Abstract: The invention relates to a method of producing a high-monoester sucrose higher fatty acid ester with a monoester content of at least 90%. In accordance with this invention, a sucrose higher fatty acid ester which is actually a mixture of the corresponding monoester, diester, triester, etc. is dissolved in 1 to 12 parts by weight of a solvent having a specific inductive capacity, at 25.degree. C., of 30 to 50 at an elevated temperature, the precipitate formed on subsequent cooling is removed to recover a supernatant and the solvent is removed from the supernatant. In accordance with the invention, a high-monoester sucrose higher fatty acid ester can be produced easily and with good reproducibility.

Abstract: This invention relates to a method of producing sucrose fatty acid ester granules by the fluidized bed granulation and drying technique and consists in forming a fluidized bed comprising a sucrose fatty acid ester powder at a temperature not exceeding 60.degree. C., spraying the fluidized bed with an aqueous sucrose fatty acid ester solution having a concentration of 3-20% by weight, as a binder, and then drying the sprayed fluidized bed, to thereby cause granulation. In accordance with the invention, the disintegration of sucrose fatty acid ester granules during granulation and drying can be prevented and highly pure sucrose fatty acid ester granules can be obtained. The sucrose fatty acid ester granules produced by the method of the invention are incapable of forming a cloud of fine powder, and have very good dispersibility and solubility.

Abstract: A hoisting winch for cranes or the like having a power transmission system assembled in a final reduction drive of the winch and arranged such that arresting of the whole planetary gear set meshing with a ring gear connected to a spooling drum and releasing of the arrest can be effected by arresting a carrier and by releasing the arrest and that a rotary drive power from an input shaft is transmitted to the spooling drum when the carrier is held against rotation, brake means adapted to be spring applied and hydraulically released with its control circuit to arrest or release the carrier, and an adjustable pressure reducing valve provided in the control circuit for adjusting and controlling a braking force of the brake means.