Richard O Laakso, 75Brooksville, FL

6368453, Apr 9, 2002

Mar 7, 2000

09/520761

Auvo K. Kettunen - Neuvoton, FI
Richard O. Laakso - Queensbury NY
C. Bertil Stromberg - Glens Falls NY
J. Robert Prough - Glens Falls NY
Jay J. Miele - Queensbury NY

Andritz Inc. - Glens Falls NY

D21C 706

162 52, 162238, 162246, 162253

In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.

6582554, Jun 24, 2003

May 13, 2002

10/142944

Kaj O. Henricson - Kotka, FI
C. Bertil Stromberg - Glens Falls NY
Richard Laakso - Queensbury NY
John F. Bolles - Queensbury NY
Keith P. Vogel - Queensbury NY
Patrick J. Sullivan - Argyle NY

Andritz Inc. - Glens Falls NY

D21C 326

162 17, 162 19, 162 52, 162232, 162237, 162239, 162243

A method is disclosed for extracting liquor from a cellulose slurry for a continuous digester comprising the steps of: providing the cellulose slurry of liquor and chips of cellulose fiber material to a separator; extracting a first stream of liquor from the separator; extracting a second stream of liquor from the separator, where the second stream has an effective alkali (EA) concentration greater than the EA concentration of the first steam; outputting the first stream from the separator and outputting the second stream from the separator separately from the second stream, and outputting a condensed slurry from the separator to a digester vessel.

2001000, May 31, 2001

Jan 19, 2001

09/764297

Bruno Marcoccia - South Glens Falls NY, US
J. Prough - Queensbury NY, US
Richard Laakso - Queensbury NY, US
Joseph Phillips - Queensbury NY, US
Rolf Ryham - Roswell GA, US
Jan Richardsen - Glens Falls NY, US
R. Chasse - Queensbury NY, US

Andritz Ahlstrom, Inc.

D21C003/02

162/042000, 162/061000, 162/082000

Kraft pulp of increased strength and bleachability may be produced with decreased consumption of effective alkali, and at a lower H factor, by keeping the dissolved organic material (DOM) concentration low substantially through the entire kraft cook, including by extracting high DOM liquid from at least one part of a continuous digester and replacing it with much lower level DOM liquid. Existing pulp mills having two-vessel hydraulic, one-vessel hydraulic, or other systems may be retrofit to provide for extractions and additions of low DOM dilution liquor (including substantially DOM-free white liquor). Also, commercial size batch digesters (8 tons per day of pulp or more) can be operated with low DOM liquor to produce increased strength pulp. Using dilution with low DOM liquor also results in reduced H factor and effective alkali consumption, and increased bleachability.

2001002, Oct 4, 2001

Jun 4, 2001

09/871970

Auvo Kettunen - Neuvoton, FI
Richard Laakso - Queensbury NY, US
C. Stromberg - Glens Falls NY, US
J. Prough - Glens Falls NY, US
Jay Miele - Queensbury NY, US

Andritz-Ahlstrom Inc.

D21C003/26
D21C007/06

162/019000, 162/052000

In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.

2003008, May 15, 2003

Dec 18, 2002

10/321424

Auvo Kettunen - Neuvoton, FI
Richard Laakso - Queensbury NY, US
C. Stromberg - Glens Falls NY, US
J. Prough - Glens Falls NY, US
Jay Miele - Queensbury NY, US

Andritz, Inc.

D21C001/10
D21C003/26
D21C007/06
D21C007/08

162/019000, 162/052000, 162/246000, 162/068000, 162/242000

In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.

2003008, May 15, 2003

Dec 18, 2002

10/321428

Auvo Kettunen - Neuvoton, FI
Richard Laakso - Queensbury NY, US
C. Stromberg - Glens Falls NY, US
J. Prough - Glens Falls NY, US
Jay Miele - Queensbury NY, US

Andritz Inc.

D21C003/26
D21C007/14
D21C007/06
D21C007/08
D21C007/12

162/019000, 162/052000, 162/049000, 162/246000, 162/242000, 162/238000

In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.

2003008, May 15, 2003

Dec 18, 2002

10/321436

Auvo Kettunen - Neuvoton, FI
Richard Laakso - Queensbury NY, US
C. Stromberg - Glens Falls NY, US
J. Prough - Glens Falls NY, US
Jay Miele - Queensbury NY, US

Andritz Inc.

D21C003/26
D21C007/06
D21C007/08

162/019000, 162/052000, 162/246000, 162/238000

In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.

2003008, May 15, 2003

Dec 18, 2002

10/321439

Auvo Kettunen - Neuvoton, FI
Richard Laakso - Queensbury NY, US
C. Stromberg - Glens Falls NY, US
J. Prough - Glens Falls NY, US
Jay Miele - Queensbury NY, US

Andritz, Inc.

D21C003/26
D21C007/06
D21C007/08
D21C007/14

162/019000, 162/052000, 162/239000, 162/246000

In the feeding of a slurry of comminuted cellulosic fibrous material to a digester (continuous or batch) in the production of chemical pulp, one of the tanks used in the feed system (which preferably includes a high pressure feeder) may be eliminated without consequent loss of its function by providing a single tank with the combined functions of controlling the level of liquid in a slurrying conduit which supplies slurry to a slurry pump, and storing and substantially continuously supplying liquid to a make-up liquid pump connected to the digester. The single tank preferably surrounds the slurrying conduit and is substantially concentric, and in liquid communication, with it. A gap of 3-48 inches may be provided between the bottom of the conduit and a connection to the slurry pump. A screen or strainer may be provided in the gap, which is substantially surrounded by the tank. The return system from the low pressure outlet of the high pressure feeder to the slurrying device (like the conduit and tank surrounding it, or a conventional clip tube) may be devoid of one or more of an in-line drainer, level tank, centrifugal separator, and surge tank.