<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-09-14</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001578932</issuerCik>
        <issuerName>OCI Partners LP</issuerName>
        <issuerTradingSymbol>OCIP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001378446</rptOwnerCik>
            <rptOwnerName>Sawiris Nassef</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O OCI PARTNERS LP</rptOwnerStreet1>
            <rptOwnerStreet2>5470 N. TWIN CITY HIGHWAY</rptOwnerStreet2>
            <rptOwnerCity>NEDERLAND</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77627</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>SEE REMARKS</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Units (Limited Partner Interests)</value>
            </securityTitle>
            <transactionDate>
                <value>2016-09-14</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>800</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.7838</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>723958</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>REFER TO FOOTNOTES</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Units (Limited Partner Interests)</value>
            </securityTitle>
            <transactionDate>
                <value>2016-09-15</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>100</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.80</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>724458</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>REFER TO FOOTNOTES</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The units were purchased in a single transaction at a price of $5.7838 per unit.</footnote>
        <footnote id="F2">The units of the Issuer reported on this Form 4 are held by a direct or indirect wholly-owned subsidiary of NNS Holding. NNS Holding is an exempted company incorporated in the Cayman Islands with limited liability. Its registered address is 89 Nexus Way, Camana Bay, Grand Cayman, Cayman Islands. Its principal business is holding diversified industrial and financial investments, and in connection with this, NNS Holding is, through its wholly owned subsidiaries, a significant shareholder of OCI N.V. The entire share capital of NNS Holding is held by the NNS Jersey Trust, an irrevocable trust, whose beneficiaries are principally Mr. Nassef Sawiris (the &quot;Reporting Person&quot;) along with his descendants. The Reporting Person is the settlor of the NNS Jersey Trust. He is charged with exploring investment opportunities appropriate for NNS Holding based on his investment expertise.</footnote>
        <footnote id="F3">The Reporting Person may be deemed to be the beneficial owner of the units of the Issuer described herein. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of his pecuniary interest therein. The filing of this statement shall not be deemed an admission that, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, the Reporting Person is the beneficial owner of all such equity securities covered by this statement.</footnote>
        <footnote id="F4">The units were purchased in a single transaction at a price of $5.8000 per unit.</footnote>
    </footnotes>

    <remarks>The Reporting Person is a director of OCI GP LLC, the general partner of the Issuer (the &quot;General Partner&quot;). The Issuer is managed by the directors and executive officers of the General Partner. The Reporting Person is also a Director and Chief Executive Officer of OCI N.V. whose principal business address is Herikwebergweg 238, 1101 CM Amsterdam, The Netherlands.</remarks>

    <ownerSignature>
        <signatureName>/s/ Fady Kiama, Attorney-in-Fact for Nassef Sawiris</signatureName>
        <signatureDate>2016-09-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
