Processes are disclosed for separating at least one gas from a gaseous feed mixture containing at least one other gas comprising passing the gaseous feed mixture to at least two permeator stages in series. Each permeator stage contains a separation membrane which has a feed side and a permeate exit side and exhibits selective permeation of the at least one gas as compared to the permeation of the at least one other gas of the gaseous mixture. A total pressure differential is maintained across th...

Efficient utilization of hydrogen in a hydrocracking system is obtained by recovering in a first gas-liquid separation zone hydrogen by gas-liquid separation of hydrocrackate at a pressure of at least about 75 percent of the pressure in the hydrocracking zone, and recovering in a second gas-liquid separation zone hydrogen from the separated liquid phase from the first gas-liquid separation zone, said second gas-liquid separation zone being at a pressure less than 75 percent of the pressure in th...

Surfaces of substrates which are difficult to bond strongly, e.g. polyethylene, are subjected to ultraviolet radiation in the presence of a photosensitizer and bonded with an adhesive comprising an elastomer and a reactive aldehyde resin to form a structurally strong joint.

This invention relates to a thermographic process of image formation and more particularly to such a process for forming images by heating, imagewise, to a temperature above a softening temperature, but below the thermal decomposition temperature, a solid layer of a mixture of a thermoplastic, amorphous, organic polymer and a liquid plasticizer therefor, the mixture being capable of existing in a metastable state and a stable state for a period sufficient to convert the stable polymer to the met...

A capsule useful in processes for stabilizing and reinforcing rock formations and for securing elements in boreholes, said capsule containing in a multiplicity of compartments materials capable of producing a solid composition and comprising at least one non-supple reinforcing member located within said capsule.

A method of carrying out an electrochemical reaction comprises setting up a fluidized bed of particles at least some of which have at least their surfaces conducting or semi-conducting, using upwardly flowing liquid electrolyte, with or without reactant liquid, for the purpose, and applying a voltage gradient across at least a portion of said fluidized bed of particles, the size of particles, the conductivity of and rate of flow of the said electrolyte and/or reactant liquid and the voltage grad...

The end-point of an operation in which the flow properties of particulate material are altered during agitation is determined using a probe inserted into the vessel in which agitation occurs and which deflects when hit by material being agitated and detecting when the amplitude and/or frequency of the deflections of the probe changes to a given level.

When flocculating an aqueous suspension of suspended solids using a high molecular weight synthetic polymeric flocculant, the shear stability of the flocs is increased if the polymeric material includes polymeric particles of below 10 .mu.m dry size. The flocculated solids can therefore be subjected to shear without increasing the amount of discrete suspended solids in the aqueous medium and generally they are subjected to shear by shearing the aqueous medium containing them, either before dewat...

Stiffening process for sheet material particularly for parts of shoe uppers. In the stiffening process, liquid reagents are mixed and formed into a pliable plastic stiffener layer at an intermediate stage of cure. With the stiffener layer disposed against the material to be stiffened, the assembly is shaped and heated to soften the plastic and establish adhesion between the plastic stiffener layer and the sheet material and the plastic is thereafter cured to heat resistant, shape-retaining condi...

A rendering process in which fats and oils are rendered from fat and oil bearing raw materials. The process comprises reducing the particle size of the raw material, heating the reduced raw material in a rendering vessel to a rendering temperature without the introduction of any process water and/or steam while establishing fluidization of the raw material within tallow resident in the rendering vessel and moving a flow of the heated material to a separator.