enter a subsequent refining process to produce the product, namely the isopropylbenzene. The problem is better solved through the technical scheme and the method can be applied to the industrial production of the isopropylbenzene.

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.