Document G6y6gp7KKYD4BOYxJxj5Gn0dN
Vista Chemical Company
900 Threadneedle Houston, Texas 77079-2990 (713) 588-3000
P.O. Box 1 9029 Houston, Texas 77224-9029 Fax (713) 588-3236
October 2, 1990
National Sanitation Foundation 3475 Plymouth Road
P. 0. Box 1468 Ann Arbor, Michigan 48106
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/l
^
Attention: Kathy Feist
Dear Kathy:
Attached is a Section B review form for Vista Hydrochloric Acid, This is being submitted in support of an application by Crompton & Knowles Corporation, Dyes & Chemical Division.
Sincerely,
Thomas G. Grumbles, C.I.H. Manager Environmental Affairs
dlj
cc: R. R. Cooley
VVV 000011220
Initial ii NSF Std. 60/61-Uisted
NSF USE ONLY [ \ Document Control Code. ________ Company No. ____________________
Accepted By ___________________
TOXICOLOGY DATA REVIEW SUBMISSION - SECTION B
NATIONAL SANITATION FOUNDATION STANDARD 60 DRINKING WATER ADDITIVES
(CONFIDENTIAL INFORMATION)
SECTION B. TO BE COMPLETED BY SUPPLIER, unless the ingredient Is NSF Standard 60- or
61-Listed. (See instructions before completing).
Supplier name Vista Chemical Company
Address
900 Threadneedle Houston. Texas 77079
Name/Teleohone number of Supplier contact
Tom Crumbles 713-538-3445
Plant location/address
3441 Fairfield Road Baltimore, MD 21226
Name/Teienhnne number nf ntant
Je Oregg 301 354 5964
1. Name of chemteaInfuse nomenclature adopt by Chemical Abstracts) hvdrnrhlnric acid Jf
2. Chemical Ab^H|
@r (if applicable) 7647-01-0
3. Trade name /
Muriatic Acid
4. Structural formula6
6. Molecular weight (average molecular weight distribution, if polymer) 36.5
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6. Describe the method of manulacture of the ingredient listed above. Specify chemicals used in the manufacturing process. If the ingredient is synthesized, give reactants, catalysts, process aids, etc. If the ingredient is mined, give chemicals used in the processing and purification, etc. (Use additional pages as necessary). See Attachment I________________
7. Composition of formulation and related information: List suppliers and chemical names of materials, ingredients, reactants. Place an M.I.R.P in the column marked ( ) to indicate if the chemicals shown below are Materials. Ingredients, Reactants, or Processing aids. Include manufacturing tolerances for parts by weight (percent composition).
Trade Name
Chemical Description
CAS No.
Parts by
Weight (%* ppm)
Supplier
Hydrogen chloride Prouss Chlorine Activated Carbon Benzene Paraffin Aluminum chloride
HC1 Water - H2O
Cl2
Carbon C&H6
AICI3
32% 68%
< 1 ppm PPG, Olin, Occidental 1 ppm Envirotrol <50ppb Texaco, Sun
< 1 ppm Vista Lake Charles <. 1 ppm Vanchlor, Witco,
Welland
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ATTACH KNOWN METHOO(S) OF ANALYSIS FOR FORMULATION OR INGREDIENTS. IF AVAILABLE.
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ATTACHMENT 1
VISTA PROCESS DESCRIPTION - HYDROCHLORIC ACID PRODUCTION
Vista's NALKYLENE* alkylate process is a proprietary process which
reacts normal paraffins with chlorine to produce chloroparaffin and
then alkylates benzene with the chloroparaffin in a Friedel-Crafts
reaction catalyzed with aluminum chloride. Both the chlorination
and alkylation reaction liberate HC1 gas which is absorbed in water
to produce hydrochloric acid.
The hydrochloric acid is then
subjected to multiple purification steps before being sold. A more
complete description of the hydrochloric acid production and
purification production and purification process at the Vista plant
is as follows:
CHLORINATION STEP
The major feedstocks to the chlorination section of the Vista NALKYLENE* process are normal paraffins in the decane to dodecane range and chlorine. Chlorine is fed into a chlorination reactor where it reacts with liquid paraffin to form chloroparaffin. The chlorination step liberates gaseous HC1 by the following reaction:
H
ch3(ch2)8ch3 + ci2 --> ch3-c-(ch2)7-ch3 + HC1
Cl
Off-gas from the chlorination reactor is sent through a chlorine absorber where normal paraffin is used to react with any chlorine residual in the off gas. Chlorine free HC1 off-gas flows from the chlorine absorber to the HC1 purification/absorption section of the process.
ALKYLATION STEP
The chloroparaffin from the chlorination section of the Vista
NALKYLENE* alkylate process flows to the alkylation section and is
reacted with benzene and follows the typical Friedel-Crafts reaction
where anhydrous aluminum chloride acts as the catalyst.
The
alkylation section also liberates HC1 gas by the following reaction:
HH
I
CH3-C-(CH2)7-CH3 + C6H6--------^CH3-C-(CH2)7-CH3 + HC1
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Cl c`h6
The HCl gas from the alkylation reaction is separated from the crude alkylation reaction liquid under a slight vacuum in order to remove as much HCl as possible. The HCl off-gas is compressed and fed to the HCl purification/absorption section of the process.
HC1 PURIFICATION/ABSORPTION
Since the alkylation reaction is carried out in the presence of
excess benzene, the off-gas from the alkylation section contains
benzene as well as HC1. There is also a limited quantity of benzene
in the chlorination section off-gas. During the initial step of the
HCl purification/absorption process the benzene concentration in the
HC1 off-gas streams is greatly reduced by contacting the combined
chlorination/alkylation off-gas streams with chloroparaffin in an
absorption tower. The chloroparaffin absorbs benzene. The HCl gas
is then sent to a second absorption process where fresh water is
used to absorb the HCl gas to form hydrochloric acid.
The
chloroparaffin stream is sent to the alkylation reaction section.
Fresh water is used in a two stage falling film absorption process to convert the HCl gas into hydrochloric acid. Final scrubbers
remove any residual HCl from the inert gases which were present in the off-gas HCl prior to their venting to the atmosphere. The crude hydrochloric acid product is sent to the acid purification section.
HYDROCHLORIC ACID PURIFICATION
The crude hydrochloric acid from the acid absorption process contains about 1000 ppm of organic contaminants, therefore, additional purification is required to produce a final hydro-chloric acid product. Purification is accomplished in two steps by first contacting the hydrochloric acid with pure paraffin feedstock in a two stage contact/separation step and then final filtration with activated carbon.
A pure paraffin stream is contacted with the hydrochloric acid and then separated from the acid in a coalescing filter/separation vessel. Two vessels are used in series to get the optimum contact and separation, the pure paraffin stream absorbs benzene and other organic contaminants from the hydrochloric acid. It is however, almost completely insoluble in acid itself. Therefore, the total organic content of the hydrochloric acid is reduced to about 10 ppm after this step. The final carbon filtration step reduces the total organic concentration to less than 0.1 ppm (by hexane extraction analysis) and the benzene concentration to less than 0,05 ppm (by photo ionization detector chromatograph).
To summarize the byproduct hydrochloric acid produced by the process described above will contain less than 0.1 ppm of total extractable organics and less than 0.05 ppm benzene.
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0. Has the purity or expected ounty range of the ingredient been determined? X yes _____ no _____ unknown to this Company
U yes. specify the purity or expected purity range 31.45 to 32.75% HCL
9. Specify known or suspected impurities in the ingredient including, but not limited to: unreacted starting materials, impurities in the starting materials, products of side reactions, and low molecular weight polymer fractions. See Attachment II______________________
10. If the ingredient is not intended to be dissolved in drinking water, has the water solubility been determined?
yes ___________no
X unknown to this Company ___ _^not applicable
II yes. specify the water solubility. Include the temperature and pH conditions under which the solubility was determined.
It. If the PRODUCT is not intended to be dissolved in drinking water, has migration/extraction of any INGREDIENT from the product to water {or other solvent) been determined?
yes ___________no
X Unknown to this Company
... not applicable
If yes. attach report or complete the following information. If information is available for more than one ingredient, attach the relevant report or copy this page for each ingredient.
Ingredient______________________________________
'
Product or form in which the ingredient was testea
Amount tested Concentration of ingredient
Solvent___________________________________ Amount of solvent Temperature of test_______________________ pH of test
Duration of test_________________________________________________________________________________________
Method of ingredient analysis_____________ ._____ ______________________________________________________
Detection limit of method___________________
Sensitivity of method______________
____________________________________________________
Level of ingredient migrating/extracting ____________________________________________________________
12. If the PRODUCT is not intended to be dissolved in drinking water, has migration/extraction of an IMPURITY in any ingredient from the product to water (or other solvent) been determined?
yes no X___ Unknown to this Company _____ not applicable
If yes, attach report Of complete the following information. If information is available for more than one impurity, attach the relevant report or copy this page for each impurity.
Impurity__________________________ _______________________________________________________________________ Product or form in which the ingredient was tested__________________ Amount tested_ Concentration of ingredient
{Continued next page)
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ATTACHMENT II QUESTION 9 RESPONSE
Unreacted Starting Materials_______
Chlorine (<1 ppm)*
Impurities In Starting Materials
Aluminum (<1 ppm)
Calcium (16 ppm)
Iron (<1 ppm)
Magnesium (5 ppm)
Sodium (6 ppm)
Chloroform (<20 ppb)
1-2
Dichloroethane
(<100 ppb)
Methy Chloride (0.6 ppm)
Methylene Chloride (40 ppb)
Chloroethane (25 ppb)
Other Contaminants Benzene (<10 ppb) Toluene (<25 ppb)
* Typical concentration in Hydrochloric Acid Product
ppm " parts per million ppb -- parts per billion
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Solvent_____________
Amount of solvent
Temperature of test
pH Of test____
Duration of test________________________________________ ________________________ __ ______ _____
Method of impurity analysis_____________________________________________________________________________
Detection limit of method_______________________________________________________________________________________
Sensitivity of method_______________________________ ___________________________________________________________
Level of impurity migrating/extracting______________________________________________ __________________________
13. If a contaminant (product, material, ingredient, reactant, or impurity) has received prior acceptance or clearance, please list contaminant(s) and cite specific acceptance reference (e g. Title 21 Code of Federal Regulations, with appropriate section and paragraph number. Food Chemicals Codex, US Environmental Protection Agency National Primary Drinking Water Regulations). If a Maximum Contaminant Level (MCL) has been determined under the USEPA National Primary Drinking Water Regulations, please list the MCL.
Contaminant (Prod., material. ingred . impurity)
Acceptance Reference
Use Restrictions:
Level in Drinking Water1
i
2
3_____________________________ . See Attachment III
5
6
7
8
9
10
14. if any material, ingredient; or other chemical introduced into drinking water as a result ot product use should be exempt from toxicology evaluation, please specify and PROVIDE JUSTIFICATION (e.g. non-migratory, no residual. MCL available).__________________________________
NOTE: IF ITEMS 13 AND/OR 14 ADDRESS ALL MATERIALS. INGREDIENTS. REACTANTS. AND IMPURITIES IN THE PRODUCT, THEN SKIP ITEMS 15. 16. 17, AND GO TO ITEM 18.
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1 Anticipated level in drinking water based on the Evaluation Dose as described in Standard 60, and using accepted methods as described in Standard 60. Appendix B.
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ATTACHMENT III QUESTION 13 RESPONSE
ACCEPTANCE REFERENCES FOR PRODUCT AND CONTAMINANTS
PRODUCT
1. FCC Hydrochloric Acid Monograph - 3rd Edition Specific limits: Benzene <0.05 mg/kg Extractable Organic Compounds <5mg/kg (non-fluorine containing)
2. FDA 21 CFR 182.1057 Hydrochloric Acid is multiple Purpose GRAS Food Substance when used as butter and neutralizing agent.
CONTAMINANTS
Benzene
U.S. EPA Primary
Drinking
Water
Standard (MCL)
5 Pg/1
1-2 Dichloroethane
U.S. EPA Primary Drinking Water Standard (MCL)
5 |ig/l
Methylene Chloride
U.S. EPA Primary Drinking Water Standard (MCL)
5 Hg/1 (proposed 1990)
Chloroform
U.S. EPA Primary Drinking Water Standard (MCL)
(Included in total Trihalomethane limits of 0.1 pg/1)
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Document control code (NSF use)_________
15. The anticipated exposure level will dictate toxicology testing requirements. NSF may require complete copies of all toxicity reports. Please list the specific toxicology studies and dates conducted, the results of which are to be used in support of the product application. Toxicology studies may describe the potential toxicity ol the product, or of a particular material, ingredient, or extraction mixture appropriate to the application. (Use additional pages, if necessary.)
Mutagenicity (Specify Ames, chromosomal aberration, etc.)
Type of study________________________________________________________________________________________ _
Report title
Report date/Journai reference Author or conducting laboratory
Type of Study__________________
Report title
Report date/Journal reference__ Author or conducting laboratory
Acute toxicity
Type of study___________________
Report title______________________
Report date/Journal reference__ Author or conducting laboratory
Type of study______________ _
Report title_____________________ Report date/Journal reference___ Author or conducting laboratory
Subchronic toxicity
Type of study Report title_______ ;
_______
Report date/Joumal reference__ Author or conducting laboratory
Type of study__________________
Report title _________________
Report date/Journal reference__ Author or conducting laboratory
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ReproOuctive/developmentat toxicity
Type of study____________ .____________________________________________________________________
Report title_____________________ ______________________________ ________________________________ Report date/Journal reference_______________ _________________________ __ _____________________ Author or conducting laboratory_______________________________________________________________
Type of study__________________________________________________________________________________
Report title_____________________________________________________________________________________ Report date/Journal reference________________________________________________________ ________ Author or conducting laboratory__________________________________________________ ^__________
Teratology Type of study_________________________________________ _____________________________________ _
Report title______________________________________ ________________________________ _____________ Report date/Journal relerence______________________________________ Author or conducting laboratory________ __________________________________________ ____________
Type of study; .____________________________________________________________ _________________
Report title_____________________________________ Report date/Journal reference__________________________ _______________________________________ Author or conducting laboratory______________________ ________________________________________
Chronic toxicity/carcmogenicity
Type of study_____________________________
Report title___________________ _.
_______________________________________________________
Report date/Journal reference_______ __________________________________________________________ Author or conducting laboratory______________________________________________________________
Type of study
Report title_______ ::
_____________________________________________________________________
Report date/Journal reference__________________________________ Author or conducting laboratory
Supplemental studies (specify metabolism, neurotoxicity, etc.)
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Type of study______________
Report title_______________________________________________________________________________________ _______________
Report date/Journal reference ______________________________________________________________________________ Author or conducting laboratory
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Type of Study__________________
Report title__________
Report date/Journal reference__ Author or conducting laboratory
Type of study_______________
Report title_____________________
Report date/Journal reference__ Author or conducting laboratory
Document control code (NSF usei
16. if a toxicology literature search has been conducted, please list the databases, database files, and the key words searched. Attach a copy of the search results.
DATABASE
FILE
KEY WORD STRINGS
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18. Please describe or attach any additional pertinent information, positive or negative, that you believe would contribute to a complete toxicologic evaluation of the product or ingredient.
19. Additional attachments? ___ no X yes Number of attachments 3
List attachments 1_____________ No. of pages
(2 )
21
31
20. Supplier certification:
I hereby certify that the information provided is accurate and complete, and that I. and the Company I represent, know of no reason the product described herein should not be used in contact with drinking water.
Company name____________Vista Chemical Company _________________________________________
Phone 71 T-sftft-3445]Telex
_____________________ FAX 713-5BS-3456
(The following authorization is OPTIONAL. It in no way authorizes NSF to Share the information with other Suppliers or. Applicants. Authorized NSF staff ONLY will be allowed access to this information.)
I give the National Sanitation Foundation permission to use the information contained in this TDRS
Part B application as a basis for reviewing/accepting other products which use the tngredient/maierial/ product covered by this application.
Signaturg/Title
___________ _
insert completed form in the Confidential Business Information envelope provided, seal the confidential envelope in an outer envelope, and return to:
Additives Toxicology Group NATIONAL SANITATION FOUNDATION P.O. Box 1468 Ann Arbor. Ml 48106
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