ASSIGNMENT AND CONSENT

EXHIBIT 99.8

ASSIGNMENT AND CONSENT

     This Assignment and Consent is made this 12^th day of February, 2008 among the undersigned.

     WHEREAS, Dr. Xxxxxx Xxxxxxxxx and Xxxxx Xxxxxxxxx (collectively “Gunnerman”) on the one hand and Xxxxx Capital LP and Iroquois Master Fund Ltd. (“Xxxxx” and “Iroquois”, respectively) on the other hand, entered into as of February 12, 2008, a Stock Purchase Agreement, Stock Option Agreement, Lockup Agreement, Purchase Escrow Agreement, and Stock Option Funds Escrow Agreement (collectively, “Transaction Documents”) in connection with the sale and purchase and option to purchase common stock of Sulphco, Inc. (“Common Stock”); and

     WHEREAS, Gunnerman, Xxxxx and Iroquois agree to realign and assign the interests of Xxxxx and Iroquois in the Transaction Documents.

     NOW, THEREFORE, in consideration of the mutual covenants, conditions and agreements herein contained, and intending to be legally bound, the parties hereto hereby agree as follows:

     1. The interests and Proportionate Amounts of Xxxxx and Iroquois are assigned and realigned in the amounts set forth on Schedule A hereto.

     2. The undersigned assignees agree that their signatures below are deemed to be their signatures and consent to their being parties to the Transaction Documents and entitled to the rights and benefits and bound by the obligations under the Transaction Documents in the amounts and interests set forth on Schedule A hereto, as if the undersigned assignees had executed such Transaction Documents.

     3. Gunnerman consents to the assignment and realignment described in this Assignment and Consent.

     4. This Assignment and Consent may be signed by facsimile and delivered electronically.

     IN WITNESS WHEREOF, the undersigned have executed this Assignment on the date first above written.

/s/ Xxxxxx Xxxxxxxxx				/s/ Xxxxx Xxxxxxxxx
XXXXXX XXXXXXXXX				XXXXX XXXXXXXXX

[SIGNATURE PAGE TO ASSIGNMENT AND CONSENT]

[SIGNATURE PAGES TO ASSIGNMENT AND CONSENT]

     IN WITNESS WHEREOF, the undersigned have executed this Assignment on the date first above written.

Name of Assignee: Xxxxxx Xxxxxxxxx

Signature of Authorized Signatory of Buyer: /s/ Xxxxxx Xxxxxxxxx

Name of Authorized Signatory: Xxxxxx Xxxxxxxxx

Title of Authorized Signatory:                                                            

Fax Number of Assignee:  

Address for Notice to Assignee:

With a copy to (which shall not constitute notice):

Grushko & Xxxxxxx, P.C.
000 Xxxxx Xxxxxx, Xxxxx 0000
Xxx Xxxx, XX 00000
Attn: Xxxxxxx Xxxx, Esq.
Fax: (000) 000-0000
Email: xxxxxxxxx@xxx.xxx

Address for Delivery of Securities for Assignee (if not same as above):

Proportionate Amount: 3.33%

[SIGNATURE PAGES CONTINUE]

2

[SIGNATURE PAGES TO ASSIGNMENT AND CONSENT]

     IN WITNESS WHEREOF, the undersigned have executed this Assignment on the date first above written.

Name of Assignee: Xxxxxx Xxxxxxxxx

Signature of Authorized Signatory of Assignee: /s/ Xxxxxx Xxxxxxxxx

Name of Authorized Signatory: /s/ Xxxxxx Xxxxxxxxx

Title of Authorized Signatory:                                                                                

Fax Number of Assignee:  

Address for Notice to Assignee:

With a copy to (which shall not constitute notice):

Grushko & Xxxxxxx, P.C.
000 Xxxxx Xxxxxx, Xxxxx 0000
Xxx Xxxx, XX 00000
Attn: Xxxxxxx Xxxx, Esq.
Fax: (000) 000-0000
Email: xxxxxxxxx@xxx.xxx

Address for Delivery of Securities for Assignee (if not same as above):

Proportionate Amount: 2%

[SIGNATURE PAGES CONTINUE]

3

[SIGNATURE PAGES TO ASSIGNMENT AND CONSENT]

     IN WITNESS WHEREOF, the undersigned have executed this Assignment on the date first above written.

Name of Assignee: Xxxxx Xxxxxxx

Signature of Authorized Signatory of Assignee: /s/ Xxxxx Xxxxxxx

Name of Authorized Signatory: /s/ Xxxxx Xxxxxxx

Title of Authorized Signatory:                                                                                

Fax Number of Assignee:  

Address for Notice to Assignee:

With a copy to (which shall not constitute notice):

Grushko & Xxxxxxx, P.C.
000 Xxxxx Xxxxxx, Xxxxx 0000
Xxx Xxxx, XX 00000
Attn: Xxxxxxx Xxxx, Esq.
Fax: (000) 000-0000
Email: xxxxxxxxx@xxx.xxx

Address for Delivery of Securities for Assignee (if not same as above):

Proportionate Amount: 2%

[SIGNATURE PAGES CONTINUE]

4

[SIGNATURE PAGES TO ASSIGNMENT AND CONSENT]

     IN WITNESS WHEREOF, the undersigned have executed this Assignment on the date first above written.

Name of Assignee: Xxxxx Xxxx Irrevocable Trust

Signature of Authorized Signatory of Assignee: /s/ Xxxxxx Xxxx, Trustee

Name of Authorized Signatory: /s/ Xxxxxx Xxxx, Trustee

Title of Authorized Signatory: Trustee

Fax Number of Assignee:  

Address for Notice to Assignee:

With a copy to (which shall not constitute notice):

Grushko & Xxxxxxx, P.C.
000 Xxxxx Xxxxxx, Xxxxx 0000
Xxx Xxxx, XX 00000
Attn: Xxxxxxx Xxxx, Esq.
Fax: (000) 000-0000
Email: xxxxxxxxx@xxx.xxx

Address for Delivery of Securities for Assignee (if not same as above):

Proportionate Amount: 11.33%

[SIGNATURE PAGES CONTINUE]

5

[SIGNATURE PAGES TO ASSIGNMENT AND CONSENT]

     IN WITNESS WHEREOF, the undersigned have executed this Assignment on the date first above written.

Name of Assignee: Xxxx Xxxxx

Signature of Authorized Signatory of Assignee: /s/ Xxxx Xxxxx

Name of Authorized Signatory: /s/ Xxxx Xxxxx

Title of Authorized Signatory:                                                                                 

Fax Number of Assignee:  

Address for Notice to Assignee:

With a copy to (which shall not constitute notice):

Grushko & Xxxxxxx, P.C.
000 Xxxxx Xxxxxx, Xxxxx 0000
Xxx Xxxx, XX 00000
Attn: Xxxxxxx Xxxx, Esq.
Fax: (000) 000-0000
Email: xxxxxxxxx@xxx.xxx

Address for Delivery of Securities for Assignee (if not same as above):

Proportionate Amount: 11.33%

[SIGNATURE PAGES CONTINUE]

6

[SIGNATURE PAGES TO ASSIGNMENT AND CONSENT]

     IN WITNESS WHEREOF, the undersigned have executed this Assignment on the date first above written.

Name of Assignee: Iroquois Capital Opportunity Fund L.P.

Signature of Authorized Signatory of Assignee: /s/ Xxxx Xxxxx

Name of Authorized Signatory: Xxxx Xxxxx

Title of Authorized Signatory: General Partner

Fax Number of Assignee:  

Address for Notice to Assignee:

With a copy to (which shall not constitute notice):

Grushko & Xxxxxxx, P.C.
000 Xxxxx Xxxxxx, Xxxxx 0000
Xxx Xxxx, XX 00000
Attn: Xxxxxxx Xxxx, Esq.
Fax: (000) 000-0000
Email: xxxxxxxxx@xxx.xxx

Address for Delivery of Securities for Assignee (if not same as above):

Proportionate Amount: 26.67%

[SIGNATURE PAGES CONTINUE]

7

[SIGNATURE PAGES TO ASSIGNMENT AND CONSENT]

     IN WITNESS WHEREOF, the undersigned have executed this Assignment on the date first above written.

Name of Assignee: Iroquois Master Fund Ltd.

Signature of Authorized Signatory of Buyer: /s/ Xxxxxx Xxxxxxxxx

Name of Authorized Signatory: Xxxxxx Xxxxxxxxx

Title of Authorized Signatory: Authorized Signatory

Fax Number of Assignee:  

Address for Notice to Assignee:

With a copy to (which shall not constitute notice):

Grushko & Xxxxxxx, P.C.
000 Xxxxx Xxxxxx, Xxxxx 0000
Xxx Xxxx, XX 00000
Attn: Xxxxxxx Xxxx, Esq.
Fax: (000) 000-0000
Email: xxxxxxxxx@xxx.xxx

Address for Delivery of Securities for Assignee (if not same as above):

Proportionate Amount: 13.34%

[SIGNATURE PAGES CONTINUE]

8

[SIGNATURE PAGES TO ASSIGNMENT AND CONSENT]

     IN WITNESS WHEREOF, the undersigned have executed this Assignment on the date first above written.

Name of Assignee: Xxxxx Capital LP

Signature of Authorized Signatory of Assignee: /s/ Xxxxxx Xxxxx

Name of Authorized Signatory: Xxxxxx Xxxxx

Title of Authorized Signatory: General Partner

Fax Number of Assignee:  

Address for Notice to Assignee:

With a copy to (which shall not constitute notice):

Grushko & Xxxxxxx, P.C.
000 Xxxxx Xxxxxx, Xxxxx 0000
Xxx Xxxx, XX 00000
Attn: Xxxxxxx Xxxx, Esq.
Fax: (000) 000-0000
Email: xxxxxxxxx@xxx.xxx

Address for Delivery of Securities for Assignee (if not same as above):

Proportionate Amount: 30%

9