Dana C Johnson

US Patent:

6451062, Sep 17, 2002

Filed:

Sep 23, 1998

Appl. No.:

09/159519

Inventors:

Dana J. Johnson - Broomfield CO
Terry L. McAninch - Westminster CO
Frederick W. Holzhauer - Broomfield CO

Assignee:

Birko Corporation - Henderson CO

International Classification:

C14C 102

US Classification:

8 9418, 8 9415, 252 857, 422 28, 422 32, 427389, 510275, 510382, 510383

Abstract:

The invention relates to an improved hide-curing additive comprising an effective biocidal amount of an essential oil and a non-ionic surfactant. The improved additive provides an effective cure for the hides, is environmentally safe and economical.

US Patent:

7449420, Nov 11, 2008

Filed:

Mar 19, 2004

Appl. No.:

10/804459

Inventors:

Shyh-Yuan Henry Hwang - Newton MA, US
Waheed A. Mukaddam - Cambridge MA, US
Francis A. Demers - Holderness NH, US
Dana Johnson - Hopkinton MA, US

Assignee:

Stone & Webster Inc. - Houston TX

International Classification:

B01J 20/34

US Classification:

502 31, 502 56

Abstract:

Improved processes are provided for the production of alkyl aromatic compounds using zeolite catalyst(s) and for periodic reactivation in situ of zeolite catalyst(s) that have at least in part become deactivated. Processes according to this invention are typically carried out in a reaction section loaded with catalyst(s) wherein a desired alkyl aromatic compound is produced from feed aromatic and olefin compounds followed by a separation section in which the desired product is isolated and recovered. Alkylation, transalkylation, and/or isomerization reactions that occur in the reaction section are carried out in liquid phase or partial liquid phase over the said zeolite catalyst(s). At least a portion of the zeolite catalyst(s) employed in the reaction section is (are) reactivated in situ, periodically or when deemed necessary, by contacting the deactivated catalyst(s), at elevated temperature and in the substantial absence of olefin feedstock, with an aromatic stripping stream comprising the feed aromatic compound, the desired alkyl aromatic product, byproducts formed in the process, or mixtures thereof, to restore its (their) activity.

US Patent:

7777086, Aug 17, 2010

Filed:

Feb 27, 2003

Appl. No.:

10/505787

Inventors:

Shyh-Yuan Hwang - Newton MA, US
Maruti Bhandarkar - Joel Nagar, IN
Chung-Ming Chi - Weymouth MA, US
Waheed Mukaddam - Cambridge MA, US
Frank Demers - Holderness NH, US
Richard F. Guarino - East Freetown MA, US
Dana E Johnson - Hopkinton MA, US

Assignee:

Stone & Webster, Inc. - Houston TX

International Classification:

C07C 2/66
C07C 7/04

US Classification:

585448, 585809

Abstract:

Improved integrated processes for the production of alkyl aromatic compounds are disclosed wherein aromatic compounds which may be treated for removal of deleterious substances are reacted with olefin compounds, which may also be treated for contaminant removal, in the presence of acidic zeolite catalyst(s) to produce the desired alkyl aromatic compound(s). The aromatic and preferably also the olefin feeds are treated substantially to remove contaminants, particularly the nitrogen compounds contained therein, before they are brought together for reaction in the presence of the zeolite catalyst(s). In accordance with the present invention, it has been found that feed pretreatment for removal of nitrogen compounds significantly improves the run length and life of the acidic zeolite catalyst(s). The feed pretreatment of this invention may include the steps of distillation, extraction, and/or adsorption by solid adsorbent, which may be regenerated in accordance with further embodiments of this invention.

US Patent:

8211239, Jul 3, 2012

Filed:

Sep 18, 2009

Appl. No.:

12/586174

Inventors:

Dana J. Johnson - Arvada CO, US

Assignee:

Birko Corporation - Henderson CO

International Classification:

C23G 1/02

US Classification:

134 3, 134 2, 134 10, 134 221, 134 2214, 134 2219, 134 19, 134 36, 134 41, 134 42, 510109, 510421

Abstract:

A method for cleaning used beer kegs employing an aqueous solution of phosphoric acid, nitric acid and one or more surfactants, e. g. , a detergent and/or wetting agent. Preferably, the aqueous cleaning solution has a total nitric acid content of 12 wt % or less. Complete cleaning can be achieved without using any caustic. The cleaning solution can be recycled repeatedly to clean multiple kegs on numerous occasions over a period of time, e. g. , several weeks.

US Patent:

20100268008, Oct 21, 2010

Filed:

Jul 6, 2010

Appl. No.:

12/830725

Inventors:

Shyh-Yuan Hwang - Newton MA, US
Maruti Bhandarkar - Joel Nagar, IN
Chung-Ming Chi - Weymouth MA, US
Waheed Mukaddam - Cambridge MA, US
Frank Demers - Holderness NH, US
Richard F. Guarino - East Freetown MA, US
Dana E. Johnson - Hopkinton MA, US

International Classification:

C07C 2/66

US Classification:

585448

Abstract:

Improved integrated processes for the production of alkyl aromatic compounds are disclosed wherein aromatic compounds which may be treated for removal of deleterious substances are reacted with olefin compounds, which may also be treated for contaminant removal, in the presence of acidic zeolite catalyst(s) to produce the desired alkyl aromatic compound(s). The aromatic and preferably also the olefin feeds are treated substantially to remove contaminants, particularly the nitrogen compounds contained therein, before they are brought together for reaction in the presence of the zeolite catalyst(s). In accordance with the present invention, it has been found that feed pretreatment for removal of nitrogen compounds significantly improves the run length and life of the acidic zeolite catalyst(s). The feed pretreatment of this invention may include the steps of distillation, extraction, and/or adsorption by solid adsorbent, which may be regenerated in accordance with further embodiments of this invention.

US Patent:

20130000681, Jan 3, 2013

Filed:

Jul 3, 2012

Appl. No.:

13/541596

Inventors:

Dana J. Johnson - Arvada CO, US
Terry L. McAninch - Westminster CO, US

Assignee:

BIRKO CORPORATION - Henderson CO

International Classification:

C11D 3/60
B08B 9/08

US Classification:

134 2219, 510218

Abstract:

A method for cleaning used storage or processing liquid containers employing an aqueous solution of phosphoric acid, nitric acid and one or more surfactants, e.g., a detergent and/or wetting agent. Preferably, the aqueous cleaning solution has a total nitric acid content of wt % or less. Complete cleaning can be achieved without using any caustic. The cleaning solution can be recycled repeatedly to clean multiple containers on numerous occasions over a period of time, e.g., several weeks.

US Patent:

54726190, Dec 5, 1995

Filed:

Sep 3, 1993

Appl. No.:

8/116364

Inventors:

Frederick W. Holzhauer - Broomfield CO
Dana J. Johnson - Broomfield CO
Terry McAninch - Westminster CO

Assignee:

Birko Corporation - Henderson CO

International Classification:

C02F 172
C02F 124
B03D 1008

US Classification:

210721

Abstract:

A process for the separation and purification of fat-containing waste water including the step of adding an effective flocculating and oxidizing amount of a composition including: 10-30% acetic acid 5-20% peracetic acid 15-25% hydrogen peroxide 1-10% phosphoric acid bal. water The process may also include the addition of ferrous sulfate or other source of ionic iron to accelerate the action of the peracetic acid composition.

US Patent:

56479972, Jul 15, 1997

Filed:

Dec 4, 1995

Appl. No.:

8/567022

Inventors:

Frederick W. Holzhauer - Broomfield CO
Dana J. Johnson - Broomfield CO
Terry McAninch - Westminster CO

Assignee:

Birko Corporation - Henderson CO

International Classification:

C07F 172
C07F 124
B03D 1008

US Classification:

210721

Abstract:

A process for the separation and purification of fat-containing waste water including the step of adding an effective flocculating and oxidizing amount of a composition comprising: 10-30% wt. peracid precursor 15-70% wt. hydrogen peroxide 1-10% wt. phosphoric acid bal. water The process may also include the addition of ferrous sulfate or other source of ionic iron to accelerate the action of the peracid composition.