Process for hydrogenation of phthalate based compound
AssigneeHanwha Solutions Corporation
InventorsKitaeg Jung, Hyo Suk Kim, Seongmin Park
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Abstract
This invention relates to a process for hydrogenation of a phthalate based compound. According to the invention, generation of by-products is inhibited during hydrogenation, and thus, catalytic activity is improved and life is prolonged, thereby increasing efficiency and economical feasibility of the industrial process. And, since the hydrogenation product prepared according to the invention has high purity and low acid value, it has excellent qualities as a plasticizer, and thus, can be used for various products.
Claims11
A process for hydrogenation of a phthalate based compound comprising steps of introducing gas-phase raw material comprising hydrogen;
- and liquid-phase raw material comprising a phthalate based compound and having a HAZE value of 6% or less into a reactor, and conducting hydrogenation of the hydrogen and phthalate based compound in the presence of a hydrogenation catalyst,
- wherein the process for hydrogenation further comprises a step of filtering at a temperature condition of 90° C. to 120° C. using a filter, before introducing the liquid raw material comprising a phthalate based compound and having a HAZE value of 6% or less;
- a step of introducing a neutralization agent and water and mixing them, before the filtering;
- and a step of stripping under a nitrogen atmosphere, after the introduction of the neutralization agent and water and before filtering,
- wherein the neutralization agent is introduced in an amount of 0.5 to 3 wt %, based on the total weight of the liquid-phase raw material,
- the water is introduced in an amount of 0.5 to 3 wt %, based on the total weight of the liquid-phase raw material, and
- acid value of a hydrogenation product separated after the hydrogenation is 0.15 KOHmg/g or less.
Dependencies are inferred from the claim text.