PL1391B1

PL1391B1 - Method for producing chlorosulfonic acid.

Info

Publication number: PL1391B1
Application number: PL1391A
Authority: PL
Filing date: 1921-03-12
Publication date: 1925-02-28

Description

Znamy juz kilka sposobów wyrobu kwasu chlorosulfonowego. Mozna np. zapomoca kwasu siarczanego wyzwolic z soli kuchennej gaz chlorowodorowy, który jednak do prze¬ prowadzenia zamierzonej reakcji musi byc zu¬ pelnie suchy; w tym celu przepuszczamy ge przez wieze, zraszana kwasem siarczanym stezonym, lub przez inny podobny aparat. U- zysk}any suchy gaz badz zbieramy z kwasem pyrosiarczanym, badz, (por. pat. niem. 228424) roztwarzamy wraz z gazem SOs w kwasie chlorosulfonowym, badz wreszcie laczyrnv HC1 i SO;r w wiezach reakcyjnych i t. p.Wszystkie te metody wymagaja gazu chloro¬ wodorowego czystego i suchego.Niniejszy wynalazek daje znaczne upro¬ szczenie procesu, zapewniajac jednoczesnie wydatne zalety technicznej i (gospodarcze. W tym celu wprowadzamy zwolna do ogrzewane¬ go kotla alun tudziez sól kuchenna w odpowied¬ nich ilosciach, wyzwalajace sie przytem zupel¬ nie suchy gaz chlorowodorowy tudziez S03 wiaza sie bezposrednio w kwas chlorosulfono- wy. W innej retorcie ogrzewamy alun i wy¬ dzielajace sie przytem opary S08 wprowadza* my wraz z gazami z kotla pierwszego do ol- bieralnika, w którym nastepuje calkowite po¬ laczenie obu cial na czysty kwas chlorosul- fonowy.Najwazniejsza zalete nowego sposobu stano¬ wi okolicznosc, ze odpada tu zupelnie koniecz¬ nosc wytwarzania chlorowodoru suchego. Po¬ nadto wypada zaznaczyc, ze dotad dla wy¬ twarzania bezwodnika destylowano alun moz¬ liwie wysokoprocentowy, co czynilo proces kosztownym. Poniewaz natomiast tutaj desty¬ lacja soli kuchennej zachodzi z alunem niskiej procentowosci, nie potrzeba przeto i w dru¬ giej retorcie stosowac alunu wysokoprocen¬ towego, lecz mozna proces prowadzic w takisposób, ze pozostaly wodzian znajduje na¬ tychmiast zastosowanie do fabrykacji alunu, t. j. bez jakichkolwiek strat. Przy zastosowa¬ niu nieustannego odprowadzania z pierwszej panwi wytwarzajacego sie dwusiarczanu mozna prowadzic fabrykacje sposobem cia¬ glym. PLWe already know several ways to produce chlorosulfonic acid. For example, it is possible to use sulfuric acid to liberate the hydrogen chloride gas from the table salt, but it must be completely dry for the intended reaction to be carried out; for this purpose, we pass the ge through towers, sprinkled with concentrated sulfuric acid, or through another similar apparatus. The obtained dry gas or collected with pyrosulphate acid, or (cf. German Pat. 228424) is dissolved with SOs gas in chlorosulphonic acid, or finally combined HCl and SO; reaction in reaction towers etc. All these methods require gas clean and dry hydrogen chloride. The present invention greatly simplifies the process, while at the same time providing significant technical and economic advantages. For this purpose, we slowly introduce alum or table salt into the heated kettle in appropriate amounts, thus releasing not dry hydrogen chloride gas or SO3 is directly bound to chlorosulfonic acid. In another retort we heat the alum and the vapors S08 released along with the gases from the first boiler are introduced into the tank where the two are completely combined. into pure chlorosulfonic acid. The most important advantage of the new method is that it is completely unnecessary to produce dry hydrogen chloride. It should be noted that hitherto, alumno was distilled as high as possible to produce the anhydride, which made the process expensive. Since, on the other hand, the distillation of table salt here takes place with low-percentage alum, it is not necessary to use high-grade alum in the second retort, but the process can be carried out in such a way that the remaining hydrate is immediately used in the production of alum, i.e. without any precipitate. By using the continuous discharge of the disulfate produced from the first pan, the fabrication can be carried out continuously. PL

Claims

Patent claims. CLAIMS 1. A method for the production of chlorosulfonic acid, characterized in that the distillation of the sulfuric anhydride is partly related to the distillation of the hydrogen chloride gas.

2. The method according to claim ], it is characterized by the fact that alum and table salt are continuously introduced into the boiler during heating, and the liquid disulfate formed is continuously discharged, simultaneously drawing off the simultaneously produced chlorosulfonic acid and excess hydrogen chloride to the collecting vessel.

3. The method according to claim 2, characterized by the fact that in a separate retort, sulfuric anhydride vapors are continuously produced by the flow and heating of the alum, which are discharged into the collecting vessel to bind the excess of hydrochloric gas, and at the same time continuously collect the sulfuric acid monohydrate to regenerate the alum.

4. The method according to claim 3, characterized by the fact that the sulfuric acid monohydrate flowing out of the receiver is used after the reaction is completed to bind the excess sulfuric anhydride.

Pukerfabrik Skodawerke-Wetzler A.

6. Deputy: M. Skrzypko w s ki, patent attorney. ZAKLBRAF.KOZIANSKI IN WARSAW PL