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Production method of paraffin

A production method and paraffin technology, applied in organic chemical methods, chemical instruments and methods, hydrogenation hydrocarbon production, etc., can solve problems such as incapable of stable and efficient production, uneven generation of impurities, etc.

Active Publication Date: 2022-07-15
SUMITOMO SEIKA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 of paraffin
  • Production method of paraffin
  • Production method of paraffin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Propane was produced by the hydrogenation reaction of propylene using the paraffin production apparatus 1 of the above-described embodiment.

[0043] The reaction tower 10 was made of stainless steel and had an inner diameter of 31 mm. The filling height of the granular member in the reaction tower 10 was set to 50 cm. All the granular parts packed in the reaction tower 10 were used as a catalyst-carrying carrier. That is, the ratio of the sum of the volume of the entire carrier on which the catalyst is supported and the volume of all the granular members not carrying the catalyst relative to the volume of the entire carrier on which the catalyst is supported is 1 time. As the carrier supporting the catalyst, a product of NE Kaijia Co., Ltd. with an average particle diameter of 3 mm was used. Each carrier of this example was made of alpha alumina, and supported palladium (Pd) as a catalyst. The ratio of the weight of the catalyst carried on each carrier to the sum of...

Embodiment 2

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

[0072] By the hydrogenation reaction of ethylene in the reaction tower 10 under the above conditions, the maximum exothermic temperature was 250°C at a position 6 cm away from the inlet 10a 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, residual ethylene was less than 0.1 vol ppm and methane was 0.3 vol. ppm, propane is less than 0.1 volume ppm.

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Abstract

The present invention provides a method for stably and efficiently producing high-purity paraffins from easily obtainable high-purity olefins under the conditions that side reactions are suppressed and the amount of impurity production does not vary. The reaction tower (10) is filled with a plurality of granular parts that do not have catalytic activity, and at least a part of the granular parts is used as a carrier supporting the catalyst, and the catalyst is passed through the reaction tower (10) in the presence of the catalyst. The reaction of olefins and hydrogen in the gas phase to produce paraffins. The ratio of the weight of the catalyst carried on each of the carriers to the sum of the weight of each of the carriers and the weight of the catalyst carried on each of the carriers is 0.001% or more and 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, the demand for high-purity paraffins such as high-purity ethane and high-purity propane has gradually increased. For example, high-purity propane, which is a raw material for high-pressure silicon carbide (SiC) semiconductors, is required to contain impurities at a concentration of less than 1.0 vol ppm in order to achieve high pressure resistance of silicon carbide. [0003] As a method for producing high-purity paraffins, a method of distilling and purifying low-purity paraffins is known. However, in this method, the scale and investment of a distillation facility for separating impurities is large. Furthermore, since the scale of the equipment is large, a very large amount of energy is required for operation. In particular, when low-purity propane containing propyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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