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6790313 |
Method of cleaning sulfide contaminated condensates
A method to remove sulfides and other volatile contaminants from liquor vapor condensate in a pulp manufacturing process, where the mentioned liquor vapor condensate is fed into a stripper, which...
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6315861 |
Process for conditioning ozone gas recycle stream in ozone pulp bleaching
A method for conditioning an ozone gas recycle stream in an ozone pulp bleaching process. The method includes the steps of providing an oxygen containing feed gas to an ozone generator; generating...
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6280567 |
System and method for treatment of cellulose-containing material prior to pulp digestion
The invention relates to a process system and a method for preliminary treatment of disintegrated cellulose-containing material, preferably wood chips, prior to pulp digestion. The process system...
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6179958 |
Method for continuous cooking of cellulose-containing fibre material
A method for cooking chips, involving steaming the chips, impregnating the chips with impregnating liquid in an impregnation vessel, which impregnating liquid comprises fresh cooking liquid and...
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6168642 |
Industrial utilization of garbage with effective recycling and with optimization in energy production
A recycling process for garbage containing a high proportion of paper where printed paper is first separated from the garbage. The garbage is then into pieces and light and heavy components are...
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6103057 |
Kraft digesting process wherein a vapor interface is formed by withdrawing hot cooking liquor
A method for use in a batch digesting process is provided which includes the removal of a portion of the hot cooking liquor from the digester prior to the cook creating a liquid-vapor interface in...
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6059925 |
Method to regenerate gas mixture in ozone-bleaching process
A method of treating cellulose pulp which is subjected to an oxygen-delignification stage (3), a washing stage (4), an ozone-bleaching stage (1) and a further bleaching stage, for instance a...
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5989387 |
Method for controlling chloride concentration in the flue gas of a recovery boiler
A method for adjusting the chlorine equilibrium in a sulphate cellulose process, wherein part of the chlorine contained in the cycle is separated and removed. In the method, strong odour gases from...
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5911853 |
Method for treating paper mill condensate to reduce the amount of sulfur compounds therein
The invention described in the specification is a method for removing hydrogen sulfide, volatile mercaptans and methyl sulfides from a paper mill condensate stream. In the method, carbon dioxide is...
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5562804 |
Method for adjusting the sulphur/sodium ratio in the flue gases of a soda recovery boiler
A method for adjusting the sulphur/sodium ratio in a soda recovery boiler when strong sulphurous odour gases are burned therein. According to the method, sodium is introduced into the soda recovery...
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5277759 |
Method of controlling sulfidity of a sulfate cellulose mill
To decrease the sulfur emissions of a sulfate cellulose mill, black liquor is heated before the last effect of the evaporation at a temperature higher than the cooking temperature of the sulfate...
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5234546 |
Polysulfide production in white liquor
Off gases from black liquor heat treatment, evaporators, wood pulp digesters, etc. are treated to produce primarily hydrogen sulfide and sulfur free fuel gases such as methane, carbon monoxide,...
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5198074 |
Process to produce a high quality paper product and an ethanol product from bamboo
A method of producing high quantities of ethanol and a high quality pulp to produce a variety of papers. The method comprises preparing the bamboo by chipping, shredding and washing. This bamboo...
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4925527 |
Method for the recovery of turpentine and heat in a refiner pulping process
A method for recovering turpentine and heat in a TMP process in which woodchips are heated in a preheater and the vent vapors from the preheater are passed to the condensing vapor zone of an...
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4915784 |
Process and apparatus for removing contaminants from pulp digester vent gas
There is provided a process and apparatus for improving the yield of turpentine collectable from the vent gases emanating from a pulp disgester in a kraft paper pulp Process. The apparatus is...
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4872950 |
Process for recovering energy and chemicals from spent liquor in pulp preparation
Eenrgy and process chemicals are recovered from spent liquor in pulp preparation by thermally decomposing the spent liquor to solid and gaseous products at an elevated pressure and with addition of...
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4461648 |
Method for increasing the accessibility of cellulose in lignocellulosic materials, particularly hardwoods agricultural residues and the like
This invention comprises a method for increasing the accessibility of cellulose in lignocellulosic materials to chemical or biochemical reagents. The material is steam cooked for a predetermined...
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4274911 |
Method of cooking cellulose material and preserving the heat and terpentine content of the cooking liquor
A method of cooking cellulose material and effectively preserving the heat and terpentine content of the cooking liquor is disclosed. The cooking liquor is allowed to expand and the expansion steam...
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4259147 |
Pulping process
A versatile process and apparatus is presented for producing, in high yields, many different grades of pulp from a single wood specie or for pulping any specie or type of woody material, and for...
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4071398 |
Chemical concentration by sequential activated carbon adsorption and fractionation
A continuous, low cost method of concentrating dilute streams containing fractions of adsorbable chemicals is disclosed which minimizes heat consumption and provides highly concentrated supplies of...
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3816239 |
RECOVERY OF TERPENES
Disclosed is a method for recovering terpenes from a wet, gaseous stream containing terpene vapor and water vapor by condensing water from the stream by indirect heat exchange to produce an aqueous...
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3607617 |
TURPENTINE RECOVERY FROM THE WET GASEOUS EFFLUENT OF WOOD-PULPING PROCESSES
This application discloses a method and apparatus for improving the recovery of turpentine from the gaseous byproducts of wood-pulping processes through improved condensation and decantation...
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3492198 |
HEAT AND TURPENTINE RECOVERY FROM PULP DIGESTERS
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3414038 |
Heat recovery method and apparatus
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3350258 |
Two stage pulping process including impregnating chips with ammonia, then liberating the ammonia and pulping with magnesium compound
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3183145 |
Odor control and heat recovery in wood pulping process
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1004473 |
Title is not available
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3817824 |
Title is not available
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3764462 |
Title is not available
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3764461 |
Title is not available
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3753851 |
Title is not available
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3745063 |
Title is not available
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