Hoechst Aktiengesellschaft

Other

Wilhelm Riemenschneider

Peter Wegener

Karl-Heinz Tetzlaff

Hans-Joachim Kiessling

Helmut Meidert

Hans Krekeler

Dieter Ulmschneider

Gunter Leuschner

Process for the preparation of .beta.-hydroxypolyamines by reaction of polyepoxide compounds with ammonia, in which at least one polyepoxide compound is treated in a first stage with liquid ammonia at temperatures below 50.degree. C., a homogeneous phase being formed, after which the reaction between the polyepoxide compound and ammonia is carried out in a second stage at 60.degree. to 130.degree. C., and when the reaction is complete, the excess ammonia is removed from the reaction mixture. The resulting .beta.-hydroxypolyamines are used as binders or--in protonated form--as binders which can be diluted with water, by themselves or in combination with suitable crosslinking agents.

Process for the preparation of beta-hydroxypolyamines by reaction of

The invention relates to a process for the production of chloroalkylsulfonyl isocyanates of the formula ##STR1## by a catalytically induced reaction of chlorosulfonyl isocyanate with one or more C.sub.2 -C.sub.4 -olefins. The reaction is carried out in a continuous manner in a tubular reactor.

Continuous process for the production of chloroalkyl-sulfonyl isocyanates

The invention provides a quick-action locking means for pressure vessels, consisting of a holder to which the top of the pressure vessel containing connections and/or measuring equipment is rigidly mounted, a presser, and a sliding spacer device positioned between the detachable lower part of the pressure vessel and the presser. The lower part of the pressure vessel positioned on the spacer device is pressed against the top by the presser. The locking means of the invention allows rapid opening and closing of the pressure vessel without using tools and without dismounting tubular ducts and fittings.

Pressure vessel having quick-action locking means

Cyanoformamide is prepared when cyanogen is contacted with a catalyst solution containing low molecular aliphatic carboxylic acids, from 0.025 to 1.0 mole/1 of copper-(II)-salts and up to 5% by weight of water. Hydrogen cyanide can be used instead of cyanogen, if the catalyst solution contains nitrate ions in addition.

Process for preparing cyanoformamide

Cyanogen is produced by catalytic oxidation of hydrogen cyanide with oxygen in the presence of a catalyst solution. The catalyst solution consists of aliphatic ethers or of nitriles and copper(II)nitrate and may further contain up to 20 % by weight of water.

Process for the manufacture of cyanogen

By contacting hydrogen cyanide with oxygen or air and a catalyst solution containing water, low molecular weight aliphatic carboxylic acids, copper ions and nitrate ions oxalic acid diamide is formed in high yields.

Process for the preparation of oxamide

A process for the preparation of a mixture of carbon tetrachloride and phosgene in the absence of a catalyst from

Growing community of inventors

Frankfurt-am-Main, Germany

Wilhelm Riemenschneider