| Patent Number |
Title Of Patent |
Date Issued |
| 7217302 |
Process for cooling solid and gaseous material during gasification of spent liquor |
May 15, 2007 |
| Process for the recovery of chemicals and energy from spent liquor obtained in the chemical pulping process, in which the spent liquor is gasified under sub-stoichiometric conditions to produce partly one phase of solid and/or fused material, together with partly one phase of a flamm |
| 6790246 |
Apparatus for gasification of spent liquor |
September 14, 2004 |
| Arrangement for understoichiometric gasification of spent liquor from chemical pulp production, comprising an upper reactor part (2), which upper reactor part is provided with a burner (5) for the spent liquor and with an internally clad reactor jacket (4), and a lower separating part |
| 6780211 |
Device for gasification of spent liquor |
August 24, 2004 |
| Device for the understoichiometric gasification of spent liquor from chemical pulp production under centrifugal influence, which device comprises an upper reactor part (1), which upper reactor part is provided with an inlet (31) having a nozzle (8) for combusting the spent liquor, a |
| 6500301 |
Apparatus for gasification of spent liquor |
December 31, 2002 |
| Arrangement for understoichiometric gasification of spent liquor from chemical pulp production, comprising an upper reactor part (2), which upper reactor part is provided with a burner (5) for the spent liquor and with an internally clad reactor jacket (4), and lower separating part (8) |
| 6336994 |
Totally chlorine free bleaching process using recovered filtrate |
January 8, 2002 |
| The present invention relates to a process for producing pulp which is cooked under alkaline conditions and which is bleached without using chlorine-containing bleaching chemicals, in which process used cooking chemicals are recovered in a first recovery installation and used bleachi |
| 6238468 |
Quench vessel |
May 29, 2001 |
| Provided is a quench vessel having a cooling structure in which a combustion gas is forced down and through a cooling liquid a plurality of times. |
| 6113739 |
Process for washing gas formed by gasifying black liquor |
September 5, 2000 |
| Process for recovering chemicals and energy from black liquor, where the black liquor is gasified with CO, CO.sub.2, CH.sub.4, H.sub.2, and H.sub.2 S, in gaseous form, and Na.sub.2 CO.sub.3, NaOH and Na.sub.2 S, in the form of drops of smelt, being principally formed. The mixture of gas |
| 6062547 |
Quench vessel for recovering chemicals and energy from spent liquors |
May 16, 2000 |
| Provided is a quench vessel containing at least two separate internal vessels. A receiving liquor is contained in the first internal vessel and a washing liquid bath is contained in a second internal vessel. |
| 6030493 |
Process for recovering chemicals and energy from cellulose spent liquor using multiple gasifiers |
February 29, 2000 |
| Provided is a process for recovering chemicals and energy from spent liquor obtained when producing paper pulp by chemical delignificatation of fibrous raw material. The spent liquor is gasified in at least two reactors, a first and a second stream of solid and/or smelt material and |
| 6027609 |
Pulp-mill recovery installation for recovering chemicals and energy from cellulose spent liquor |
February 22, 2000 |
| A Pulp Mill Recovery installation for producing liquors containing different concentrations of recovered process chemicals or combustion gasses containing different concentrations of process chemicals from a spent liquor obtained from the production of pulp. The installation includes |
| 5976321 |
Process for making sulfur enhanced undigested cellulosic fiber material and pulp |
November 2, 1999 |
| Provided is a process for making pulp having the steps of:contacting an undigested cellulosic fiber material with a pretreatment liquid formulated from a mixture comprising alkali metal bicarbonate and alkali metal hydrogen sulfide as reaction components which are dissolved or disbursed |
| 5868805 |
Process for integrated evaporation and gasification of spent liquor from cellulose cooking |
February 9, 1999 |
| The invention relates to a process for integrated evaporation and gasification of spent liquor from the production of cellulose, the gasification taking place in a reactor (1) at a pressure of from atmospheric pressure up to about 150 bar and at a temperature of about 500.degree.-160 |
| 5660685 |
Gasifying black liquor with recycling of generated hydrogen sulphide gas to the gasifier |
August 26, 1997 |
| A method of preparing a digesting liquor having high sulphidity from a spent liquor obtained from digesting cellulosic fiber material, optionally without a conventional causticizing step is provided. Thermal decomposition of the spent liquor is conducted under reducing conditions in |
| 5556602 |
Device in a reactor for gasifying spent liquor |
September 17, 1996 |
| This invention relates to a device for thermal decomposition of stock, especially a spent liquor obtained from pulp manufacture, where the gas stream formed in this connection passes through a liquid bath. The decomposition device has a reactor with a chamber in which thermal decompo |
| 5486269 |
Gasification of carbonaceous material in a reactor having a gasification zone and a combustion z |
January 23, 1996 |
| A method and reactor for thermally decomposing a carbonaceous raw material (6) to recover gas and, if applicable, solid or liquid chemicals, the raw material being fed into a chamber (2) for gasification under under-stoichiometric conditions, the gasification is carried out in a gasi |
| 5439557 |
Method of recovering energy and chemicals from a spent liquor using low frequency sound in a rec |
August 8, 1995 |
| A method of recovering energy and chemicals from a spent liquor which, after thickening to a dry content of 50-90%, is fed into a reaction chamber (1) in which a plurality of temperature zones are maintained, said method comprising the steps of (a) converting the liquid phase in the |
| 5407455 |
Reactor for gasification of cellulose-waste liquors especially black liquor |
April 18, 1995 |
| A reactor for gasification of cellulose-waste liquors, especially black liquor. The reactor includes a reactor cladding a supply for liquor and combustion air in the upper part of the reactor, an outlet opening for gases and other material in the lower part, and a heat-insulating lining |
| 5370771 |
Process for recovering energy and chemicals from spent liquor using low frequency sound |
December 6, 1994 |
| A process and reactor for recovering energy and chemicals from spent liquor obtained in pulp production by thermal decomposing the spent liquor are described, said decomposing being carried out in a reactor at a pressure of from atmospheric pressure up to 150 bar and at a temperature of |
| 5085735 |
Method of refining cellulosic fibrous material with successive expansions before impacts, and ex |
February 4, 1992 |
| A refiner for producing mechanical pulp has greater spacing between bars of the refiner grinding elements than is conventional. The grooves between the bars have a sloping bottom, making an angle of about 1.degree.-30.degree. (preferably 5.degree.-20.degree.) with respect to a straig |
| 5039022 |
Refiner element pattern achieving successive compression before impact |
August 13, 1991 |
| A refiner for producing mechanical pulp has greater spacing between bars of the refiner grinding elements than is conventional. The grooves between the bars have a sloping bottom, making an angle of about 1.degree.-30.degree. (preferably 5.degree.-20.degree.) with respect to a straig |
| 4986480 |
Method and apparatus for feeding a conical refiner |
January 22, 1991 |
| Mechanical cellulosic fibrous material pulp (mechanical pulp to produce paper products) having lower freeness, and enhanced light scattering properties, tensile and tear strengths, for a given energy input, is produced by force feeding a refiner. Using a progressive compacting plugsc |
