公开(公告)号：GB905759A

公开(公告)日：1962-09-12

申请号：GB3145160

申请日：1960-09-13

Applicant: BASF AG

Inventor： SPORMANN WALTER ,  HEINKE JOACHIM

IPC: C01D5/18

Abstract: Salts containing little or no water of crystallization, and having a negative solubility coefficient, are prepared from the corresponding salts of a greater degree of hydration by a process comprising at least two stages, in the first of which the salt is heated to a temperature between the conversion temperature and about 7 DEG C. above the conversion temperature, and in the last of which the temperature is maintained at about the point at which the desired product exhibits the lowest solubility. Salts referred to include sodium, cadmium, cerous, ferrous, manganous and uranium sulphates. Specification 331,674 also is referred to.

公开(公告)号：GB899566A

公开(公告)日：1962-06-27

申请号：GB3191360

申请日：1960-09-16

Applicant: BASF AG

Inventor： SPORMANN WALTER ,  HEINKE JOACHIM

IPC: C01D5/14

Abstract: Sodium or potassium sulphites are prepared from alkali metal hydroxide, carbonate or bicarbonate solutions by atomizing such solutions into a sulphur dioxide-containing gas under such conditions that the water of the solution is substantially p immediately vaporized and the sulphite is obtained in dry form. Formation of sulphate is thereby prevented. Depending on flow rates and humidities the sulphur dioxide gas may be at 20 DEG -150 DEG C. and may contain as high as 50 parts by volume of oxygen. The alkali metal salt solutions preferably contain more than 10% by weight of hydroxide or carbonate and the solution is preferably atomized into an upwardly directed gas stream which entrains the solid alkali metal sulphite formed.

公开(公告)号：BE595102A

公开(公告)日：1961-03-15

申请号：BE595102

申请日：1960-09-15

Applicant: BASF AG

Inventor： SPORMANN WALTER ,  HEINKE JOACHIM

IPC: C01D5/14 ,  C01D

公开(公告)号：FR1209124A

公开(公告)日：1960-02-29

申请号：FR1209124D

申请日：1958-05-12

Applicant: BASF AG

Inventor： SPORMANN WALTER ,  HETTLER FRIEDRICH

IPC: C01D5/00