A process for obtaining higher aliphatic alcohols starting from aliphatic primary alcohols by condensation reactions is disclosed. Specifically, the process comprises a step in which an aliphatic primary alcohol is contacted in a homogeneous phase with a catalyst mixture comprising a transition metal, a base and an additive; specifically, this additive can be selected from the classes of compounds of the isoquinolines N-oxide, quinolines N-oxide, pyridines N-oxide, benzoquinones, naphthoquinones, or TEMPO. In particular, the process can be carried out by contacting said aliphatic primary alcohol with a catalyst of a recycled transition metal, with a freshly added base and with a recycled additive of the aforementioned type.

An object of the present invention is to provide a chemical liquid purification method which makes it possible to obtain a chemical liquid having excellent defect inhibition performance. Another object of the present invention is to provide a chemical liquid. The chemical liquid purification method according to an embodiment of the present invention is a chemical liquid purification method including obtaining a chemical liquid by purifying a substance to be purified containing an organic solvent, in which a content of the stabilizer in the substance to be purified with respect to the total mass of the substance to be purified is equal to or greater than 0.1 mass ppm and less than 100 mass ppm.

The present invention relates to an anhydrosugar alcohol composition having enhanced storage stability, and an anhydrosugar alcohol storage method, and more specifically, to an anhydrosugar alcohol composition having enhanced storage stability by comprising anhydrosugar alcohol and an amine-based additive; and to a method by which anhydrosugar alcohol having excellent quality may be provided by having the storing of the anhydrosugar alcohol performed under the existence of the amine-based additive, thereby remarkably enhancing the storage stability of the anhydrosugar alcohol.

The present invention relates to an anhydrosugar alcohol composition having enhanced storage stability, and an anhydrosugar alcohol storage method, and more specifically, to an anhydrosugar alcohol composition having enhanced storage stability by comprising anhydrosugar alcohol and an amine-based additive; and to a method by which anhydrosugar alcohol having excellent quality may be provided by having the storing of the anhydrosugar alcohol performed under the existence of the amine-based additive, thereby remarkably enhancing the storage stability of the anhydrosugar alcohol.

The present invention relates to a method for preparing high-purity 1,3-cyclohexanedimethanol capable of achieving a high conversion rate by allowing most of the reactant to participate in the reaction, and of increasing reaction efficiency and economic efficiency by further simplifying the reaction process, while minimizing by-products within a shorter period of time.

Specifically, the method for preparing 1,3-cyclohexanedimethanol includes reducing 1,3-cyclohexanedicarboxylic acid in the presence of a metal catalyst, which is fixed to a silica support and includes a ruthenium (Ru) compound, a tin (Sn) compound and a platinum (Pt) compound in a weight ratio of 1:0.8 to 1.2:1.2 to 2.4.

Provided herein are bioderived 1,3-butanediol compositions and systems and processes for producing such bioderived 1,3-butanediol compositions.

Provided herein are bioderived 1,3-butanediol compositions and systems and processes for producing such bioderived 1,3-butanediol compositions.

A MEG stream having a first pH level is contacted with a CO.sub.2-rich gas stream to yield a MEG product having a second different and lower pH level. The system and method can be readily incorporated into a slipstream MEG recovery package, with a source of the MEG stream being a MEG regeneration section of the package. The CO.sub.2-rich gas could be a vented CO.sub.2 stream from the MEG reclamation section of the package. Unlike hydrochloric and acetic acid overdosing, CO.sub.2 overdosing of the lean MEG stream does not lead to rapid acidification of the MEG product to be stored or injected.

A MEG stream having a first pH level is contacted with a CO.sub.2-rich gas stream to yield a MEG product having a second different and lower pH level. The system and method can be readily incorporated into a slipstream MEG recovery package, with a source of the MEG stream being a MEG regeneration section of the package. The CO.sub.2-rich gas could be a vented CO.sub.2 stream from the MEG reclamation section of the package. Unlike hydrochloric and acetic acid overdosing, CO.sub.2 overdosing of the lean MEG stream does not lead to rapid acidification of the MEG product to be stored or injected.

A MEG stream having a first pH level is contacted with a CO.sub.2-rich gas stream to yield a MEG product having a second different and lower pH level. The system and method can be readily incorporated into a slipstream MEG recovery package, with a source of the MEG stream being a MEG regeneration section of the package. The CO.sub.2-rich gas could be a vented CO.sub.2 stream from the MEG reclamation section of the package. Unlike hydrochloric and acetic acid overdosing, CO.sub.2 overdosing of the lean MEG stream does not lead to rapid acidification of the MEG product to be stored or injected.