Disclosed is a method of catalytic oxidation of lignite using oxygen as an oxidant at atmospheric pressure, belonging to a method of mild oxidation of lignite. The method is used to mildly oxidize the lignite using the oxygen as the oxidant under the action of a nitroxide radical catalyst and a metal salt or metal oxide cocatalyst; the process comprises the following steps: pulverizing the lignite to 200 meshes or less, drying a pulverized coal sample at a temperature of 80 C. in vacuum for 10 h, weighing 0.5 g of the treated coal sample, sequentially adding 10 ml of acetic acid, 0.5 mmol of a catalyst and 0.15 to 0.25 mmol of a cocatalyst into a round-bottom flask, connecting a tee joint to an upper orifice of a condenser pipe, replacing oxygen in vacuum for three times so that the round-bottom flask is filled with the oxygen, keeping oxygen pressure at 0.1 MPa, reacting at a temperature of 80 C. to 120 C. for 4 to 12 h; filtering after the reaction is finished; decompressing a filtrate to remove the acetic acid, adding a small amount of ethyl acetate to dissolve, then using an excess CH.sub.2N.sub.2/ether solution to esterify for 10 h at room temperature, using 0.45 m filter paper to filter, and analyzing an esterified product through a gas chromatography-mass spectrometer. The method has the advantages of using the oxygen as the oxidant, having low price, having no toxicity, and achieving environmental protection and mild conditions.

Disclosed is a method of catalytic oxidation of lignite using oxygen as an oxidant at atmospheric pressure, belonging to a method of mild oxidation of lignite. The method is used to mildly oxidize the lignite using the oxygen as the oxidant under the action of a nitroxide radical catalyst and a metal salt or metal oxide cocatalyst; the process comprises the following steps: pulverizing the lignite to 200 meshes or less, drying a pulverized coal sample at a temperature of 80 C. in vacuum for 10 h, weighing 0.5 g of the treated coal sample, sequentially adding 10 ml of acetic acid, 0.5 mmol of a catalyst and 0.15 to 0.25 mmol of a cocatalyst into a round-bottom flask, connecting a tee joint to an upper orifice of a condenser pipe, replacing oxygen in vacuum for three times so that the round-bottom flask is filled with the oxygen, keeping oxygen pressure at 0.1 MPa, reacting at a temperature of 80 C. to 120 C. for 4 to 12 h; filtering after the reaction is finished; decompressing a filtrate to remove the acetic acid, adding a small amount of ethyl acetate to dissolve, then using an excess CH.sub.2N.sub.2/ether solution to esterify for 10 h at room temperature, using 0.45 m filter paper to filter, and analyzing an esterified product through a gas chromatography-mass spectrometer. The method has the advantages of using the oxygen as the oxidant, having low price, having no toxicity, and achieving environmental protection and mild conditions.

The present invention is in the field of producing bio-based commodity organic chemicals such as bio-acrylic acid, bio-acrylonitrile, and bio-1,4-butanediol using renewable carbon sources as feedstock. In the first stage of the present invention, bio-1,3-propanediol is derived from renewable carbon sources through microbial fermentation. In the second stage of the present invention, bio-1,3-propanediol is converted into bio-acrylic acid or bio-acrylonitrile or bio-1,4-butanediol.

The present invention is in the field of producing bio-based commodity organic chemicals such as bio-acrylic acid, bio-acrylonitrile, and bio-1,4-butanediol using renewable carbon sources as feedstock. In the first stage of the present invention, bio-1,3-propanediol is derived from renewable carbon sources through microbial fermentation. In the second stage of the present invention, bio-1,3-propanediol is converted into bio-acrylic acid or bio-acrylonitrile or bio-1,4-butanediol.

The present invention relates to Ras inhibitors and to methods for preparing Ras inhibitors.

Processes for separating a di-carboxylic acid or salt thereof from a mixture containing the di-carboxylic acid or salt thereof and one or more other components are provided. Also separation media useful for these separation processes is provided. In particular, processes for preparing an aldaric acid are described, such as glucaric acid from glucose, which includes separating the aldaric acid from the reaction product. Also, various glucaric acid products are described.

Disclosed are methods for polypropylene decomposition. Also disclosed are products obtained from the decomposition polypropylene including carboxylic acids, dicarboxylic acids, nitro-substituted carboxylic acids and dicarboxylic acids; as well as the salts, esters, and anhydrides thereof.

Disclosed are methods for polypropylene decomposition. Also disclosed are products obtained from the decomposition polypropylene including carboxylic acids, dicarboxylic acids, nitro-substituted carboxylic acids and dicarboxylic acids; as well as the salts, esters, and anhydrides thereof.