A process for forming a polymeric solution or gel having a viscosity of at least about 50,000 cps which includes forming a solvent system of an organic liquid and a polar consolvent, the polar consolvent being less than about 15 wt. % of the solvent system, the viscosity of the solvent system being less than about 1,000 cps; dissolving a neutralized sullonated polymer in the solvent system to form...

Methods and apparatus are disclosed for shaping illuminating beams from continuous duty searchlights or the like so as to minimize the effect of backscattered illumination and, to thereby increase the brightness contrast between illuminated target objects and background so as to improve visibility. More specifically, a continuous duty illumination system comprising an optical system in which the d...

Aggregate pellets (A) with pores (B) are coated with a coating (4) of acryl, epoxy or other waterproof adhesive agent or a paraffin agent. The use of such coated aggregate permits a substantial reduction in concrete weight.

1. A brake comprising at least one braking rotor (9) which runs in a closed rotor housing (11) in which there is a working medium (12), wherein there is a braking action which si dependent on the direction of rotation of the braking rotor (9), in particular for retraction units for two cables in two lifts, characterized in that the working medium (12) which occupies only a part of the interior of ...

Improvements in interior sprayable wall plasters are effected by incorporating therein at least one hydroxypropylhydroxyethylcellullose having specified substitution levels as a water retention aid or thickener.

Disclosed are sprayable fireproof coatings having incorporated therein at least one hydroxypropylhydroxyethylcellulose having specified substitution levels as a water retention aid and thickener.

The invention concerns new xylite derivatives, methods for the production of these compounds as well as compositions containing them having growth regulatory activity for plants.

Disclosed is a process for preparing the known antitumor glycosides: 4'-epidaunorubicin, 3',4'-diepidaunorubicin, and their doxorubicin analogs by oxidizing the C-4' hydroxyl group of N-protected daunorubicin to form certain novel intermediates having a 4'-keto configuration, followed by reduction of the keto group with NaBH4 and mild alkaline hydrolysis to remove the N-protecting acyl groups.

A kanamycin derivative of the formula IV is prepared by reacting 6-carbobenzoxykanamycin A with, for example, benzaldehyde to give the corresponding Schiff's base which, after reaction with the N-hydroxy-5-norbornene-2,3-dicarboximide ester of L- gamma -benzyloxycarbonylaminoalpha -hydroxybutyric acid and subsequent hydrogenation of the residue in situ, yields the compound IV. The process ...

Isomerization of xylenes admixed with other alkyl aromatics of at least eight carbon atoms is conducted at essentially atmospheric pressure at 800 DEG -1000 DEG F. with a zeolite like zeolite ZSM-5 of reduced acid activity.

The invention relates to a process to improve the stability of a catalyst to be used for lowering the cloud or turbidity point and the filterability limit temperature of gas-oils. The catalyst is formed of a composite system constituting 5 to 90% of a hydrodesulfuration type catalyst A and 95 to 10% of a hydroconversion type catalyst B, these two catalysts being either mixed or superposed, in whic...

A door (1) for a T-shaped opening in a wall comprises two door leaves (2, 3) of a flexible material and a number of horizontal cross bars (7-9) guided at their ends by vertical guide rails (20, 21) mounted on the wall. The door leaf (2) is suspended from the top of the opening and has means (12, 17) for hoisting the cross bars (7-9) so that the door leaves (2, 3) fold up. The cross bar (7) is long...

There is provided a cross-flow diffusion column possessing improved properties for maritime use and for use at high gas velocities, this column comprising novel trays of the shelf type. The trays are provided with perforations for a downwardly flowing liquid phase and at least one opening for an upwardly flowing gas phase. Arranged on the upper surfaces of respective trays is a lattice structure c...

Known methods for the disinfection or sterilisation of water entail a hypochlorite solution being prepared electrochemically in an electrolysis cell and being metered into the water to be disinfected. In order to make possible low-cost preparation of the hypochlorite solution without great effort under defined conditions in such methods, and to provide a method and an apparatus which are particula...