A process for producing acetic acid while efficiently separating permanganate reducing compounds (PRC's) and methyl iodide is provided.

PRC's are separated or removed from a mixed composition (3A) containing PRC's and methyl iodide by distilling the mixed composition in a distillation step (5) to form an overhead stream (5A), a side-cut stream (5B), and a lower stream (5C). In a distillation column of the distillation step (5), an extractant (e.g., water) extracting PRC's preferentially to methyl iodide is added to a concentration zone in which PRC's and methyl iodide are concentrated, and an extraction mixture falling from the concentration zone is withdrawn as the side-cut stream (5B).

A process for treating a composition comprising one or more desired (hydro)halocarbons and one or more undesired halogenated hydrocarbon containing impurities so as to reduce the concentration of at least one undesired halogenated hydrocarbon containing impurity, the process comprising contacting the composition with an adsorbent comprising a carbon molecular sieve.

A process for treating a composition comprising one or more desired (hydro)halocarbons and one or more undesired halogenated hydrocarbon containing impurities so as to reduce the concentration of at least one undesired halogenated hydrocarbon containing impurity, the process comprising contacting the composition with an adsorbent comprising a carbon molecular sieve.

The present invention relates to a film quality improver, a method of forming a thin film using the film quality improver, and a semiconductor substrate fabricated using the method. According to the present invention, side reactions may be suppressed by using a film quality improver having a predetermined structure in a thin film deposition process, and process by-products in a thin film may be removed by appropriately controlling a thin film growth rate. As a result, even when the thin film is formed on a substrate having a complicated structure, step coverage and the thickness uniformity of the thin film may be greatly improved. In addition, corrosion or deterioration may be prevented, and the electrical properties of the thin film may be improved due to improvement in the crystallinity of the thin film.

The present invention relates to a film quality improver, a method of forming a thin film using the film quality improver, and a semiconductor substrate fabricated using the method. According to the present invention, side reactions may be suppressed by using a film quality improver having a predetermined structure in a thin film deposition process, and process by-products in a thin film may be removed by appropriately controlling a thin film growth rate. As a result, even when the thin film is formed on a substrate having a complicated structure, step coverage and the thickness uniformity of the thin film may be greatly improved. In addition, corrosion or deterioration may be prevented, and the electrical properties of the thin film may be improved due to improvement in the crystallinity of the thin film.

The present invention relates to an atom economic procedure of preparing iodoalkanes by hydroiodination of alkenes. In particular the present method features the generation of anhydrous hydrogen iodide from atomic hydrogen and iodine in situ by using transition metal precursor and phosphine ligandcatalyst.

The present invention relates to an atom economic procedure of preparing iodoalkanes by hydroiodination of alkenes. In particular the present method features the generation of anhydrous hydrogen iodide from atomic hydrogen and iodine in situ by using transition metal precursor and phosphine ligandcatalyst.

The invention discloses a compound having branching alkyl chains, the method for preparing the same and use thereof in photoelectric devices. By applying the branching alkyl chains as the solubilizing group to the preparation of organic conjugated molecules (for example, organic conjugated polymers), the number of methylenes between the resultant alkyl side chains and the backbone, i.e., m>1, which can effectively reduce the effect of the alkyl chains on the backbone - stacking, thereby ensuring the solubility of the organic conjugated molecule while greatly increasing the mobility of their carriers. It is suitable for an organic semiconductor material in photoelectric devices such as organic solar cells, organic light emitting diodes and organic field effect transistors, etc.

The invention discloses a compound having branching alkyl chains, the method for preparing the same and use thereof in photoelectric devices. By applying the branching alkyl chains as the solubilizing group to the preparation of organic conjugated molecules (for example, organic conjugated polymers), the number of methylenes between the resultant alkyl side chains and the backbone, i.e., m>1, which can effectively reduce the effect of the alkyl chains on the backbone - stacking, thereby ensuring the solubility of the organic conjugated molecule while greatly increasing the mobility of their carriers. It is suitable for an organic semiconductor material in photoelectric devices such as organic solar cells, organic light emitting diodes and organic field effect transistors, etc.

The present invention provides new stable crystalline N-iodoamides-1-iodo-3,5,5-trimethylhydantoin (1-ITMH) and 3-iodo-4,4-dimethyl-2-oxazolidinone (IDMO). The present invention further provides a process for the preparation of organic iodides using N-iodoamides of this invention and recovery of the amide co-products from waste water.