This productivity evaluation method is for evaluating productivity of a chemical substance in a process comprising a first step of obtaining gas from a waste material and a second step of synthesizing a chemical substance from the gas obtained in the first step in the presence of a catalyst, said method including: a first carbon mass calculation stage of calculating mass of carbon contained in the waste material, a second carbon mass calculation stage of calculating mass of carbon contained in the chemical substance produced in said process, and a productivity evaluation stage of evaluating the productivity of the chemical substance based on values of the mass of carbon which are calculated in the first carbon mass calculation stage and the second carbon mass calculation stage.

This productivity evaluation method is for evaluating productivity of a chemical substance in a process comprising a first step of obtaining gas from a waste material and a second step of synthesizing a chemical substance from the gas obtained in the first step in the presence of a catalyst, said method including: a first carbon mass calculation stage of calculating mass of carbon contained in the waste material, a second carbon mass calculation stage of calculating mass of carbon contained in the chemical substance produced in said process, and a productivity evaluation stage of evaluating the productivity of the chemical substance based on values of the mass of carbon which are calculated in the first carbon mass calculation stage and the second carbon mass calculation stage.

Recycled content triacetin (r-triacetin) is produced using a process and system that applies physical and/or credit-based recycled content from one or more feed materials to triacetin produced from the feed materials.

A butadiene production system and a butadiene production method are provided in which the yield is high and environmental load can be reduced. The butadiene production system (1) includes: a gas preparation device (10) that heats raw materials to prepare a mixed gas including hydrogen and carbon monoxide; an ethanol production device (12) that is provided downstream of the gas preparation device (10) and brings the mixed gas into contact with a first catalyst to obtain ethanol; a butadiene production device (16) that is provided downstream of the ethanol production device (12) and brings the ethanol into contact with a second catalyst to obtain butadiene; and return means (18) for returning hydrogen, ethylene, and the like, which are produced as by-products in the butadiene production device (16), to the gas preparation device (10). In addition, in the butadiene production method, the butadiene production system (1) is used.

A butadiene production system and a butadiene production method are provided in which the yield is high and environmental load can be reduced. The butadiene production system (1) includes: a gas preparation device (10) that heats raw materials to prepare a mixed gas including hydrogen and carbon monoxide; an ethanol production device (12) that is provided downstream of the gas preparation device (10) and brings the mixed gas into contact with a first catalyst to obtain ethanol; a butadiene production device (16) that is provided downstream of the ethanol production device (12) and brings the ethanol into contact with a second catalyst to obtain butadiene; and return means (18) for returning hydrogen, ethylene, and the like, which are produced as by-products in the butadiene production device (16), to the gas preparation device (10). In addition, in the butadiene production method, the butadiene production system (1) is used.

A butadiene production system and a butadiene production method are provided in which butadiene can be produced with a high yield. The butadiene production system (1) includes: a gas preparation device (10) that heats raw materials to prepare a mixed gas including hydrogen and carbon monoxide; an ethanol production device (12) that is provided downstream of the gas preparation device (10) and brings the mixed gas including hydrogen and carbon monoxide into contact with a first catalyst to obtain ethanol; a butadiene production device (16) that is provided downstream of the ethanol production device (12) and brings the ethanol into contact with a second catalyst to obtain butadiene; and return means (18) for returning hydrogen, which is produced as a by-product in the butadiene production device (16), to the ethanol production device (12). In addition, in the butadiene production method, the butadiene production system (1) is used.

Disclosed is a method for synthesizing a sitagliptin intermediate, the method comprising: in the presence of hydrogen and a transition metal catalyst having a chiral phosphine ligand, subjecting a compound of formula II to an asymmetric reductive amination with ammonia or ammonium salt in a proper organic solvent under the condition of adding an acidic additive to produce a compound of formula I, wherein, an R- or S-configuration of a stereocenter is represented by *; the compound of formula I of R configuration can be used to prepare sitagliptin, and a reaction formula is as follows: R.sup.1 and R.sup.2 are each independently selected from hydrogen, C.sub.1-C.sub.12 linear or branched alkyl, C.sub.3-C.sub.12 cycloalkyl, C.sub.2-C.sub.12 alkenyl, C.sub.2-C.sub.12 alkynyl and C.sub.7-C.sub.12 arylalkyl. The method has a high yield and a high ee % value, a mild reaction condition and a low production cost, and is simple to operate, convenient to purify, environmental friendly and suitable for industrial production.

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Provided is a process capable of converting the cokes on spent catalysts in a fluid catalytic cracking (FCC) process into synthesis gas. The produced synthesis gas contains high concentrations of CO and H.sub.2 and may be utilized in many downstream applications such as syngas fermentation for alcohol production, hydrogen production and synthesis of chemical intermediates. A reducer/regenerator reactor for a fluid catalytic process comprising a chemical looping system to produce synthesis gas is also described.

A system and method for converting waste and secondary materials into synthesis gas (syngas) through the use of a molten metal bath gasifier for the initial breakdown of waste feeds and an A/C plasma reactor for complete dissociation of waste feeds into syngas, and an anaerobic digester. The system includes a heat recovery and steam power generation process for the production of electricity. The system produces a net output of electricity above plant load sufficient for the co-production of renewable Hydrogen and Oxygen. The process does not require the use of fossil fuels or fossil feedstocks during normal operations, and it eliminates combustion produced stack emissions or landfill residuals.

Embodiments include a method for converting renewable energy source electricity and a hydrocarbon feedstock into a liquid fuel by providing a source of renewable electrical energy in communication with a synthesis gas generation unit and an air separation unit. Oxygen from the air separation unit and a hydrocarbon feedstock is provided to the synthesis gas generation unit, thereby causing partial oxidation reactions in the synthesis gas generation unit in a process that converts the hydrocarbon feedstock into synthesis gas. The synthesis gas is then converted into a liquid fuel.