The invention relates to a process for the recovery of aliphatic hydrocarbons from a liquid hydrocarbon feedstock stream comprising aliphatic hydrocarbons, heteroatom containing polar components and optionally aromatic hydrocarbons, said process comprising the steps of: a) mixing the liquid hydrocarbon feedstock stream with a solvent resulting in a liquid mixture; b) cooling the liquid mixture obtained in step a) to a temperature in the range of from +5° C. to −30° C. to obtain wax crystals in the mixture; c) separating wax crystals from the cooled liquid mixture obtained in step b) to produce a wax comprising aliphatic hydrocarbons and a dewaxed liquid mixture comprising solvent, heteroatom containing polar components and optionally aromatic hydrocarbons; d) separating solvent from the liquid mixture obtained in step c) and optionally recycling the separated solvent to step a). Further, the present invention relates to a process for the recovery of aliphatic hydrocarbons from plastics, and to a process for steam cracking a hydrocarbon feed.

The present invention describes the integration of preparative crystallization, crystal separation, crystal washing and freeze-drying processes of insulin and insulin analogues into single continuous process using pressure filtration. The process facilitates time reduction and outlines the novel design of using multiple organic solvent washes and nitrogen gas purging for the removal of imbibed water and achieve final drug substance that meets the quality specifications.

The present invention provides an industrial method production of amorphous posaconazole. The present invention also relates to a method for production of the posaconazole via and novel crystalline forms of posaconazole intermediate. More particularly the present invention relates to novel crystalline forms of posaconazole intermediate and methods for production of novel crystalline forms of posaconazole intermediate represented by the following structural formula III Which is key intermediate in the production of posaconazole. The present invention also provides for the one pot process for the preparation of amorphous posaconazole using novel crystalline forms of benzyl posaconazole. ##STR00001##

Provided is a method for producing cellulose particles or cellulose acetate particles. By a production method including: (a) dissolving cellulose acetate in an organic solvent and preparing a cellulose acetate solution; (b) obtaining an emulsion of the cellulose acetate solution and an aqueous medium using a porous membrane; and (c) precipitating cellulose acetate particles from the emulsion, cellulose acetate particles are produced. By further saponifying the cellulose acetate obtained by the production method, cellulose particles are produced.

A system and method for separating desirable elements from typically undesirable byproducts of a cannabis extraction system is disclosed. The system and method may separate terpenes and/or THC from residue byproducts that may typically be discarded as waste. The system and method includes at least two unique steps of refinement that may result in purity levels of 90% for the terpenes and 90% for the THC.

The present invention discloses a methanol-mediated method for separating an alkaline solution of hemicellulose, and an ethanol-mediated method for separating an alkaline solution of hemicellulose, where methanol/ethanol is added into the alkaline solution in which hemicellulose is dissolved, and stirred thoroughly until the mixture is homogeneous, to destroy the hydrated layer effect formed between the hemicellulose and the alkaline solution through the methanol/ethanol-mediated hydrophobic effect, such that hemicellulose is precipitated from the solution system, and then the mixture is subjected to separation by sedimentation, centrifugation or filtration to obtain a precipitate of hemicellulose and an alkaline solution of methanol/ethanol; and by using the prompting effect of an alkaline condition on evaporation and gasification separation of methanol/ethanol from water, a reduced-pressure distillation (rectification) or gasification membrane is used to separate methanol/ethanol from the alkaline solution, and the obtained alkaline solution and methanol/ethanol are reused for dissolution and separation of hemicellulose. By the complete reuse of the alkaline solution and methanol/ethanol in the method of the present invention, it achieves efficient, clean and economical production of alkaline dissolution and separation of hemicellulose, and the separation and recovery efficiency of the hemicellulose dissolved in the alkaline exceeds 99%.

A method for precipitating as particles 2,6-diamino-3,5-dinitropyrazine-1-oxide (or ANPZO) present in an acid medium, which comprises adding the acid medium to an aqueous solution and which is characterized in that the aqueous solution comprises a nitrate salt. Further disclosed is a method for synthesizing ANPZO implementing this precipitation method. The synthesis method comprises converting 2,6-diaminopyrazine-1-oxide (or DAPO) into ANPZO by nitration in an acid medium, and then precipitating as particles the ANPZO by adding the acid medium to an aqueous solution, and is characterized in that the aqueous solution comprises a nitrate salt.

The present invention describes the integration of preparative crystallization, crystal separation, crystal washing and freeze-drying processes into single continuous process using pressure filtration. The process facilitates time reduction, and outlines the novel design of using multiple organic solvent washes and nitrogen gas purging for the removal of imbibed water and achieve final drug substance that meets the quality specifications.

Disclosed herein is a method for producing high-purity terephthalic acid, including steps of dissolving crude terephthalic acid crystal in water and performing catalytic hydrogenation treatment, depressurizing and cooling a reaction liquid after the catalytic hydrogenation treatment in stages with two or more stages of crystallization vessels, to crystallize terephthalic acid to obtain a terephthalic acid slurry, introducing the terephthalic acid slurry into an upper portion of a mother liquor replacement tower, bringing the terephthalic acid crystal into contact with an upward flow of replacement water introduced from a tower lower compartment of the mother liquor replacement tower while making the terephthalic acid crystal settled down in the tower, withdrawing the terephthalic acid crystal as slurry with the replacement water from the tower lower compartment, subjecting the slurry withdrawn from the tower lower compartment to solid-liquid separation into water and the terephthalic acid crystal, and drying the separated terephthalic acid crystal.

The present invention provides a crystal of reduced glutathione that is stable, and is easy to process, and a method for producing the crystal. According to the present invention, a crystal of a metal salt of reduced glutathione is produced by suspending an amorphous solid of a metal salt of reduced glutathione in a hydrophobic organic solvent, and adding water to the resulting suspension to precipitate a crystal of a metal salt of reduced glutathione.