8. See Smil, op. cit. (note 2), p. 99.
9. The situation resembled an electric cooker hob. Turning the hob off still
leaves it hot for some time. Turning off a gas hob however has an immediate
effect.
10. Recall that moisture was not removed from the water-gas/coke-oven gas mix.
11. Ammonium sulfate was chosen simply because of the availability of sulphuric
acid produced from sulfur dioxide obtained by ‘roasting’ pyrites (FeS) in air.
12. See Smil, op. cit. (note 2), p. 100, his reference no. 59, for the details
concerning the Oppau plant production tonnages.
13. A stuffing box is an assembly which is used to house a ‘gland seal’. It is used to
prevent leakage of fluids such as water, or gases such as steam, between sliding
or turning parts. It was the ‘stuffing box’ of Robert’s circulation pump, that
caused him some concern. See Chap. 8.
14. ‘Conical screw down valve with an angle of inclination between 85° and 90°’.
Submitted in Germany on 16 March 1908. Application submitted in the UK
on 16 July 1908, accepted 01 April 1909, UK Patent No. 15,065.
15. Later, to economise on transport costs, the ammonia was separated as a liquid
by intense cooling as in the original Haber-Le Rossignol process.
16. See Smil, op. cit. (note 2), pp. 100–102 and his reference no. 62.
17. See Smil, op. cit. (note 2), p. 102.
11 From Karlsruhe to Oppau
221
9. The situation resembled an electric cooker hob. Turning the hob off still
leaves it hot for some time. Turning off a gas hob however has an immediate
effect.
10. Recall that moisture was not removed from the water-gas/coke-oven gas mix.
11. Ammonium sulfate was chosen simply because of the availability of sulphuric
acid produced from sulfur dioxide obtained by ‘roasting’ pyrites (FeS) in air.
12. See Smil, op. cit. (note 2), p. 100, his reference no. 59, for the details
concerning the Oppau plant production tonnages.
13. A stuffing box is an assembly which is used to house a ‘gland seal’. It is used to
prevent leakage of fluids such as water, or gases such as steam, between sliding
or turning parts. It was the ‘stuffing box’ of Robert’s circulation pump, that
caused him some concern. See Chap. 8.
14. ‘Conical screw down valve with an angle of inclination between 85° and 90°’.
Submitted in Germany on 16 March 1908. Application submitted in the UK
on 16 July 1908, accepted 01 April 1909, UK Patent No. 15,065.
15. Later, to economise on transport costs, the ammonia was separated as a liquid
by intense cooling as in the original Haber-Le Rossignol process.
16. See Smil, op. cit. (note 2), pp. 100–102 and his reference no. 62.
17. See Smil, op. cit. (note 2), p. 102.
11 From Karlsruhe to Oppau
221