Abstract:
Formation of mineral type scale in pressure coking equipment used in coking waste materials in the liquid phase is eliminated by effecting the coking of such materials using direct countercurrent heat exchange with a hot hydrocarbon stream which is kept continuously circulating along the walls of the equipment.
Abstract:
CONTAINING COKE RESULTING FROM COKING THE ACID SPENT KRAFT LIQUOR.
DISCLOSED IS AN IMPROVED AND INTEGRATED KRAFT PULPING PROCESS WHEREIN THE WOOD CHIPS ARE PRETREATED IN AN ALKALINE "BUFFER" MEDIUM CONTAINING H2S AT A PARTIAL PRESSURE OF ABOUT 90 TO 110 P.S.I.G. AT ABOUT 260* F. THE HYDROGEN SULFIDE IS PRODUCED BY COKING IN THE LIQUID PHASE A SPENT KRAFT PULPING LIQUOR THAT HAS BEEN MADE ACID WITH ABSORBED, SO2. THIS SO2 IS GENERATED BY BURNING SULFUR-
Abstract:
A LIQUID HYDROCARBON FUEL IS REACTED WITH HYDROGEN AND H2O OVER A NICKEL OXIDE-CHROMIUM OXIDE CATALYST AT HIGH PRESSURE TO PRODUCE A METHANE-RICH FUEL GAS. PREFERABLY, HYDROGEN IN THE PRODUCT GAS IS RECOVERED AND TOTALLY RECYCLED TO THE REACTION ZONE. OPTIONALLY, CO2 MAY BE REMOVED FROM THE PRODUCT GAS PRODUCING SUBSTANTIALLY PURE METHANE.
Abstract:
The liquid phase coking of waste alkaline sulfite pulp liquors can be effected at a faster rate and a lower temperatures by lowering the pH of such liquors by at least one pH unit. Also desirably, both the coke yield is increased and the Chemical Oxygen Demand of the resulting effluent is lowered. The pH lowering is achieved by adding sulfur dioxide to the waste liquor either as free SO2 or a water solution of SO2. The effluent and the chemicals recovered after coking can be recycled in the paper pulp process from which they were recovered.
Abstract:
A process or system employing membrane separation to recover helium from a petroleum gas well. It includes pressure actuated compressing apparatus connected to the membrane separator so as to automatically compress the recovered helium.