Other

Susanna M Karpacheva

Nikolai S Enikolopov

Semen F Sholk

Mikhail G Brusilovsky

Viktor A Pekarsky

Anatoly I Nepomnyaschy

Jury S Ivanov

Valeryan M Muratov

Valerian M Muratov

Svetlana A Gavrilina

Jury P Vorobiev

Viktor A Shiyanov

Lidia P Khorkhorina

Arkady L Iljushin

Tatyana A Pekarskaya

Viktor P Serebryakov

Naum D Lerman

Oleg K Maimur

Lazar O Ioffe

Irina S Kukurechenko

Mikhail A Markevich

A process for preparing epoxy resin comprises a step of allowing a mixture of epichlorohydrin, 2,2-bis(p-hydroxyphenyl)propane, and a solvent in the presence of an alkali used in an amount of from 0.4 to 5% by weight of the epichlorohydrin to stay at a temperature of from 45.degree. to 70.degree. C. to obtain a homogeneous mass. Subsequently an alkali used in an amount of from 45 to 50% by weight of the epichlorohydrin is added to the resultant mass, and polycondensation is conducted at a temperature of 70.degree. to 90.degree. C. under stirring to obtain the end product.

Process for preparing epoxy resin

Apparatus for the production of a lignocellulose material from chips, sawdust, chopped plants, bark, small fibres comprising a vertical column with a series of successively-mounted horizontal perforated plates partly abutting upon the inner surface of the column; at the free ends of said plates retaining baffles are secured for partial entrapment of coarse particles of the product; a clearance is provided between the baffle and inner surface of the column and the plates are disposed relative to each other so that baffles of each successive plate are located diametrically opposite to the baffles of each preceding plate thus forming a zigzag labyrinth along the total height of the column for increasing the time of contact of coarse particles of the raw materials with the oxygen-containing gas and alkaline reagent. A pulsator means is operably connected to the column for setting liquid reagents in the column into reciprocating vertical motion. Each plate being formed with a plurality of openings, at least some of the openings having a plurality of guide vanes so that the liquid reagents upon passing through the openings will move horizontally with respect to the plates.

Reaction vessel with pulsating means for producing lignocellulose

Growing community of inventors

Moscow, Russia

Susanna M Karpacheva