公开(公告)号：GB1032806A

公开(公告)日：1966-06-15

申请号：GB1451063

申请日：1963-04-11

Applicant: BASF AG

Inventor： KUNZER WERNER ,  HENGST KONRAD ,  DIEBEL HANS ,  LEUTERT FRITZ

IPC: C01B7/00 ,  C01B7/01

Abstract: In the manufacture of hydrochloric acid by the adiabatic absorption in water of a fluctuating supply of impure hydrogen chloride, the concentration of the effluent acid is maintained constant by controlling the water supply in response to said concentration whereby the temperature of the adsorption zone is sufficiently high to entrain impurities in the steam produced. Should the hydrogen chloride concentration decrease, the water supply is increased to form a dilute acid which is withdrawn, stored and fed instead of water in an ensuing period of high hydrogen chloride concentration in the feed gas. The working temperature is preferably 80-100 DEG C. As shown in Fig. 1, hydrogen chloride containing gas passes through pipe 1 into absorption packing 3. When the amount of hydrogen chloride gas is insufficient for the working temperature to be reached, absorption water is supplied through pipe 4, controlled by valve 26, from tank 14. The water level in tank 14 is kept constant. The hydrochloric acid formed passes through into pipe 7, where its electrical conductivity is measured by 8, overflows at 9, passes through gas seal 10, cooler 11, by-passing closed valve 23 and is stored in container 13. When the rate of supply of hydrogen chloride gas is high enough for sufficient heat to be generated by absorption for enough water to evaporate to create a temperature of 80-100 DEG C. at temperature sensing device 16, temperature regulator 27 firstly switches on concentration regulator 29 which now controls the amount of absorption liquid supplied to the absorption tower, secondly opens valve 23 so that pure acid flows into a reservoir (not shown), and thirdly causes contaminated hydrochloric acid to be pumped from tank 13 into tank 14 after a selected lapse of time, which closes valve 25 to stop the flow of water. The level in the tank is controlled by overflow 20. The contaminated hydrochloric acid is now supplied to the absorption tower, and when tank 14 is empty, valve 25 opens and water is again fed in. If the supply rate of hydrogen chloride falls below a certain minimum determined by the flow of water and the size of the column, flow regulator 32 restores the control of the flow of water to remote control 21 and closes valve 23, whereby contaminated acid is again collected in container 13.

公开(公告)号：CA760898A

公开(公告)日：1967-06-13

申请号：CA760898D

Applicant: BASF AG

Inventor： KUNZER WERNER ,  DIEBEL HANS ,  HENGST KONRAD ,  LEUTERT FRITZ

公开(公告)号：FR1354606A

公开(公告)日：1964-03-06

申请号：FR932033

申请日：1963-04-19

Applicant: BASF AG

Inventor： KUNZER WERNER ,  HENGST KONRAD ,  DIEBEL HANS ,  LEUTERT FRITZ

IPC: C01B7/00 ,  C01B7/01

公开(公告)号：GB1020475A

公开(公告)日：1966-02-16

申请号：GB1478863

申请日：1963-04-16

Applicant: BASF AG

Inventor： DIEBEL HANS

IPC: G01F1/60 ,  G01R1/28

Abstract: 1,020,475. Potentiometric measurement; flowmeters BADISCHE ANILIN & SODA-FABRIK A.G. April 16, 1963 [April 17, 1962], No. 14788/63 Headings G1N and G1U. A circuit for measuring a voltage on which an alternating interference voltage is superimposed, comprises a Hall generator delivering a voltage which is opposed to the voltage to be measured, the resultant difference being applied to the input of an amplifier producing a D.C. output which is used to generate the magnetic field of the Hall generator, and a control current of the same phase as the interference being supplied to the Hall generator. In Fig. 1 the current through the field coils 2, 2 1 of a magnetic flowmeter passes through a transformer 5 the output of which controls a Hall generator 3. The output of the flowmeter is connected through a transformer 6 in opposition to the output of Hall generator 3 and the difference is fed to an amplifier 7. The output of amplifier 7 is rectified in a phase-dependent rectifier 8 which receives a reference phase from transformer 9 in series with coils 2 and 2 1 . The D.C. output from rectifier 8 is amplified by D.C. amplifier 10 and feeds the coil 4 producing the magnetic field of the generator and also flows through an indicating, recording, or control instrument 11. In a modification, Fig. 2 (not shown), the voltage to be measured is the output of a bridge circuit and the same source is used to energize the bridge circuit and to control the Hall generator connected in opposition to the output of the bridge circuit. Fig. 3 shows a circuit for compensating for the effect of a factorial disturbance and two additive disturbances of known phase. The input U1 is connected in series opposition to three Hall generators and the difference is amplified by amplifier 7 and fed to three phase-controlled rectifiers 8a-8c. The reference voltages U a -U c and the control currents i a -i c are all in phase with the corresponding components of the input voltage. The control current i a is related to magnetic fields, mains voltage fluctuation or other factorial disturbances in the same way as is the quantity to be measured. In another arrangement, Fig. 4 (not shown), a battery is connected to the coil 4 so that the current through the coil may be of either polarity.

公开(公告)号：FR1353438A

公开(公告)日：1964-02-21

申请号：FR931749

申请日：1963-04-17

Applicant: BASF AG

Inventor： DIEBEL HANS

IPC: G01F1/60