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Production method for paraffin

A production method and paraffin technology, applied in the direction of organic chemical methods, chemical instruments and methods, hydrogenation hydrocarbon production, etc., can solve the problems of uneven generation of impurities and inability to manufacture stably and efficiently, and achieve the effect of suppressing side reactions

Active Publication Date: 2019-06-04
SUMITOMO SEIKA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a problem that the amount of impurities generated is not uniform, and high-purity paraffins cannot be produced stably and efficiently.

Method used

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  • Production method for paraffin
  • Production method for paraffin
  • Production method for paraffin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Using the paraffin production apparatus 1 of the above-mentioned embodiment, propane was produced by hydrogenation reaction of propylene.

[0043] The reaction tower 10 is made of stainless steel and has an inner diameter of 31 mm. The filling height of the granular components in the reaction tower 10 was set to 50 cm. All of the granular materials filled in the reaction tower 10 are used as carriers for supporting the catalyst. That is, the ratio of the sum of the volume of the entire carrier carrying the catalyst and the volume of all the granular materials not carrying the catalyst to the volume of the entire carrier carrying the catalyst is 1 time. As the carrier on which the catalyst was loaded, a product of NE Kaika Co., Ltd. (Ene·Ikem Kit Co., Ltd.) having an average particle diameter of 3 mm was used. Each carrier of this example is made of α-alumina, and supports palladium (Pd) as a catalyst. The ratio of the weight of the catalyst supported on each carrier ...

Embodiment 2

[0071] Ethane was produced by hydrogenation of ethylene under the same conditions as in Example 1 except that ethylene with a purity exceeding 99.99% by volume was supplied from the olefin gas cylinder 2 .

[0072] The hydrogenation reaction to ethylene in the reaction tower 10 under the above conditions showed a maximum exothermic temperature of 250° C. at a position 6 cm away from the inlet 10 a in the reaction tower 10 .

[0073] The impurities contained in the ethane gas discharged from the outlet 10b of the reaction tower 10 were analyzed by a gas chromatograph 17 manufactured by Shimadzu Corporation. Among the impurities other than hydrogen, remaining ethylene was less than 0.1 volume ppm and methane was 0.3 volume. ppm, propane less than 0.1 volume ppm.

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Abstract

The invention provides a method capable of stably and efficiently producing a high-purity paraffin from a high-purity olefin which is easily available, while inhibiting side reactions and eliminatingvariation in the amount of produced impurities. This method comprises loading a plurality of granular materials not having catalyst activity into a reaction tower 10, at least a portion of the granular materials being used as carriers supporting a catalyst, and reacting hydrogen and an olefin in a gas phase state in the presence of the catalyst in the reactor tower 10, to produce a paraffin. The proportion of the weight of the catalyst supported by the carriers with respect to the sum of the weight of the carriers and the weight of the catalyst supported by the carriers is not less than 0.001%but less than 0.01%.

Description

technical field [0001] The present invention relates to a process for producing high-purity paraffins by hydrogenation of olefins in the presence of a catalyst. Background technique [0002] In recent years, there has been an increasing demand for high-purity paraffins such as high-purity ethane and high-purity propane. For example, in high-purity propane, which is a raw material of high withstand voltage silicon carbide (SiC) semiconductor, in order to realize the high withstand voltage of silicon carbide, the concentration of each contained impurity is required to be less than 1.0 volume ppm. [0003] A method of distilling and purifying low-purity paraffins is known as a method for producing high-purity paraffins. However, in this method, the scale of the distillation facility for separating impurities is large, and the investment amount is also large. Furthermore, since the scale of the equipment is large, a very large amount of energy is required for operation. Espec...

Claims

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Application Information

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IPC IPC(8): C07C5/03C07C9/06C07C9/08B01J23/44C07B61/00
CPCB01J23/44C07B61/00C07C5/03C07C9/06C07C9/08
Inventor 津野修司桑名晃裕酒井良一郎
Owner SUMITOMO SEIKA CHEM CO LTD
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