METHOD FOR PRODUCING PURIFIED ACETIC ACID

    公开(公告)号:US20230123364A1

    公开(公告)日:2023-04-20

    申请号:US17913973

    申请日:2021-03-22

    Abstract: Provided is a method for producing purified acetic acid with a good hue. A method for producing purified acetic acid, including treating acetic acid having a poor hue with a synthetic adsorbent to obtain acetic acid with an improved hue. The acetic acid to be treated is, for example, acetic acid having an absorbance of 0.01 or greater at a wavelength of 430 nm. The acetic acid to be treated may be acetic acid recovered from an acetic acid-containing solution that is discharged in a cellulose acetate production process. The synthetic adsorbent may have a cation exchange group on a resin surface. The synthetic adsorbent may have a pore structure.

    METHOD OF INCREASING BIOAVAILABILITY AND/OR PROLONGING OPHTHALMIC ACTION OF A DRUG

    公开(公告)号:US20230098352A1

    公开(公告)日:2023-03-30

    申请号:US18061848

    申请日:2022-12-05

    Abstract: The present invention relates to a method of increasing the bioavailability and/or prolonging ophthalmic action of a drug, the method comprising instilling into the eye an aqueous suspension comprising reversible clusters of drug loaded nano-resin particles, said clusters having a D50 value of at least 2 micrometer and said drug loaded nano-resin particles have a particle size distribution characterized in that the D90 value is 70 nanometer to 900 nanometer. The present invention further relates to an aqueous suspension comprising reversible clusters of drug loaded nano-resin particles, said clusters have a D50 value of at least 2 micrometers and said drug loaded nano-resin particles have a particle size distribution characterized in that the D90 value is 70 nanometers to 900 nanometers.

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