The method of obtaining containing isobutane and isohexane product


C07C6/10 - in hydrocarbons containing no six-membered aromatic rings

 

(57) Abstract:

The object of the invention is a method for containing isobutane and isohexane product by contacting isoparaffin hydrocarbon feedstock with an acidic catalyst, and as the acidic catalyst used acid catalyst having an acidity of H0> 8, and as isoparaffin hydrocarbon - isopentane raw materials, the process is carried out in the presence of at least one olefinic hydrocarbon and/or at least one branched higher paraffin hydrocarbon at a temperature of 0 to 150oC. is Achieved simplification of the technology while maintaining a high yield of the target butane and isohexane. 5 C.p. f-crystals, 1 table.

The invention relates to the production of lower isoparaffin hydrocarbons, more specifically to a method for containing isobutane and isohexane product.

A method of obtaining containing isobutane and isohexane product by contacting a paraffin hydrocarbon, preferably isobutane feedstock with a solid acidic catalyst containing a platinum group metal on a crystalline aluminosilicate, in the atmosphere in which the Disadvantage of this method is the complexity of the technology due process in an atmosphere of hydrogen at relatively high temperatures and under pressure.

Object of the invention is the provision of a method of obtaining containing isobutane and isohexane product by catalytic disproportionation isopentanol raw materials, which can be done using simpler technology.

The problem is solved by the proposed method of obtaining containing isobutane and isohexane product by contacting isoparaffin hydrocarbon feedstock with an acidic catalyst, due to the fact that, as the acidic catalyst used acid catalyst having an acidity of Ho> 8, and as isoparaffin hydrocarbon - isopentane raw materials, the process is carried out in the presence of at least one olefinic hydrocarbon and/or at least one branched higher paraffin hydrocarbon at a temperature of 0 to 150oC.

The high yield of the target butane and isohexane achieved in the implementation process in the presence of acids having an acidity of sulfuric acid, or a higher acidity. The acid can be used Pentecostal or louisbuy acid.

Preferred acids are selected from the group of fluorinated sulfonic acids, p is th way higher branched paraffins can be a byproduct for example, the production of products of alkylation, suitable as gasoline fractions. These waxes typically have 10 to 30 carbon atoms. In the contact with the acid they craterous to olefinic hydrocarbons.

It is assumed that olefinic hydrocarbons promote the disproportionation of isopentane due to protonation of olefins to ions Carbonia, which react with isopentane with the formation of ion isochrone C10which is then converted to isobutane and isohexanol. The degree of disproportionation of isopentane is proportional to the amount of olefin in the process. However, high concentrations of olefins lead to the formation of paraffin hydrocarbon by-products with high molecular weight.

Therefore, olefinic hydrocarbons and/or higher branched paraffin hydrocarbons used in the proposed method in an amount of from 0.1 to 50 % of the volume supplied to the process isopentanol raw materials.

The following examples illustrate the proposed method.

Examples. The process is carried out in a tubular reactor with a length of 6 mm and an inner diameter of 0,635 cm, filled with silicon dioxide brand Merck me. In the reactor serves 6 ml triftoratsetata, and then through the reactor with the specified attachment missing raw materials indicated in the table structure with a speed of 5 ml/min, and the process is carried out at a temperature 0 - 40oC. Other parameters of the process and its results are summarized in the table.

1. The method of obtaining containing isobutane and isohexane product by contacting isoparaffin hydrocarbon feedstock with an acidic catalyst, characterized in that as the acidic catalyst used acid catalyst having an acidity of H0> 8, and as isoparaffin hydrocarbon - isopentane raw materials, the process is carried out in the presence of at least one olefinic hydrocarbon and/or at least one branched higher paraffin hydrocarbon at a temperature of 0 to 150oC.

2. The method according to p. 1, characterized in that the use of olefinic hydrocarbons with 3 to 6 carbon atoms.

3. The method according to p. 1, characterized in that the use of branched paraffin hydrocarbons with 10 to 30 carbon atoms.

4. The method according to p. 1, characterized in that the olefinic and/or higher branched paraffin hydrocarbons use the form an acid catalyst, including fluorinated acid.

6. The method according to p. 5, characterized in that the fluorinated sulfonic use triftormetilfullerenov.

 

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